Oleksandr Tarasiuk
Full Stack Engineer · Backend-focused
Kyiv, Ukraine · Available for relocation · EU Blue Card eligible (Summer 2026)
Full Stack Engineer with 2.5+ years building production Node.js/NestJS systems in fintech and automotive domains. Backend-focused: microservice architecture, event-driven pipelines (Kafka, RabbitMQ), and multi-database environments under real load.
01 — About
About Me
I'm a full stack engineer based in Kyiv, Ukraine, with ~2.5 years of commercial experience building production-grade distributed systems in Node.js and NestJS.
My focus is on FinTech and banking infrastructure — domains where reliability, consistency, and performance aren't optional. I've worked directly with production databases across PostgreSQL, Oracle, and MsSQL, integrated Kafka and RabbitMQ for event-driven workflows, and led a monolith-to-microservices migration for a live banking cashback platform.
I'm currently looking for full stack or backend engineering roles in Germany — ideally in FinTech, payments, or distributed infrastructure.
02 — Experience
Work Experience
42flows.tech
Full-stack Developer- Led migration from monolithic to microservices architecture for a banking Cashback module, improving scalability and maintainability
- Integrated Kafka, RabbitMQ, and Bull message brokers for reliable inter-service communication, processing 300+ transactions per second
- Implemented authentication and authorization using Keycloak and LDAP, supporting multi-tenant banking clients
- Wrote complex SQL transactions and optimized queries across PostgreSQL, Oracle, and MsSQL databases in production
- Managed deployments via Dokploy on AWS, configured CI/CD pipelines, and monitored logs through Kibana
CGS Team
Full-stack Developer- Implemented advanced Elasticsearch search with relevance tuning and filtering, improving result accuracy by ~20%
- Built a full-featured Stripe subscription system with webhook-driven billing and notifications
- Extended a tree-based project management system with nested folders, node copying, and cascading RBAC for an interior design platform
- Implemented user authentication and access control using AWS Cognito
- Optimized Redis caching strategy, reducing database load by ~40% and improving response times
03 — Education
Education
Taras Shevchenko National University of Kyiv
Bachelor (incomplete) · Computer Science — System AnalysisCompleted 120 ECTS. Studies were interrupted due to the full-scale Russian invasion of Ukraine in February 2022, which significantly disrupted academic continuity. Did not complete the remaining requirements for the degree.
04 — Projects
Projects
Cashback Platform
↗Microservice-based cashback platform for banks and fintechs. Processes 300+ card transactions per second, evaluating by MCC and terminal ID across multiple currencies.
Led backend architecture — microservices migration, message broker integration, multi-tenant auth, production DB work.
Design with Bubbles
↗3D interior design platform that converts floor plans into real-time 3D scenes. Available on iOS, Android, Windows, and Mac with collaborative project management.
Backend API — Stripe billing, AWS Cognito auth, Elasticsearch search, hierarchical project management with cascading permissions.
Autoplovykla
↗Car wash booking platform for Lithuania. Users find nearby car washes, book appointments, and earn loyalty points. Partners get a management dashboard.
Booking and scheduling logic with timezone handling, Twilio SMS, Firebase push notifications, Redis caching.
Taskey
↗Mobile task management platform for coaches, therapists, and educators to assign personalized tasks and content to clients.
Core API with NestJS and PostgreSQL, Elasticsearch search, Redis caching optimization.
05 — Skills
Technical Skills
06 — Languages
Languages
07 — Contact
Get In Touch
I'm open to full stack and backend engineering roles in Germany. Feel free to reach out.
tarolv3@gmail.com Download CV