Open to opportunities

Vitalii Vinnychenko

@vitaliivinnychenko

Message

I build resilient Python platforms, from regulated fintech APIs to cloud-scale distributed systems.

Ukraine

Message

What I'm looking for

I'm looking to own architecture and end-to-end delivery for resilient distributed systems, while mentoring engineers and improving reliability, security, and cloud efficiency.

At Peach Finance, I own end-to-end delivery of financial modules including fees, card management, and credit lines, from database schema through APIs. I also build compliance systems for SCRA, Metro2 reporting, and bankruptcy handling.

I've strengthened multi-tenant platforms with RBAC, data isolation, adaptive retries, idempotent endpoints, and backward-compatible API versioning. My work spans Python and Go services, gRPC, PostgreSQL, Redis, Kubernetes, and GCP.

Previously, at Neurocast, I co-designed the v2 architecture and led a monolith-to-serverless migration, cutting monthly AWS spend by roughly 40%. At Regrow, I built core services for irrigation, remote sensing, and field management, migrated 10 million geometry records with zero downtime, and created granular access controls for more than 10 user roles.

Across SoftServe, Temy, and early-stage startups, I've shipped high-volume APIs, cloud infrastructure, deployment tooling, ETL pipelines, and full-stack products. I enjoy owning architecture decisions, mentoring engineers, and improving reliability and code quality in distributed Python systems.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Peach Finance

Nov 2025 - Present (10 months)

Designed and shipped complex financial modules, built regulatory compliance systems, and implemented role-based access control and multi-tenant data isolation. Improved platform resiliency and managed API versioning and release pipeline tooling. Authored E2E test suites and developer documentation.

Python Go Flask GCP REST APIs gRPC PostgreSQL Redis GitHub Actions Kubernetes OpenAPI Datadog LaunchDarkly

Senior Software Engineer

Wiv

Nov 2024 - Nov 2025 (1 year)

Enforced project-wide code conventions via CI linting, integrated third-party services and cloud provider APIs, and introduced CI/CD pipelines. Overhauled on-call process with runbooks and escalation tiers. Collaborated directly with CTO and owned end-to-end feature design.

Python Flask AWS Lambda S3 API Gateway DynamoDB Step Functions Bedrock GitHub Actions LLM

Lead Full-stack Engineer

Neurocast

Aug 2024 - Nov 2025 (1 year 3 months)

Co-designed v2 architecture and led monolith to serverless migration. Audited cloud infrastructure, cutting AWS spend by ~40%. Hardened dev environment, mentored junior engineers, and codified infrastructure with Terraform. Introduced end-to-end APM with Elastic APM and OpenTelemetry.

Python Go React AWS EC2 Lambda API Gateway RDS AWS ECS Elasticache Cloudwatch Terraform GitHub Actions

Senior Software Engineer

Regrow

Jan 2022 - Jul 2024 (2 years 6 months)

Core backend engineer on MRV platform's primary microservice, built RBAC from scratch, and wrote custom geospatial data validation framework. Migrated 10M field geometry records with zero data loss and downtime. Acted as Engineering Manager during transition and handled on-call across GCP.

Python 3 fastAPI AsyncIO SQLAlchemy MySQL PostgreSQL Redis Docker Kubernetes Nomad GCP Grafana ElasticStack

Senior Python Engineer

Temy

Jun 2021 - Dec 2021 (6 months)

Built entire REST API layer for lite product tier with 130+ endpoints and 70%+ test coverage. Integrated four third-party accounting systems and set Python standards for the team. Shipped Swagger docs for a zero-documentation API.

Python 3 Flask SQLAlchemy PostgreSQL AWS EC2 S3 Swagger

Python/Go Engineer

SoftServe

Jul 2018 - May 2021 (2 years 10 months)

Shipped Python SDK for cloud-provider connectors and built core API backend serving 2M+ requests/day. Delivered audit logging and OAuth/OIDC integration for Fortune 500 client. Built rollback and canary deployment system across 15 datacenters. Sole owner of GCP infrastructure and built ETL pipeline for IoT platform.

Python Go gRPC Docker Kubernetes AWS GCP Terraform Jenkins Grafana Prometheus Datadog MQTT Cisco IOx Nginx

Full-Stack Engineer

CleanCity

Feb 2017 - Jun 2018 (1 year 4 months)

Sole architect, designed product architecture, built GraphQL API and React.js frontend for waste management route optimization. Owned AWS infrastructure.

Python 3 Flask React Redux GraphQL PostgreSQL Redis AWS