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Franck DIOMANDE

Franck DIOMANDE

Lead Full-Stack Web Developer

14+ years crafting digital products

Frontend
TypeScript
React
Tailwind CSS
Backend
Node.js
NestJS
Python
FastAPI
Databases
PostgreSQL
MongoDB
Cassandra
Redis
RabbitMQ
DevOps
Docker
Kubernetes
AWS
Terraform
AI & Agent
LangChain
LanceDB
OpenRouter
Companies I've worked with
Social Media

Meta

Operates Facebook, Instagram, and WhatsApp — social platforms used by billions worldwide.

Industrial Gases

Air Liquide

World leader in gases, technologies, and services for industry and healthcare in 70+ countries.

Real Estate

Mata Capital

Real estate investment manager with over €1.5bn in assets under management.

EdTech

Ooneex

Medical study platform that turns lecture notes into smart, exam-ready flashcards.

Corporate Comms

Wiztrust

PR platform that lets corporate communication teams certify and distribute content on the blockchain.

Risk Management

Delta RM

SaaS for enterprise risk, incidents, insurance, and internal control management.

01

Profile

Fullstack engineer with 14+ years building production-grade web applications end-to-end. I design, ship, and lead — combining strong front-end craft, resilient back-end architecture, and modern AI/agentic systems. Comfortable owning the stack from React UIs to cloud infrastructure on AWS, and equally at home shaping product direction with stakeholders or mentoring engineers in code review.

  • Ship small, ship often — value and feedback over big-bang releases.
  • Design systems first — consistency, accessibility, and long-term maintainability.
  • Measure before optimizing — profiling, observability, and data-driven decisions.
  • Mentor by example — code reviews, pair programming, and shared architecture ownership.
02

Highlights

€2.4B AUM Platform tooling at Mata Capital across France & Germany
4M+ Users Patient & customer portals at Air Liquide
59 Countries Covered by Air Liquide multi-region apps
80+ Engineers International agile team at Facebook
70+ Pros served Decision-makers using Mata Capital data tools
03

Core Skills

01

Front-End

Performant, accessible, design-system-driven UIs.

React, TypeScript, Tailwind — component libraries, a11y (WCAG), motion, perf budgets.

02

Back-End

Robust APIs, secure services, scalable data layers.

Node.js, NestJS, FastAPI — REST, microservices, event-driven patterns, observability.

03

AI & Agent

RAG, multi-agent systems, LLM routing & orchestration.

LangChain, CrewAI, OpenRouter, vector DBs (LanceDB, Pinecone), MCP tool integrations.

04

Dev & Ops

Cloud infra, CI/CD, IaC, container orchestration.

AWS, Docker, Kubernetes, Terraform, GitHub Actions — from zero-to-prod pipelines.

05

Leadership

Mentoring engineers, code review, technical direction.

Architecture reviews, hiring & onboarding, roadmap alignment with product stakeholders.

06

Design & Tools

UX collaboration, product thinking, delivery tooling.

Figma, Sketch — Jira, Notion, Linear — from discovery and specs to release management.

04

Tech Stack

Languages
TypeScriptJavaScriptPythonSQLHTMLCSS
Front-End
ReactTailwind CSS
Back-End
Node.jsNestJSFastAPIREST APIsMicroservices
Databases
PostgreSQLMongoDBCassandraRedisRabbitMQ
DevOps & Cloud
DockerKubernetesAWSTerraformGitHub Actions
AI & Agentic
LangChainCrewAIOpenRouterLanceDBPineconeRAGMCP
Testing
JestBun testPyTestVitest
05

Soft Skills

  • Adaptability Thrives in fast-changing contexts and evolving requirements.
  • Collaboration Communicates clearly across product, design, and engineering.
  • Problem-Solving Breaks down ambiguity into shipped, measurable outcomes.
  • Organization Plans roadmaps, priorities, and dependencies end-to-end.
  • Design Thinking Combines UX sensitivity with engineering pragmatism.
06

Languages

  • French Native
  • English Fluent

Experience

  1. Ooneex

    EdTech / SaaS
    Lead Developer · Oct 2024 — Mar 2026
    • Vertical SaaS
    • Medical education
    • Multi-tenant
    • AI-assisted

    Vertical SaaS platform for medical education unifying content management, scheduling, assessments, and analytics into a single classroom workspace — empowering educators and students to organize, study, and track entire courses from one place.

