Freelancer profile translated to English.
Back to original languageAbout David Martin
Are you looking for a full-stack developer specializing in React and Django?
You've come to the right place.
I am a web developer with over 7 years of experience and a specialist in React, TypeScript, and Django.
I have worked in various sectors such as e-commerce, health insurance, food tech, and finance.
I have collaborated with companies like Leboncoin, Qantev, and Foodles.
I am capable of:
- Designing, developing, and maintaining features that maximize commercial impact and provide tangible value.
- Analyzing product design decisions and their impact on the architecture of IT systems.
- Developing front-end applications with React, TypeScript, and Next.js.
- Implementing pixel-perfect designs with various style and user interface libraries.
- Building robust back-end systems with Django.
- Configuring relational databases (PostgreSQL, MySQL), modeling data, and performing complex migrations.
- Setting up CI/CD pipelines to streamline deployment and ensure continuous integration.
- Deploying cloud-based web applications using Kubernetes and Docker.
- Writing clear and structured technical documentation to improve knowledge sharing and maintainability.
- Performing unit and integration tests to ensure code quality and reliability.
I am a pro at adapting to ambiguity as product and user needs evolve.
I also place a huge emphasis on transparency with my clients.
That's why I send a daily report of all the tasks I've completed.
Do you have a project? Contact me, I respond very quickly.
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React developer react.js developer reactjs developer react js developer react node developer react typescript react next react node.js react python reactjs django react js django react drf
English
Native or bilingual
French
Fluent
Spanish
Conversational
Can work on-site
Paris (up to 50km), Lyon (up to 50km), Bordeaux (up to 50km), Lille (up to 50km), Marseille (up to 50km)
Experience
- La plateforme de l'inclusionDjango Fullstack DeveloperPUBLIC SECTORJune 2025 - Today (1 year)Paris, FranceDORA is one of the digital services within the Inclusion Platform, a French government platform that helps social workers and employment counselors identify and guide beneficiaries to the most appropriate social integration services.As a freelance full-stack developer in a two-person team, I contribute to the construction and maintenance of critical features for this high-impact social platform. In a lean and agile environment, I balance practical development and strategic product decisions to maximize value with limited resources.Key responsibilities:- Develop full-stack features with Django/Python (backend) and Svelte/TypeScript (frontend) for a seamless user experience nationwide.- Implement monitoring and error tracking with Sentry to maintain reliability and quickly identify production issues.- Investigate and resolve critical bugs while optimizing performance to maintain service continuity.- Refactor the Django admin to allow non-technical colleagues to perform data imports autonomously.- Make product engineering decisions to prioritize features with maximum impact.- Collaborate closely with my development partner to ensure code quality and efficient delivery.- Manage deployment and infrastructure with Docker/Scalingo while leveraging Metabase for data insights.This small but crucial team helps the French social integration ecosystem function more efficiently to improve employment outcomes for vulnerable populations.Technical context: Django, Python, Svelte, TypeScript, PostgreSQL, Docker, Scalingo, Sentry, Metabase, DRF, Python/Django
- QantevDjango React Fullstack DeveloperBANKING AND INSURANCEDecember 2024 - March 2025 (3 months)Paris, FranceQantev is a healthtech startup that helps insurers extract and fully leverage the business value of their documents. Founded in 2019, the company has raised over €30 million and serves over 20 clients worldwide.Hired as a freelance full stack developer, I was tasked with creating an internal tool from scratch to help sales teams create and manage custom client demos, replacing a manual and time-consuming process based on large local JSON files.Working closely with a product manager, I worked autonomously to transform the product vision into a fully deployed solution.My responsibilities included:Translating high-level product requirements into clear and actionable development tasks.Designing and implementing the backend architecture using Python and Django Rest Framework, including PostgreSQL data modeling, with a focus on isolating demo logic from production systems.Developing the frontend using React, TypeScript, and Ant Design, based on provided design mockups.Coordinating with DevOps to deploy a cloud-based web application using Kubernetes, ensuring data persistence and environment separation.When I joined the team, the tool only existed as a rough concept. In three months, Qantev had a fully operational solution that reduced the time required to prepare client demos by more than 50%, while allowing demos to be saved and shared within the sales team.Link: https://www.qantev.comRecommendation from the tech lead I collaborated with below.Technical context: React, TypeScript, Ant Design, Kubernetes, Python, Django
- LeboncoinReact Next Front-end DeveloperE-COMMERCEOctober 2023 - Today (2 years and 8 months)Paris, FranceLeboncoin is one of the largest online classifieds platforms in France, attracting over 28 million unique users each month. The site covers a wide range of sectors, including real estate, vehicles, job offers, and consumer goods.As a freelance frontend developer, I joined Leboncoin's advertising team to improve the display and performance of ads on the web platform. My job was to deliver scalable, high-impact features in a high-traffic environment.My main responsibilities included:- Designing and implementing new ad-related features using Next.js, React, TypeScript, and Tailwind CSS, while maintaining high performance standards for millions of daily users.- Collaborating with an international team of developers, product managers, and designers to align frontend solutions with evolving business goals.- Conducting thorough code reviews to maintain high code quality, prevent regressions, and ensure reliable production deployments.- Contributing to complex UI integrations and performance optimization on the web application.- Working with Agile methodologies in a fast-paced, metrics-driven environment.- Writing clear documentation and explaining new features to technical and non-technical stakeholders to ensure alignment and smooth adoption.With a focus on code quality, performance, and maintainability, I helped ensure that the ad serving experience remains fast, flexible, and aligned with revenue goals.Link: https://www.leboncoin.frTechnical context: React, TypeScript, Next.js, Tailwind CSS, Node.js
Reviews
Recommendations
FU
FU
+2
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Education
- Bachelors of Arts (equivalent to a Bachelor's degree)University of California, Los Angeles2007Major: English literature Spécialité: Littérature Anglaise 3.77 GPA Mention Honorifique: Cum Laude
Certifications
- Web developmentIronhack2018