You're seeing this page as if you were . The main menu is still yours, though. Exit from immersion
Wassim RekikWR

Wassim Rekik

CTO&Cofounder | Product Builder | Voice AI · LLM

€670/day
Paris, FR
3-7 years

Average response time: 1 hour

About Wassim

You have a product idea, a technical problem, or a team that needs to move faster. I cover the full chain — alone if needed.

From product scoping and Figma design to backend, AI pipeline, database architecture, DevOps, CI/CD, and production deployment: I own every layer. I've done it before. At Terracall, I built a full telecom-grade AI product from scratch with 3 engineers — Asterisk PBX, SIP/SMPP stack, real-time voice AI pipeline achieving 1.5s end-to-end latency (ASR + LLM + TTS + VAD), a generic CRM integration engine covering 10+ platforms, MongoDB clusters, Redis job queues with BullMQ, and full IaC with Pulumi.


Before that, 5 years at Zaion — France's leading conversational AI company — where I grew from end-of-study intern to Head of Engineering, then Head of Product, then CODIR (executive committee). I built the engineering team from 1 to 8 engineers + 2 DevOps: full hiring process (JDs, sourcing, technical interviews, salary negotiation, yearly reviews), engineering culture from scratch (code review standards, security reviews, dev lifecycle, OKRs for C-level), and managed through real crises — including a full infra provider outage recovered in 24h under client and internal pressure. Products I shipped are now deployed at 50+ French enterprise clients: Carglass, Edenred, La Banque Postale.

What I bring to your mission:
→ Full product ownership: from idea and scoping to commercial product — no handoffs
→ Technical breadth: AI pipelines, telephony, full-stack, databases, DevOps, integrations
→ Speed under constraint: I've shipped production systems in startup conditions, repeatedly
→ Management depth: I can lead, hire, and structure a team while staying hands-on in the code

Ideal missions:
— AI Product from scratch
— Full product build: idea → scoped → beta testers → production
— Technical architecture audit and roadmap
— Engineering team setup and scaling (early-stage startups)

Based in France. Remote-first. Available now.
  • Arabic

    Native or bilingual

  • French

    Fluent

  • English

    Fluent

Can work on-site
Paris (up to 50km)

Experience

  • Terracall
    CTO & Cofounder | AI Telecom Product
    TELECOMMUNICATIONS
    May 2025 - Today (1 year and 1 month)
    Paris, France
    Built a production-grade AI telecom product from zero with a 3-engineer team — owning every technical and operational layer.

    ▸ Telephony: Asterisk PBX, Dialplan (written personally), SIP stack, SMPP gateway, WebSocket real-time call handling, IVR, MNO/MNE API integration (pricing, roaming config)
    ▸ Voice AI pipeline: achieved 1.5s end-to-end latency (real-time ASR + LLM + TTS + VAD) — designed, built and tuned end-to-end
    ▸ Async call analysis pipeline: post-call data extraction, automatic email generation, CRM auto-fill, task automation for sales and SDR teams
    ▸ CRM engine: generic OAuth 2.0 integration framework covering 10+ platforms (Salesforce, HubSpot, Dynamics…) — new connectors added without standalone dev per platform
    ▸ Databases: MongoDB cluster management, replica sets, schema design, aggregation pipelines, indexing optimisation; Redis + BullMQ for async job queues, API caching, session management, rate limiting
    ▸ DevOps: CI/CD pipelines (GitHub Actions), IaC with Pulumi, Kubernetes on Scaleway, zero-downtime deployments, monitoring & alerting
    ▸ Design → Prod: Figma UI → Next.js frontend → NestJS backend → infra → automated deployment
    ▸ Support: HubSpot ticketing + live chat, AI assistant integration with custom knowledge base — full client onboarding and success management
    ▸ Pre-sales: technical demos, solution scoping, proposal support, and client negotiations alongside the sales team

    Results:
    → €4K MRR with zero dedicated sales staff — entirely founder-led
    → Infra costs controlled via startup credit programmes (Google, Microsoft, MongoDB Atlas, Scaleway) + dynamic ASR/LLM routing by task complexity
    Product Development Voice AI Team management BullMQ Redis
  • PLUG & TEL
    Head of Product Development · Startup Incubation · AI Telecom · Product Strategy · Team Creation
    TELECOMMUNICATIONS
    December 2023 - May 2025 (1 year and 5 months)
    Île-de-France, France
    PLUG & TEL is the parent company behind Terracall. As Head of Product Development, I led the full incubation of Terracall — from raw idea to a spun-out, commercially operating company.

    ▸ Product inception: defined the product vision, market positioning, and initial technical architecture from scratch
    ▸ Business foundation: built the business plan, prepared funding applications, and aligned the technical roadmap with strategic and financial goals
    ▸ MVP execution: led the full development cycle from concept to MVP — specs, roadmap, delivery
    ▸ Team creation: recruited and structured both the product and engineering departments from zero — defined roles, organised squads by scope and skillset
    ▸ Agile setup: implemented agile delivery processes and sprint cadences to keep a small team shipping fast
    ▸ Tech & innovation: led strategic technology watch and defined infrastructure and software architecture standards
    ▸ Spin-out: successfully transitioned Terracall from an internal incubation project into an independent entity with its own product, team, and commercial traction

    Results:
    → 0 → operational AI telecom product in under 18 months
    → Secured early traction and validated market demand before spin-out
    → Built the team and processes that allowed Terracall to operate independently
    AI Automation Product management Team management
  • Zaion
    Technical Lead | Head of Engineering | Head of Product
    RETAIL (LARGE RETAILERS)
    October 2019 - November 2023 (4 years and 1 month)
    Paris, France
    5-year journey from end-of-study intern to executive committee — absorbing a new scope at every step.

    Engineering leadership:
    ▸ Built team from 1 → 8 engineers + 2 DevOps — full hiring cycle (JDs, LinkedIn sourcing, technical interviews, offers, salary reviews, bonuses)
    ▸ Managed scope conflicts between engineers, handled a redundancy under financial constraint (evaluation, selection, documentation)
    ▸ Absorbed PM/PO team mid-flight after manager departure — led both engineering and product simultaneously
    ▸ Built engineering culture from scratch: dev lifecycle, code review standards, security reviews, OKRs for C-level
    ▸ AWS migration: on-premise → cloud, –40% infra cost via right-sizing and auto-scaling
    ▸ Deployed self-hosted ASR to replace external provider — significant recurring cost savings
    ▸ Incident management: full infra provider outage recovered in 24h under client and internal pressure (PCA)

    Product leadership:
    ▸ Launched Zaion Analytics, Zaion Assistant, Zaion Voice Analytics — deployed at 50+ French enterprise clients: Carglass, Edenred, La Banque Postale
    ▸ Voice Analytics opened a net-new revenue stream for the company
    Team management Product management

Recommendations

Be the first to recommend Wassim

Help this freelancer shine by sharing your experience working together.

These freelancer profiles also match your criteria

AgathaA

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

2

BaptisteB

Baptiste Duhen

Fullstack developer

4.6

(4)

5

AmedA

Amed Hamou

Senior Lead Developer

4

(2)

7

AudreyA

Audrey Champion

Web developer

4.3

(3)

4

Education

  • Software Engineer
    National Institute of Applied Science and Technology
    2019
  • Product-led Certification Docker Essentials: Extend Your Apps With Containers Product Analytics Certification
    Product-led Certification Docker Essentials: Extend Your Apps With Containers Product Analytics Certification

Skill set

Categories