API Gateway Developer

Job Title : API Gateway Developer & Platform Specialist

Job Mode : 12 months Renewable contract

Work arrangement : Remote- Hybrid

Role Overview :

We are seeking a Senior API Gateway Developer to join the IT Platform team, responsible for the end-to-end API lifecycle – from design and security governance to onboarding automation, developer portal customisation, and performance monitoring. The role focuses on enabling enterprise and partner integrations, supporting digital transformation towards an API-driven architecture.

Key Responsibilities :

API Gateway Development : Design, configure, and manage Layer7 (or equivalent) API Gateways, ensuring scalability, security (OAuth2, JWT, mTLS, IP whitelisting), and compliance with governance standards.

Integration & Standards : Work with REST, GraphQL, SOAP, JSON, XML, and CSV; implement transformations and schema validation.

Performance & Monitoring : Optimize API performance (caching, payloads, pooling); monitor via Prometheus, Grafana, ELK, or Splunk; set up automated alerts and health checks.

Platform Engineering & DevOps : Automate CI / CD deployments (Jenkins, GitLab, AWS DevOps); integrate with JIRA; implement versioning and rollback strategies.

Onboarding & Lifecycle : Streamline onboarding for internal / external teams; manage provisioning, sandbox access, keys, and SLAs; customize developer portals; maintain documentation (Swagger, Postman, Confluence).

Requirements :

Degree / Diploma in Computer Science, Engineering, or equivalent.

5+ years API development / integration; 3+ years API Gateway engineering.

Hands-on with Layer7 ; exposure to Apigee, MuleSoft, Kong, AWS API Gateway, or Azure API Management.

Strong knowledge of API security protocols (OAuth2, mTLS, JWT, OIDC).

Experience with CI / CD, scripting (Python, Shell, Groovy) , and monitoring tools.

Good understanding of databases, server-side technologies, and cloud (AWS preferred).

Familiarity with hybrid deployments, Kubernetes, and containerized gateways (advantage).

Soft Skills :

Strong collaboration across engineering, security, and partner teams.

Excellent troubleshooting and problem-solving under pressure.

Rajkumar Renganathan

Quess Selection & Services, Singapore

EA License Number : 23C2060 Registration ID is R1983662

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This is in partnership with the 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 Quesscorp Singapore’s PDPA and e2i’s PDPA