Total 4,430 technical support engineer job vacancies in Information Technology category in Hong Kong

Key Responsibilities

• Design, develop, and maintain robust, scalable, and high-performance applications using Java
• Build and enhance backend services, APIs, and microservices architectures
• Collaborate with frontend developers, QA engineers, and DevOps teams to deliver end-to-end solutions
• Participate in system design discussions, code reviews, and technical decision-making
• Troubleshoot, debug, and optimize application performance
• Ensure code quality through best practices, testing, and documentation
• Contribute to Agile ceremonies including sprint planning, stand-ups, and retrospectives

Requirements

• Degree in Computer Science, Engineering, or related field
• Strong experience in Java development (Spring Boot preferred)
• Proven experience in building scalable and distributed systems
• Familiarity with RESTful APIs, microservices, and cloud environments
• Experience with databases (SQL/NoSQL) and performance tuning
• Understanding of CI/CD pipelines and DevOps practices
• Strong problem-solving skills and ability to work independently

Good to Have

• Experience with containerization tools (Docker, Kubernetes)
• Exposure to cloud platforms (AWS, Azure, or GCP)
• Knowledge of messaging systems (Kafka, RabbitMQ)
• Familiarity with frontend technologies (React, Angular)

Work Location: Central

(EA Reg No: 20C0312)

Please email a copy of your detailed resume to kayla@talentsis.com.sg for immediate processing.

Only shortlisted candidates will be notified.

We are seeking a Software Engineer with strong backend development experience in Java and Spring Boot.. You will design, build, and maintain scalable microservices and deploy them on cloud platforms (AI Cloud or equivalent).

This is a 1-year direct contract role.
Key Responsibilities

• Design, develop, and maintain scalable backend applications using Java and Spring Boot

• Build and deploy microservices on cloud platforms

• Collaborate with cross-functional teams to define and deliver features

• Deploy, monitor, and manage applications in cloud environments

• Troubleshoot, debug, and optimize application performance

• Follow best practices in coding standards, testing, and deployment

• Participate in code reviews and continuous improvement

• Liaise with Mandarin-speaking stakeholders, vendors, and technical teams as required.

About the Role

We are seeking a highly skilled and experienced Senior Network Engineer on behalf of our client to design, implement, maintain, and automate robust data center and enterprise network infrastructures.

This is a critical role requiring a rare technical trifecta: hands-on, expert-level mastery across Cisco, Juniper, and Micas platforms. If you are a seasoned engineer who thrives in complex, multi-vendor environments, loves bridging the gap between physical infrastructure and cutting-edge network automation, and enjoys mentoring junior talent, we want to hear from you.

Key Responsibilities

• Multi-Vendor Infrastructure Management: Oversee, configure, and troubleshoot complex data center and enterprise environments spanning Cisco, Juniper, and Micas platforms.

• Advanced Routing & Switching: Maintain high-availability network architectures utilizing advanced Layer 1–3 protocols ($BGP$, $OSPF$, $MPLS$, $VRF$, and multicast).

• Network Automation: Drive efficiency by developing and implementing automation workflows, infrastructure as code (IaC), and scripting solutions.

• Physical DC Operations: Oversee structured cabling, fiber optics, and physical space planning within the data center environment.

• Security & Compliance: Enforce robust network security postures across multi-vendor environments using AAA, 802.1X, ACLs, and firewalls.

• Monitoring & Documentation: Utilize DCIM and observability tools to ensure uptime, and author comprehensive technical documentation (SOPs, MOPs, and detailed network diagrams).

• Leadership & Mentorship: Act as a technical escalation point and provide guidance, coaching, and mentorship to junior and mid-level engineering staff.

Required Technical Skills & Qualifications

Core Experience

• 7+ years of dedicated experience in enterprise networking and data center operations.

Platform Expertise (Must possess hands-on experience in ALL three)

• Cisco: Catalyst, Nexus, ASR, and ISE.

• Juniper: Junos, EX, MX, and SRX series.

• Micas: Proven hands-on deployment and management experience.

Networking Fundamentals & Protocols

• Deep understanding of Layer 1–3 fundamentals.

• Advanced L3 routing proficiency: BGP, OSPF, MPLS, VRF, and Multicast.

Automation & Tools

• Network Automation: Proficiency with Python, Ansible, and Terraform.

