Freelancer profile translated to English.
Back to original languageAbout Baptiste
Full-Stack Developer | Web Applications, SaaS & AI Integration
Do you need to develop a web application, modernize an existing tool, or integrate AI into a business product?
I assist companies withconcretefull-stack projects: dashboards, SaaS platforms, internal tools, automations, API integrations, and LLM-based features.
My goal: deliver a solution that isreliable**, **maintainable**, and directly **usefulto your business.
What I can build for you
Web & SaaS Applications
I design and develop modern applications, from front-end to back-end, with a particular focus on code quality, user experience, and maintainability.
Examples of missions:
- Development of MVPs or new features
- Creation of dashboards and business interfaces
- Redesign or modernization of existing applications
- Integration of APIs and third-party services
- Implementation of tests, CI/CD, and deployment best practices
AI & LLM Integration
I help transform an AI idea into anactionableproduct feature: document analysis, content generation, task automation, or internal assistants.
Examples of deliverables:
- Quick AI POCs to validate an idea
- LLM API integration
- Search, analysis, or generation features
- Industrialization of an AI prototype into an existing application
My added value
I can get involved in both pragmatic short-term needs and more structuring projects: improving an existing tool, making a critical workflow reliable, or adding an AI layer.
Main Stack:
Python, Django, FastAPI, React, Next.js, PostgreSQL, Supabase, BigQuery, LLM, RAG, Docker, GitLab CI, Playwright.
Do you have a project?
Describe your needs, context, and constraints to me.
I'll help you frame a clear, realistic, and deliverable solution.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- CreaBoostinternshipMarch 2025 - August 2025 (5 months)Continued development of CreaBoost as afreelancedeveloper, focusing on product evolution, report performance, advertising integrations, and quality.Main missions:• Optimization of critical reports such as Top Performing, Magnetic Products, Metrics Evolution, Metrics Breakdown, and Creative Fatigue.• Refactoring of data fetching with React Query, improving cache, reducing unnecessary requests, and better management of selected accounts.• Added Google Ads support with BigQuery integration, dynamic tables, and group-by by channels.• Improvement of templates, unified duplication of reports/boards, and compatibility with connected platforms.• Implementation of end-to-end tests with Playwright in GitLab CI, including configuration, timeouts, retries, and test artifacts.• Handling of edge cases: viewer restrictions, report migration during account deletion, unauthorized errors, and connector/template compatibility.Stack:Next.js, React, React Query, Supabase, PostgreSQL, BigQuery, Google Ads, Meta Graph API, Playwright, GitLab CI.What this mission demonstrates:Ability to work on an existing data SaaS, improve its robustness, evolve its architecture, and secure critical production workflows.
- CreaBoostFull Stack DeveloperDIGITAL AND ITMarch 2025 - August 2025 (5 months)Paris, FranceInternship focused on the Next.js/TypeScript environment where I took on significant responsibilities and worked autonomously on the entire feature lifecycle, from front-end to back-end and deployment via CI/CD. I strengthened my skills in production development, emphasizing code security, efficiency, and maintainability.Key achievements:Added multiple features: Customizable dashboard for ad analysis data, creation of a user journey to better understand the application, development of an in-page help module to watch a video on a custom player with synchronized transcription.Created a customer analysis system: Implemented tracking to understand user interactions with the interface, identify drop-off points, and inform product decisions.Implemented secure public access: Designed and developed a solution allowing unauthenticated users to access certain parts of the application, thus expanding our reach.
- Diot-SiaciDeveloperBANKING AND INSURANCESeptember 2024 - March 2025 (6 months)Paris, FrancePart-time internship focused on researching and developing Generative Artificial Intelligence solutions. My mission was to explore the potential of Large Language Models (LLMs) and integrate them into business applications to improve operational efficiency and user experience. My role combined technological watch, rapid prototyping (POC), and comparative analysis to guide technical choices.Key achievements:Integrated AI into key features: Designed and developed prototypes integrating LLM capabilities to analyze unstructured data, create a support chatbot, search for important data within document sets, and perform intelligent comparison of contract versions.Technical validation through Proof of Concept (POC): Independently created several POCs to evaluate the feasibility and performance of different technologies and approaches. Notably, I developed a POC comparing the performance of public LLM APIs for our specific use cases.
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Education
- Degree of Expert in Information Technology certified by the French Ministry of Higher Education and ResearchEpitech
- Title of Expert in Software Engineering registered at RNCP Level 7Epitech