09/20/2025 updated
100 % available
Lead Go/React Developer | Senior Fullstack
Saint-Joachim, France
Saint-Joachim +250 km
Master of Engineering - MEng, Computer ScienceArchitectureAutomationSoftware QualityComputer ProgrammingDatabasesContinuous IntegrationGitHubPostgreSQLMongoDBMySQLRedisTypeScriptWeb ApplicationsWorkflowsData Storage Technologies
Go Programming
Extensive experience with Go for backend development, building microservices, and creating high-performance applications with strong focus on reliability and maintainability.
React Development
Advanced React skills for creating responsive and interactive frontend applications, with expertise in component architecture and state management.
Fullstack Architecture
Comprehensive knowledge of fullstack development combining Go and React/Vue.js, with experience designing and implementing complete web applications from database to user interface.
TypeScript
Strong TypeScript skills for building type-safe frontend applications with improved code quality and maintainability.
Docker & Containerization
Expertise in containerization technologies including Docker, Docker Swarm, and Kubernetes for deployment and orchestration of microservices.
Database Technologies
Proficiency with various database systems including PostgreSQL, MongoDB, MySQL, and Redis for data storage and retrieval solutions.
CI/CD Pipelines
Experience implementing continuous integration and deployment workflows using GitHub Actions, GitLab CI/CD, and other automation tools.
Vue.js
Skilled in Vue.js framework for building interactive user interfaces with a focus on component-based architecture.
Extensive experience with Go for backend development, building microservices, and creating high-performance applications with strong focus on reliability and maintainability.
React Development
Advanced React skills for creating responsive and interactive frontend applications, with expertise in component architecture and state management.
Fullstack Architecture
Comprehensive knowledge of fullstack development combining Go and React/Vue.js, with experience designing and implementing complete web applications from database to user interface.
TypeScript
Strong TypeScript skills for building type-safe frontend applications with improved code quality and maintainability.
Docker & Containerization
Expertise in containerization technologies including Docker, Docker Swarm, and Kubernetes for deployment and orchestration of microservices.
Database Technologies
Proficiency with various database systems including PostgreSQL, MongoDB, MySQL, and Redis for data storage and retrieval solutions.
CI/CD Pipelines
Experience implementing continuous integration and deployment workflows using GitHub Actions, GitLab CI/CD, and other automation tools.
Vue.js
Skilled in Vue.js framework for building interactive user interfaces with a focus on component-based architecture.
Experience
Professional experience10+ years
Freelancer since2019
Languages
EnglishFluentFrenchNative speaker
Project history
Context
I founded VargTech to support companies in designing and developing their business tools, either from scratch or by joining an existing team as Lead Developer.
Team
I work solo or embedded within my clients’ teams, in direct collaboration with business stakeholders. For fixed-price projects, I can also assemble a team with trusted freelancers.
My Role
- Scoping needs and functional design in collaboration with end users
- Fullstack development (Go / React)
- Setting up tests, technical documentation, and ready-to-deploy delivery
- Providing technical support to internal teams when needed
Projects Delivered
- TF1: advertising campaign simulation application (Go/React)
- OVHcloud: monitoring and synchronization of critical data flows (Go/Vue.js)
Results
- Tools aligned with business needs
- Internal teams strengthened on their technical projects
- Reliable deliverables, documented, and built to last
Main Stack
Go, React, TypeScript, TailwindCSS, Docker, PostgreSQL, SQL
I founded VargTech to support companies in designing and developing their business tools, either from scratch or by joining an existing team as Lead Developer.
Team
I work solo or embedded within my clients’ teams, in direct collaboration with business stakeholders. For fixed-price projects, I can also assemble a team with trusted freelancers.
