Florian Lefevre

Blue Whale, the leading French exporter of apples (founded in 1950, nearly 300 producers, ~€300 million in revenue). Operations supported by a central agricultural ERP, used by about fifty employees.

Tech Leadfor this ERP, in a complex legacy context. Autonomous takeover of a team of 3 senior fullstack developers and the technical foundation.

Context: Angular, Java/Spring 2, 23 PowerBuilder applications, Oracle 9.

- **Operational management of 3 senior fullstack developers**: sprint organization, ticket management, and prioritization.

- Structured code reviews, coaching on best practices, and **responsibility for technical choices and their evolution**.

- Collaboration with product: estimations, prioritization, scoping, and securing deliveries.

- Complete autonomy on technical subjects, CTO validation for significant costs.

- Direct involvement in code (approximately 50% of the time): refactoring, structuring tasks, and unblocking issues.

- Frontend modernization:Angular 15 → 21migration, DevExtreme update, preparation for a gradual transition to Angular Material.

- Introduction ofNgRxto stabilize complex application workflows.

- **Quality reinforcement**: strict TypeScript, strict ESLint, and shared conventions.

-Nx standardizationto harmonize practices and prepare for future Angular/NestJS applications.

-Incremental modernizationof the legacy system **without service interruption**: CI/CD and debt reduction.

- **Perceived display speed increased by approximately 50%**, improved user and developer experience.

-Delivery continuity maintainedduring technical work.

-Reduced dependency on legacy systems and individual knowledgethanks to more standardized code.

Joorney, an American company providing business plans for immigration applications (EB-5, E-2, L-1 visas), ~300 business plans/month, 120+ sectors, ~100 employees.

Hands-on Engineering Managerfor the entire application scope, responsible for the team and involved in code, architecture, and delivery. Context: Angular, NestJS, Nx, PHP, Node.js, Python, AWS.

-End-to-end technical ownershipof the ecosystem: POCs, architectural choices, API integrations, and securing evolutions.

-Design and development of an ecosystemthat grew from one legacy application to 6 business applications (Angular, Word plugin, PHP backend, NestJS services).

- **Progressive migration from Symfony/PHP to Nx/NestJS**, while retaining the legacy engine.

- Integration ofPython AI modules(review, correction, inconsistency detection) and synchronizations with Microsoft, Google, HubSpot, Wrike.

- Standardization with **Nx**, **strict TypeScript**, ESLint, and shared conventions.

- FullCI/CD**, migration from Bitbucket to GitHub, and initial use of **GitHub Copilotas a development assistant.

-Product / Data / Techtrade-offs with the CPO: prioritization, scoping, and securing the scope.

- Structuring aninternational team that grew from 3 to 7 developers(5 hires, 2 squads).

- Recruitment, onboarding, individual and annual reviews, managing departures, and asynchronous intercultural management.

-Increased production capacitythrough progressive industrialization of manual or scattered processes.

- **Reduced dependency on historical tools and individual knowledge**.

- **Improved data quality and reliability**, reduction of production errors.

-Enhanced company ability to launch new servicesthrough a shared NestJS/TypeScript foundation.

Kaliz is a proptech company focused on rental property management. Founded in late 2019, raised over €22 million, managing tens of thousands of units. Operations supported by a central business application.

Tech Lead Angularfor this critical application (CRM, leases, billing), serving about 30 employees. Managed 4 to 5 frontend developers. Context: Nx, ~80,000 lines of TypeScript, 650+ components.

- **Technical responsibility for a team of 4 to 5 frontend developers**: coaching, skill development, and technical decision-making.

- Structured code reviews and daily dissemination of Angular/RxJS best practices.

- Definition of the **frontend roadmap**: debt prioritization, architectural choices, and quality/deadline trade-offs with the CTO.

- Collaboration with product to frame requirements and scope deliverables.

- Direct involvement in code (~50% of the time): refactoring, complex components, and structuring business evolutions.

-Code audit and progressive improvementof the codebase, without service interruption.

- Transition to **strict TypeScript**, strict ESLint, and shared conventions.

- **Nx standardization and schematics**: reusable components and reliable version upgrades.

- Securing deliveries:SwaggerAPI contracts and **GitLab CI/CD**.

- E2E tests withCypress / Playwrighton key workflows.

-Team became more autonomousin Angular, RxJS, code review, and common technical decisions.

- **Ability to evolve the critical application maintained**, thanks to progressively reduced frontend debt.

-Reduced fix timesfor the same scope.

- **Better-defined business needs before development**, thanks to strengthened collaboration with product.