JC0029 - Developer

Sentior, Ltd.; Brussel Hoofdstad; Hybrid; EUR 83,000 - 124,000; Full time

Job summary

Proximus is seeking an AI Software Engineer to support the evolution of its internal AI platform. This hybrid Brussels-based contractor role runs for 3 months, 40 hours per week, starting soon.

You will translate business needs into requirements, develop and validate solutions, onboard users, and drive adoption of AI capabilities across teams. Strong Python/TypeScript and AI tooling experience is required.

Qualifications

• Good understanding of LLM harnesses and agent workflows.
• CI/CD pipelines and cloud tooling (Azure) awareness.
• Development experience with Python and TypeScript.

Responsibilities

• Develop and validate AI platform functionalities and features.
• Onboard users and teams to new AI capabilities and workflows.
• Facilitate demonstrations, workshops, and hands-on sessions.
• Support adoption and effective use of AI assistants, skills, and workspaces.
• Maintain documentation and traceability from business need to delivered solution.

Skills

Python

TypeScript

CI/CD

Azure

Kubernetes

OpenAI

RAG

LLM harnesses

Agile

MCP

Tools

Terraform

FastAPI

MCP

Job description

# JC0029 - DeveloperProximus Brussel 3 maandenGepubliceerd 2 uur geleden · Opportunity ID: 1064173Tarief indicatie —Uren 40 u/wStart 30 Nov 2026Duur 3 maandenInteresse in deze opdracht?## De opdrachtFreelancer OpportunityJob title: AI Software EngineerJob location: Brussels, Belgium Hybrid (At least 40% including one day per week on site in Brussels)Job Contract: Contractor assignment, starting for 3 months, potentially extendableJob weekly hours: 40 hrs./weekMissionSupport the evolution and adoption of the internal AI platform of the Design & Value Streams Acceleration department.As a full-stack AI software engineer, you translate business needs into clear requirements, user stories, and acceptance criteria. You develop and validate proposed solutions with stakeholders, onboard and support users to drive adoption, and provide implementation guidance.The internal AI platform supports designers, marketers, communicators, product teams, agile coaches, scrum masters, and other digital professionals through AI assistance, skills, knowledge repositories, project workspaces, and integrations with enterprise platforms.Expected outcome: develop and test the platform functionality, increase its adoption and business value by ensuring that the right solutions are delivered, validated, and effectively used by end users.Key Responsibilities:- Develop and validate solutions and functionality.- Onboard users and teams to new AI capabilities and ways of working.- Facilitate demonstrations, workshops, one-on-one hands on, and feedback sessions.- Support users in adopting and effectively leveraging AI assistants, skills, and workspaces.- Measure and collect user feedback to continuously improve the platform.- Translate business needs into user stories, functional requirements, acceptance criteria, and process flows.- Define functional and non-functional requirements.- Support backlog refinement.- Assess AI capabilities of internal and external platforms and formulate recommendations for future enhancements.- Maintain clear documentation and ensure traceability from business need to delivered solution.EnvironmentThe internally developed platform relies on Microsoft Foundry/OpenAI, MCP and Fast API.Profile:Technical skills- Good understanding of LLM harnesses and agent workflowsLLM tooling and integrations: familiar with MCP, RAG, structured outputs, and prompt engineering- Understand CI/CD pipelines and investigate build or deployment failures. Familiarity with Azure, Kubernetes, and Terraform is valuable.- Code review, development, improvement, and optimization. Development experience in Python and TypeScript is a plus.- Ability to design test scenarios and automated evaluations of model behavior, tool use, and end-to-end workflows. Rigorous solution validation skills.- Logs and debugging: Read harness logs and agent execution traces, inspect model responses and tool inputs/outputs, and investigate issues involving context, token usage, latency, or failed tool calls.- Proven experience as Functional Analyst.- Requirements engineering, workflows and process modelling skills.- Digital user experience, web sites and app design, marketing, content design, collaboration platforms, design thinking practices. Knowing Figma is a plus.- Experience working in Agile environments. Knowing Agile project management platform such as Target process is a plus.Soft skills- Demonstrate excellent collaboration, communication, and documentation skills.- Proven track in stimulating user adoption, onboarding and supporting users.- Ability to quickly understand business challenges and translate them into actionable solutions.Apply now and start your journey with Team Possible! We want to get to know you.After your application, we will verify your profile and get back to you within 3working days.If you’re successful, you can expect the following steps:An initial conversation with our recruiter - Swati KumariInterview with the Hiring Manager and the team.Final decisionAbout ProximusWe are Team Possible turning tech into opportunities.We are driven by four core pillars: \"I care,\" \"I make a difference,\" \"I radically simplify,\" and \"I embrace the future\". This means you'll join a team that genuinely cares for customers and colleagues, is empowered to make a real impact, strives to radically simplify complex challenges, and is always looking ahead to embrace the future of technology. We believe in an inclusive and safe environment where everyone can thrive, offering extensive career development resources, including access to over 5,000 training modules and a minimum of 5 days of training per year, to help you continuously learn, grow, and tackle bold challenges with us.