    Key contributions

    • Built an interactive classroom dashboard providing high-level course overviews with year-level tagging, ownership, and participant management.
    • Developed a rich resource library supporting books, videos, images, notes, MCQ decks, flashcard decks, and clinical case decks with AI-powered chat.
    • Engineered an agenda and events management system for tutorials, labs, workshops, and exams with priority tracking and weekly analytics.
    • Implemented a folder-based content organization system with per-topic resource counts, favorites, and granular access control.
    • Created a resource analytics engine with format distribution charts and top-folder rankings.
    • Designed a credits-based monetization system separating free and premium content folders.

    Skills developed

    SaaS architecture & multi-tenant designAI integration (RAG, conversational agents)Real-time data analytics & dashboardsPayment & credits system designTeam leadership & code review

    Tech stack

    ReactTailwind CSSTypeScriptNode.jsPythonDockerAWSTerraformLangChain

  2. Mata Capital

    Real Estate / FinTech
    Lead Developer · Sep 2020 — Oct 2024
    • ~€2.4B AUM
    • France & Germany
    • Paris · Lyon · Hamburg
    • 70+ professionals served

    Independent real estate investment firm managing ~€2.4B in assets across France and Germany — combining investment management, investor solutions, and asset management with a strong focus on innovation, ESG, and long-term value creation.

    Key contributions

    • Built internal tools for an independent, management-owned investment firm operating with full strategic autonomy across fund decisions.
    • Developed an integrated asset management platform covering the entire value chain — acquisition, active management, property operations, and disposal.
    • Engineered cross-border investment workflows supporting the Franco-German positioning with offices in Paris, Lyon, and Hamburg.
    • Implemented portfolio dashboards for three distinct strategies: Core Plus (€1.4B), Value-Added (€810M), and Private Equity Real Estate (€150M).
    • Created data-driven decision tools leveraging advanced analytics to optimize operational management across 70+ professionals.
    • Built ESG reporting and responsible investing modules integrating sustainability metrics at the heart of investment strategies.

    Skills developed

    Financial data modeling & portfolio analyticsCross-border compliance workflowsESG reporting & sustainability trackingData-driven decision support toolsScalable architecture for regulated environments

    Tech stack

    ReactTailwind CSSTypeScriptNode.jsPythonDockerAWSTerraformLangChain

  3. Delta RM

    GRC / SaaS
    Lead Developer · Jan 2019 — Sep 2020
    • French SaaS GRC
    • Highly configurable
    • Compliance-grade security
    • Built by risk managers

    French SaaS GRC platform that centralizes and digitalizes enterprise risk management — risk mapping, incidents, insurance, internal control, audit, and prevention — in a powerful, secure, and highly configurable tool.

    Key contributions

    • Built a risk mapping module for enterprise-wide risk identification, analysis, and interactive dashboards.
    • Developed an incident and claims management system with full lifecycle tracking and reporting.
    • Engineered an insurance management module covering policies, coverages, and linked risks.
    • Implemented risk prevention action plans with assignment, deadlines, and follow-up workflows.
    • Created an internal control engine supporting level 1 and level 2 controls with evidence collection.
    • Delivered an internal audit module for audit planning, execution, findings, and recommendation tracking.

    Skills developed

    GRC domain modeling & risk enginesHighly configurable multi-tenant SaaSCompliance-grade data securityWorkflow & approval system designCollaborative enterprise tooling

    Tech stack

    ReactPythonNode.jsDockerAWS

  4. Air Liquide

    Industry / Healthcare
    Senior Developer — Freelance · Jan 2018 — Sep 2019
    • 59 countries
    • 65,000 employees
    • 4M+ end users
    • 5,600+ researchers supported

    Global leader in industrial and medical gases, technologies, and related services, operating in 59 countries and serving over 4 million customers and patients across industry, healthcare, energy transition, and semiconductors.