• DCIM & Monitoring: Experience with NetBox, Splunk, ELK stack, or similar observability platforms.

Security & Physical Infrastructure

• Security: AAA, 802.1X, ACLs, and multi-vendor firewall administration.

• Physical Layer: Solid understanding of structured cabling, fiber optic types, and physical data center layout/operations.

Documentation & Certifications

• Strong track record of creating SOPs, MOPs, and network diagrams.

• Minimum Certification: CCNA required.

• Preferred Certification: CCNP, JNCIP, or equivalent multi-vendor certifications are strongly preferred.

Nice-to-Have Skills

• Experience with Ciena or Coriant optical transport systems.

• Familiarity with Nokia platforms.

• Knowledge of SD-WAN architectures and deployments.

• Cloud networking experience (AWS, Azure, or GCP).

• Experience implementing CI/CD pipelines for network infrastructure.

What We Offer

• Competitive salary and comprehensive benefits package.

• Opportunity to work with a highly sophisticated, diverse tech stack.

• A collaborative environment that values continuous learning and technical leadership.

• Minimum 10+ years of experience in IT/OT infrastructure and operational environments.
• Experience integrating enterprise IT networks with OT systems and industrial equipment.
• Hands-on knowledge of HMIs, PLCs, SCADA systems, sensors, CMMs, CNC machines, and 3D printers.
• Ability to update PLC configurations, IP addressing, and network parameters.
• Perform OT asset inventory collection, validation, and documentation.
• Identify operational and cybersecurity risks and proactively escalate issues.
• Strong understanding of industrial protocols such as OPC-UA, Modbus TCP/IP, Ethernet/IP, and SMB.
• Experience designing and supporting LAN/WAN networks, VLANs, and routing protocols.
• Proficiency in configuring Cisco switches, routers, SD-WAN, and Check Point firewalls.
• Experience with firewall rule management, network security configuration, and troubleshooting.
• Knowledge of network segmentation and micro-segmentation using VLANs, switches, and network taps.
• CCNA/CCNP, CompTIA Network+, or equivalent networking certification preferred.

EA License No: 11C4879 / Registration ID : R1218583

Apar Technologies Pte Ltd, Singapore

As a Lead Software Engineer within Asset Management Trading Technology, you will help transform trading. You will design, build, and evolve industry-leading platforms that manage orders and execute trades across diverse asset classes. Working closely with Traders, you will support critical applications in production and engineer solutions that automate and optimize the order management lifecycle. You will be part of a team that values technical excellence, creative problem-solving, and rapid delivery, where your expertise will directly shape the future of trading technology.

Job Responsibilities:

• Support critical applications in production, interacting directly with users to resolve issues

• Design and engineer scalable, high-performance trading systems across multiple asset classes.

• Collaborate directly with Traders to deliver impactful solutions.

• Build and develop core Java applications for mission-critical trading platforms.

• Architect and implement next-generation messaging and streaming technologies such as Kafka and AMPS.

• Drive technical innovation and contribute creative ideas for platform advancement.

• Drive the adoption and scaling of GenAI practices within the software development workflow, bringing creative ideas on how to use AI tooling effectively and reliably.

• Lead code reviews and mentor team members to ensure engineering excellence.

• Participate in the full software development lifecycle from design through to production.

• Focus on continuous improvement and fast, iterative delivery.

• Deploy code to production daily with confidence.

• Add to team culture of diversity, opportunity, inclusion, and respect

Required Qualifications, Capabilities, and Skills:

• Bachelor’s Degree in Computer Science or equivalent

• Formal Training and certification on software engineering and 5+ years of applied experience

• Proven hands-on experience designing and building end-to-end software systems.

• Strong knowledge of core Java and object-oriented design principles. Kotlin nice to have.

• Experience with messaging and streaming technologies e.g. Kafka

• Solid understanding of modern software architecture and design patterns.

• Demonstrated ability to work in a fast-paced environment.

• Commitment to building reliable, scalable, and maintainable systems.

• Ability to collaborate effectively with cross-functional teams including Traders and Quants.

• Passion for code quality, engineering excellence, and elegant solutions.

• Dedication to continuous improvement and rapid delivery.

• Strong problem-solving skills and creative thinking

Preferred Qualifications, Capabilities, and Skills:

• Experience in financial services or Trading technology.

