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Petro Yankevych

@petroyankevych1

Senior backend engineer at 5Blue building Custodia AI’s MCP server and natural-language financial assistant.

At 5Blue, I developed REST APIs and PostgreSQL and MySQL data changes for Custodia AI. I also built an MCP server connecting Cursor, ChatGPT, and Claude securely to the platform, then built an in-app assistant for natural-language financial operations.

I built a receipt-recognition improvement loop that compares tester-submitted receipts with expected fields, proposes fixes through pull requests, and scores accuracy. I also delivered React and Next.js features and set up AI-assisted development workflows with Cursor.

At UKEES, I owned backend architecture for a US DNA analytics platform serving millions of active users and handling peak traffic of 250k+ requests per minute. I designed event-driven processing across Kafka, SQS/SNS, and RabbitMQ, and led engineering standards, delivery, and quality.

Previously, I developed backend services at Goodyear and led the Node.js backend team at TPD, where I coordinated delivery in a 30-engineer Scrum team. At Incora, I delivered full-stack product features across identity, publishing, government, and legal domains.

Experience

Work history, roles, and key accomplishments

Current

Fullstack Engineer

Current

5Blue

Mar 2026 - Present (8 months)

Developed REST APIs and data model changes on PostgreSQL and MySQL, including index and query tuning. Designed and built an MCP server for AI integration and an in-app AI assistant for financial operations.

NodeJS TypeScript LoopBack PostgreSQL MySQL React Next.js MCP Claude APIs OpenAI API Cursor Slack API

Tech Lead

UKEES

Jun 2023 - Mar 2026 (2 years 9 months)

Owned backend architecture end to end for a platform at 250k+ RPM peak, defining service boundaries, API contracts, and release strategy. Implemented event-driven processing with Kafka, SQS/SNS, and RabbitMQ, and managed PostgreSQL, MongoDB, and DynamoDB.

NestJS TypeScript React Next.js Kafka RabbitMQ SQS SNS Cognito Kong PostgreSQL MongoDB DynamoDB Redis S3 Docker Lambda AWS ECS Kubernetes Terraform Harness Prometheus Grafana OpenTelemetry ELK

Back-End Engineer

Goodyear

Mar 2021 - Jun 2023 (2 years 3 months)

Developed NestJS/TypeScript services on AWS within a 100+ microservice ecosystem serving 10M+ users. Optimized PostgreSQL/MySQL and MongoDB, added Redis caching, and designed REST APIs with validation and versioning.

NestJS TypeScript AWS Lambda Amazon SQS S3 RDS Cognito Cloudwatch PostgreSQL MySQL MongoDB Redis Docker AWS ECS Jest Jenkins Gitlab CI React Next.js

Node.js Developer, Team Lead

TPD

May 2019 - Mar 2021 (1 year 10 months)

Led the Node.js/Express.js/TypeScript backend for a US security platform, building REST APIs for web, mobile, desktop, and embedded clients. Mentored engineers and coordinated backend delivery in Agile/Scrum.

NodeJS ExpressJS TypeScript MySQL Sequelize Redis Elasticsearch MQTT EC2 S3 RDS Mocha React

Node.js Developer

Incora

Jan 2017 - May 2019 (2 years 4 months)

Delivered full-stack features including Express.js backends with PostgreSQL, MongoDB, GraphQL, Redis, and third-party REST integrations, plus React frontends. Owned features end to end from schema design to testing.