Nicolas Gonfo
Nicolas Gonfo

Full-Stack TypeScript Engineer

Open to offers · Member since 14 Oct 2026
Location
France
Desired salary
Unspecified
Work preference
Remote Only / Full Time, Contract, Freelance
Experience level
Senior

About

Professional summary

I am a product-focused full-stack TypeScript engineer building web products and client software since 2020. I specialize in taking features from early product scoping through implementation, testing, deployment, and production follow-up.

I build modern B2B SaaS applications with React, Next.js, Node.js, PostgreSQL, and typed APIs. My work often involves complex workflows, data-heavy interfaces, multi-tenancy, authorization, billing, reporting, and reliable background processing.

I am comfortable owning both frontend and backend concerns. I design responsive and accessible user interfaces while also handling data models, API design, database performance, migrations, caching, and system reliability.

I use product instrumentation, testing, and production evidence to guide iteration. I value pragmatic scope decisions, incremental delivery, and simple technical solutions that preserve customer outcomes.

I have also delivered client websites, e-commerce storefronts, SEO work, and digital projects for local businesses. I work remotely from Réunion, France, and am eligible to work in France.

Skills

34 capabilities

Tech stack & tools

Working toolkit

Analytics

Application Hosting

Data Stores

Languages & Frameworks

Monitoring

Experience

Career history

Independent Product Engineer / Full-Stack Developer Self-employed

I own product work from problem definition and scoping through technical approach, schema and API design, interface development, testing, deployment, and production follow-up.

I make pragmatic scope and architecture trade-offs, deliver work in smaller slices where useful, and iterate based on product evidence. I work across frontend performance, data integrity, and backend reliability to deliver coherent product experiences.

Product Engineer Kadryn

Built an AI cost management and governance SaaS with data-heavy usage, cost, governance, and billing workflows using TypeScript, React, Next.js, PostgreSQL, Prisma, Redis/Upstash, Stripe, and PostHog.

Improved reliability and performance with caching and invalidation, database indexing, concurrency-safe idempotency, and background processing. Designed separate models for observation, recommendations, human decisions, and runtime controls, and built analytics and experiment guardrails.

Product Engineer Independent multi-tenant product

Designed responsive desktop and mobile workflows for a travel orchestration SaaS using TypeScript, Next.js, PostgreSQL, Supabase, Better Auth, Stripe, and Turborepo.

Implemented PostgreSQL and Supabase row-level security, organization capabilities, and current-membership authorization checks. Added durable background processing, provider reconciliation, retry and recovery states, server-side analytics, structured logging, and release evidence.

Web Developer / Consultant Clé Solutions

Designed and built a responsive website for a local-service business.

Created clear service-discovery and conversion paths for phone calls, quote requests, contact actions, and map access.

Shopify Developer / Web Consultant Educanin

Built and customized a Shopify storefront using custom Liquid sections and theme modifications.

Structured content and inquiry paths around the business offer to support product presentation and customer contact.

Full-Stack Web Developer RUNFAC

Contributed frontend, backend, and administration features to a custom online-training platform using JavaScript, PHP, and Symfony.

Performed maintenance work and delivered workflow improvements for the platform.

Web & Digital Project Lead Massage Bien-Être

Manage the web and digital presence for a wellness business, including website and e-commerce delivery, content, SEO, and ongoing improvements.

Collaborate directly with the business owner to align digital delivery with operational and commercial needs.

Education

Learning history

Digital Campus

Professional Diploma, Full-Stack & Android Development

Professional diploma in Full-Stack and Android Development.

Université Paul-Valéry Montpellier

Bachelor Degree, Language Sciences

Bachelor degree in Language Sciences.

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