My Role
- Scoping needs and functional design in collaboration with end users
- Fullstack development (Go / React)
- Setting up tests, technical documentation, and ready-to-deploy delivery
- Providing technical support to internal teams when needed
Projects Delivered
- TF1: advertising campaign simulation application (Go/React)
- OVHcloud: monitoring and synchronization of critical data flows (Go/Vue.js)
Results
- Tools aligned with business needs
- Internal teams strengthened on their technical projects
- Reliable deliverables, documented, and built to last
Main Stack
Go, React, TypeScript, TailwindCSS, Docker, PostgreSQL, SQL
Context
TF1 wanted to modernize an Excel file used by the sales teams to simulate advertising campaigns. The goal: extend functionality, ensure reliable calculations, and simplify daily use for the teams.
Team
A small team consisting of a PO, a junior developer, a QA, and myself as Lead Developer. Close collaboration with the business teams.
My Role
I led the development of the application end-to-end:
- Integration of pricing and targeting rules
- Visualization of geographic coverage and business criteria
- Real-time campaign simulation
- Automated email delivery of results
Results
- Full adoption by sales teams, tool used daily
- Significant reduction in errors
- Instant updates of business rules
- Improved visibility and control over campaigns
Tech Stack
- Backend: Go, Gorm, PostgreSQL, PostGIS, Redis, OpenTelemetry, Prometheus
- Frontend: React, Tailwind, DaisyUI, TypeScript, Vite, Vitest, Cypress
- Infra: Docker, Kubernetes, AWS, ArgoCD, GitHub Actions
TF1 wanted to modernize an Excel file used by the sales teams to simulate advertising campaigns. The goal: extend functionality, ensure reliable calculations, and simplify daily use for the teams.
Team
A small team consisting of a PO, a junior developer, a QA, and myself as Lead Developer. Close collaboration with the business teams.
My Role
I led the development of the application end-to-end:
- Integration of pricing and targeting rules
- Visualization of geographic coverage and business criteria
- Real-time campaign simulation
- Automated email delivery of results
Results
- Full adoption by sales teams, tool used daily
- Significant reduction in errors
- Instant updates of business rules
- Improved visibility and control over campaigns
Tech Stack
- Backend: Go, Gorm, PostgreSQL, PostGIS, Redis, OpenTelemetry, Prometheus
- Frontend: React, Tailwind, DaisyUI, TypeScript, Vite, Vitest, Cypress
- Infra: Docker, Kubernetes, AWS, ArgoCD, GitHub Actions
Context
OVHcloud was undertaking a gradual modernization of its internal tools, with a dual challenge: ensuring compatibility with SAP and maintaining continuity of critical operations.
Team
Internal technical team, with regular interactions with business and infrastructure teams.
My Role
I developed several fullstack applications to:
- Automatically synchronize data between legacy internal tools and SAP
- Monitor in real time the message exchanges between critical services
- Enable replay of data flows in case of anomalies to ensure data reliability
Results
- Automated synchronization = major time savings and end of manual updates
- Increased reliability of inter-system exchanges
- Reduced error rate and improved responsiveness in case of incidents
Tech Stack
- Backend: Go, Gorm, Kafka, PostgreSQL, MySQL, Redis
- Frontend: Vue.js, TypeScript
- Infra: Docker, CI/CD, distributed systems, SAP integration
OVHcloud was undertaking a gradual modernization of its internal tools, with a dual challenge: ensuring compatibility with SAP and maintaining continuity of critical operations.
Team
Internal technical team, with regular interactions with business and infrastructure teams.
My Role
I developed several fullstack applications to:
- Automatically synchronize data between legacy internal tools and SAP
- Monitor in real time the message exchanges between critical services
- Enable replay of data flows in case of anomalies to ensure data reliability
Results
- Automated synchronization = major time savings and end of manual updates
- Increased reliability of inter-system exchanges
- Reduced error rate and improved responsiveness in case of incidents
Tech Stack
- Backend: Go, Gorm, Kafka, PostgreSQL, MySQL, Redis
- Frontend: Vue.js, TypeScript
- Infra: Docker, CI/CD, distributed systems, SAP integration