• Knowledge of distributed systems and microservices architecture.

• Understanding of observability and telemetry principles.

• Interest in financial markets and trading workflows.

• Experience mentoring or leading technical teams.

• Exposure to low-latency or high-throughput systems.

To apply for this position, please use the following URL:

https://ars2.equest.com/?response_id=eb2af52fbc5798d0e234123e26c2e874

Job Description:

· Design, develop, and maintain secure software applications using PowerShell scripting, C++, Flutter, Dart, and Python.

· Apply UI/UX design principles to deliver intuitive, efficient, and engaging user experiences.

· Perform code reviews, debugging, and optimization for performance and security.

· Implement and enhance endpoint security features such as malware and ransomware detection, exploit prevention, and intrusion detection.

· Collaborate with security teams to integrate secure coding practices and address vulnerabilities.

· Work closely with cross-functional teams including product managers, security analysts, and designers to ensure project alignment.

· Participate in project planning, sprint reviews, and agile development practices.

· Document technical designs, processes, and procedures for development and security compliance.

· Any other ad-hoc duties as assigned.

Requirements:

· Diploma or Degree in Cybersecurity, Computer Science, or a related field.

· Minimum 3 years of hands-on experience with scripting or coding abilities in languages such as PowerShell scripting, C++, Flutter, Dart, and/or Python. Fresh graduates with related internship experience are welcome to apply.

· Knowledge of network fundamentals, cybersecurity concepts.

· Excellent written and verbal communication skills, with the ability to present information clearly.

· Strong commitment to teamwork, demonstrating a proactive and collaborative attitude.

· Fresh graduates with strong relevant skillsets and project/internship experience are welcome to apply.

Interested and suitable candidate kindly click quick apply. Resume will be forwarded to Stepfan Soon Yit

We regret that only suitable candidate will be notified.

GEMS Recruit/EA License : 23C1459

EA Personnel No : R24120893 (Stepfan Soon Yit)

You will be a key technology partner supporting strategic projects, working closely with Solution Architects, Project Managers, and Technical Leads to design, develop, test, and deploy system and network infrastructure as part of large-scale project implementations.

Key Responsibilities:

• Collaborate with engineers, project teams, and customers to deliver project objectives.
• Design, develop, test, and debug system software and infrastructure solutions.
• Identify technical risks and propose scalable, long-term solutions.
• Create and manage reusable components to improve efficiency.
• Review code and architecture, and drive best practices in design and development.
• Lead technical teams and provide mentorship.
• Stay current with industry trends and emerging technologies.

Requirements:

• Minimum 5 years of relevant experience in software or system engineering.
• Strong full-stack development and software engineering fundamentals.
• At least 3 years of hands-on experience with Agile methodologies.
• Experience across the full SDLC (design, development, testing).
• Knowledge of DevSecOps and CI/CD practices.
• Proficiency in at least one core language: Java, JavaScript, Python, C#, or C++.
• Experience with modern frameworks such as Node.js, React, TypeScript, Spring Boot, Angular, Vue, Next.js, Express, or FastAPI.
• Strong experience with SQL/NoSQL databases (e.g. MSSQL, PostgreSQL, MongoDB).
• Excellent communication, problem-solving, and leadership skills.

Location: Islandwide locations

(EA Reg No: 20C0312)
Please email a copy of your detailed resume to qianyu@talentsis.com.sg for immediate processing.
Only shortlisted candidates will be notified.

Feeling stuck in your career? It’s time for a change.

SICD’s 12-month Place-and-Train program equips you with the skills and confidence to launch a successful career as a Network Engineer.

Benefit from personalized 1:1 mentorship, a guaranteed SGD 3,000 monthly salary, and industry-recognized certifications — all designed to position you for long-term success.

Visit sicd.sg for more information, and join our upcoming webinar to learn more and ask questions about our career development program.

