Software engineer · Technical leader
I’m a senior software engineer and technical leader working across backend development, system architecture, and full-stack delivery. My experience includes autonomous retail, payment integrations, energy platforms, and production web systems.
I’m an open-minded problem solver with a practical approach to software. I care about readable code, clear architecture, and solutions that remain understandable after the first release.
I enjoy moving between implementation and the bigger picture: understanding a product, finding the actual constraint, and helping a team deliver without unnecessary complexity.
— Mitchell Hashimoto
That short answer captures the standard I want to keep as AI changes how software is made. I use AI to explore ideas, shorten feedback loops, and remove repetitive work. It saves me time. I still read the code and care about its quality and long-term reliability.
Production software still needs ownership. Someone must understand the architecture, verify the behavior, review the security implications, and be able to operate the system when the happy path ends. If a team cannot explain the code it ships, it does not truly own it.
Senior Web Software Engineer · Tech Lead
Worked with Milo across several periods and roles—from junior and web software engineering to tech lead and senior engineer—with Python developer roles at Unity Group and Netguru in between. Product work spans offshore energy, digital insurance, education, and real estate.
Freelance Software Developer · Self-employed
Independent software engineering practice focused on web applications, system architecture, and production software.
Python Developer · Full-time
Worked on backend systems and integrations for Żabka Nano, including complete payment flows for the autonomous retail platform.
Python Developer · Full-time
Built bespoke Shopify warehousing plugins from the ground up for food-industry operations, adapting the platform to custom inventory and fulfillment workflows.
A fuller employment history and recommendations are available on LinkedIn ↗
Part of Stepwise’s core development team from the very start, designing and building backend and frontend solutions from the ground up. The platform turns offshore operational data into measurable improvements, helping operators establish trusted baselines and track changes in rig time, fuel use, operating cost, and emissions.
Contributed to the platform behind Poland’s network of autonomous stores, with a focus on payment and third-party integrations. The wider system connected customer authorization, payments, in-store hardware, telemetry, and computer-vision events into one operating platform.
Built lead-generation and customer-acquisition systems for businesses in education and real estate, supporting the path from initial interest to a qualified opportunity.
Built a Lemonade-style digital acquisition platform for insurance companies, translating a traditionally complex purchasing journey into a guided online experience.
Designed and built bespoke Shopify warehouse plugins from scratch for food-industry operations. The work extended Shopify around inventory and fulfillment processes that off-the-shelf applications could not support.
EngineeringSystem architecture, API design, CI/CD, performance, and technical leadership. Earlier work also includes Java and Objective-C.
University of Information Technology and Management in Rzeszów
Mobile and Network Technologies
PolishNative
EnglishProfessional working proficiency
Tell me what you’re building or where you’re stuck. Let’s see how I can help.