Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Full-Stack Developer with 10+ years of experience designing and delivering scalable web, fintech, and DeFi applications across startups and global enterprises. Proven track record of architecting event-driven systems, building payment and blockchain infrastructure, and shipping high-impact features across frontend, backend, and smart contract layers. Combines strong software architecture and systems-thinking skills with a product-oriented mindset, consistently turning complex business goals into reliable, maintainable technology. Comfortable operating autonomously in remote, cross-functional teams and leveraging AI-assisted development to accelerate delivery.…Full-Stack Developer with 10+ years of experience designing and delivering scalable web, fintech, and DeFi applications across startups and global enterprises. Proven track record of architecting event-driven systems, building payment and blockchain infrastructure, and shipping high-impact features across frontend, backend, and smart contract layers. Combines strong software architecture and systems-thinking skills with a product-oriented mindset, consistently turning complex business goals into reliable, maintainable technology. Comfortable operating autonomously in remote, cross-functional teams and leveraging AI-assisted development to accelerate delivery.

Piotr Ciesiolkiewicz

Full Stack Developer, Web Developer, Front-End Developer, +2





Full-Stack Developer with 10+ years of experience designing and delivering scalable web, fintech, and DeFi applications across startups and global enterprises. Proven track record of architecting event-driven systems, building payment and blockchain infrastructure, and shipping high-impact features across frontend, backend, and smart contract layers. Combines strong software architecture and systems-thinking skills with a product-oriented mindset, consistently turning complex business goals into reliable, maintainable technology. Comfortable operating autonomously in remote, cross-functional teams and leveraging AI-assisted development to accelerate delivery.…Full-Stack Developer with 10+ years of experience designing and delivering scalable web, fintech, and DeFi applications across startups and global enterprises. Proven track record of architecting event-driven systems, building payment and blockchain infrastructure, and shipping high-impact features across frontend, backend, and smart contract layers. Combines strong software architecture and systems-thinking skills with a product-oriented mindset, consistently turning complex business goals into reliable, maintainable technology. Comfortable operating autonomously in remote, cross-functional teams and leveraging AI-assisted development to accelerate delivery.

Available to hire

Full-Stack Developer with 10+ years of experience designing and delivering scalable web, fintech, and DeFi applications across startups and global enterprises. Proven track record of architecting event-driven systems, building payment and blockchain infrastructure, and shipping high-impact features across frontend, backend, and smart contract layers. Combines strong software architecture and systems-thinking skills with a product-oriented mindset, consistently turning complex business goals into reliable, maintainable technology. Comfortable operating autonomously in remote, cross-functional teams and leveraging AI-assisted development to accelerate delivery.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

Polish

Fluent

English

Fluent

Work Experience

Full-Stack Developer at ONCHAIN Labs

February 1, 2024 - February 1, 2026

Proven track record architecting event-driven systems, building payment and blockchain infrastructure, enabling gasless transactions, dynamic fund allocation across multi-chain wallets, and AI-assisted development across frontend, backend, and smart contract layers.

Full-Stack Developer at Lysn

August 1, 2021 - August 1, 2023

Developed and maintained the Lysn platform for therapist–client online booking and consultations; built practitioner tooling and documentation support; introduced a micro-frontend architecture to accelerate delivery; contributed to backend with Python/Django and AWS deployments; led CI/CD improvements.

Full-Stack Developer at Highsnobiety

October 1, 2018 - January 1, 2020

Built core parts of the ecommerce experience, including the product detail page and checkout flow; created endpoints to support exclusive stock; redesigned the frontend with React; implemented CI pipelines and improved app reliability and performance.

Full-Stack Developer at Display Sweets

March 1, 2017 - September 1, 2018

Created interactive showroom experiences; developed a web stack for data-driven marketing and presentations using React, Redux, TypeScript, Node.js; delivered dashboards and marketing assets.

Full-Stack Developer at Drew / udrew

September 1, 2020 - March 1, 2021

Built interactive solutions to streamline design, planning and approval of residential building projects; implemented frontend architecture (React/TypeScript) and backend APIs; integrated cloud services for data handling.

Software Engineer at Nokia Networks

August 1, 2013 - September 1, 2016

Developed software enhancements for telecom networks; contributed to backend services, automation, and customer-facing tools.

Education

Master's degree at Wroclaw University of Science and Technology

January 1, 2014 - January 1, 2016

Engineer’s degree at Wroclaw University of Science and Technology

January 1, 2010 - January 1, 2014

Qualifications

Master's degree in Engineering/Computer Science

January 1, 2014 - January 1, 2016

Engineer’s degree in Control Engineering and Robotics

January 1, 2010 - January 1, 2014

Industry Experience

Software & Internet, Media & Entertainment, Financial Services, Education, Government, Healthcare, Life Sciences, Manufacturing, Retail, Telecommunications, Other