Key Responsibilities

• Design, develop, and maintain robust, scalable, and high-performance applications using Java
• Build and enhance backend services, APIs, and microservices architectures
• Collaborate with frontend developers, QA engineers, and DevOps teams to deliver end-to-end solutions
• Participate in system design discussions, code reviews, and technical decision-making
• Troubleshoot, debug, and optimize application performance
• Ensure code quality through best practices, testing, and documentation
• Contribute to Agile ceremonies including sprint planning, stand-ups, and retrospectives

Requirements

• Degree in Computer Science, Engineering, or related field
• Strong experience in Java development (Spring Boot preferred)
• Proven experience in building scalable and distributed systems
• Familiarity with RESTful APIs, microservices, and cloud environments
• Experience with databases (SQL/NoSQL) and performance tuning
• Understanding of CI/CD pipelines and DevOps practices
• Strong problem-solving skills and ability to work independently

Good to Have

• Experience with containerization tools (Docker, Kubernetes)
• Exposure to cloud platforms (AWS, Azure, or GCP)
• Knowledge of messaging systems (Kafka, RabbitMQ)
• Familiarity with frontend technologies (React, Angular)

Work Location: Central

(EA Reg No: 20C0312)

Please email a copy of your detailed resume to kayla@talentsis.com.sg for immediate processing.

Only shortlisted candidates will be notified.

Software Engineer cum Business Analyst (ref: 120)

Responsibilities:

• Develop and maintain Unix Shell scripts and Pro*C and Power Builder applications
• Design and implement Oracle stored procedures and triggers
• Perform impact analysis for new enhancements
• Act in a Business Analyst capacity including:

1. Interacting with business users
2. Gathering and documenting requirement
3. Preparing functional and technical specifications
4. Understanding core business processes and working independently
5. Provide production support, issue troubleshooting, and batch job monitoring
6. Coordinate with cross-functional teams to ensure smooth delivery and system stability

Job Requirements

• 5–7 years of hands-on development experience
• Strong experience in Unix/Linux Shell scripting
• Hands-on experience in Pro*C programming
• Expertise in Oracle DB, including Stored Procedures, Triggers, and Packages
• Strong SQL& PL/SQL knowledge
• Experience handling production support and batch jobs

Please Indicate Job Code “120-techBA” on the email subject

We regret that only shortlisted candidates will be notified.

John Bryan (Reg No. R1106648)

IT Consultancy & Services Pte Ltd

EA No: 92C5311

Our client is a well established data centre and IT infrastructure company that focuses on providing carrier-neutral data centre services, network connectivity, managed services and related technology solutions.

They are looking for a motivated Data Center Engineer to support the day-to-day operations and maintenance of mission-critical data centre infrastructure. In this role, you will be responsible for ensuring the reliable operation, maintenance, and optimisation of data centre facilities.

Key Responsibilities

Data Centre Operations & Reliability

• Oversee day-to-day operations of critical infrastructure including power, cooling, fire suppression, and monitoring systems.
• Ensure high availability and resilience of all active and redundant systems.
• Lead response to alarms, incidents, and emergencies, performing root cause analysis and corrective actions.

Maintenance & Engineering

• Plan and execute preventive and corrective maintenance activities.
• Review maintenance procedures and implement improvements to enhance system reliability and efficiency.
• Manage testing of backup systems (UPS, generators, switchgear, CRAC, etc.).

Customer & Stakeholder Support

• Coordinate customer installations, move-ins, turn-ons, and infrastructure changes.
• Ensure contracted SLAs and KPIs are met or exceeded.
• Liaise with internal teams, vendors, and customers to support operational requirements.

Projects & Change Management

• Support data centre projects, upgrades, and capacity expansion works.
• Review technical designs, method statements, and risk assessments.
• Oversee contractors and ensure works are carried out safely and in accordance with standards.

Safety, Compliance & Reporting

• Ensure strict adherence to workplace safety, SOPs, and regulatory requirements.
• Prepare incident reports, operational logs, and performance reports.
• Participate in shift coverage and on-call rotation as required.

Requirements

• Willing to work 24/7 rotating shifts
• Willing to work at both locations
• At least 2-3 years of relevant experience for a data centre

Work Locations

Bedok/Woodlands

(Rotation of location will be required)

Working Hours

Morning Shift: 8.30am - 8.30pm

Night Shift: 8.30pm - 8.30am

(Shifts will rotate every 2 weeks)

Shift pattern: work 3 days rest 3 days, work 2 days rest 2 days

Salary

Up to $4800

Benefits

AWS, Variable Bonus, Allowances, Flexi benefits, 21 days annual leave

Interested candidates kindly click APPLY NOW to submit your latest CV.

We regret that only shortlisted candidates will be notified.

