Jan Szymański

Frontend Developer • Zielona Góra, Lubusz Voivodeship, PL

UX Writing

UI/UX Design

Front-End Development

Available for hire fromNegotiable

Contracts

Developer focused on front-end. Skilled in building MVPs. Freelancer & active open-source contributor. First tech job as 17 year old

1.5 year of experience in software house. Built several conversion-focused landing pages for start-ups. Have experience with creating complex web apps used in production. 1 year of experience working with clients (full-stack & UI/UX) in quickly building MVPs. Active maintainer & contributor to several open-source projects. Worked in marketing-focused teams, optimized their efficiency for business outcomes and supported them from tech. side; experienced in utilizing tools. Skilled in designing web & mobile interfaces; working with designer or without.

Projects

Przystanek MZK

+750 MAU +1500 downloads/mo. ️ 5 Stars in Google Play Store Co-founded a cross-platform, open-source bus tracking mobile app with Ionic Framework, and built extremely-scalable serverless, FaaS-based back-end API using Cloudflare Stack (works without maintenance since 2 years). See More

IoT Eco-Energy Monitor

Laureate in Polish National Olympics of Innovation, Scholarship Co-built open-source project with Material Design UI, Next.js, PWA, InfluxDB, Grafana, Tasmota, MQTT, ESP8266 (+ other components). Wrote a thorough technical documentation. See More

Nowy Kisielin Medicenter

Successful Showcase & Validation of Client’s Idea Freelance MVP rapidly bootstrapped with Postgres, Supabase, and Next.js. See More

School Website Starters

️ +35 GitHub Stars Founded organization that provides public schools with open-source modern, accessibility-focused school websites. Next.js, Vercel, Sentry, React Server Components, Strapi, Storybook, GraphQL, Meilisearch.See More

Frekwencja

+40 GitHub Stars Open-source Language Learning product utilizing Python datasets and multiple APIs, including Google’s. See More

React Static Clutch.co Embed

Open-source npm library for optimizing embeds.

Work History

Front-end Developer & Mentor

AppUniteImplemented rebranding and supported marketing team 4 People Marketing Focused Software House Technology — Next.js, TailwindCSS, React Hook Form, Strapi. Marketing — worked with Google Analytics & Tag Manager and PostHog. Optimized configuration to catch users with ad- blockers (>40%).

Front-end Developer, Design and Copy

Estetify.plInternal beauty salons management and appointment booking 2-6 People Dynamic Startup Software House Technology — web app & landing: React, Next.js, TailwindCSS, React Hook Form, Cypress, Apollo & GraphQL. Teamwork And Ownership — worked in a 6-people team and afterwards, as a sole developer, directly communicating with external client, gathering and meeting business requirements. Marketing — built (design, copywritting, code) and shipped engaging landing page that positively influenced conversion and bounce rate markers & improved search rankings. Worked with Google Analytics and Microsoft Clarity to boost sales. Optimized QA time — been mentored and wrote several unit & E2E test suites using Cypress and Jest. Integrated Services — implemented and worked with services that addressed business needs, incl. Stripe, Sentry, Cypress Cloud and Auth0.

Education

Centrum Kształcenia Zawodowego i Ustawicznego NR2 ELEKTRONIK w Zielonej Górze

Computer Programming2020 - 2025

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