Arthur Odon

B2B SaaS Marketplace connecting Works Councils (CSE) and service providers (budgets, quotes, tenders, messaging, payments)

Product & Architecture Design — Definition of user journeys (CSE / provider / admin); modular structuring by features; fullstack architecture based on Next.js App Router and logical separation of business logic / data access.

Front Development (Next.js, React, TypeScript) — Complete interfaces and journeys; forms with validation (React Hook Form + Zod); UI Tailwind CSS + shadcn/ui.

Application Backend Development (Next.js Server Actions, Supabase) — Implementation of server-side business logic; data mutation and revalidation management; secure data access via Supabase (browser client / server / admin).

Database & Persistence — PostgreSQL via Supabase; relational modeling; SQL migration management; automatic TypeScript type generation.

Stripe Payments & Integration — Stripe Checkout implementation; session, intent, and billing management; webhooks for transaction synchronization; Stripe Connect Express integration for provider onboarding.

Transactional Emails — Brevo integration (API + HTML templates); automatic notifications related to quotes, payments, and user interactions.

Business Features — Budget management (categories, transactions, documents); quote lifecycle (creation, tracking, notifications); tenders (creation, response, service areas); provider catalog (services, media, marketplace, favorites); surveys (creation and public collection).

Back-office — Complete admin interface (statistics, users, companies, services, payments, tenders, contact messages); monitoring and data management tools.

Organization & Deliverables — Modular architecture (features / shared / routes); traceability via migrations and generated types; workflow documentation.

Full-stack Developer — Web3 Startup & Agency

Developing applications connecting user interfaces and the blockchain (wallets, transactions, on-chain data), alongside more traditional products (APIs, relational databases, business workflows). Participating in end-to-end product development within a small team (2-3 devs), with close collaboration (code review, task breakdown, technical alignment).

Frontend Development (React, Angular, Ionic, TypeScript) — Designing user interfaces and journeys; integrating blockchain functionalities (wallet connection, transaction execution and tracking, on-chain data display); managing UX for complex flows (signing, validation, intermediate states, errors).

Backend Development (Node.js, Express, Python) — Designing REST APIs; centralizing business logic (transactions, accounts, off-chain use cases); modeling SQL databases (schemas, relationships, migrations via ORM); integrating with blockchain services (RPC, indexers, state reading, history).

Blockchain Integration — Interacting with smart contracts (reading, calls, events); managing transaction lifecycle (construction, broadcasting, confirmations); securing exchanges (signatures, input/output validation, careful key management).

Architecture & Performance — Designing features up to production deployment; optimizing calls (latency reduction, caching, retries); on-chain / off-chain synchronization and misalignment management.

Deployment & Infrastructure — Deploying smart contracts (Ethereum, Polygon); applications on AWS with Terraform; monitoring (logs, alerts, availability).

Organization & Team — Working via ticketing system; high autonomy; iterative deliveries; participation in technical decisions and product collaboration.

Full-stack Developer — Lay3r

Specialized structure in Web3 solution development, assisting startups in designing blockchain-based products. Working on client projects in a startup environment, with high technical demands and rapid iteration cycles.

Full-stack Development (React, Angular, Node.js) — Designing and developing web applications (frontend & backend); integrating external APIs and services; implementing user journeys tailored to complex products.

Blockchain Development & Integration (Solidity) — Designing smart contracts; integrating them into applications (front & backend); interacting with contracts (reading, execution, transaction tracking).

End-to-end Product Development — Handling features from idea to production (testing, deployment, monitoring); actively participating in building products in MVP / early-stage phases.

Performance & Reliability — Optimizing applications (response time, stability, error handling); continuous improvement of technical quality.

Organization & Collaboration — Working in a startup context (agility, prioritization, rapid adaptation); close collaboration with product teams; high autonomy on the technical scope.

Environment — Innovative projects in launch phase; technical versatility; expanded responsibilities on products under construction.