# Petro Yankevych

Petro Yankevych is a remote worker on Himalayas, Fullstack Engineer at 5Blue, based in Poland.

Source: https://himalayas.app/@petroyankevych1

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

| Detail | Value |
| --- | --- |
| Availability | Looking for a job |
| Location | Poland |
| Authorized to work in | Poland |
| Salary expectations | 138k+ PLN |
| Job categories | Software Engineer, Technical Lead, Full Stack Engineer, Backend Engineer, NodeJS Developer |
| Skills | backend architecture, System Design, Microservices, high load systems, Event Driven Architecture, API Design, NodeJS, TypeScript, NestJS, ExpressJS, LoopBack, REST APIs, GraphQL, gRPC, WebSockets |
| LinkedIn | https://linkedin.com/in/petro-yankevych |

## About

```text
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

### Fullstack Engineer (current)

5Blue. Mar 2026 - Present

```text
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.
```

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

### Tech Lead

UKEES. Jun 2023 - Mar 2026

```text
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.
```

Skills: 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](https://himalayas.app/companies/goodyear). Mar 2021 - Jun 2023

```text
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.
```

Skills: 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

```text
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.
```

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

### Node.js Developer

Incora. Jan 2017 - May 2019

```text
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.
```

Skills: NodeJS, ExpressJS, PostgreSQL, MongoDB, GraphQL, Redis, React, Mocha, Chai

## Education

### Anthropic

Claude Certified Developer, Artificial Intelligence

```text
Earned the Claude Certified Developer certification from Anthropic in 2026.
```

### Lviv Polytechnic National University

Master of Science, Computer Science

```text
Completed a Master of Science in Computer Science at Lviv Polytechnic National University in 2017.
```

## Tech stack

- OpenAPI
- Amazon CloudWatch
- Amazon S3
- Kubernetes
- Jenkins
- GitHub Actions
- GitLab CI
- MySQL
- PostgreSQL
- MongoDB
- Node.js
- Next.js
- NestJS
- Redis
- Terraform
- Jest
- Mocha
- Chai
- React
- Webpack
- Amazon ElastiCache
- Kafka
- RabbitMQ
- MQTT
- Amazon SQS
- ExpressJS
- LoopBack
- Amazon SNS
- Grafana
- Prometheus
- OpenTelemetry
- Sequelize
- GraphQL
- gRPC
- Elasticsearch
- AWS Lambda
- Amazon RDS
- TypeScript
- Docker
- Jaeger
- OpenAI API
- Cursor
- Harness
- AWS
- REST APIs
- Claude API
- HTML
- CSS

To contact Petro, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire).

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