Senior API Gateway Engineer - Axway / Java

Helius Technologies; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Helius Technologies seeks a Senior API Gateway Engineer with strong hands-on Java, Axway API Gateway expertise, and enterprise API security focus. You will design, develop, deploy, and support scalable API and integration solutions in a large-scale environment.

Responsibilities include configuring Axway Gateway, Policy Studio, API Manager, and FED deployments; implementing OAuth 2.0, JWT, TLS/mTLS; and ensuring secure, reliable API performance with DevOps collaboration.

Qualifications

• 6+ years of experience in Java development and API technologies.
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Responsibilities

• Design, develop, and support enterprise APIs and integration solutions.

Skills

Java

APIs

Axway API Gateway

OAuth 2.0

JWT

REST API

CI/CD

Maven

Git

Security

Tools

Policy Studio

API Manager

FED deployments

Job description

Senior API Gateway Engineer - Axway / Java

We are looking for an experienced Senior API Gateway Engineer with strong hands-on expertise in Java, enterprise APIs, Axway API Gateway, and API security.

This role will focus on the design, development, deployment, security, and production support of enterprise APIs and integration solutions in a large-scale environment.

Key Responsibilities

• Design, develop, enhance, and support enterprise APIs and integration solutions.
• Configure and maintain Axway API Gateway , including policies, routing, security controls, and API lifecycle components.
• Work extensively with Axway Policy Studio, API Manager, and .FED deployments .
• Develop and support Java-based microservices and REST APIs .
• Implement API authentication, authorization, encryption, and security controls.
• Configure and manage OAuth 2.0 flows including:Client CredentialsAuthorization CodeJWT BearerRefresh Token
• Implement and support JWT token generation, validation, claims handling, signing, and encryption .
• Manage PGP encryption/decryption, digital signatures, key management, and certificate handling .
• Support SSL/TLS, mTLS, PKI, OpenID Connect, and API threat protection .
• Perform root cause analysis, troubleshooting, and incident resolution for API and gateway-related issues.
• Support API deployments, change activities, governance, and lifecycle management.
• Work closely with application, infrastructure, cybersecurity, architecture, and DevOps teams.
• Support performance tuning, monitoring, and continuous improvement of API platforms.

Requirements

• 6+ years of experience in Java development and API technologies .
• Strong hands-on experience with: Axway API GatewayPolicy StudioAPI Manager.FED deployments
• Strong proficiency in: JavaMicroservicesREST APIsMavenGit / BitbucketCI/CD pipelines
• Strong experience across the full API lifecycle including design, development, deployment, production support, and troubleshooting .
• Deep understanding of OAuth 2.0 and enterprise API security.
• Strong knowledge of JWT, PGP, SSL/TLS, mTLS, PKI, OAuth, OpenID Connect .
• Experience implementing security policies in Axway API Gateway .
• Good understanding of OWASP API Security Top 10 and secure API design principles.
• Strong troubleshooting, incident management, and root cause analysis skills.