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Kostyantyn Maltsev

@kostyantynmaltsev

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Senior software developer with extensive experience in frontend technologies.

Czechia

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What I'm looking for

I am looking for a role that challenges my skills and offers opportunities for growth in a collaborative environment.

As a Senior Software Developer with over a decade of experience, I specialize in creating high-performance applications using modern technologies. My journey began as a junior Ruby on Rails developer, and I have since evolved into a key player in the development of IPTV and OTT solutions. Currently, I am contributing to RTL Deutschland GmbH, where I lead frontend development for embedded devices, ensuring seamless integration and performance for millions of users.

Throughout my career, I have demonstrated a strong ability to establish delivery processes and code conventions within international teams. My work at nangu.TV involved developing applications for various platforms, including Samsung TV and Android, which catered to over a million active users. I am passionate about code refinement, automated testing, and collaborating with cross-functional teams to deliver exceptional products.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Developer

Current

RTL Deutchland GmbH

Jan 2022 - Present (3 years 4 months)

Developing IPTV/OTT frontend applications for embedded devices, including set-top box applications using LightningJS.io. Responsible for code refinement, documentation, and liaising with partners. Contributed to LightningJS.io with merged pull requests.

TypeScript React Git Agile Documentation Automated Testing

Frontend Developer

nangu.TV

Jan 2018 - Jan 2022 (3 years 11 months)

Developed frontend applications for IPTV and OTT providers, focusing on performance across multiple platforms including Samsung TV and iOS. Managed a single codebase for various devices, serving over a million active users.

JavaScript React React Native Performance Optimization Cross Platform Development Agile User Experience

Mobile Application Developer

WDF, s.r.o.

Jan 2017 - Jan 2018 (1 year)

Developed mobile applications using React Native and React for various clients, including a B2B platform and a football club app. Managed deployment processes and tools for applications.

React Native React Mobile Development B2B Deployment Python Agile CRM Systems

Software Developer

Springtide Ventures, s.r.o. (KKCG)

Mar 2013 - Jan 2017 (3 years 10 months)

Worked on internal applications for various clients, including invoice processing and dispatching systems using React and Angular. Focused on building user-friendly interfaces and efficient systems.

React Angular User Interface Design Agile Documentation

IT Infrastructure Developer

1188 - Informační linky a.s.

Jul 2012 - Mar 2013 (8 months)

Rebuilt IT infrastructure for a large company, implemented search engine solutions, and optimized applications for high load balancing. Developed internal applications using Haskell.

Haskell Elasticsearch Load Balancing Infrastructure Optimization Agile

Junior RubyOnRails Developer

Hexmotive s.r.o.

Aug 2010 - Jul 2012 (1 year 11 months)

Started career as a junior developer focusing on RubyOnRails projects. Contributed to various websites and applications, gaining foundational experience in web development.

Web Development Agile Team Collaboration Code Development Application Design