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Kostiantyn Nosach

@kostiantynnosach

Senior Software Engineer at blip.pt building Kafka-powered subscription services for sports betting on the OBS platform.

Portugal

Message

At blip.pt (Flutter Entertainment), I develop backend microservices for the OBS platform within the NOMAD project, enabling dynamic subscription management for sports betting products. I implemented event-driven pipelines with Apache Pekko Streams and Kafka to process subscription state in real time.

At First Ukrainian International Bank (FUIB), I developed targeted banking advertising services, including a banner placement feature and microservices for high-volume, real-time banner serving. I also implemented Kafka and RabbitMQ pipelines for campaign analytics.

Across telecom, banking, and enterprise projects, I’ve worked on systems including an Order Management System at Luxoft and a multiprotocol load balancer at Mobius Software LTD. My work has included reducing order processing time by 10% and improving network throughput by 30%.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

blip.pt (Flutter Entertainment)

Jan 2026 - Present (9 months)

Developing backend microservices for the OBS platform within the NOMAD project, enabling dynamic subscription management for sports betting products. Implemented event-driven data pipelines and applied hexagonal architecture principles.

Java 25 Spring Boot Pekko Streams Kafka PostgreSQL Cucumber Docker Agentic AI LLM Integrations

Senior Software Developer

First Ukrainian International Bank (FUIB)

May 2024 - Dec 2025 (1 year 7 months)

Developed and integrated targeted banking advertising services to enhance customer acquisition through dynamic banners and embedded components. Built scalable microservices architecture and data processing pipelines for campaign analytics.

Java 17 Python Spring Boot MyBatis Microsoft SQL Server MongoDB Kafka RabbitMQ Redis Kubernetes Kibana Grafana Airflow Mockito Cucumber Agentic AI

Senior Software Developer

Luxoft

Jan 2023 - Apr 2024 (1 year 3 months)

Contributed to an Order Management System enabling traders to enter, modify, and cancel orders with real-time market data. Implemented a critical feature that reduced order processing time by 10% and increased automated test coverage by 10%.

Java 17 Spring Framework Chronicle Cucumber Microservices Sybase BASH Docker

Senior Software Engineer

Luxoft

Jan 2022 - Dec 2022 (11 months)

Designed and implemented a Kafka-based event management platform on AWS, reducing event propagation latency by 25%. Built a real-time online voting microservice and integrated third-party speaker content upload workflows.

Kotlin Kafka MySQL Redis Kubernetes EC2 S3 Kibana

Senior Software Developer

Bluefield Technologies

Nov 2020 - Dec 2021 (1 year 1 month)

Replaced Netty with Aeron as the transport layer in OpenDaylight (SDN), improving network throughput by 30% and reducing latency by 20%. Enhanced SDN controller communication efficiency through optimised message serialisation.

Java 11 Akka Aeron Karaf Robot Framework Gerrit

Software Engineer

Evolve-IT Consulting

Aug 2019 - Oct 2020 (1 year 2 months)

Optimised PostgreSQL queries and Hibernate mappings, reducing database response time by 30% in a network device management system. Developed and integrated automation features for meeting scheduling and monitoring.

Java 14 PostgreSQL Hibernate Spring Framework Apache Tomcat Git

Java Developer

Mobius Software LTD

Dec 2015 - Jul 2019 (3 years 7 months)

Built and optimised a high-performance stateless multiprotocol load balancer (SIP, HTTP, SMPP, SS7, MGCP) serving telecom networks. Enhanced system scalability via Netty-based request handling optimisations and automated deployment.