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Senior Software Engineer with 6+ years of experience across the full spectrum of backend development — from low-level algorithm design and blockchain to high-level system architecture and team leadership. Core expertise in Java, Spring ecosystem, and cloud-native technologies (AWS, Kubernetes, Docker). Actively leveraging LLM-based tools and AI agents to accelerate development workflows and engineering productivity. Domain experience spans fintech, payments, automotive, and telecom. Comfortable owning end-to-end delivery: building distributed systems, establishing engineering processes, mentoring developers, and driving technical decisions.…Senior Software Engineer with 6+ years of experience across the full spectrum of backend development — from low-level algorithm design and blockchain to high-level system architecture and team leadership. Core expertise in Java, Spring ecosystem, and cloud-native technologies (AWS, Kubernetes, Docker). Actively leveraging LLM-based tools and AI agents to accelerate development workflows and engineering productivity. Domain experience spans fintech, payments, automotive, and telecom. Comfortable owning end-to-end delivery: building distributed systems, establishing engineering processes, mentoring developers, and driving technical decisions.

Mikita Yankouski

Back-End Developer, Web Developer, Blockchain Developer, +3

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Senior Software Engineer with 6+ years of experience across the full spectrum of backend development — from low-level algorithm design and blockchain to high-level system architecture and team leadership. Core expertise in Java, Spring ecosystem, and cloud-native technologies (AWS, Kubernetes, Docker). Actively leveraging LLM-based tools and AI agents to accelerate development workflows and engineering productivity. Domain experience spans fintech, payments, automotive, and telecom. Comfortable owning end-to-end delivery: building distributed systems, establishing engineering processes, mentoring developers, and driving technical decisions.…Senior Software Engineer with 6+ years of experience across the full spectrum of backend development — from low-level algorithm design and blockchain to high-level system architecture and team leadership. Core expertise in Java, Spring ecosystem, and cloud-native technologies (AWS, Kubernetes, Docker). Actively leveraging LLM-based tools and AI agents to accelerate development workflows and engineering productivity. Domain experience spans fintech, payments, automotive, and telecom. Comfortable owning end-to-end delivery: building distributed systems, establishing engineering processes, mentoring developers, and driving technical decisions.

Available to hire

Senior Software Engineer with 6+ years of experience across the full spectrum of backend development
— from low-level algorithm design and blockchain to high-level system architecture and team leadership.
Core expertise in Java, Spring ecosystem, and cloud-native technologies (AWS, Kubernetes, Docker).
Actively leveraging LLM-based tools and AI agents to accelerate development workflows and
engineering productivity. Domain experience spans fintech, payments, automotive, and telecom.
Comfortable owning end-to-end delivery: building distributed systems, establishing engineering
processes, mentoring developers, and driving technical decisions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Advanced

Polish

Advanced

Russian

Fluent

Work Experience

Senior Software Engineer at Google (Virtusa vendor)

August 1, 2025 - July 1, 2026

Built and maintained multi-region compliance modules to process and deliver regulated data in response to government legal requests across multiple jurisdictions. Owned requirements end to end—from analyzing legal and business documentation through implementation, testing, and production deployment. Worked across a large-scale Java codebase and internal frameworks, moving between multiple domains and service boundaries. Helped stand up a newly formed team's engineering workflow from scratch, including task breakdown, prioritization, and cross-team coordination. Drove alignment on architectural decisions and resolved technical disagreements within the team.

Senior Software Engineer at Visa

May 1, 2024 - January 1, 2025

Built and maintained a card-management engine to configure, distribute, and manage payment-card products for Visa's banking clients across Europe. Delivered features end to end across backend services, API layer, and Angular frontend, owning the full lifecycle to production. Drove a testing strategy with a strict 90%+ coverage bar using SonarQube to enforce continuous quality gating.

Lead Software Engineer at Finansy

June 1, 2023 - June 1, 2025

Grew from developer to Lead Engineer within two years, taking ownership of engineering processes, architecture, and delivery at a crypto-fintech startup. Researched blockchain network internals, providers, and data flows and turned complex concepts into clear documentation and actionable development tasks. Made core architectural decisions for microservices design, service decomposition, and inter-service communication. Bridged business, DevOps, and development by translating requirements into technical specs and coordinating cross-functional delivery. Introduced LLM-based tools and AI agents into team workflows to improve development velocity.

Software Engineer at Devopsi

December 1, 2022 - February 1, 2024

Built high-throughput reactive microservices (Kotlin coroutines, Spring WebFlux) for a payment platform handling large volumes of concurrent transactions and peak-load spikes while maintaining latency and stability. Designed logging microservices on the ELK stack for granular per-transaction tracing across distributed modules. Built an internal document-management tool for BMW's CRM (Quarkus backend, Angular frontend) to route documents between departments and assembly-line workflows.

Software Engineer at Cognizant

September 1, 2021 - November 1, 2022

Delivered backend and frontend features for a telecom platform in a SAFe Agile model. Worked across Java/Spring services and an Angular frontend as part of cross-team delivery aligned to SAFe processes.

Junior Engineer / Automation Tester at Inspeerity

April 1, 2019 - April 1, 2021

Built features for a finance app calculating transaction profits and costs for small companies using a Java/Spring backend and Angular frontend. Developed and automated test coverage (Selenium, TestNG) for a hospital patient-workflow document system in Germany.