Senior Integration Engineer (Java+Python)

Mantras2Success; Ahmedabad District; On-site; INR 2,500,000 - 4,000,000; Full time

Job summary

Mantras2Success in Gujarat seeks a Senior Integration Engineer to design and build reliable, scalable integration services using Java 17+ and Python 3.11+. The role focuses on microservices, API and event-driven integrations, AWS, observability, CI/CD, and technical leadership.

You will design and develop integration microservices, apply patterns, build REST/gRPC, manage containers with Docker on AWS, and ensure security and quality through tests and ADRs.

Qualifications

• Expert hands‑on experience with Java 17+ and Spring Boot 3 / Spring Cloud.
• Strong hands‑on experience with Python 3.11+ and FastAPI.
• Strong knowledge of Spring Security 6, OAuth2, JWT, OIDC, and API security.
• Hands‑on experience with RabbitMQ or SQS/SNS and event‑driven architecture.
• Strong understanding of microservice design patterns and idempotency.
• Hands‑on experience with Docker and Kubernetes/EKS.
• Hands‑on AWS experience with ECS/EKS, Lambda, API Gateway, S3, IAM, and RDS.
• Hands‑on experience with ELK and Zipkin tracing.
• Strong experience with Bitbucket and Jenkins.
• Strong SQL and database knowledge.

Responsibilities

• Design and develop integration microservices using Java 17+ with Spring Boot 3 or Python 3.11+ with FastAPI.
• Apply microservice patterns including Saga, Circuit Breaker, Retry with backoff/jitter, Bulkhead, Transactional Outbox, CQRS, Strangler Fig, and idempotent consumers.
• Develop synchronous and asynchronous integrations using REST, gRPC, RabbitMQ, SQS/SNS, and webhooks.
• Work with API contracts using OpenAPI and AsyncAPI.
• Build and deploy containerised services using Docker on AWS, including ECS/EKS, Lambda, API Gateway, RDS, S3, Secrets Manager, ECR, and IAM.
• Implement observability using Elasticsearch, Logstash, Kibana (ELK), Zipkin, Micrometre Tracing/Brave, and correlation IDs.
• Own CI/CD pipelines using Bitbucket and Jenkins, including quality gates, deployment, and rollback.
• Develop secure services using Spring Security 6, OAuth2, JWT, OIDC, mTLS, FastAPI security, and OWASP API Security Top 10.
• Work with async Python technologies including asyncio, Pydantic v2, httpx, aio-pika, aioboto3, Celery, and tenacity.
• Write unit, integration, and contract tests using JUnit 5, Mockito, Testcontainers, pytest, and Pact.
• Contribute to design documents, ADRs, code reviews, mentoring, and technical discussions.

Skills

Java 17+

Spring Boot 3 / Spring Cloud

Python 3.11+

API design & integration patterns

Microservices architecture

OpenAPI / AsyncAPI

Security: OAuth2, JWT, OIDC

RabbitMQ / SQS/SNS

Docker / Kubernetes

AWS experience (ECS/EKS, Lambda)

ELK / Zipkin tracing

CI/CD (Bitbucket, Jenkins)

SQL & databases

Tools

Docker

Kubernetes / EKS

AWS

FastAPI

OpenAPI / AsyncAPI

Jenkins / Bitbucket

ELK

Job description

ABOUT THE ROLE:

We are looking for a Senior Integration Engineer to design and develop reliable, scalable, and secure integration services using Java 17+ and Python. The role will involve microservices, API and event-driven integrations, AWS, observability, CI/CD, and technical leadership.

KEY RESPONSIBILITIES:

• Design and develop integration microservices using Java 17+ with Spring Boot 3 or Python 3.11+ with FastAPI.
• Apply microservice patterns including Saga, Circuit Breaker, Retry with backoff/jitter, Bulkhead, Transactional Outbox, CQRS, Strangler Fig, and idempotent consumers.
• Develop synchronous and asynchronous integrations using REST, gRPC, RabbitMQ, SQS/SNS, and webhooks.
• Work with API contracts using OpenAPI and AsyncAPI.
• Build and deploy containerised services using Docker on AWS, including ECS/EKS, Lambda, API Gateway, RDS, S3, Secrets Manager, ECR, and IAM.
• Implement observability using Elasticsearch, Logstash, Kibana (ELK), Zipkin, Micrometre Tracing/Brave, and correlation IDs.
• Own CI/CD pipelines using Bitbucket and Jenkins, including quality gates, deployment, and rollback.
• Develop secure services using Spring Security 6, OAuth2, JWT, OIDC, mTLS, FastAPI security, and OWASP API Security Top 10.
• Work with async Python technologies including asyncio, Pydantic v2, httpx, aio-pika, aioboto3, Celery, and tenacity.
• Write unit, integration, and contract tests using JUnit 5, Mockito, Testcontainers, pytest, and Pact.
• Contribute to design documents, ADRs, code reviews, mentoring, and technical discussions.

REQUIRED SKILLS:

• Expert hands‑on experience with Java 17+ and Spring Boot 3 / Spring Cloud.
• Strong hands‑on experience with Python 3.11+ and FastAPI.
• Strong knowledge of Spring Security 6, OAuth2, JWT, OIDC, and API security.
• Hands‑on experience with RabbitMQ or SQS/SNS and event‑driven architecture.
• Strong understanding of microservice design patterns and idempotency.
• Hands‑on experience with Docker and Kubernetes/EKS.
• Hands‑on AWS experience with ECS/EKS, Lambda, API Gateway, SQS/SNS, RDS, S3, IAM, and ECR.
• Hands‑on experience with ELK and Zipkin tracing.
• Strong experience with Bitbucket and Jenkins.
• Strong SQL and database knowledge.

GOOD TO HAVE:

• PostgreSQL/MySQL, Redis, MongoDB/DynamoDB.
• Terraform or CloudFormation.
• SOAP/XML, SFTP, CSV/EDI integrations.
• Webhook security including HMAC, rate limiting, replay protection, and idempotency.
• Flyway/Liquibase, Alembic, Redis caching.
• SonarQube, OWASP Dependency-Check, Snyk, Trivy.
• Apache Camel / Spring Integration / iPaaS.
• AI-assisted development using Copilot/Claude and LLM API integrations.