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Maksim Kosolapov

@mkosolapov

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Lead software engineer building scalable fintech backend systems with Java, Kotlin, Spring, AWS.

Turkey

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What I'm looking for

I’m looking to lead backend engineering for fintech or distributed systems—designing high-throughput services, improving latency and reliability, and using cloud infrastructure and mentoring to help teams ship faster with better quality.

I’m a Lead Software Engineer with 10+ years of experience building scalable backend systems for fintech and distributed systems. I design and launch services from scratch, improve reliability and latency, and focus on performance optimization and cloud infrastructure.

In my recent role, I designed and implemented high-throughput fintech services for a major US online bank, reducing critical service latency by 50% after resolving a memory leak. I also reduced duplicate processing in idempotent APIs by 80% using an AOP-based framework, and lowered development costs by 5% while increasing delivery speed by 10% through local development environments and a test framework. I enjoy technical leadership—mentoring teams and building developer tooling—so engineers can ship confidently and consistently.

Experience

Work history, roles, and key accomplishments

Current

Lead Software Engineer

Current

EPAM Systems

Sep 2021 - Present (4 years 10 months)

Project: Transfer Processing System for a major US online bank

• Designed and implemented two critical high-throughput fintech services from scratch, including architecture, data model, integrations, observability, and production deployment.
• Designed a reusable data-access library for FIS database integrations, reducing boilerplate code and standardizing access patterns across services.
• Reduc

Lead Software Engineer

actiTIME

Aug 2017 - Sep 2021 (4 years 1 month)

Projects: actiTIME & actiPLANS — time tracking and work scheduling platform

• Grew from Software Engineer to Lead Software Engineer.
• Migrated an existing monolith to a microservices-based architecture in Docker.
• Converted a complex Jersey-based service into a Spring application, reducing the codebase by 20%.
• Reduced deployment manual effort by 60% by improving the CI/CD pipeline using TeamC

Java Developer

Simple Solution

Sep 2015 - Jun 2017 (1 year 9 months)

Project: Mobile operator commission settlement system

• Designed and implemented a report generation framework using JasperReports.
• Increased test coverage from 60% to 85% by integrating SonarQube quality gates into the CI/CD pipeline.
• Reduced manual effort by 80% and delivery time by 60% by introducing a CI/CD pipeline using TeamCity.
• Improved issue analysis by adding monitoring with Graph