Senior/Lead Back End Engineer

RemoFirst
Canton de Saint-Mihiel, France
yesterday

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Working hours
Regular working hours
Languages
English
Experience level
Senior

Job location

Remote
Canton de Saint-Mihiel, France

Tech stack

Java
Amazon Web Services (AWS)
Unit Testing
Cloud Computing
Code Review
Relational Databases
Software Debugging
Software Design Patterns
Distributed Systems
Django
Python
PostgreSQL
MySQL
NoSQL
Object-Oriented Software Development
Migration Manager
Test Driven Development
Flask
Spring-boot
Reliability of Systems
Backend
GIT
FastAPI
Integration Tests
Solid Principles
REST
Web Api
Microservices

Job description

  • Design, develop, and maintain backend services using Python and Java.
  • Support and contribute to the gradual migration from Python-based services to Java, ensuring stability and continuityBuild and maintain RESTful APIs and backend integrations.
  • Participate in system design and architectural discussions, especially around service boundaries and migration strategy.
  • Work with distributed systems and microservices.
  • Integrate with third-party services and external APIs.
  • Write clean, well-tested, and maintainable code following best practices.
  • Participate in code reviews, technical discussions, and knowledge sharing.
  • Debug production issues and improve system reliability, observability, and performance.
  • Collaborate effectively with cross-functional teams across time zones.

Requirements

Do you have experience in Unit testing?, * 5+ years of backend software development experience

  • Strong professional experience with Python (Django, FastAPI, Flask, or similar frameworks)
  • Strong professional experience with Java, preferably using Spring Boot.
  • Solid understanding of object-oriented design, SOLID principles, and design patterns
  • Experience designing and consuming RESTful APIs
  • Experience with relational databases (PostgreSQL, MySQL); exposure to NoSQL databases is a plus
  • Familiarity with unit testing, integration testing, and test-driven development (TDD)
  • Experience with CI/CD pipelines, Git, and modern development workflows
  • Understanding of microservices architecture and distributed systems
  • Experience working with cloud platforms (AWS preferred)
  • Strong problem-solving skills and attention to performance and scalability
  • Excellent written and verbal communication skills in English

Benefits & conditions

  • Fully remote role
  • Opportunity to work on global-scale systems and products
  • Exposure to international teams and modern engineering practices
  • High ownership and autonomy in a fast-growing startup environment
  • A strong culture grounded in speed, ownership, trust, transparency, customer obsession, and excellence.
  • Real problems, global impact, and the chance to help redefine how the world works.

Apply for this position