Search Avenue Pte Ltd

EA License No.: 25C2695

EA Registration No.: R25157669 [Amanda Wee]

About Capgemini

Capgemini is an AI-powered global business and technology transformation partner, delivering tangible business value. We imagine the future of organizations and make it real with AI, technology and people. With our strong heritage of nearly 60 years, we are a responsible and diverse group of over 420,000 team members in more than 50 countries. We deliver end-to-end services and solutions with our deep industry expertise and strong partner ecosystem, leveraging our capabilities across strategy, technology, design, engineering and business operations. The Group reported 2025 global revenues of €22.5 billion.

About the Role

In this role, you will take over an existing high-performance Python/FastAPI backend and a polished Next.js frontend, ensuring seamless integration between the two. You will play a pivotal role in the platform's Phase 2 evolution: architecting the AI Marketplace, developing dynamic "Generative UIs" for autonomous agents, and laying out the groundwork for an upcoming data platform side-project.

If you are a product-minded builder who loves crafting flawless user experiences on top of complex AI backends and enjoys using AI-assisted tools ("vibe coding") to accelerate delivery, this is the role for you.

Key Responsibilities

• Core Platform & Module Development: Lead the end-to-end development of the MagicAssist platform. Design and implement robust User Management modules (handling session logic, SSO/SAML, concurrent login protection) and Analytic Dashboards from the ground up.
• Marketplace Architecture & RBAC: Build out the UI and business logic for the internal AI Marketplace. Implement complex Role-Based Access Control (RBAC) and tenant isolation to allow users to securely publish, share, and manage access to custom document chatbots, datasets, and agentic skills in compliance with the corporate policies.
• Agent Integration & Generative UI: Collaborate with the GenAI team to integrate "Magic Agents." Design dynamic component-driven interfaces (Generative UI) that render bespoke frontend widgets based on the specific "skills," code interpreters, or 3rd-party APIs the AI agent chooses to invoke.
• Analytics & Data Visualization: Track token usage metrics (input/output across different LLMs), bot performance, user engagement and other performance measures. Build rich data visualization components to support platform admins and lay the frontend groundwork for upcoming data platform and pipeline integration.
• Database & State Management: Design and maintain complex relational database schemas in PostgreSQL to support multi-version Bot/Agent workflows, unified permissions, and sliding-window chat histories.
• Security & Compliance: Maintain zero-trust architecture. Ensure robust input sanitization and integrate AWS KMS for secure JWT handling, aligning with stringent government data security standards.

Qualifications

• Experience: 5+ years of software engineering experience with a strong, proven track record in both complex frontend and backend development.
• Frontend Mastery: Advanced knowledge of React and Next.js (App Router, Server Components). Mastery of state management for persistent streaming. Experience with the Vercel AI SDK or building Generative UIs is a massive plus.
• Backend Mastery: Deep expertise in Python and FastAPI (asynchronous programming, middleware, background tasks, API integrations).
• Database Expertise: Mandatory proficiency in Relational Database Management Systems (PostgreSQL) and complex schema design.
• AWS Familiarity: Practical experience with AWS services (S3, IAM, Lambda, DynamoDB).

Nice-to-Have (Bonus Points):

• Data Analysis Background: Previous experience as a Data Analyst or building internal data/analytics platforms is a strong advantage for upcoming projects.
• GenAI Ecosystem: Hands-on experience with AWS Bedrock (Converse API, Knowledge Bases) or integrating LLM APIs.
• UI/UX & Visualization: Experience with data visualization libraries (e.g., Recharts, D3.js, Chart.js) is required for building the analytics dashboards.
• Regulated Environments: Prior experience building internal enterprise tools with high security requirements (e.g., IM8 policies in the Singapore government sector).

Let's talk about what's in it for you!

Passionate people are Capgemini's Ace of Spades - join us to discover a career that will challenge, support and inspire you. Working at Capgemini you'll find the rewards are more than just financial. You will work alongside some very smart and inspiring people on exciting projects and you will also enjoy incredible benefits. We offer flexible work practices and 40 hours of self-development every year with a huge selection of learning opportunities to choose from.

