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I'm Nikolai Volchkov, a Senior Android Developer with over 6 years of experience, including 3 in fintech. I specialize in building high-performance Android apps with clean, maintainable code and a strong focus on user-centric design. I enjoy working in agile environments, collaborating with designers, analysts, and cross-functional teams to deliver scalable features end-to-end, optimize performance, and mentor teammates.…I'm Nikolai Volchkov, a Senior Android Developer with over 6 years of experience, including 3 in fintech. I specialize in building high-performance Android apps with clean, maintainable code and a strong focus on user-centric design. I enjoy working in agile environments, collaborating with designers, analysts, and cross-functional teams to deliver scalable features end-to-end, optimize performance, and mentor teammates.

Nikolai Volchkov

App Developer, Web Developer, Programmer, +2

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I'm Nikolai Volchkov, a Senior Android Developer with over 6 years of experience, including 3 in fintech. I specialize in building high-performance Android apps with clean, maintainable code and a strong focus on user-centric design. I enjoy working in agile environments, collaborating with designers, analysts, and cross-functional teams to deliver scalable features end-to-end, optimize performance, and mentor teammates.…I'm Nikolai Volchkov, a Senior Android Developer with over 6 years of experience, including 3 in fintech. I specialize in building high-performance Android apps with clean, maintainable code and a strong focus on user-centric design. I enjoy working in agile environments, collaborating with designers, analysts, and cross-functional teams to deliver scalable features end-to-end, optimize performance, and mentor teammates.

Available to hire

I’m Nikolai Volchkov, a Senior Android Developer with over 6 years of experience, including 3 in fintech. I specialize in building high-performance Android apps with clean, maintainable code and a strong focus on user-centric design.

I enjoy working in agile environments, collaborating with designers, analysts, and cross-functional teams to deliver scalable features end-to-end, optimize performance, and mentor teammates.

Skills

Experience Level

Expert

Expert

Expert

Expert

Work Experience

Senior Android Developer at Devexperts (International FinTech Company)

January 1, 2022 - Present

Led the refactoring of a legacy Java codebase to Kotlin using MVVM, implemented Jetpack Compose, Dependency Injection, and modularization to improve maintainability and scalability. Delivered key Android features, including a redesigned portfolio screen increasing user retention by 12%. Collaborated with designers and analysts to align UX with business goals; oversaw QA, releases, and post-launch analysis via Firebase Crashlytics. Resolved critical bugs and memory leaks, boosting performance by 20% and reducing memory-related crashes to zero. Established architecture guidelines and improved documentation, reducing onboarding time by 30%. Participated in code reviews and mentorship; managed product releases to Google Play Store.

Android Developer at Bacca (Corporate Mobile Solutions)

March 1, 2019 - December 31, 2021

Contributed to a large-scale Cashback Banking Android app, implemented new features and resolved critical bugs to improve reliability for millions of active users. Delivered end-to-end Android features from UI design to core business logic using Kotlin and modern architecture components. Worked with clients and cross-functional teams to design and build a new Android application from scratch, translating business requirements into scalable features. Developed features for an Automated Payment System for public transport terminals and ensured robust performance across varied hardware. Mentored newcomers and led code reviews to promote clarity and collaboration.