About the Role We are seeking an experienced Senior API Developer to design, build, and optimize high-performance microservices and APIs that support an enterprise platform. In this role, you will own the full-service lifecycle, from contract-first API design through production deployment and observability, while working within an AWS-native ecosystem and supporting API consumer experience through MuleSoft.

Job Title Senior API Developer.

Responsibilities: Design, develop, and maintain production-grade GraphQL, RESTful, and event-driven APIs using Go. Apply clean architecture, domain-driven design, and twelve-factor principles in service development. Decompose monolithic capabilities into well-bounded microservices with clearly defined API contracts using OpenAPI 3.x and AsyncAPI.

Implement resilience patterns such as circuit breakers, retries with exponential back-off, bulkheads, timeouts, and graceful degradation to support high service availability. Build idiomatic Go code with comprehensive unit, integration, and contract tests. Design and implement database access layers for PostgreSQL, MongoDB Atlas, DynamoDB, and Redis.

Apply connection pooling, query optimization, and caching strategies to improve performance. Support the deployment of containerized microservices on AWS ECS using Fargate launch types. Review task definitions, service auto-scaling policies, and target-group health checks.

Support the configuration of Application Load Balancers and Network Load Balancers with path-based routing, SSL and TLS termination, and sticky sessions as needed.



Instrument distributed tracing with AWS X-Ray and create CloudWatch dashboards, metrics, alarms, and Logs Insights queries for operational visibility. Use CloudTrail for API-level audit logging and compliance reporting across AWS accounts.

Manage encryption at rest and in transit using AWS KMS and integrate with Secrets Manager for credential lifecycle management. Utilize AWS services such as S3, SQS, SNS, EventBridge, IAM, VPC, and WAF as needed. Support the full API lifecycle through MuleSoft Anypoint Platform, including API specification design, publishing to Exchange, proxy creation, and runtime policy application.

Monitor API consumer analytics, SLA tiers, and usage quotas, and resolve integration issues proactively. Enforce API standards, including naming conventions, versioning strategy, pagination patterns, error-response schemas, and HATEOAS where applicable. Maintain API portal documentation and developer onboarding guides for internal and external consumers.

Support CI and CD pipelines in Azure DevOps, including build, lint, test, SAST scanning, container image build and push, and multi-stage deployment.

Nice to have: Design and implement AI-ready APIs.

Required Skills: Strong experience in Go development. Hands-on experience with GraphQL, RESTful APIs,



and event-driven architectures. Strong understanding of microservices architecture and API contract design.

Experience with clean architecture, domain-driven design, and twelve-factor application principles.

Experience implementing resilience and fault-tolerance patterns. Strong testing experience, including unit, integration, and contract testing.

Experience with PostgreSQL, MongoDB Atlas, DynamoDB, and Redis.

Experience with AWS services, including ECS, ALB, NLB, X-Ray, CloudWatch, CloudTrail, KMS, Secrets Manager, S3, SQS, SNS, EventBridge, IAM, VPC, and WAF.

Experience with API governance, versioning, documentation, and consumer support.

Experience with CI and CD pipelines and DevOps practices. Working knowledge of MuleSoft Anypoint Platform. Robust understanding of secure API design and operational best practices.

Desirable Skills: Experience with AI-ready API design and implementation.

Experience with OpenAPI 3.x and AsyncAPI.

Experience with RAML and API proxy management in MuleSoft.

Experience with Azure DevOps.

Experience with container image management and multi-stage deployments.

Experience with observability, monitoring, and compliance reporting in cloud environments.

Experience with API analytics, SLA management, and quota enforcement.

Education Qualification: Bachelor’s degree in computer science, Information Technology, Software Engineering, or a related field. Equivalent practical experience in API development, microservices, or cloud engineering may also be considered.

📌 GoLang API Developer (Bengaluru)
🏢 Ascendion
📍 Bengaluru