Backend API Developer

ST ENGINEERING INFO-SECURITY PTE. LTD.; Singapore; On-site; SGD 70,000 - 110,000; Full time

Job summary

A leading cybersecurity firm in Singapore seeks a skilled individual to co-design and optimize large-scale data systems. The ideal candidate will develop secure 5G-aligned APIs and implement robust threat detection measures while ensuring compliance with GDPR and HIPAA standards. Expertise in Docker, API security frameworks, and strong communication skills are essential. This role provides an opportunity for growth in a collaborative environment committed to continuous improvement.

Qualifications

• Expertise in Docker/Kubernetes for designing, deploying, and scaling containerised services.
• Strong background in data-driven system design, including time-series databases and stream processing.
• Experience securing RESTful/gRPC APIs with OAuth2 and JWT.

Responsibilities

• Co-design and optimize large-scale data systems.
• Develop APIs compliant with 3GPP standards for 5G.
• Implement real-time correlation and threat detection.
• Secure API and data workflows according to OWASP API Security top 10.
• Ensure compliance with GDPR and HIPAA standards.
• Establish security configurations for Kubernetes and Linux infrastructure.
• Work collaboratively with QA and DevOps teams on security testing.
• Maintain detailed API security documentation.

Skills

Docker/Kubernetes

Data-driven system design

Git

Agile/SCRUM methodologies

CI/CD toolchains

OAuth2

JWT

Rate-limiting frameworks

Strong communication skills

Tools

Kafka

Apache Pulsar

Redpanda

Job description

ST Engineeringis a global technology, defence andengineering group with offices across Asia, Europe, the Middle East and the U.S., serving customers in more than 100 countries. The Group uses technology and innovation to solve real-world problems and improve lives through its diverse portfolio of business across the aerospace, smart city, defence and public securitysegments. Headquartered in Singapore, ST Engineering ranks among the largest companies listed on the Singapore Exchange.

Join our Cyber Team

We are an industry leader in cybersecurity with over two decades of experience, we deliver a holistic suite of trusted cybersecurity solutions to empower cyberresilience for government and ministries, critical infrastructure, andcommercial enterprises. Backed by our indigenous capabilities and deep domainexpertise, we offer robust cyber-secure products and services in cryptography, cybersecurity engineering, digital authentication, SCADA protection, audit andcompliance. We specialise in the design and build of security operationscentres for cybersecurity professionals and provide managed security servicesto strengthen the cybersecurity posture of our government and enterprisecustomers.

Job Overview

• Co-design & optimise large-scale data systems:Collaborate on database schema design for managing high-volume datasets
• Develop 5G-aligned APIs:Build RESTful/gRPC APIs compliant with 3GPP standards to interface with 5G core components.
• Implement real-time correlation & threat detection:Use Kafka Streams or equivalent frameworks to correlate network indicators with metadata.
• Secure API and data workflows:Enforce OAuth2/JWT authentication, input validation, and rate limiting to mitigate vulnerabilities (SQLi, XSS) aligned with OWASP API Security Top 10.
• Ensure compliance and integrity:Apply GDPR/HIPAA standards to API data handling and implement audit trails for regulatory reporting.
• Modern infrastructure practices:Establish baseline security configurations for Kubernetes & Linux infrastructure, including container hardening and automated CI/CD pipelines.
• Collaborative development:Work with QA and DevOps teams to integrate security testing (SAST/DAST) into deployment workflows.
• Documentation ownership:Maintain detailed API security documentation, including threat models, access control policies, and audit logs.

Minimum Qualifications

Core technical skills

• Expertisein Docker/Kubernetes for designing, deploying, and scaling containerisedservices.
• Strongbackground in data-driven system design (e.g., time-series databases, streamprocessing).
• Proficiencyin Git, Agile/SCRUM methodologies, and CI/CD toolchains

API and security

• Experiencesecuring RESTful/gRPC APIs with OAuth2, JWT, and rate-limiting frameworks.
• Knowledgeof OWASP API Security Top 10 and compliance standards (GDPR, HIPAA).

Preferred Qualifications

• 5Gprotocols: Familiarity with 3GPP specifications (TS 29.500-series), HTTP/2SBIs, or 5G NR protocols (NGAP, PFCP).
• Streamingplatforms: Production experience with Apache Kafka, Pulsar, or Redpanda forhigh-throughput data pipelines.
• Time-seriesAPIs: Prior work on APIs handling telemetry, IoT, or network metrics.

Soft Skills

• Strongcommunication skills to collaborate with cross-functional teams (frontend, QA,network engineers).

Work Location: Jurong East

Find out more: https://www.stengg.com/cybersecurity

ST Engineering believes in fostering a culture where team membersare encouraged to overcome challenges, explore new ideas, and work together tosucceed. We value individuals who are determined to push beyond the boundaries,and have a thirst for knowledge, continuous learning, and self-improvement.