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Hi there! I'm Aleksis Jonas Lesieur, a full-stack developer specializing in data-driven web apps, cloud infrastructure, and scalable backend services. Over the past 8+ years, I've built end-to-end platforms using Rust, Python, Node.js, React, and Next.js, focusing on performance, reliability, and observability. I love turning big datasets into actionable insights—ETL pipelines, ML-driven features, and tooling that helps teams work faster. I enjoy collaboration across frontend, backend, and data engineering, and I'm always learning new technologies to ship productive, maintainable software.…Hi there! I'm Aleksis Jonas Lesieur, a full-stack developer specializing in data-driven web apps, cloud infrastructure, and scalable backend services. Over the past 8+ years, I've built end-to-end platforms using Rust, Python, Node.js, React, and Next.js, focusing on performance, reliability, and observability. I love turning big datasets into actionable insights—ETL pipelines, ML-driven features, and tooling that helps teams work faster. I enjoy collaboration across frontend, backend, and data engineering, and I'm always learning new technologies to ship productive, maintainable software.

Aleksis Jonas Lesieur

Full Stack Developer, Web Developer, Front-End Developer, +3

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Hi there! I'm Aleksis Jonas Lesieur, a full-stack developer specializing in data-driven web apps, cloud infrastructure, and scalable backend services. Over the past 8+ years, I've built end-to-end platforms using Rust, Python, Node.js, React, and Next.js, focusing on performance, reliability, and observability. I love turning big datasets into actionable insights—ETL pipelines, ML-driven features, and tooling that helps teams work faster. I enjoy collaboration across frontend, backend, and data engineering, and I'm always learning new technologies to ship productive, maintainable software.…Hi there! I'm Aleksis Jonas Lesieur, a full-stack developer specializing in data-driven web apps, cloud infrastructure, and scalable backend services. Over the past 8+ years, I've built end-to-end platforms using Rust, Python, Node.js, React, and Next.js, focusing on performance, reliability, and observability. I love turning big datasets into actionable insights—ETL pipelines, ML-driven features, and tooling that helps teams work faster. I enjoy collaboration across frontend, backend, and data engineering, and I'm always learning new technologies to ship productive, maintainable software.

Available to hire

Hi there! I’m Aleksis Jonas Lesieur, a full-stack developer specializing in data-driven web apps, cloud infrastructure, and scalable backend services. Over the past 8+ years, I’ve built end-to-end platforms using Rust, Python, Node.js, React, and Next.js, focusing on performance, reliability, and observability.

I love turning big datasets into actionable insights—ETL pipelines, ML-driven features, and tooling that helps teams work faster. I enjoy collaboration across frontend, backend, and data engineering, and I’m always learning new technologies to ship productive, maintainable software.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Lithuanian

Fluent

French

Advanced

Work Experience

Frontend Developer at Refooro

January 1, 2023 - June 1, 2024

Full-time remote frontend developer; designed and implemented the company's landing page, focusing on responsive layout, performance and usability. Developed and integrated UI animations and interactive elements to enhance user experience and visual engagement. Collaborated with the team to improve the overall website interface and accessibility. Translated vehicle parts documentation and product content from English to French, enabling accurate localization and multilingual readiness.

Full-Stack Web3 Developer (Contractor) at Footy Labs

October 1, 2025 - Present

Designed and implemented an ETL pipeline to scrape and process football data (players, clubs, leagues, and agencies) from the transfer market. Built backend services using Python and FastAPI, leveraging GraphQL for efficient large-scale data ingestion and processing. Developed a Next.js frontend and integrated backend APIs to support data-driven workflows. Architected and deployed cloud infrastructure on Google Cloud (Cloud Run, Compute Instances, Cloud Build, Buckets, and CI/CD pipelines) to automate data ingestion and processing. Implemented automated data normalization and entity assignment logic to maintain consistent relationships across datasets.

Full-Stack Web3 Developer at Tapestry

July 1, 2024 - September 1, 2025

Full-Stack Web3 developer; on-chain token work (Anchor framework) for a Solana-based token; conducted security and efficiency auditing; built a Next.js UI and REST/API integration to support data-driven workflows. Accelerated app development for a hackathon by implementing private wallet integration and token swap features for the Solana Starter Kit project.

Frontend Developer at Remoto

January 1, 2023 - June 1, 2024

Designed and implemented the company's landing page, focusing on responsive layout, performance and usability. Developed UI animations and interactive elements to enhance user experience and visual engagement. Collaborated with the team to improve the overall website interface and accessibility. Translated vehicle parts documentation and product content from English to French, enabling accurate localization and multilingual readiness.

Full Stack Developer at Foster Marketplace

March 1, 2020 - August 1, 2022

Full-stack remote marketplace builder on Solana enabling creators to sell fashion and art with powerful native tools and e-commerce capabilities. Launched, sold, and scaled digital and physical goods in one platform.

Web And Digital Solutions at Cingant

August 1, 2018 - December 1, 2019

Web and digital solution provider; frontend-focused role improving UI and frontend architecture; collaborated to enhance overall website interface and accessibility.

Software Engineer at Footy Labs

October 1, 2025 - Present

AI-driven football analytics platform providing data analytics and performance insights for clubs, coaches and players. Specializes in data pipelines, machine learning, and sports analytics to transform large datasets into actionable decision-making tools.

Full-Stack/Backend Developer at Tapestry

July 1, 2024 - September 1, 2025

Web3 social infrastructure platform enabling on-chain identity, social graph, and developer APIs that enable apps to integrate feeds, follows, and engagement features. Focused on building scalable backend services and tooling for decentralized applications.

Frontend Developer at Fleet Management SaaS (Unknown)

January 1, 2023 - April 1, 2024

Fleet management SaaS platform for truck fleet maintenance. Designed a responsive landing page using React components, animated UI, and improved frontend usability across internal tools. Also contributed to backend data platform using Python and FastAPI for real-time data processing.

Backend/Full-Stack Developer at Foster Marketplace

March 1, 2020 - August 1, 2022

Peer-to-peer marketplace built on Solana, enabling creators to sell digital and physical goods through integrated e-commerce tooling. Implemented Rust-based smart contracts for NFT minting and on-chain interactions; contributed to backend services, payments, and scalable marketplace infrastructure.

Web Developer at Cingant

August 1, 2018 - December 1, 2019

Web and Digital Solutions provider offering web and mobile application development, UI/UX design, and digital marketing services (SEO, PPC, SMO), plus video and animation production for business clients.