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Integration Developer (Node.js, TypeScript on AWS)

Zensar
Bengaluru, IND
Mid · 5–8 years experience
Onsite
Discovered 1 weeks ago
awscloudwatchdockerdynamodbecsgit

Full Job Posting

Qualifications

  • Required Skills & Competencies • Strong hands-on Node.js and TypeScript backend development, including Fastify (or a similar framework), asynchronous programming, REST/JSON APIs, validation and structured error handling. • Working experience with AWS SDK integrations: DynamoDB, Secrets Manager, SQS/DLQ, and containerised deployment to ECS Fargate. • Practical AI-assisted application development using an approved coding assistant: supplying contract context, iterating on generated code and verifying correctness with tests. • API integration and transformation, legacy contract compatibility, token-based authentication and configuration-driven business mappings. • Unit, API and contract-test development; Git-based peer review, CI/CD integration and production debugging using logs and distributed traces. Idempotency, retry safety, timeout handling, circuit breakers and secure handling of credentials and personal data. Good-to-Have • AWS AppConfig, EventBridge, OpenTelemetry/ADOT, CloudWatch and X-Ray • Jest or an equivalent TypeScript testing framework; Docker • Java / Spring Boot exposure Qualifications • 5–8 years of relevant software development experience, including hands-on backend/API integration delivery. • B.E./B.Tech/MCA or equivalent
  • Required Skills & Competencies
  • Strong hands-on Node.js and TypeScript backend development, including Fastify (or a similar framework), asynchronous programming, REST/JSON APIs, validation and structured error handling.
  • Working experience with AWS SDK integrations: DynamoDB, Secrets Manager, SQS/DLQ, and containerised deployment to ECS Fargate.
  • Practical AI-assisted application development using an approved coding assistant: supplying contract context, iterating on generated code and verifying correctness with tests.
  • API integration and transformation, legacy contract compatibility, token-based authentication and configuration-driven business mappings.
  • Unit, API and contract-test development; Git-based peer review, CI/CD integration and production debugging using logs and distributed traces.
  • Idempotency, retry safety, timeout handling, circuit breakers and secure handling of credentials and personal data.
  • Good-to-Have
  • AWS AppConfig, EventBridge, OpenTelemetry/ADOT, CloudWatch and X-Ray
  • Jest or an equivalent TypeScript testing framework; Docker
  • Java / Spring Boot exposure
  • 5–8 years of relevant software development experience, including hands-on backend/API integration delivery.
  • B.E./B.Tech/MCA or equivalent

Responsibilities

  • Develop REST APIs in Node.js/TypeScript (Fastify or similar) to OpenAPI specifications, with request validation and structured error handling. • Implement legacy auth/token emulation and request/response transformation for the backward-compatible API, without requiring consumer payload changes. • Build configuration-driven campaign, field and error-code mappings using AWS AppConfig, supporting publisher and regional variants. • Integrate securely with third-party email provider APIs using Secrets Manager credentials; implement safe error handling and PII-aware structured logging. • Build idempotency with DynamoDB conditional writes, bounded timeouts, retry/backoff, circuit breaker and SQS/DLQ recovery, without changing the agreed API contract. • Write audit records, publish events to EventBridge and propagate correlation IDs for end-to-end tracing. • Use approved AI coding assistants to build mapping code, API specifications, unit tests and contract tests from sanitised discovery artefacts; review and correct every generated change. • Support SIT, UAT, cutover and post-release stabilisation, including defect fixes and tuning.
  • Develop REST APIs in Node.js/TypeScript (Fastify or similar) to OpenAPI specifications, with request validation and structured error handling.
  • Implement legacy auth/token emulation and request/response transformation for the backward-compatible API, without requiring consumer payload changes.
  • Build configuration-driven campaign, field and error-code mappings using AWS AppConfig, supporting publisher and regional variants.
  • Integrate securely with third-party email provider APIs using Secrets Manager credentials; implement safe error handling and PII-aware structured logging.
  • Build idempotency with DynamoDB conditional writes, bounded timeouts, retry/backoff, circuit breaker and SQS/DLQ recovery, without changing the agreed API contract.
  • Write audit records, publish events to EventBridge and propagate correlation IDs for end-to-end tracing.
  • Use approved AI coding assistants to build mapping code, API specifications, unit tests and contract tests from sanitised discovery artefacts; review and correct every generated change.
  • Support SIT, UAT, cutover and post-release stabilisation, including defect fixes and tuning.

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