Freelancer profile translated to English.
Back to original languageAbout Valentin
Hi, I'm Valentin 👋
I help companies design web applications, business tools, and simple, reliable integrations tailored to their actual needs.
My goal is to support you on concrete projects: creating a web interface, connecting tools together, structuring data, documenting an API, improving an internal process, or developing a clean prototype to quickly test an idea.
With 3 years of experience in IT integration, web services, SQL, API documentation, and coordination between business and technical teams, I've learned to not just "code a request," but to understand the need behind the request.
I can help with:
- Full-stack web application development
- Creating internal tools or business interfaces
- API/web service integration
- SQL data manipulation and structuring
- Technical and functional documentation
- Support for defining digital needs
- SaaS prototypes, MVPs, or demonstration tools
My profile aligns with a Product Engineer approach: I like to understand the context, interact with users, propose a realistic solution, and then develop it properly to a usable result.
I primarily work with technologies like JavaScript, TypeScript, React, Next.js, Node.js, SQL, as well as API integration and documentation environments.
What I can offer you: a serious, clear, and pragmatic approach, with a real focus on understanding the business, the quality of the deliverable, and ease of use.
Available for remote or on-site assignments in the Hauts-de-France region, particularly around Lille, Valenciennes, Douai, and Saint-Amand-les-Eaux.
Looking forward to discussing your project!
French
Native or bilingual
English
Fluent
Can work on-site
Lille (up to 50km), Valenciennes (up to 30km), Orchies (up to 30km)
Experience
- VM SolutionFounder / Full-Stack Developer & IT ConsultantSOFTWARE PUBLISHINGMay 2026 - Today (3 months)Lille, FranceI assist SMEs, freelancers, and business teams in designing web tools, automating processes, and integrating simple, reliable, and maintainable digital solutions.Services offered:
- Design of business web applications
- Process automation and reporting
- API integration and data synchronization
- Creation of dashboards and internal tools
- Technical scoping and project support: helping SMEs, freelancers, and business teams transform concrete needs into simple, maintainable, and effective digital solutions.
Development of a web solution project focused on accessible music creation, supported within an incubation program. Work on product vision, prototyping, UX, user validation, and business model. - SERGICWork-study: Project Manager Assistant / IT Integration DeveloperREAL ESTATEAugust 2022 - August 2025 (3 years)Wasquehal, FranceFor 3 years at SERGIC INVEST, I worked on integrating webMethods into the existing information system, with the goal of automating, making reliable, and structuring data exchanges between the company's various tools.My role involved designing, developing, and maintaining services to connect applications, process business data, and expose or consume APIs. I specifically worked on flows related to databases, web services, exchanges with internal/external solutions, and interface documentation.This experience allowed me to work on both technical and functional aspects: understanding business needs, analyzing existing flows, designing suitable solutions, writing API documentation, testing, bug tracking, and progressively improving production processes.I contributed to:
- Integrating webMethods into the existing IS
- Designing and developing integration services
- Creating and documenting REST web services
- Manipulating and exploiting SQL data
- Structuring flows between internal and external applications
- Writing Swagger / OpenAPI documentation
- Collaborating with business teams to transform needs into technical solutions
- Improving the reliability, readability, and maintainability of production flows
This experience gave me a true understanding of the challenges of an enterprise IS: data quality, reliable exchanges, clear documentation, business understanding, and the ability to deliver useful solutions within an existing environment.Technical environment: webMethods, API Gateway, IBM Integration Server, REST, OAuth2, Swagger, OpenAPI, Java, Angular, Vue.js, Node.js, SQL, AS400, SAGE, Bluesoft, Microsoft Azure - MUSICRAFTFounder / Product BuilderCULTUREApril 2026 - Today (4 months)Roubaix, FranceMusicraft is a web software project aimed at making music creation more accessible to beginners, especially in educational, associative, and cultural contexts.The idea is to offer an experience inspired by visual creation tools: allowing users to quickly compose music from sound blocks, without needing to master music theory, an instrument, or complex Digital Audio Workstation (DAW) software.On this project, I work on product design, user experience, interface prototyping, and thinking about real-world uses: students, teachers, cultural organizations, associations, or beginners wanting to explore music composition.I am specifically studying:
- Defining the concept and value proposition
- Designing a simple, progressive, and educational user experience
- Creating web interface prototypes
- Exploring uses in educational and cultural settings
- Integrating learning and progression mechanics
- Setting up a prototype combining music, digital technology, and pedagogy
- Preparing materials to present the project to teachers, partners, and support organizations
This project allows me to develop a comprehensive approach, close to the Product Engineer role: understanding user needs, structuring a solution, designing a clear interface, prototyping quickly, and transforming an idea into a testable product.Musicraft was also part of an incubation program, which allowed me to confront the project with challenges of positioning, field validation, and product development.Environment / Skills used:product design, UX/UI, web prototyping, React, Next.js, TypeScript, Tailwind CSS, music pedagogy, MusicTech, EdTech, MVP.
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Education
- Master I2l, Computer ScienceUniversité du Littoral Côte d'Opale2025Master I2l, Informatique
- Professional Bachelor's Degree, Computer ScienceIut de Calais2023Licence professionnelle, Informatique