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
• Solid 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.
• Strong 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