Senior Software Engineer (.NET / C# / Python)

Michael Bailey Associates; Brussel Hoofdstad; Hybride; EUR 70 000 - 95 000; Plein temps

Résumé du poste

Michael Bailey Associates is seeking a Senior Software Engineer to maintain and evolve a complex platform using .NET/C# and Python. The role requires SQL Server and PostgreSQL expertise, plus Docker and messaging systems, with French and English language skills. Brussels-based with a hybrid setup (3–4 days onsite).

Start ASAP on a 6‑month contract with strong extension potential (12–24 months). You will own features, fix production issues, improve performance and contribute to architecture in a

Qualifications

• >> Senior-level software engineer with experience in .NET/C#/Python.
• 2) Proficient in SQL Server and PostgreSQL.
• 3) Strong knowledge of Docker and messaging with ActiveMQ.
• 4) Familiar with GitHub and CI/CD pipelines.
• 5) Fluent in French and English.
• 6) Ability to work independently and own tasks.
• 7) Thrive in evolving environments with changing priorities.
• 8) Interest in AI and emerging technologies.

Responsabilités

• Maintain, support and improve a complex software platform.
• Investigate production issues and perform root cause analysis.
• Optimize application performance, stability and reliability.
• Develop new features and enhance existing functionality.
• Work across application, database and integration layers.
• Build and maintain APIs and system integrations.
• Support CI/CD processes and deployment activities.
• Produce technical documentation and share knowledge within the team.
• Contribute ideas for improving architecture, automation and operational efficiency.

Connaissances

C# / .NET

Python

SQL Server

PostgreSQL

Docker

ActiveMQ

CI/CD

French

English

Independent / ownership

Outils

GitHub

Description du poste

Senior Software Engineer (.NET / C# / Python) / French & English speaking

Location: Brussels (Hybrid - 3-4 days onsite per week)

Contract: Initial 6-month contract with strong extension potential (12-24 months)

Start: ASAP (September start possible, but no later than mid-September)

Languages: French and English

We are looking for an experienced Senior Software Engineer (.NET / C# / Python) to join a team responsible for maintaining, improving and evolving a complex, business-critical software platform.

This is an excellent opportunity for someone who enjoys solving technical challenges, improving system performance and taking ownership of a mature platform that requires continuous enhancement.

This role is ideal for someone who thrives in an environment where every day brings different technical challenges. You'll be responsible for keeping systems stable, resolving production issues, improving performance and contributing to future enhancements.

Tasks:

• Maintain, support and continuously improve a complex software platform
• Investigate production issues, perform root cause analysis and implement permanent solutions
• Optimise application performance, stability and reliability
• Develop new features and enhance existing functionality
• Work across application, database and integration layers
• Build and maintain APIs and system integrations
• Support CI/CD processes and deployment activities
• Produce clear technical documentation and share knowledge within the team
• Contribute ideas for improving architecture, automation and operational efficiency

Skills:

• Strong experience with C# / .NET
• SQL Server and PostgreSQL
• Docker
• Apache ActiveMQ (or similar messaging technologies)
• GitHub and CI/CD pipelines
• Works independently and takes ownership
• Enjoys investigating problems and finding solutions without needing constant direction
• Has a proactive, hands-on mindset
• Likes improving existing systems rather than only building new ones
• Is comfortable working in an evolving environment where priorities can change
• Enjoys technical challenges and continuous improvement
• Has an entrepreneurial approach and naturally takes initiativeHas an interest in AI and emerging technologies

If you enjoy solving difficult technical problems, improving existing systems and taking ownership of mission-critical applications, we'd love to hear from you.