Roman Kormysh

RK

Open to opportunities

Roman Kormysh

@romankormysh

Senior software engineer powering cross-border payment integrations and high-load fintech infrastructure.

What I'm looking for

I’m looking for an engineering role in cross-border fintech where I can own payment integration and infrastructure end-to-end, build high-load distributed systems, and deliver with strong compliance, reliability, and fast, controlled releases.

I’m a Senior Software Engineer focused on cross-border payment integrations and high-load fintech systems. I delivered 6 cross-border payment integrations across regulated markets, aligning engineering decisions with business impact and regulatory constraints.

I own systems end-to-end—from compliance architecture and stakeholder specifications to production infrastructure. I build high-load distributed systems using Kafka, gRPC, and event-driven architecture, with a strong emphasis on reliability and controlled deployments.

Through AWS/Kubernetes modernization, I increased payment processing capacity 2x and reduced deployment time by 93%. I redesigned CI/CD pipelines (GitHub Actions, Helm), implemented an Istio service mesh for controlled rollouts, and used OPA to reduce deployment risk.

I also accelerated refactoring and improved test coverage using AI workflows. By building a full observability stack with Datadog, I reduced incident detection time and improved system reliability across production.

Experience

Work history, roles, and key accomplishments

JT

Current

Senior .NET Engineer

Current

Just Eat Takeaway

Nov 2025 - Present (7 months)

Owned end-to-end migration of a production .NET service from legacy Kubernetes (EC2) to Kubernetes (EKS), improving scalability and deployment reliability. Reduced deployment time from 30 to 2 minutes via CI/CD redesign (GitHub Actions, Helm) and implemented Istio service mesh with OPA to enable controlled rollouts and reduce release risk.

.NET C#AWS Kubernetes Helm Datadog Istio Entity Framework

GG

Senior .NET Engineer

Gaming Innovation Group

Apr 2024 - Nov 2025 (1 year 7 months)

Delivered 6 cross-border payment integrations across international markets, ensuring country-specific regulatory compliance. Served as primary technical contact for global payment gateway teams, owning integration architecture and release lifecycle while mentoring mid-level engineers.

.NET C#Payment Integration Compliance Architecture Kafka gRPC Event Driven Systems Stakeholder Management CI CD

SM

Full Stack Developer

Smartwebs

Nov 2021 - Apr 2024 (2 years 5 months)

Delivered fintech integrations that grew the company’s partner base by 30% by defining technical solutions with product owners and stakeholders. Led migration of legacy AngularJS modules to Angular 14 and built automated testing architecture to improve reliability and reduce regression risk.

.NET C#Angular Automated Testing SQL backend architecture CI CD

Education

Degrees, certifications, and relevant coursework

ZU

Zhytomyr State Technological University

2020 - 2025

Studied at Zhytomyr State Technological University (Sep 2020–Dec 2025).

SM

Smartwebs

Master’s degree, Software Engineering

2021 - 2024

Completed a Master’s degree program in Software Engineering (Nov 2021–Apr 2024). Worked on fintech integrations, migrated legacy frontend modules to Angular 14, and built automated testing to reduce regression risk.

Tech stack

Software and tools used professionally

GitHub

Kubernetes

GitHub Actions

Gmail

.NET

AngularJS

Kafka

Istio

Datadog

gRPC

SQL

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