Available for full-time roles and contracts
Aleksis Lesieur
Delivered measurable impact through backend optimization, infrastructure modernization, CI/CD acceleration, and enhanced production reliability.
Specialized in Django, FastAPI, data pipelines, scalable distributed architectures, and cloud-native deployments.
I design and build backends that handle growth—async APIs, ETL pipelines, and distributed architectures tuned for real production load.
From schema validation to monitoring and CI/CD, I focus on systems that stay up, recover fast, and fail in predictable ways.
Beyond feature delivery, I look at infrastructure spend, query efficiency, and deployment workflows to improve your bottom line.
Platforms and backends built for active business use.
OpenAI + Express.js + Supabase + Prisma + Next.js + Google Cloud + OAuth + Saas + CI/CD
Implemented MergeGuard, an AI agent that automates pull request management by integrating with GitHub APIs, utilizing OpenAI for natural language processing to analyze code changes and provide actionable feedback to developers.
Visit project →Express.js + Mongodb + Google OAuth + WebSockets + Fairness Algorithm + CI/CD
Implemented CoilFlip, a fair and transparent casino game with real-time WebSocket updates, integrated with Google OAuth for secure user authentication, and a fairness algorithm ensuring transparent gameplay.
Visit project →React Vite + Typescript + Node.js + Supabase + Pumpfun SDK + CI/CD + Admin Dashboard
Built a memecoin donation platform with real-time token price tracking, user-friendly donation flows, and an admin dashboard for campaign management, leveraging the Pumpfun SDK for seamless cryptocurrency transactions.
Visit project →Python + FastAPI + Data Pipeline + CI/CD + Google Cloud
Architected scalable Python ETL pipelines for structured sports data ingestion, processing large datasets including players, clubs, leagues, and agencies with normalized relational mapping.
Visit project →Rust + Actix Web + PostgreSQL + Docker + CI/CD + Twitter API
Developed Stakit Twitter Raid System Backend Development, a Rust-based backend service for managing Twitter raid events, integrating with the Twitter API to handle real-time data processing.
Visit project →Typescript + Express.js + PostgreSQL + Redis + CI/CD + AWS
Delivered a Typescript Backend system integrating with Auction Smart Contract, and DAO Proposals Management System, handling high-throughput transactions and ensuring data integrity with PostgreSQL.
Visit project →Typescript + Express.js + REST API + PostgreSQL + Docker + CI/CD
Shipped a backend system for a predicition market on EVM, interacting with prediction market samrt contract, handling user bets, and providing real-time updates on market outcomes.
Visit project →Python + Django + REST API + JavaScript + CI/CD + Payment Gateway Integration + Security
Built a donation platform for a non-profit organization, integrating with payment gateways and providing a seamless user experience for donors.
Visit project →Rust + Rocket + PostgreSQL + Diesel + Tokio + Async
Orchestrated scalable Rust backend architecture integrating APIs and smart contracts, handling 10k+ monthly marketplace transactions with reduced latency and improved throughput.
Visit project →I build for operators and end users—not demos. That means validation layers, observability, automated tests, and clear rollback paths from day one.
Python, FastAPI, Django, PostgreSQL, Redis, and cloud-native delivery are my core stack. I also work across ETL, real-time services, and platform modernization.
Recent work includes faster ingestion, lower infra bills, higher uptime, and quicker releases—tied to metrics stakeholders actually care about.
Technologies and tools used for modern product delivery.
Roles and outcomes from backend, data, and platform engineering.
10/2025 - Present
07/2024 - 09/2025
01/2023 - 06/2024
03/2020 - 08/2022
08/2018 - 12/2019
Quick answers on process, technology, and support.
I work on API platforms, SaaS backends, data pipelines, real-time services, and system modernization projects. Most engagements focus on scale, reliability, and delivery speed.