Building reliable systems and helping teams turn research into production.

• Email: jakub@tesarek.me
• Phone: +420 721 812 945
• Website: jakub.tesarek.me
• GitHub: github.com/JakubTesarek
• LinkedIn: linkedin.com/in/jakubtesarek

Python Developer Lead — Feb 2024 – Present
Leading the Python development team, overseeing architecture, tooling, and the design of a research framework.
Modernizing the tech stack, improving development workflows, and mentoring engineers.

Highlights:

• Own and maintain the entire Python codebase
• Designed and implemented modular research framework for data scientists
• Introduced new tools and streamlined CI/CD processes
• Supported team growth and technical direction

Tech: Python, FastAPI, Pandas, NumPy, PostgreSQL, Podman, HTCondor, Git

Lead Software Engineer — Mar 2020 – Feb 2024
Led a team building AI-powered services and high-throughput systems for AlmaCareer job boards.

Highlights:

• Designed and operated a distributed search and email platform across multiple job boards
• Built internal frameworks for faster experimentation:
  • Trickster: REST API mocking framework
  • Multitool: prototyping toolkit for data science experiments
• Founded and organized Python Lovers, a monthly internal Python meetup

Tech: Python (Flask, Tornado, FastAPI), Docker, Kafka, Airflow, AWS (Lambda, Fargate, CDK, S3, DynamoDB), MongoDB, Aerospike, Ansible, Nexus, Git

Software Design Engineer — Feb 2014 – Mar 2020
Part of the DevOps team designing, developing, and operating microservices supporting Concur Mobile.

Highlights:

• Led the project to build a GraphQL API layer for Concur Mobile
• Developed User Directory, handling user profiles and authentication
• Built REST APIs for TripIt (travel management) and ExpenseIt (receipt parsing and expense automation)

Tech: Python (Flask, Django), Node.js, PHP (Symfony), Docker, AWS (EC2, S3, SQS, Lambda), Git

Backend PHP Developer — Nov 2013 – Jan 2014
Developed e-commerce platform components and newsletter targeting system.

Tech: PHP, Symfony, Git

Head of R&D — Nov 2010 – Sep 2013
Led a development team building and maintaining the Shoptet online store platform.

Tech: PHP, JavaScript, jQuery, HTML, XML, SVN, Git

• Leading Python development at Qminers
• Playing with Python sandboxing

• Czech: Native
• English: Fluent

Web Development — 2008 – 2010
Bachelor program focused on software and web development.
(Studies interrupted to focus on career.)

Grammar School — 2000 – 2008
Focus on mathematics and IT.

• Trickster — Python service for mocking REST APIs for testing and development.
• Matej Client — PHP client for the MatejAI recommendation engine.
• Pydantic Mongo ORM — Map Pydantic models to MongoDB collections.
• DBGR — Terminal app simplifying interaction with APIs.
• Priority Queue — Thread-safe priority queue with item merging.
• Wordle Solver — Automated solver for the Wordle puzzle (video).

• Power of Metaclasses — (EN, Python) Slides and code for a talk on Python metaclasses.
• Working with Data-Scientists: Survival Guide — (EN, Video) PyCon 2023 talk on collaboration between engineers and data scientists.
• Datový typ ENUM v PHP — (CZ, PHP) Article on enums in PHP.
• Technický dluh — (CZ) Article about technical debt.
• Dependency Injection — (CZ, PHP) Article on dependency injection and inversion of control.

When I’m not coding, I enjoy adventurous pursuits: motorcycling, kickboxing, exploring new places, and honing my skills at shooting sports.

📨 Feel free to reach out if you’d like to chat about Python architecture, developer productivity, or mentoring.