Available for collaborations

Hi, I’m Konrad.LeadFullStackEngineer

I design the API, model the database, and build the pixel-perfect interface on top. Currently shipping production platforms in healthcare, e-learning and manufacturing.

Wrocław, Poland

Scroll

About

Engineer who treats the whole stack like one product.

I’m a Lead Full Stack Engineer building end-to-end web products in TypeScript. Right now I’m the sole engineer on a medical SaaS platform used by hospitals and residency programs across the U.S., and I run the team and client side of the agency’s other projects.

In the five years since a help-desk internship started it all, I’ve also shipped an e-learning platform, moved a manufacturing client off WordPress, and rebuilt an authentication system with password hashing and MFA. I contribute to the open-source projects my stack depends on.

Outside of code: photography, music and travel, where most of my better product ideas come from.

Years shipping production

Industries shipped to

Tech across the stack

Experience

A short trail from help desk to full stack.

Jan 2026 — Present · Poznań Metro Area
Lead Full Stack Engineer
Full Stack House
Running client products end-to-end: scoping with the client, architecture and infrastructure, production releases, and the team that ships them.
- Sole engineer and technical owner of a medical SaaS platform used by hospitals and residency programs across the U.S.
- Own observability and cloud infrastructure (New Relic with Slack alerting, Azure, CI/CD, database migrations) and handle production incidents across a hybrid .NET/Node stack.
- Delivered major product areas of an LSAT prep platform (Next.js + NestJS): a practice-test launcher with history, timing modes and per-test analytics; bootcamp quizzes with results and retries; a study-plan map and a searchable workout/routine library; a progress dashboard with charts.
- Built a feature-flag admin toggle, led an app-wide typography redesign, and parallelized CI test jobs.
- Lead the manufacturing client account: a solo migration from WordPress to a multilingual Next.js 15 frontend with Payload CMS 3 and PostgreSQL.
- Coordinate an international team (task writing, code review) and act as primary technical contact for clients, with weekly status reports.
- Rebuilt the agency’s marketing website with a new illustrated visual language and a case-study gallery; localized it for the Polish market and polished the overall experience.
- Ran the technical side of a hiring round: designed the take-home assignment, reviewed submissions and shortlisted candidates for interviews.
Next.jsNestJSAzureNew RelicPostgreSQLPayload CMS
Jul 2024 — Jan 2026 · Poznań Metro Area
Full Stack Engineer
Full Stack House
Full-stack work on a U.S. medical SaaS platform for residency programs (ASP.NET, NestJS, React, MS SQL), shipping features across every layer.
- Led the credential-security overhaul: migrated every user password from plaintext to bcrypt across the .NET and Node backends and stored procedures, including a worker that hashed existing passwords in bulk, then removed plaintext passwords entirely.
- Implemented Multi-Factor Authentication (email and SMS, 10DLC-compliant) and account-security features: password-reuse prevention, remote session termination, account lockout and phone verification.
- Built new product modules end-to-end, from database and API to UI: program evaluation workflows with multi-step reporting and role-based dashboards for hospital administrators, plus data import from an external residency system.
- Contributed to the company’s open-source component library and migrated it to a client-owned fork.
ASP.NETNestJSReactMS SQLTypeScript
Mar 2024 — Jul 2024 · Poznań Metro Area
Front-end Engineer
Full Stack House
Front-end work on the same medical SaaS platform used by hospitals and residency programs across the U.S.
- Turned Figma designs into responsive, pixel-perfect dashboards, components and views.
- Independently implemented the client’s marketing website.
- Consulted with the client to define feature requirements and align development with business needs.
- Wrote Playwright end-to-end tests to prevent regressions, and refactored legacy code for maintainability.
- Reviewed teammates’ pull requests, flagging regressions and keeping the UI consistent with the design system.
ReactNext.jsTypeScriptPlaywrightSentry
Jul 2023 — Aug 2023 · Legnica, Poland
Web Developer Intern
Studio Reklamy i Druku FTPrint
- Developed and maintained the company website.
- Designed user interfaces in Figma.
- Implemented features and interactive elements with HTML, CSS and JavaScript.
HTMLCSSJavaScriptFigma
Jun 2022 — Jul 2022 · Ścinawa, Poland
IT Support Specialist Intern
Urząd Miasta i Gminy Ścinawa
- Operated the municipal system for tracking stove declarations.
- Resolved technical issues and troubleshot IT problems for employees.
- Provided direct technical support for daily office operations.
Help DeskTechnical Support
Jun 2021 — Jul 2021 · Ścinawa, Poland
IT Support Specialist Intern
Urząd Miasta i Gminy Ścinawa
- Operated a speech-to-text system transcribing city council meetings for official records.
- Provided IT support and troubleshooting for staff.
- Maintained office equipment and infrastructure.
Help DeskTechnical Support

Skills

The toolkit I reach for.

Whatever the layer of the stack, I’ve probably shipped something on it. Here’s the day-to-day.

TypeScript/Next.js/React/NestJS/.NET/PostgreSQL/Tailwind/Playwright/Redis/Node.js/Vitest/Sentry/C#/Prisma/MS SQL/Firebase/Electron/Figma/Payload CMS/Radix UI/Headless UI/Telnyx/New Relic/PostHog/Airtable/GitHub Actions/Plasmic/TypeScript/Next.js/React/NestJS/.NET/PostgreSQL/Tailwind/Playwright/Redis/Node.js/Vitest/Sentry/C#/Prisma/MS SQL/Firebase/Electron/Figma/Payload CMS/Radix UI/Headless UI/Telnyx/New Relic/PostHog/Airtable/GitHub Actions/Plasmic/