Freelancer profile translated to English.
Back to original languageAbout Callixte
React/Next.js Developer with 5+ years of experience
Looking for a React developer?
You've come to the right place.
I am a software engineer with over 5 years of experience and a specialist in React and Next.js development.
Areas of experience:food industry, recruitment, energy/construction, real estate, telecommunications
References:Revolt.eco, Wabel (Needl), Bouygues Telecom, Kador.io, Sunday
Key skills:
- Development of user interfaces according to business needs
- Writing technical specifications and User Stories
- Scalable software architecture
- Best practices (clean code, SOLID, TDD)
- Technical debt resolution
- CI/CD and technical documentation
- Testing/optimization for bug-free UX
- Unit tests
- Version control management
- Refactoring and code review
Technical Stack:
- Frameworks: React.js, Next.js, Node.js, Django
- Languages: Javascript, Typescript, Python, Flutter, Solidity, Java, SQL
- Libraries: TanStack Query, Tailwind CSS, React Hook Form, Zod, Express.js
- Databases: PostgreSQL, MySQL, MongoDB, Firebase
- Low-code: Retool, Xano, N8N, Webflow, Flutterflow
- Versioning: Git, Github
Quality commitment:
I am committed to producing quality code and will fix any bugs I introduce free of charge. I apply SOLID principles, clean code, and architecture with a pragmatic approach.
Daily report of tasks performed.
Do you have a project?
Contact me!
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km), Lyon (up to 50km), Marseille (up to 50km), Lille (up to 50km), Nantes (up to 50km)
Experience
- Callixte GirardFrontend Web Developer | React | Next.jsJanuary 2020 - Today (6 years and 5 months)Paris, FranceLooking for a React developer?You've come to the right place.I am a software engineer with over 5 years of experience and a specialist in React and Next.js development.Areas of experience: food industry, recruitment, energy/construction, real estate, telecommunicationsReferences: Revolt.eco, Wabel (Needl), Bouygues Telecom, Kador.io, SundayKey skills:- Development of user interfaces according to business needs- Writing technical specifications and User Stories- Scalable software architecture- Best practices (clean code, SOLID, TDD)- Technical debt resolution- CI/CD and technical documentation- Testing/optimization for bug-free UX- Unit tests- Version control management- Refactoring and code reviewTechnical Stack:- Frameworks: React.js, Next.js, Node.js, Django- Languages: Javascript, Typescript, Python, Flutter, Solidity, Java, SQL- Libraries: TanStack Query, Tailwind CSS, React Hook Form, Zod, Express.js- Databases: PostgreSQL, MySQL, MongoDB, Firebase- Low-code: Retool, Xano, N8N, Webflow, Flutterflow- Versioning: Git, GithubQuality commitment:I am committed to producing quality code and will fix any bugs I introduce free of charge. I apply SOLID principles, clean code, and architecture with a pragmatic approach.Daily report of tasks performed.Do you have a project?Contact me!
- Revolt.ecoFullstack Web Developer | React | Next.jsJanuary 2024 - December 2024 (11 months)Revolt.eco is a French startup in the renewable energy sector aiming to help solar panel installers with an all-in-one digital solution.The company has 150 subscribed clients and 2500 installations completed and signed via the platform in just one year of existence with only about ten employees.I joined the team as a full-stack React.js developer with a front-end focus, to reinforce the web development team.The team was supervised by a CTO and composed of 3 full-stack developers, one front-end oriented and one back-end oriented.The application is based on the Next.js framework (a versatile framework for web apps based on React.js on the front-end and Node.js on the back-end).The PostgreSQL database is managed directly from Next.js using Prisma.I contributed to the development of features for the all-in-one software solution which includes solar studies, technical constraints, administrative management, and many other innovative features.My responsibilities included:- Development of new features on the Next.js / React application- Fast and bug-free delivery of features while respecting best practices- Database evolutions for PostgreSQL using Prisma- Joint brainstorming on the best way to implement major evolutions- Code review of other developers during pull requestsHere are the evolutions I contributed to between the summer and fall of 2024, since the solution was commercialized:- The number of subscribed clients increased by +50%: 100 -> 150- The number of installations completed increased by +20%: 2000 -> 2500Website: https://www.revolt.eco/
- Kador.ioFullstack Web Developer | React | Next.jsSeptember 2022 - December 2023 (1 year and 3 months)Kador is a startup in the recruitment sector. The company offers a comprehensive and innovative recruitment application (ATS).Features range from candidate sourcing to contract signing between the candidate and the client.I worked as a full-stack React.js developer on Next.js.I worked closely with the CTO to quickly and efficiently deliver features in sprints.My mission included:- Full-stack development of the application with React / Next.js- Regular participation and facilitation of discussion sessions with users according to the Agile methodology to fully understand their needs and questions- Migration of the application's database to PostgreSQL- Migration of the existing app from low-code platforms (Retool for front-end and Xano for back-end and database)- Implementation of CRON jobs to define regular automated actions and procedures in the background- Occasional use of Retool for rapid prototyping and drafting- Development of a Chrome extension for LinkedIn, complementary to the main app, in pure JavaScript (vanilla), without external libraries.Thanks to the solution we implemented:- Internal recruiters took approximately 70% to 90% less time to source suitable candidates- Internal recruiters took approximately 30% to 40% less time to present excellent candidates to the client- A complete recruitment took on average 20% to 50% less time than a traditional recruitment.
Reviews
AD
Account deleted
Reviewed on 7/29/2021
Excellent web scraper. Very efficient, responsive, and professional.
Mahmoud
M&R DEVICES
Reviewed on 8/27/2020
Excellent work from Callixte!!! We are very satisfied with the delivered result which exactly matches what we wanted to achieve. Callixte demonstrated excellent listening skills and provided advice throughout the mission, and did not hesitate to make suggestions in terms of creativity to improve our graphical interface.
I therefore recommend his profile and would not hesitate to contact him again if I have other needs within his scope of expertise.
Recommendations
+4
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Education
- Digital Engineering Degree, Development specializationISEP (Paris, France)2019Grande Ecole d’ingénieurs généralistes dans tous les domaines du numérique. Formation effectuée en apprentissage sur les 3 dernières années. Le programme associe une solide formation scientifique et technique à un enseignement managérial approprié et développe une forte dimension internationale.
Certifications
- Engineering DegreeISEP - Digital Engineering School2019
- TOEIC (895)ISEP2018