Ilia Kritiuk - Senior Full-Stack Java Engineer

Senior Full-Stack Java Engineer | Team Lead | Java 21+, Spring Boot, Kafka, Kubernetes, React/Next.js

About Me

Senior Full-Stack Java/Spring Engineer and Team Lead with 10+ years of experience building resilient, large-scale platforms in high-availability environments.

I specialize in Java 21+, Spring Boot, microservices, and event-driven architectures (Kafka/RabbitMQ), with cloud-native delivery using Docker and Kubernetes. I also work across the frontend stack with React/Next.js and TypeScript when end-to-end ownership is required.

I lead full product delivery from architecture to production, mentor engineers, and optimize engineering processes. Recent outcomes include improving code quality from 92% to 98% and reducing deployment time by 70%.

Key Skills

Backend & Architecture

Java 21+
Spring Boot
Microservices
Event-Driven Architecture
Apache Kafka
gRPC

Cloud & Delivery

Kubernetes
Docker
CI/CD (Jenkins)
TeamCity
AWS
RabbitMQ
Redis

Data & Frontend

PostgreSQL
MongoDB
React
Next.js
TypeScript
AEM

Leadership

Team Lead
Mentorship
Demos
Scrum Master

Experience

Aug 2025 — Present | Team Lead (AI Lab) | Self-Employed (Remote)

Designed and launched an AI-powered service from scratch for small businesses.
Integrated Ollama (local LLMs) and OpenAI/ChatGPT into business workflows.
Built backend services enabling AI assistants for automation and decision support.
Led architecture, technical strategy, and delivery as team lead.

Apr 2019 — Aug 2025 | Senior Full-Stack Java Developer / Team Lead | Diva-e Platforms GmbH

Led a team of 6 engineers delivering Spring Boot microservices in a high-availability environment.
Designed and implemented event-driven architectures with Kafka and RabbitMQ.
Improved code quality from 92% to 98% through engineering standards, reviews, and mentoring.
Reduced deployment time by 70% by optimizing CI/CD pipelines and release processes.
Owned end-to-end delivery: architecture, implementation, production rollout, and post-release optimization.

Apr 2017 — Apr 2019 | Full-Stack Java Developer | BizTech Enterprise Solutions

Built Spring Boot microservices with PostgreSQL for high-volume e-commerce workflows.
Designed REST and gRPC APIs for reliable internal and external integrations.
Implemented Kafka and RabbitMQ components for asynchronous order-processing pipelines.
Delivered React-based frontend components and presented technical solutions to business stakeholders.

Jun 2015 — Apr 2017 | Senior Java Developer | Sberbank Technology

Developed high-load credit scoring modules for large financial data volumes.
Migrated legacy components to Spring Boot microservices to improve scalability and release velocity.
Implemented automated business rule engines for loan-decision workflows.
Mentored engineers and contributed as Scrum Master for a regional team.

Sep 2014 — Jun 2015 | Implementation Specialist | Infostandard

Delivered software systems for public-sector organizations and university infrastructure projects.
Built a reusable access-control solution for university pool facilities.