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Krzysztof BanaczykKB
Looking for a job

Krzysztof Banaczyk

@krzysztofbanaczyk

Senior iOS Engineer at Big Blue Marble, improving tvOS apps and building real-time healthcare systems.

Poland
Message

What I'm looking for

I'm open to remote work with global teams and B2B contract or UoP opportunities.

At Big Blue Marble, I maintained and customized tvOS applications for multiple clients, improving performance, stability, and user experience across product configurations. I also proposed and implemented technical and process improvements to development workflows.

Through Callstack, I designed and implemented reliability-critical real-time communication between Apple Watch and iPhone for medically sensitive biometric data synchronization. I’ve also delivered iOS products across healthcare, SaaS, and consumer domains, including a production e-learning product at Funmedia and NFC-based mobile payment experiences at NextApps.

Experience

Work history, roles, and key accomplishments

BM
Current

Senior tvOS Engineer

Big Blue Marble

Jul 2026 - Present (3 months)

Proposed and implemented technical and process improvements, enhancing development workflows and strengthening collaboration between UX/UI designers and engineering teams. Maintained and customized tvOS applications for multiple clients, improving performance, stability, and user experience.

CA

Apple Watch Technical Lead | Senior iOS Engineer

Callstack

Jul 2023 - Apr 2026 (2 years 9 months)

Designed and implemented reliability-critical real-time communication between Apple Watch and iPhone for medically sensitive biometric data synchronization. Collaborated with US stakeholders and drove technical decisions around architecture, maintainability, release readiness, and compliance with regulated software quality processes.

CO

Senior iOS Engineer

Codibly

Sep 2021 - Jun 2023 (1 year 9 months)

Led end-to-end delivery of iOS applications across commercial product initiatives, owning architecture, implementation, and technical decisions. Built advanced mobile experiences involving AR, UWB, BLE, GraphQL, and real-time connectivity.

OP

Swift Mentor (Part-time)

OpenClassrooms

Sep 2017 - Jan 2023 (5 years 4 months)

Mentored 10+ aspiring iOS developers through a structured long-term mobile engineering program, providing technical guidance, code reviews, and architecture feedback. Helped developers build practical engineering skills across Swift, iOS architecture, and production-quality mobile development practices.

FU

Product Leader | Senior iOS Engineer

Funmedia

Jan 2020 - Mar 2021 (1 year 2 months)

Built and led delivery of a production mobile e-learning SaaS product from the ground up, owning iOS architecture, implementation, and technical direction. Recruited and technically led Android development, aligning architecture and delivery across the mobile product scope.

Education

Degrees, certifications, and relevant coursework

Wrocław University of Technology logoWT

Wrocław University of Technology

Master of Science in Engineering, Engineering

2009 - 2014

Master of Science in Engineering degree from Wrocław University of Technology, completed in 2014.

Tech stack

Software and tools used professionally

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