Job Description: Job Description Backend Developer (Java / Spring / AWS) Job Title: Backend Developer Java, Reactive Spring, AWS

Experience: 4+ years of hands-on backend engineering, including 1+ years building cloud-native, event-driven services on AWS.

Job Summary

We are seeking an experienced Backend Developer to build and scale the services behind our Agile Service Options (DSO) platform. You will work across two Java + Spring Boot (WebFlux) codebases.

Both are fully reactive, event-driven systems on R2DBC/PostgreSQL, AWS Lambda, SQS and ECS Fargate, sharing a multi-module Gradle structure, OpenAPI-first APIs, Flyway-managed schemas, OpenTelemetry tracing and CloudFormation-driven deployments.

The ideal candidate is fluent in non-blocking reactive programming with Project Reactor, comfortable owning a feature end-to-end (API async job database infrastructure dashboard), and holds a high bar for testing, observability and secure-by-default design.

Key Responsibilities

• Design, build and maintain reactive REST APIs using Spring Boot WebFlux,



returning Mono/Flux end-to-end with no blocking calls anywhere in the request path.

• Design OpenAPI-first APIs: generated specs, standardized response envelopes and error models, spec linting in the pipeline, and consistent HTTP semantics

• Integrate with external systems Snowflake (REST API with JWT key-pair auth and long-running query polling), internal product/entitlement services, and AWS services (S3, Secrets Manager, DynamoDB) via async SDK clients.

• Implement caching and performance strategies (Caffeine in-memory/Redis caches with TTLs, query tuning, parallel composition with Mono.zip) for high-volume ingestion and reporting workloads.

• Instrument services with OpenTelemetry / AWS Distro for OpenTelemetry (ADOT): custom spans, trace-context propagation across HTTP and SQS boundaries, structured logging, and RED metrics surfaced in CloudWatch Application Signals, X-Ray and Grafana dashboards.

• Write un

📌 Java Aws Developer (Chennai)
🏢 IDC Engineering India
📍 Chennai