    Key contributions

    • Built internal platforms for a world leader in gases, technologies, and services operating at scale across industry and healthcare.
    • Engineered multi-region applications supporting operations across 59 countries and a workforce of roughly 65,000 employees.
    • Developed customer and patient portals serving a base of over 4 million users worldwide.
    • Implemented tooling around core molecules — oxygen, nitrogen, hydrogen, CO₂ — for industry, energy transition, and health.
    • Delivered financial and investment dashboards tracking multi-billion-euro sales, net income, and capital allocation decisions.
    • Created sustainability reporting modules tracking CO₂ reduction targets and extra-financial commitments across environment, health, and inclusion.
    • Contributed to R&D tooling supporting 5,600+ researchers, patent pipelines, and heavy data and digital initiatives.

    Skills developed

    Enterprise-scale multi-region platformsIndustrial & healthcare domain modelingSustainability & ESG reportingHigh-availability customer portalsData-intensive R&D tooling

    Tech stack

    ReactNode.jsPythonAWS

  5. Facebook

    Big Tech
    Software Engineer · Sep 2012 — Oct 2017
    • 80-engineer team
    • International collaboration
    • Back-office tooling
    • Agile / R&D

    Joined as part of an engineering curriculum and worked alongside senior engineers, then moved to the back-office team to develop and improve internal tooling within an 80-engineer international team — gaining deep exposure to agile methodologies and complex problem-solving in a dynamic environment.

    Key contributions

    • Contributed to R&D initiatives alongside senior engineers, exploring cutting-edge technologies and patterns.
    • Designed and implemented algorithms powering back-office tooling and data-processing pipelines.
    • Built internal APIs and integrated a wide range of external APIs across the back-office ecosystem.
    • Authored technical documentation for internal tools to accelerate team onboarding and knowledge sharing.
    • Wired microservices into official APIs and implemented a scalable microservices architecture.
    • Optimized application performance and hardened security across back-office services.
    • Collaborated closely with international development teams using agile methodologies.

    Skills developed

    Low-level programming in CMicroservices architecture & API designAlgorithm design & performance tuningLarge-team agile collaborationTechnical documentation & knowledge sharing

    Tech stack

    ReactNode.jsPythonSQL

  6. Wiztrust

    PR Tech / SaaS
    Software Engineer · Oct 2011 — Sep 2012
    • GDPR-compliant
    • EU hosting
    • Listed-company clients
    • Blockchain certification

    All-in-one, GDPR-compliant PR and communications platform helping corporate communication teams manage newsrooms, media databases, multichannel press distribution, and performance analytics — with blockchain-backed certification of corporate information.

    Key contributions

    • Built an all-in-one PR management platform unifying newsrooms, CRM, campaigns, emailing, newswires, social media, and media monitoring with personalized press reviews.
    • Developed customizable, SEO- and GEO-optimized newsrooms tuned for search and generative engines, meeting banking-grade security standards.
    • Engineered Wiztrust Protect to certify and timestamp corporate content on blockchain, proving authenticity and reducing corporate liability against fake news.
    • Created a public one-click verification portal enabling journalists and investors to instantly validate the origin of corporate information.
    • Implemented the Wiztrust Data analytics suite combining automated and human-curated insights with quarterly KPI dashboards.
    • Delivered enterprise-grade compliance and security — full GDPR, EU hosting, SSO, granular roles, and high SLAs for listed companies.

    Skills developed

    Blockchain certification & content integrityMultichannel distribution & CRM workflowsSEO / GEO optimization for newsroomsGDPR compliance & enterprise securityAnalytics pipelines & KPI dashboards

    Tech stack

    ReactNode.jsPythonAWS