Senior Java Developer

BoostHire LLC; France; Hybrid; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Competitive salary

Equity options

Performance bonuses

Learning budgets

Conference passes

Clear growth tracks

Generous time off

Remote-first culture

Job summary

BoostHire LLC is seeking a Senior Java Developer to join the backend team and build scalable services for core fintech products. You will design APIs, work on secure payments, and collaborate with DevOps and frontend teams to deliver end-to-end features.

You will contribute to system design, write clean code, and stay ahead of Java best practices. The role emphasizes performance, security, and a proactive, autonomous approach.

Qualifications

• 5+ years of backend development with strong Java (Java 11+) expertise.
• Solid grasp of Spring Boot, REST APIs, and microservices architecture.
• Familiar with SQL (PostgreSQL preferred) and messaging systems like Kafka or RabbitMQ.
• Experience with CI/CD, containerization (Docker), and cloud platforms (AWS/GCP).
• Passion for performance, security, and clean architecture.
• A team player who’s also self-driven and proactive in solving problems.

Responsibilities

• Build and optimize scalable Java microservices powering our core fintech products.
• Design APIs and backend workflows for secure payments, account management, and financial data.
• Collaborate with DevOps and frontend teams to deliver smooth, reliable end-to-end features.
• Contribute to system design decisions and architectural improvements.
• Write clean, testable, well-documented code — and help set coding standards for the team.
• Investigate and resolve performance bottlenecks and production issues.
• Stay current on Java best practices and fintech trends.

Skills

Java (Java 11+)

Spring Boot

REST APIs

Microservices architecture

SQL PostgreSQL

Messaging systems

CI/CD

Docker

Cloud platforms (AWS/GCP)

OpenAPI/OAuth2

Tools

Docker

Job description

In a world where financial systems are too often outdated, we’re building the infrastructure that makes modern finance feel seamless. We power high-volume, low-latency transactions that help users move, invest, and understand their money — fast and securely.

We’re looking for a Senior Java Developer to join our backend team and build resilient services that scale. You'll work on mission-critical systems with a team that values clarity, performance, and code you’re proud to maintain.

What you’ll do

Build and optimize scalable Java microservices powering our core fintech products

Design APIs and backend workflows for secure payments, account management, and financial data

Collaborate with DevOps and frontend teams to deliver smooth, reliable end-to-end features

Contribute to system design decisions and architectural improvements

Write clean, testable, well-documented code — and help set coding standards for the team

Investigate and resolve performance bottlenecks and production issues

Stay current on Java best practices and fintech trends

Requirements

Who you are

5+ years of experience in backend development with strong Java (Java 11+) expertise

Solid grasp of Spring Boot, REST APIs, and microservices architecture

Familiar with SQL (PostgreSQL preferred) and messaging systems like Kafka or RabbitMQ

Experience with CI/CD, containerization (Docker), and cloud platforms (AWS/GCP)

Passion for performance, security, and clean architecture

A team player who’s also self-driven and proactive in solving problems

Nice to have

Experience in fintech or regulated environments

Knowledge of OpenAPI, OAuth2, or distributed systems

Contributions to open-source projects or internal developer tools

Work on systems that handle real money at real scale

Smart, humble teammates and zero micromanagement

Competitive salary, equity options, and performance bonuses

Remote-first culture, flexible hours, and generous time off

Learning budgets, conference passes, and clear growth tracks