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Lead Developer

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Onsite

Lead Developer

E-Resourcing Belgium BV

Lead Developer

Skills

SQL QueriesDocker.NETPostgreSQLRabbitMQGraphQLData AnalysisAIElasticsearchGitHubKubernetesAzure

8 days ago

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Important information


Contract type:

Freelance / Contract

Location:

Brussels, Belgium

Work mode:

Onsite

Published on:

14 October 2026

What they need


We are looking for an experienced Senior Developer / Tech Lead. In this role, you will work on challenging projects using the latest technologies and serve as a key link in the development and optimization of our software products.

What will you be doing?

• You set the technical standard: you oversee code quality, conduct reviews, and provide technical coaching to developers.

• You translate business and domain requirements into clear technical analyses and specifications.

• You contribute to the development of a scalable business platform based on .NET and Azure.

• You work in an AI-native environment. Agents write, test, and refactor code, while you oversee the architecture, security, and quality of their output.

Essential knowledge and experience:

• Azure: Experience with Azure services and cloud-based infrastructures.

• .NET: Thorough knowledge of .NET and experience with application development.

• DevOps, Kubernetes & Docker: Experience with CI/CD pipelines, containerization, and implementing a DevOps culture.

• Angular: Knowledge of frontend development using Angular.

• AI coding tools: Experience with tools such as Claude Code and GitHub Copilot in real-world projects, and the ability to critically evaluate their output.

• Tech lead: Experience with code reviews, technical coaching, and technical analysis.

Desired additional technologies:

• Marten: Experience with Marten for event sourcing and managing document-oriented data in .NET.

• GraphQL: Experience with API design and optimization.

• PostgreSQL: Experience with document databases and SQL.

• RabbitMQ & MassTransit: Experience with message-based systems and event-driven architecture.

• Domain-Driven Design (DDD): Knowledge of and experience applying DDD principles to build scalable and well-structured applications.

• Elasticsearch: Experience implementing and using Elasticsearch for search functionality and data analysis.

• Certifications: AZ-204 and AZ-400 are a nice-to-have.

What are we looking for?

• Problem-solving skills: You have the drive and insight to solve complex problems quickly and efficiently.

• Resilience under pressure: You handle chaos and pressure well without losing focus.

• Proactive: You don’t wait around; instead, you think ahead and propose improvements.

• Eagerness to learn: You have a passion for technology and are committed to continuous self-development.

• Team player: You collaborate effectively with other developers but are also capable of working independently. You enjoy sharing knowledge and helping to elevate the team’s technical capabilities.

• Languages: Dutch (must have), English & French (nice to have)

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