As "Architects of Positive Futures", Capgemini actively supports the community in 3 ways:

Diversity and Inclusion - we believe diversity of thought fuels excellence and innovation, which is why we positively encourage applications from suitably qualified candidates regardless of their gender identity, ethnicity, sexual orientation, religion, ability, intersex status or age. To support our commitment to diversity and inclusion, we celebrate special events and days of significance that are important to our employees such as Diwali, Bastille Day, Pride, IDAHOBIT, IWD and International day of people with Disabilities. Our Employee Resource Groups Women@Capgemini and OutFront support the grassroots passion of employees to drive our diversity agenda and effect change.

Digital inclusion - at Capgemini we are using our skills to drive social impact initiatives focusing on helping society address the impact of the digital and automation revolution. We also provide employees with opportunities to give back to the community through charity projects and volunteer days.

Environmental Sustainability - Capgemini joined the CDP's (Carbon Disclosure Project) prestigious "A list" for its commitment to the Net-Zero economy. We are focusing on helping our clients transform towards more sustainable business models and committing to reduce our own carbon emissions (GHG) by 20% per employee by 2020.

Recognised by Ethisphere as one of the World's Most Ethical Companies for the last 8 years in a row, ethics and values are at the heart of Capgemini's corporate culture and business. Embedded in our DNA, our seven values - Honesty, Boldness, Trust, Team Spirit, Freedom, Fun and Modesty - have remained the same since company inception in 1967. To see how we bring these values to life, click here to listen to some of our employee’s stories.

Come join us, bring your whole self to work, create new possibilities for you, your customers and your community and help us to be Architects of Positive Futures.

Job Description

• Build data pipelines (ETL) to enable scalable processing of large volumes of data in AWS environment (Informatica, Pentaho)
• Organise, build and maintain data stores (e.g., RedShift, RDS) of structured and unstructured data (e.g., text, customer transactional data, work-flow/ticket/log data)
• Co-evaluate business needs and objectives
• Identify opportunities for data acquisition
• Conduct data analysis, working independently or with data analysts, and report on results
• Analyze and organize raw data
• Interpret trends and patterns
• Prepare data for prescriptive and predictive modeling
• Combine raw information from different sources
• Explore ways to enhance data quality and reliability
• Work with stakeholders to identify and solve business needs related to advanced data processing

Job Requirements

• Minimally a Degree in Computer Science, IT, or similar field
• At least 1 year experience working with SQL or as a data engineer or in a similar role.
• Proven work experience with ETL tool such as Pentaho Data Integration (KETTLE), Informatica.
• Excellent SQL knowledge and with proven experience with Data Analysis, Data Profiling and Data Processing.
• Good knowledge of working with databases such as Oracle, PostgreSQL, RedShift.
• Experience working with Tableau or similar BI tools.
• Technical expertise with data models, data mining, and segmentation techniques
• Ability to integrate data /data streams from different sources
• Great numerical and analytical skills
• Detail-oriented, with excellent organizational skills and experience

Interested candidate please click "APPLY" to begin your job search journey and submit your CV directly through the official PERSOL job application platform - GO Mobile.

This is in partnership with Employment and Employability Institute Pte Ltd (“e2i”). e2i is the empowering network for workers and employers seeking employment and employability solutions. e2i serves as a bridge between workers and employers, connecting with workers to offer job security through job-matching, career guidance and skills upgrading services, and partnering employers to address their manpower needs through recruitment, training and job redesign solutions. e2i is a tripartite initiative of the National Trades Union Congress set up to support nation-wide manpower and skills upgrading initiatives. By applying for this role, you consent to e2i’s PDPA.

By sending us your personal data and curriculum vitae (CV), you are deemed to consent to PERSOL Singapore Pte Ltd and its affiliates to collect, use and disclose your personal data for the purposes set out in the Privacy Policy available at https://www.persolsingapore.com/policies . You acknowledge that you have read, understood, and agree with the Privacy Policy.

PERSOL Singapore Pte Ltd

• RCB No. 200007268E • EA License No. 01C4394

• Reg. R23118506, Goh Li Min

Successful candidate must be comfortable with rotation shifts and weekends as and when required.

Responsibilities:

Should focus on day-2-day operations, incident, change management, and user centric troubleshooting.

Operate and continuously improve the organization’s Secure Access Service Edge (SASE)services using Zscaler Internet Access (ZIA) and Zscaler Private Access (ZPA),ensuring secure, reliable user connectivity and strong policy governance.

