Halyna Urbanska

Senior Backend Engineer with 10+ years of experience building scalable, production-grade systems on Node.js / NestJS / TypeScript, now focused on shipping LLM-powered features in real products. Hands-on experience with AWS Bedrock, Vercel AI SDK, and OpenAI integrations — designing prompt pipelines, agentic workflows, and document-processing automation that replaces manual analyst work at scale. Deep expertise in microservice architecture on AWS (Lambda, SQS, S3, EventBridge, RDS), event-driven systems with Kafka and RabbitMQ, and high-performance database design.

Proven record of delivering up to 1500% performance gains on critical paths. Comfortable leading sub-teams, conducting technical interviews, mentoring engineers, and owning architecture decisions end-to-end. Practitioner of TDD and clean architecture.

Senior Software Engineer at Exadel (2025-07 – Present)

Project: CRM platform for investment research with LLM-driven data enrichment Team size: up to 17 members Tech stack: TypeScript, Node.js, NestJS, AWS Bedrock, AWS Lambda, SQS, S3, DocumentDB (Mongoose), Cognito, Redis, Swagger, Docker, microservices, TDD

• Designed and shipped LLM-powered email parsing pipeline on AWS Bedrock — automating extraction of structured investment data from unstructured emails, eliminating hours of manual processing per analyst per day.
• Built streaming CSV ingestion with on-the-fly validation and transformation, enabling reliable processing of large research datasets without memory pressure.
• Architected integrations with external CRM systems via event-driven patterns (SQS), improving data freshness and decoupling failure domains.
• Led refactoring initiatives that improved code architecture, runtime performance, and security posture across core services.
• Practiced TDD with comprehensive unit test coverage on all new features.

Node.js Developer / Tech Lead at Fulcrum (2022-03 – 2025-06)

Projects: AI-powered medical-device search platform (mobile), digital PDF signing platform, interactive layer for live game streaming, healthcare mobile app, Google Ads marketing platform Team size: up to 10 members Tech stack: TypeScript, Node.js, NestJS, Vercel AI SDK, OpenAI, PostgreSQL, TypeORM, AWS (Lambda, SQS, S3, EventBridge, RDS), GCP, OpenSearch / ElasticSearch, Redis, RabbitMQ, WebSockets, Docker, Firebase, Auth0, Stripe, Veriff (KYC), Twitch API, npm workspaces, microservices, n8n

• Integrated LLM pipelines for process automation using Vercel AI SDK (LangChain-style orchestration) — building agentic workflows that powered the AI search experience for medical-device data.
• Delivered performance improvements of up to 1500% on critical paths through query optimization, caching strategies, and architectural rework.
• Led a sub-team delivering core platform features end-to-end, including code reviews, technical interviews, and mentoring.
• Designed infrastructure, database, and code architecture for multiple greenfield startup MVPs, ensuring they could scale beyond the initial product-market fit phase.
• Implemented third-party integrations across payments (Stripe subscriptions, Gigadat), KYC (Veriff), streaming (Twitch API), and identity (Auth0, Firebase).
• Authored technical documentation and drove TDD adoption across the team.

Full Stack Developer at Rozetka (2021-08 – 2022-03)

Project: Logistics system for one of the largest e-commerce marketplaces in Eastern Europe Team size: up to 7 members Tech stack: TypeScript, Node.js, NestJS, React, MaterialUI, PostgreSQL, ClickHouse, TypeORM, Kafka, RabbitMQ, Redis, GraphQL, WebSockets, Kubernetes, Docker, NX monorepo, Kibana, microservices

• Developed and shipped multiple production microservices serving high-throughput marketplace traffic.
• Built a full-stack cash-desk system (frontend + backend) used in physical fulfillment centers.
• Implemented frontend features in React/MaterialUI integrated with the backend via GraphQL.

Full Stack Developer at SEOAir (2014-04 – 2021-08)

Domains: marketplaces, e-commerce, travel services, legal/visa consulting, real estate, marketing Team size: up to 4 members Tech stack: JavaScript, TypeScript, Node.js, Express.js, NestJS, PHP, WordPress, React, Angular, PostgreSQL, MySQL, MongoDB, HTML/CSS, Bootstrap

• Built web platforms and online services from scratch — frontend, backend, and infrastructure design.
• Designed system architecture for multi-tenant web services across diverse business domains.
• Delivered SEO and page-speed optimizations that improved Google Search visibility for client sites.

Bachelor of Computer Science in Computer Science – Ternopil 'Ivan Pul'uj' State Technical University (2000-09 – 2005-06)