Daniil Maklakov
Backend developer — Python/FastAPI · TypeScript/Fastify · CRM & API integrations
I build the plumbing between products: API gateways, OAuth2 flows, webhook pipelines and CRM synchronisation that run in production for real clients. Freelance backend developer since late 2025.
Originally a physics engineer, I moved into software through a computer science degree in Strasbourg. I work remotely, deploy and maintain what I ship, and use LLMs daily — both as tools and inside products. Based in France. Open to backend and AI-integration roles.
Experience
Freelance, remote. CRM integrations in Python/FastAPI, deployed and operated on AWS.
Freelance, remote. Meta Business and Instagram APIs synchronised with HubSpot CRM in TypeScript.
Freelance, remote. OAuth 2.0 gateway and synchronisation pipeline across Thumbtack, HubSpot and Zoho. Still in production.
Preceded by a BSc in Engineering Physics, Kazan Federal University (2016 – 2020).
Projects
Replaced the client's no-code Zapier automations with Python pollers and webhook handlers, removing the dependency without changing anything on the CRM side. Keeps GoHighLevel and ServiceTitan in two-way sync: 13+ webhook event types, status mapping, deduplication, plus lead intake from Yelp, Thumbtack and HouseCall Pro. Sanitized production codebase.
Integration platform monorepo: Fastify gateway with HMAC-preserving request forwarding and typed API clients for HubSpot, Aircall, eBay, Meta and Zoho. Sanitized production codebase.
Production OAuth 2.0 reverse proxy for the Thumbtack API: full token lifecycle, FastAPI and PostgreSQL, Dockerised behind nginx, with an internal admin panel. Built in late 2025 and still running unattended.
Real-time multiplayer drawing game with an AI Judge mode: a vision LLM watches the canvas and guesses drawings live. Next.js, Electron, socket.io, Prisma. Built in a 9-person team.
Decision tree implemented from scratch in NumPy, with per-instance explainability via Monte Carlo Shapley-value attribute contributions.
Stack
Backend: Python (FastAPI, httpx), TypeScript (Fastify, Node.js), PostgreSQL
Integrations: OAuth2, REST APIs, webhooks, CRM sync, LLM APIs
Ops: Docker, Linux, nginx, Git, CI/CD
Contact
github.com/McDonnies · linkedin.com/in/maklakov-daniil
English · French · Russian