Curriculum Vitae

Wojciech Zieliński

Full Stack Developer

Download Back

wojtekzielinski96@gmail.com

Phone

+48 783 781 370

City

Cracow, Poland

GitHub

github.com/wojtek960506

linkedin.com/in/wojciech-zielinski-69944b159

Portfolio

devonion.com

Adaptable Software Engineer with 5 years of experience in both backend (Python, Node.js, MongoDB, PostgreSQL) and frontend (TypeScript, React) development, working in international and cross-functional teams.

Skilled in designing and implementing end-to-end solutions, including backend services, REST APIs and frontend interfaces. Quick to learn new technologies and take ownership of complex features.

In my own projects, I am passionate about creating full stack systems that help people organize their data.

Full Stack Developer

Sufler AI

04.2026 - present

Joined an existing AI assistant product and took ownership of frontend and API-layer improvements, focusing on polishing and extending the app
Building and refining React and TypeScript UI flows for authentication, session handling, user and admin views, document management, and session details
Working on enhancing API layer functionality using FastAPI and PostgreSQL
Improving real-time communication and integration between the frontend and backend through WebSocket-based audio and message flows

Software Engineer

Personal Project (FinOnion)

10.2025 - present

Designing and implementing a personal finance tracking application for learning and private use
Backend: Node.js, Fastify, MongoDB; Frontend: Next.js, React, TypeScript, Tailwind CSS
Developing a Python module to parse and import legacy data
Continuously extending the app to improve data analysis and usability

Career break

Travel & Technical Upskilling

12.2024 - 09.2025

Undertook extended independent travel, managing planning, logistics and budgeting
Studied and practiced JavaScript, TypeScript, React, Node.js and Python
Implemented small applications and code experiments to refresh core concepts and tooling

Senior Software Engineer

MicroStrategy

02.2023 - 11.2024

Served as a lead frontend developer designing and maintaining tools for Python automation scripts
Built complex frontend features with TypeScript and React, integrating internal REST APIs
Collaborated across teams and delivered knowledge-sharing sessions
Produced robust automated tests with Gherkin and Python

Software Engineer

MicroStrategy

05.2021 - 01.2023

Transitioned from backend Python work to frontend development with TypeScript and React
Integrated data from internal REST APIs into frontend components
Developed utilities and UIs for the mstrio-py automation ecosystem
Prepared Python example scripts and improved automated test coverage

Associate Software Engineer

MicroStrategy

02.2020 - 04.2021

Contributed to MicroStrategy's official Python automation library, mstrio-py
Onboarded new team members by explaining workflows, architecture and tools
Wrote automated tests in a frontend repository
Collaborated with backend and platform teams to improve API reliability

Software Engineer

Innsoft

08.2019 - 12.2019

Developed backend components for the energy sector using Java and relational databases
Collaborated within a small engineering team and strengthened communication skills

Bachelor of Engineering, Computer Science

Institution: Warsaw University of Technology

Period: 2016 - 2020

Algorithms and Data Structures, Information Systems Engineering, Database Systems
2 semesters at Czech Technical University in Prague via Erasmus+
Thesis: client-server system for saving and analyzing workouts with a mobile client

JavaScript
TypeScript
React
Next.js
Node.js
Python
MongoDB
Tailwind CSS
Jest
React Testing Library
HTML
CSS
English B2

Mountain hiking
Climbing
Cycling and bikepacking
Motorcycle riding
Music and playing piano
Football
Formula 1
MotoGP
Learning foreign languages