Constantine Gerasimov
@constantinegerasimov
Backend engineer specializing in Java/Kotlin microservices for fintech and security-critical systems.
Russian FederationWhat I'm looking for
Backend Engineer with over 5 years of experience in FinTech development and a total technical background of 12+ years. Expert in building high-load distributed systems and microservices using Java and Kotlin. Proven track record of optimizing system performance (up to 6,000 rps) and delivering business-critical solutions that reduced processing times from days to hours.
Experience
Work history, roles, and key accomplishments
Senior Java/Kotlin Backend Developer
SberTech
Oct 2023 - Jul 2025 (1 year 9 months)
Reduced credit appeal processing time for B2B clients from 3 business days to just 1 hour, resulting in a 75% improvement in efficiency.
Built a modular B2C credit-scoring service that improved processing speed by 30%
Optimized CI/CD pipelines using Jenkins to ensure stable and efficient code delivery.
Mentored and led 3 interns, successfully onboarding all into full-time staff positions.
Middle Java/Kotlin Backend Engineer
Sber
Jun 2020 - Oct 2023 (3 years 4 months)
Engineered and optimized web service performance, increasing throughput from 1,000 to 6,000 requests per second.
Architected and implemented a resilient PostgreSQL database with replication to accelerate data delivery.
Applied Event-driven architecture for microservices, significantly reducing response latency and accelerating feature Time-to-Market.
Intern Backend Developer
Sber
Jun 2020 - Jan 2021 (7 months)
Developed and maintained backend services for SberFiles and SberVideo using Java and Spring Framework with PostgreSQL, supporting production functionality and resolving defects.
Education
Degrees, certifications, and relevant coursework
School 21
Software engineering training program, Software Engineering
2020 -
Completed the School 21 software engineering training program in 2020.
Perm National Research Polytechnic University
Electrical Engineering, Electrical Engineering
2007 - 2010
Grade: 4
Activities and societies: programming microcontrollers. C++ and Java experience.
Studied Electrical Engineering with a focus on Software for Computers and Automated Systems; the program was incomplete.
Tech stack
Software and tools used professionally
Availability
Location
Russian FederationAuthorized to work in
Job categories
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