Open to opportunities

Roman Markevich

@romanmarkevich

Senior backend engineer specializing in event-driven .NET distributed systems, observability, and production reliability for e-commerce.

Vietnam

Message

What I'm looking for

I’m open to remote B2B contractor roles with European and US companies, where I can build event-driven .NET services, improve reliability and observability, and own delivery end to end—from design and CI/CD to production support.

I’m a senior backend engineer with 7+ years building production .NET services for e-commerce and distributed platforms. I focus on event-driven architecture, production reliability, observability, performance, and delivery automation.

I own changes end to end—from requirements and system design through CI/CD, release, and production support—partnering with product, QA, architecture, and platform teams. In one role, I cut incident MTTR from 90 to 30 minutes by leading an observability rollout across 12 critical services, including structured logs, distributed tracing, Grafana dashboards, and SLO-based alerts.

I also improve reliability and throughput by design: I reduced message-loss incidents from six to one per quarter and raised delivery SLO from 99.70% to 99.95% by implementing a MongoDB-to-Kafka Transactional Outbox. I’ve accelerated delivery by automating CI/CD (cutting deployment time from 8 hours to 20 minutes) and supported high-throughput Kubernetes migrations while aligning service boundaries through architecture reviews.

Experience

Work history, roles, and key accomplishments

Current

ASP.NET Core Developer

Current

Gold Apple

Mar 2025 - Present (1 year 4 months)

Led an observability rollout across 12 critical services to reduce incident MTTR from 90 to 30 minutes, using structured logs and distributed tracing. Built a MongoDB-to-Kafka transactional outbox to reduce message-loss incidents and improve delivery SLOs, and reduced Kafka consumer lag through batch consumption.

C#ASP.NET Core MongoDB Kafka Transactional Outboxes ELK Grafana Prometheus Jaeger gRPC Redis AWS Observability SLOs CI CD

ASP.NET Core Developer

Katusha IT

May 2024 - Mar 2025 (10 months)

Automated CI/CD with Bash and PowerShell to reduce deployment time from 8 hours to 20 minutes. Supported a Kubernetes migration while improving peak availability and designing the fault-tolerant migration approach with architecture diagrams and design reviews.

C#ASP.NET Core EF Core PostgreSQL Clickhouse RabbitMQ Kubernetes Azure BASH PowerShell CI CD Microservices Reliability

ASP.NET Core Developer

Ozon Tech

Jul 2021 - May 2024 (2 years 10 months)

Improved customer-facing read performance by extracting a bottleneck into a separately scalable service. Decomposed a monolith using the Strangler Pattern with progressive request migration, while reducing nondeterministic tests and increasing load-test generation throughput.