Yahor Viarenicz
Driving AI and cloud backend innovation with Java and Python expertise.
Warsaw, PL
Full time
Remote
Results-driven Software Engineer skilled in Java (Spring Boot), Python backend development, and architecting scalable microservices. Recent projects include...
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My Career Journey
1/7
Avenga Sp. o.o.
Java/Python Developer
Jul 2024 - Present | 2y 1m
Warsaw, PL
Engineered an AI-driven assistant to automate and streamline workflows for research scientists. Architected core solution using LangChain and Azure OpenAI, integrated multiple databases for contextual...
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Avenga Sp. o.o.
Java Developer
May 2022 - Jul 2024 | 2y 2m
Warsaw, PL
Developed enterprise workflow applications using Spring Boot and Camunda, automated business processes with Oracle and MongoDB, managed asynchronous messaging with AWS SQS/SNS, centralized governance with...
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HSBC | GFT Sp. o.o.
Java Developer
Jul 2020 - Apr 2022 | 1y 9m
Designed and implemented data processing with Apache Spark and AWS, streamlined deployment with Jenkins CI/CD, processed large data using Pandas and Vaex, investigated production issues in Spring Boot...
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Lazard | GFT Sp. o.o.
Java/Python Developer
May 2020 - Jun 2020 | 1m
Prepared and transformed data for AI model pipelines, managed workflows with AWS SQS/SNS, maintained Airflow DAGs for ETL, processed data with Pandas and Solr, and implemented automated testing with Spock...
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Itransition Group Sp. o.o.
Java Developer
Sep 2019 - Apr 2020 | 7m
Developed a Spring Boot application with PostgreSQL for financial data processing, integrated dynamic business logic, handled real-time streams with Kafka, established CI/CD with Docker, and created comprehensive...
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Coffee Service Sp. o.o.
Java Developer/Electrical Engineer
Mar 2017 - Sep 2019 | 2y 6m
Created Spring Boot apps with PostgreSQL and Redis, managed machine-backend integration, implemented REST APIs and tests, designed electrical cabinets and diagrams, and commissioned vending machines.
Gorynski Kombinat
Engineer of Electrical Control & Instrumentation
Feb 2015 - Aug 2016 | 1y 6m
Supervised technical condition of machines, installed electrical networks, and performed ongoing repairs according to regulations.
Active Learning
Adaptability
Reliability
Influencing Skills
Coordinating
Decision Making
Results Focused
Analytical Thinking
Ethical Standards And Conduct
Most proud of (2/3)
1st
Built a RAG AI assistant with LangChain, Azure OpenAI, ChromaDB and Neo4j that delivered accurate answers used daily by research scientists.
2nd
Resolved a team split over AWS Fargate migration by proposing risk, rollback, and timeline plans, enabling a phased cutover with zero downtime.
Career Highlights
1/2
RAG pipeline with LangChain, Azure OpenAI, ChromaDB & Neo4j
Built trusted RAG assistant used daily by researchers
Poland,
While building an AI assistant for research scientists, I designed and shipped a retrieval‑augmented...
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Resolved team split through risk/rollback analysis and phased cutover
Negotiated phased AWS Fargate migration with zero downtime
Poland, 2026
When the team was split on migrating workloads to AWS Fargate, I synthesized risk, rollback and...
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My values
Quality
Accountability
Continuous Learning
Education
Minsk State Higher Aviation College
Service of Aircraft Computers and Electrical Appliances
2015
Certifications & Qualifications
360-hour intensive bootcamp in Java programming and software engineering
Software Development Academy2018
Language(s) I speak
English
Fluent
Polish
Fluent