Sergey Petrelevich
Techlead at Squad
Moscow, Moscow City, Russia
Summary
👤
Senior🎓
Top SchoolSergey Petrelevich is a tech lead with 9 years of recent experience building high-performance backend systems for payments and financial institutions, currently guiding the technical and product direction at startup Squad. He specializes in modern Java ecosystems (Java 21, Spring WebFlux), event-driven architectures (Kafka, gRPC, RabbitMQ) and low-latency networking (NIO, Vert.x), with hands-on experience integrating C, Lua and Python components for Envoy/Nginx and ML. His background includes mission-critical roles at NSPK, Paysend, Alfa-Bank and major international banks, where he worked on authorization, payment platform and blockchain-adjacent systems. An experienced developer-test practitioner, his open-source contributions show strong Spring Boot design and JUnit-backed testing for REST and messaging workflows. He combines systems-level understanding from early C/C++ and real-time control work with recent cloud-native and reactive design patterns, making him effective at both architectural decisions and detailed implementation. Colleagues rely on him for end-to-end delivery spanning design, coding, and DevOps in security-sensitive environments.
9 years of coding experience
21 years of employment as a software developer
Engineer's degree Industrial electronics, Engineer's degree Industrial electronics at Magnitogorsk State Technical University named after G.I. Nosov (MSTU) 
Русский, Английский
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (10)
javas10
rest-api10
junit10
dependency-injection10
java10
spring-boot10
testing10
application9
web-application9
develop9
Programming languages (5)
Github contributions (5)
OtusTeam/Spring
Mar 2020 - Jan 2023
Role in this project:
Back-end Developer
Back-end DeveloperContributions:23 commits, 98 pushes in 2 years 10 months
Contributions summary:Sergey primarily focused on building and testing a Spring Boot application, as evidenced by the commit messages and code changes. The commits demonstrate the implementation of REST controllers and services, along with the integration of a messaging system using a custom messager starter, showcasing a strong understanding of Spring Boot features and dependency injection. Furthermore, the user incorporated testing using JUnit and mocking, to assure the correctness of the implemented application logic.
petrelevich/otus_java_2020_03
Mar 2020 - Aug 2020
Contributions:64 commits, 51 pushes, 1 branch in 5 months
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