• Run day-to-day operations for ZIA (web gateway, SSL inspection, URL filtering, cloud app control, sandbox, DLP , DNS security).

• Run day-to-day operations for ZPA (App Segments, Access Policies, Connector management, posture requirements, policy troubleshooting).

• Monitor service health and user experience; proactively identify trends and recurring issues.

• HandleL2/L3 incident troubleshooting: authentication issues (SSO/SAML),PAC/forwarding issues, tunnel/connector issues, policy blocks, certificate/SSL inspection issues.

• Perform policy administration: create/update rules, exceptions, and change deployments following CAB/ITSM change controls.

• Maintain forwarding architecture: Zscaler Client Connector, GRE/IPsec tunnels, PAC files, forwarding profiles, location configuration, traffic steering.

• Manage integrations: IdP (Azure AD/Entra ID, Okta, ADFS), SIEM (Splunk/QRadar),ticketing (ServiceNow), endpoint tools (Intune/Jamf), MFA.

• Execute routine operational tasks: connector upgrades, certificate updates, location updates, application onboarding to ZPA, user/group updates.

• Work with vendors/TAC; drive cases to closure and implement corrective actions.

• Maintain documentation: runbooks, SOPs, troubleshooting guides, policy standards, onboarding checklists.

• Support audits and compliance: policy reviews, recertification evidence, logging/retention checks. Menlo Web Isolation Maintain allow-list/whitelist for approved URLs/domains based on business justification and security requirements.

• Manage exception lifecycle: approvals, expiry dates, periodic review/cleanup, and recertification evidence.

• Ensure isolation policies align with ZIA policies and do not create conflicting user experience (e.g., bypass vs isolate logic) Site not loading in isolation, rendering issues, broken web apps, file download/upload restrictions, clipboard/printing controls (as applicable)

Any other ad-hoc duties as assigned by supervisor.

Requirements:
Degree in IT or related discipline

Good to have:

• Strong working knowledge of ZIA (SSL inspection, URL filtering, CASB/app control, sandbox, forwarding methods).

• Strong working knowledge of ZPA (connectors, app segments, access policies, posture, authentication flows).

•Troubleshooting across endpoint + network + identity (DNS, TLS cert chains, proxy behavior, SAML/SSO, routing).

•ITSM/change management discipline (ServiceNow/JIRA), documentation habits. Strong knowledge about Zero Trust concepts

•Nice-to-have: SIEM integration, DLP, basic scripting (PowerShell/Python) forops automation.

Interested applicants, please email your resume to Karin Chan Wei Kien

Email: karinchan@recruitexpress.com.sg

CEI Reg No: R1104584

Recruit Express Pte Ltd

UEN: 199601303W

EA Licence No: 99C4599

Role: MobileCore Network Ops Engineer (4G/5G)
Location: Singapore

We are partnering with a leading organisation to hire a Mobile Core Network OpsEngineer (4G/5G) to support critical telecom infrastructure and ensure seamlessnetwork operations.

About theRole

You will beresponsible for the operation, maintenance, and troubleshooting of 4G/5G corenetwork systems, ensuring high service availability and performance, includingsupport for international roaming services.

KeyResponsibilities

• Manage and support 4G/5G Mobile Core nodes (e.g., IMS, HSS, UDM, SBC, MSS, etc.) to ensure smooth network operations
• Perform system maintenance, including patching, upgrades, and performance optimisation
• Monitor network performance, KPIs, and alarms to maintain service quality
• Troubleshoot and resolve end-to-end network issues across core systems
• Collaborate with local providers and international roaming partners for testing and service assurance
• Implement security hardening and vulnerability management to mitigate risks
• Develop and maintain operational processes and documentation

Requirements

• Degree in Electronics, Communications, Networking, or related field
• Minimum 3-5 years of experience in the Telco industry
• Strong knowledge of 4G/5G core networks and call flows
• Familiarity with protocols such as IMS, VoLTE, SS7, Diameter, SIP, SCTP
• Hands-on experience in network troubleshooting (end-to-end)
• Exposure to VoLTE roaming and IREG testing
• Understanding of network and application security
• Knowledge of IP networking (switching & routing)
• Experience working with Linux and virtualised environments
• Basic scripting/programming skills (e.g., Python, Shell)

UEN: 202329526G

EA Licence: 23S2061