Open to opportunities

Olga Barkhatova

@olgabarkhatova

Message

Senior Golang developer building event-driven payment and marketplace backends at scale.

Zimbabwe

Message

What I'm looking for

I’m looking to lead backend architecture for high-throughput payment and commerce platforms, focusing on reliability, event-driven processing, and measurable performance improvements—where technical leadership and clean system design matter.

I’m a Senior Golang Developer with 10+ years of experience shipping backend systems across e-commerce, payments, fintech infrastructure, and cybersecurity products.

I design and deliver event-driven Go and Python backends for payment platforms and high-load marketplaces, including Kafka-based transaction processing and provider integrations for services serving tens of millions of users.

At Wildberries, I owned and evolved a Go-based B2B sales and payment backend, rebuilt payment intake to improve safety and traceability, and introduced idempotent refund handling to eliminate duplicates and protect financial consistency.

I also lead with pragmatic architecture—migrating legacy systems toward microservices, strengthening reliability, and improving performance through instrumentation, distributed tracing (OpenTelemetry/Jaeger), and targeted SQL and system optimization—backed by tech leadership and repeatable engineering practices.

Experience

Work history, roles, and key accomplishments

Current

Senior Go Developer

Current

Wildberries

Sep 2022 - Present (3 years 10 months)

Owned and evolved an event-driven B2B sales and payment backend for 30M+ users using Go, Gin, Kafka, PostgreSQL, and gRPC. Rebuilt payment intake, improved idempotent refund handling, and designed QR-based checkout with event-driven settlement to reduce payment time for many orders.

Go Gin Apache Kafka PostgreSQL gRPC Event Driven Architecture Idempotent Processing Database Backed Event Logging Contract Based Adapters QR Checkout SQL Optimization

Senior Backend Developer

Selecty

Aug 2019 - Sep 2022 (3 years 1 month)

Delivered backend systems across multiple enterprise client projects using Go, Python, Kubernetes, Kafka, and Temporal, and served as tech lead for system architecture and QA processes. Built a Python/FastAPI/Celery platform for residential building maintenance and integrated VMware vSphere APIs and IPAM to improve infrastructure reliability.

Go Python Kubernetes Kafka Temporal fastAPI Celery IPAM System Architecture QA Processes

Senior Backend Developer

Megamarket

May 2017 - Aug 2019 (2 years 3 months)

Built high-load SKU matching and pricing intelligence processing up to 60M products per run using Go, Python, FastAPI, PostgreSQL, and ClickHouse. Re-architected a MS SQL monolith into microservices with Kafka and improved observability with OpenTelemetry, Jaeger, Prometheus, and Grafana.

Go Python fastAPI PostgreSQL Clickhouse MS SQL Server Kafka OpenTelemetry Jaeger Prometheus Grafana Microservices

Python Backend Engineer

Positive Technologies

Sep 2015 - May 2017 (1 year 8 months)

Developed backend services and engineering infrastructure for high-throughput network traffic analysis using Python, Django, PostgreSQL, Elasticsearch, and Ansible. Built detection and testing automation components including Django/DRF APIs, a Python load testing framework, and CI-integrated test suites with Playwright, TeamCity, and Allure.