Senior Java Backend Engineer - API Integrations & Cloud

3shool Technology Consultants; United States; Remote; USD 16,000 - 22,000; Full time

Job summary

3shool Technology Consultants is seeking a Senior Java Backend Developer to design and deliver scalable backend services and partner-facing integrations. You will work with Java 17/21, Spring Boot, Python and REST APIs to build robust integrations and maintain databases such as PostgreSQL and MySQL.

The role emphasizes API documentation with OpenAPI/Swagger, containerized deployments using Docker and orchestration with AWS ECS or Kubernetes, plus collaboration with product teams on integration

Qualifications

• 5+ years backend software development experience.
• Strong hands-on experience with Java 17/21, Spring Boot and Maven.
• Strong Python experience with Flask, SQLAlchemy, Alembic, Pydantic or Marshmallow.
• Strong experience with REST APIs and third-party integrations.
• Experience with webhooks, authentication, pagination, retries and error handling.
• Good knowledge of PostgreSQL and MySQL.
• Experience with Docker and AWS ECS or Kubernetes.
• Experience with OpenAPI, Swagger, springdoc or Flasgger.
• Experience with Go is an advantage.

Responsibilities

• Develop and enhance backend services using Java 17/21, Spring Boot and Maven.
• Build and maintain third-party API integrations and integration gateways.
• Design reliable API integrations with authentication, retries, idempotency, webhooks, pagination and failure handling.
• Develop and maintain Python-based backend services.
• Work with PostgreSQL and MySQL databases.
• Create and maintain API documentation using OpenAPI / Swagger / springdoc.
• Deploy and support services using Docker and AWS ECS/Kubernetes.
• Collaborate with engineering and product teams on integration requirements and production issues.

Skills

Java

Spring Boot

Maven

Python

REST API

PostgreSQL

MySQL

Docker

AWS ECS

Kubernetes

OpenAPI

Swagger

Go

Job description

3shool Technology Consultants is seeking a Senior Java Backend Developer to design and deliver scalable backend services and partner-facing integrations. You will work with Java 17/21, Spring Boot, Python and REST APIs to build robust integrations and maintain databases such as PostgreSQL and MySQL.

The role emphasizes API documentation with OpenAPI/Swagger, containerized deployments using Docker and orchestration with AWS ECS or Kubernetes, plus collaboration with product teams on integration