Java Software Engineer

Location:

Region: Flemish Brabant
Country: Belgium

Role:

  • Industry: Technology
  • Job Type: Contract / Freelance
Rate: Negotiable

Application Details:

Start Date: ASAP
Expiry Date: 14/08/2025
Job Reference: SAJSE_1752742237

Java Software Engineer

💻 Freelance Java Backend Engineer - Spring Boot | Hybrid Belgium

📍 Location: Belgium (Hybrid - 2 days/week onsite)

📅 Start: ASAP

📆 Contract: 6-month rolling (multi-year scope)

🇪🇺 EU work permit required

🔍 Overview

An established European product company is seeking a freelance Java backend engineer to join one of their core agile feature teams. The business operates in the data-heavy B2B space and is investing heavily in backend scalability, performance, and modular architecture.

This role is ideal for a medior to senior Java engineer who enjoys backend craftsmanship, agile delivery, and contributing to scalable real-world platforms. Expect a clean, modern stack, a professional team culture, and real runway for contract longevity.

🛠 Responsibilities

  • Design, develop, and maintain backend microservices using Java + Spring Boot
  • Collaborate closely with engineers, product owners, and team leads in a Scrum-based workflow
  • Implement clean architecture principles (SOLID, DDD, TDD)
  • Work across APIs, data layers, and system integrations
  • Contribute to platform stability, performance, and maintainability
  • Participate in technical design and team code quality improvements

✅ Required Skills

  • 5 years backend experience with Java (8+ ideal), Spring Boot framework
  • Solid grasp of software engineering best practices and architectural patterns
  • Strong SQL + relational database experience (e.g. PostgreSQL)
  • Experience with REST APIs and containerised development workflows
  • Familiarity with Git, CI/CD pipelines, and Agile team delivery
  • Fluent English communication in cross-functional setups
  • Experience with data analytics systems and timeseries workflows
  • Clean code practices TDD, SOLID and DDD

🌟 Bonus (Not Mandatory)

  • Familiarity with containerisation and deployment
  • Angular familiarity
  • Dutch language skills (not required)
  • Experience with real time streaming, or EDD (event-driven design)

🎯 Why Consider This Role?

  • Join a contractor-friendly team building a real product used globally
  • 6-month rolling contract with multi-year visibility
  • Work with high-quality engineers in a structured agile environment
  • Remote-first setup (just 2x per week on-site in Belgium)
  • Mid-market rates with senior uplift flexibility

g2 Recruitment are committed to equality of opportunity for all applications from individuals are encouraged regardless of age, disability, sex, gender reassignment, sexual orientation, pregnancy and maternity, race, religion or belief and marriage and civil partnerships or any other characteristic protected by law.

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L&D Team

We are very lucky that g2 recruitment see Learning and Development as a vital part of a consultants journey which is why we have 4 people in the team who you will work very closely with from day 1 in your career. The team are on hand to guide you through your career at all levels and provide extra support working closely with the management team to give all consultants the best chance of success.  

Our Three Pillars of Training

Academy:
Week 1 is a series of remote sessions to learn all things systems, followed by a 1 week academy process which is a mixture of classroom and deskside this will be in one of our UK offices and usually consists of 3-8 other consultants all starting their journey together.

Experienced Modules:
These are a variety of sessions curated by us designed to support consultants as they are progressing through the career ladder, the aim is to ensure consultants at all levels have access to L&D.

Junior Management Programme:
Ran by our head of L&D this programme is designed to support junior managers as they start their management career. This involves things like personal branding, time management and ends in a business plan which is presented to members of the Exec board and senior management team.

Jaz123
Jaz D’Avola
Head of Learning & Development

Jaz joined g2 Recruitment in 2013.

She now leads our Learning and Development programme, transferring the knowledge and wisdom she learnt as a recruiter to the new generation of talent.

Imani
Imani WIlliams
Learning and Development Consultant

Imani joined g2 Recruitment in 2022.

His role involves developing individuals in all areas of the business, varying from inducting and onboarding consultants to working with them 1 to 1 to identify areas of development.  He aids with growth of L&D across the business, watching consultants experience and develop.

Meghan1
Meghan Mcloughlin
Learning and Development Consultant

Meghan joined g2 in 2023 as an L&D consultant, Working in recruitment for 6 years, her role is to  help consultants at all levels to upskill and focus on development points. This could be anything from sales calls or candidate calls to organisation improvements.

Kane Gray
Systems & Academy Trainer

Kane joined g2 in April 2023 as an Academy & Systems Trainer.

His role involves teaching the consultants that are new to the company the foundations of recruitment and our systems before then helping them to upskill in areas specific to each consultant. Working closely with different consultants and watching them implement the feedback, apply it, and then benefit off the back of it.

Candidates

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Clients

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