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Simon TannaiST

Simon Tannai

⚡️CTO & Tech Lead | Node NestJS TypeScript

€500/day
12 projects
Paris, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Simon

Pragmatic Tech leader

+14 years of engineering · +8 years of management · 6 CTO positions

I intervene on two fronts:

🔧 I stabilize when it's chaos.
Sudden departure of a CTO, team in conflict with management, need to scale without technical direction. I diagnose, structure, and hand over.

🚀 I build when speed is essential.
From concept to MVP in production: architecture, code, embedded AI. I deliver a scalable product, not a slide.

My credo: I solve business and organizational problems with technology and pragmatism.

My missions

🛠️ Interim CTO / Tech Lead
Your CTO has left, your team is running without direction?
I arrive, I diagnose, I get the team moving again.

⚡ Product Builder — from MVP to production
An idea, a tight deadline, a startup budget?
I design the architecture, code the product, and integrate AI where it truly adds value. You leave with something that works.

🔬 CTO / CEO Consulting
An architectural decision, a tech recruitment to validate, an AI strategy to frame?
Let's discuss it, you'll leave with a clear answer.

Concrete results

OCUS — As CTO, I led the migration of a production project from PHP to Node.js. Recruited +7 engineers. Structured the project routines of a growing team.

Givematic — Founder & Tech Lead. Designed and developed a FinTech SaaS from A to Z, from architecture to production, in a demanding and regulated market.

Stack

TypeScript · Node.js · NestJS · Next.js · React · PostgreSQL
AI: LLM integration, code agents, workflow automation

📍 Paris · Remote & occasional on-site
📧 Slack, WhatsApp, email
🤝 Total transparency

A mission accomplished is a mission that ends.
Let's talk about yours.
  • French

    Native or bilingual

  • English

    Native or bilingual

  • Spanish

    Basic

Can work on-site
Paris (up to 50km), Lille (up to 50km), Lyon (up to 50km), Bordeaux (up to 50km), Nantes (up to 50km)

Experience

  • Givematic
    Co-Founder & CTO
    PRIVATE EQUITY
    April 2025 - Today (1 year and 2 months)
    Paris, France
    💰 FinTech - Philanthropy

    Givematic offers a lightweight alternative to foundations/endowments for structuring long-term philanthropic strategy, with governance, traceability, and compliance, without legal burdens.
    Leadership Node.js TypeScript Next.js NestJs
  • OCUS
    CTO - Node.js | NestJS | TypeScript
    FILM AND AV
    April 2024 - February 2025 (10 months)
    Paris, France
    📸 B2B SaaS Startup - Content Creation

    🚀 --- My Mission --- 🚀
    ● Recruitment
    ● Technical Team Management (12 people)
    ● Human Resources Management
    ● Project Management
    ● Company Technical Strategy
    ● Board Consulting

    🔥 --- Results --- 🔥
    ● Recruitment of 8 profiles, from Junior to Lead
    ● Stabilization of the team and processes
    ● Technical roadmap defined for 6 months
    ● Migration from IaaS (AWS) to PaaS (Clever Cloud)
    ● Successful deployment of the new platform

    🛠️ --- Technical Stack --- 🛠️
    ● Node.js
    ● NestJS
    ● Next.js
    ● TypeScript
    ● TypeORM
    ● PostgreSQL
    ● Docker
    ● Gitlab CI/CD
    Node.js NestJs Next.js TypeScript Team Management
  • Blyynd
    CTO Advisor
    SOCIAL NETWORKS
    April 2024 - October 2024 (6 months)
    Paris, France
    🍆 B2C Mobile App Startup - Sexuality and Health

    🚀 --- My Mission --- 🚀
    ● CTO Consulting
    ● Recruitment

    🔥 --- Results --- 🔥
    ● Improvement of daily production
    ● Improvement of the product roadmap
    Recruitment Consulting Organizational Consulting Management Consulting

Reviews

4.7

Out of 4 ratings

O

Olivier

index.tv

Reviewed on 4/16/2024

Very good collaboration I recommend without hesitation
O

Olivier

index.tv

Reviewed on 2/29/2024

I recommend without any problem very good work

Recommendations

FU
CB
Julie Z.JZ
+7
Former user and 9 other people have recommended Simon

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Education

  • Master 2 (M2), Computer projects and teams management
    IT-Akademy
    2017
    Master 2 (M2), Computer projects and teams management
  • Master 1 (M1), Full-stack Developer
    IT-Akademy
    2016
    Master 1 (M1), Développeur full-stack

Certifications

Skill set

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