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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Data Developers (Python) - **Company:** Keystone Solutions - **Location:** Brussel, Belgium - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Cloud Engineering, Continuous Integration, Data Integration, Extract Transform Load (ETL), IBM DB2, Linux, DevOps, IntelliJ IDEA, JSON, Python (Programming Language), Microsoft Visual Studio, Scrum Methodology, SQL Databases, UML, Spring-boot, Git, Kubernetes, Atlassian Tools, Data Management, Api Design, Restful APIs, Microservices - **Published:** May 23, 2026 - **Apply:** https://be.indeed.com/viewjob?jk=fb940f7803feaf0e ## About the Role Do you have experience in Visual Studio?, * API REST - Level: Expert; Most recent experience: any time * Atlassian Suite - Level: Expert; Most recent experience: any time * CI/CD - Level: Expert; Most recent experience: any time * DB2 - Level: Expert; Most recent experience: any time * DevOps - Level: Expert; Most recent experience: any time * ELK tools - Level: Expert; Most recent experience: any time * ETL - Level: Expert; Most recent experience: any time * Framework Agile Scrum - Level: Expert; Most recent experience: any time * GIT - Level: Expert; Most recent experience: any time * IntelliJ - Level: Expert; Most recent experience: any time * JSON - Level: Expert; Most recent experience: any time * Kubernetes - Level: Expert; Most recent experience: any time * Linux - Level: Expert; Most recent experience: any time * Python - Level: Expert; Most recent experience: any time * Spring Boot - Level: Expert; Most recent experience: any time * SQL - Level: Expert; Most recent experience: any time * UML - Level: Expert; Most recent experience: any time * Visual Studio Code - Level: Expert; Most recent experience: any time Languages: * English - Active knowledge * Dutch or French - Nice to have ## Description As a Keystone Solutions consultant, you will work on site at the client (and in hybrid modes where applicable), embedded with their teams to deliver outcomes while benefiting from Keystone's community, frameworks, and coaching. You will represent Keystone Solutions' standards of excellence, contribute to knowledge sharing, and bring proven consulting practices to help the client achieve measurable results., Role: Expert Application Developer (Most recent experience: any time). As the Expert Application Developer, you will carry out all responsibilities below under Keystone Solutions' consultancy model, working closely with the client's stakeholders and teams., * Contribute to the transformation of a legacy monolith into a modern microservices architecture operating on Kubernetes. * Apply an API-first and event-driven approach across services and integrations. * Support the broader business transformation by enabling new features, improving delivery agility, and accelerating value to internal and external users. * Help build a flexible, scalable digital platform that elevates service quality, enhances user experience, and adapts quickly to evolving business and regulatory needs. * Collaborate within Agile Scrum teams and contribute to DevOps practices, observability, and continuous improvement., * Consultancy nature of work: Engage directly at client sites as a Keystone Solutions consultant, integrating with client teams while leveraging Keystone's proven delivery practices. * Dynamic projects: Tackle diverse challenges across modernization, APIs, data platforms, and cloud-native engineering on different client missions. * Turbo-charged learning and development: Access mentoring, certifications, knowledge-sharing sessions, and a strong engineering community to broaden your expertise. * Ambition skyrocketing within a consultancy framework: Accelerate your career through varied engagements, visible impact, and a clear progression path supported by Keystone leadership. Our Values, Brought to Every Client Project: Being a K-Stone means living our values on every engagement: excellence in delivery, integrity in our commitments, curiosity in problem-solving, and teamwork that amplifies client impact. You will bring these values to the client's modernization program while upholding Keystone Solutions' consulting standards., As an Expert Application Developer, you will apply your expertise in APIs, microservices on Kubernetes, DevOps, CI/CD, observability (ELK), data and integration (DB2, SQL, ETL), and modern engineering tooling (GIT, IntelliJ, Visual Studio Code) across multiple client scenarios. You will translate complex requirements into robust solutions, guide best practices in Agile Scrum environments, and coach peers to raise engineering quality throughout the client's platform. ## Related Videos - [Navigating the Corporate Jungle: Life as a Developer in a large Company](https://www.wearedevelopers.com/videos/621-navigating-the-corporate-jungle-life-as-a-developer-in-a-large-company) - [Tips and Tricks for Working with JSON](https://www.wearedevelopers.com/videos/1229-tips-and-tricks-for-working-with-json) - [ChatGPT and Java: A Match Made in Heaven or Hell?](https://www.wearedevelopers.com/videos/536-chatgpt-and-java-a-match-made-in-heaven-or-hell) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Introducing JSON Structure](https://www.wearedevelopers.com/videos/100219-introducing-json-structure) - [Beyond UML: Making Sense of AI-Generated Code through Visual Architecture](https://www.wearedevelopers.com/videos/2102-beyond-uml-making-sense-of-ai-generated-code-through-visual-architecture) ## Related Articles - [Best Companies in the Netherlands: Top 25 Companies in 2023 ](https://www.wearedevelopers.com/magazine/193-best-companies-in-the-netherlands-top-25-companies-in-2023) - [Software Developer Salary in The Netherlands [2023]](https://www.wearedevelopers.com/magazine/217-software-developer-salary-in-the-netherlands-2023) - [The 13 Best Python Libraries for Developers in 2025](https://www.wearedevelopers.com/magazine/371-the-13-best-python-libraries-for-developers-in-2025) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs)