Senior Android Software Engineer with 7+ years of experience delivering high-quality, scalable mobile applications. Contributed to the development of a next-generation SME banking app, surpassing 100,000+ downloads and maintaining a 4.8 rating on Google Play, significantly boosting user engagement. Proficient in Kotlin, Java, and automated testing, with a strong focus on performance, reliability, and clean architecture. Known for driving innovation, ensuring technical excellence, and delivering impactful solutions in dynamic, fast-paced environments.

Radu Cosac

Senior Android Software Engineer with 7+ years of experience delivering high-quality, scalable mobile applications. Contributed to the development of a next-generation SME banking app, surpassing 100,000+ downloads and maintaining a 4.8 rating on Google Play, significantly boosting user engagement. Proficient in Kotlin, Java, and automated testing, with a strong focus on performance, reliability, and clean architecture. Known for driving innovation, ensuring technical excellence, and delivering impactful solutions in dynamic, fast-paced environments.

Available to hire

Senior Android Software Engineer with 7+ years of experience delivering high-quality, scalable mobile applications.
Contributed to the development of a next-generation SME banking app, surpassing 100,000+ downloads and
maintaining a 4.8 rating on Google Play, significantly boosting user engagement.
Proficient in Kotlin, Java, and automated testing, with a strong focus on performance, reliability, and clean
architecture. Known for driving innovation, ensuring technical excellence, and delivering impactful solutions in
dynamic, fast-paced environments.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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Language

Romanian, Moldavian, Moldovan
Fluent
English
Fluent
German
Beginner

Work Experience

Senior Android Software Engineer at Raiffeisen Bank
November 1, 2022 - Present
Contributed to the end-to-end development of high-impact features in a fast-paced, enterprise-grade environment, enhancing digital banking capabilities for SME users. Redeem Deposit: Delivered a Kotlin-based redemption flow, enabling users to withdraw from fixed deposits, streamlining access to funds. Additional Services: Built a flow for requesting debit instruments via mobile, reducing branch workload by ~50% and improving operational efficiency. Direct Debit: Implemented a Jetpack Compose flow for creating and managing direct debit contracts. Achieved 100% adoption, offering users seamless access to bill payments via mobile. Debit Instruments: Enabled users to complete forms in-app and receive required documents by email, improving document delivery speed. Qualified Electronic Signature (QES): Developed profile and account management features signed with QES, eliminating the need for in-branch visits. Special Rates: Enabled Premium users to perform currency exchanges at preferential rates, enhancing value for high-tier clients. Code Modernization: Actively refactored legacy Java code to modern Kotlin and validated Jetpack Compose integrations across modules. Business Alignment: Reported directly to the Product Owner and collaborated with the Business Analyst to align deliverables with quarterly OKRs. Business Analysis Ownership: Temporarily assumed Business Analyst responsibilities, including feature analysis and user story definition, ensuring on- time development in the absence of a BA. Additional Contributions: Improved stability and observability through Dynatrace integration. Integrated automated testing workflows into CI/CD pipelines to accelerate delivery. Worked cross-functionally to implement real-time analytics, boosting user engagement by 30% via personalized insights. Proactively resolved production issues by identifying root causes and deploying effective fixes.
Android Software Engineer at NortonLifeLock (Gen Digital)
November 1, 2022 - October 9, 2025
Contributed to the development of Norton’s Android app by leveraging Avira’s core architecture to enhance functionality and user experience. Implemented Identity Protection features, enforced regional access restrictions for compliance, and improved security.
Junior Android Software Engineer at Cognizant
August 1, 2021 - October 9, 2025
Contributed to cross-domain initiatives in education, health care, and e-commerce, delivering native Android and React Native solutions for enterprise-grade internal platforms and client-facing apps.
Android Software Engineer Intern at Impact Hub
August 31, 2018 - October 9, 2025
Collaborated with 70+ students and educational partners to design impactful learning features, boosting engagement by 40%. Led end-to-end UI/UX design, improving development speed by 25%. Completed Android Essentials and workshops on ideation, monetization, and digital marketing to strengthen technical and business skills
Web Developer at Meta Syndicate
November 30, 2019 - October 9, 2025
Implemented social media authentication flows (YouTube, TikTok, Instagram), enabling seamless onboarding; developed responsive landing pages and integrated blockchain APIs to support a Hold-to-Earn NFT model.
Android Developer Intern at Personal Project (Fitness & Nutrition Android App)
May 1, 2018 - October 9, 2025
Designed and implemented a fitness and nutrition Android application to help users track health and fitness goals.
Android Developer Intern at Personal Project (Charging Status App)
May 1, 2018 - October 9, 2025
Developed an Android application showing the charging status of electric vehicles to improve user experience and vehicle management.

Education

Bachelor of Science in Electronics, Telecommunications and Information Technology at Politehnica University of Bucharest
January 1, 2015 - January 1, 2019
Master of Science in Electronics, Telecommunications and Information Technology at Politehnica University of Bucharest
January 1, 2019 - January 1, 2021
Java Certification at Telecom Academy
January 1, 2017 - October 9, 2025

Qualifications

Java Certification
January 1, 2017 - October 9, 2025
Android Essentials Training
August 1, 2018 - October 9, 2025
Database Design and Programming with SQL Certificate
January 1, 2015 - October 9, 2025

Industry Experience

Software & Internet, Financial Services, Media & Entertainment, Education, Professional Services, Telecommunications, Other, Healthcare, Retail

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
See more

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