Valeriy Selitskiy

General Info

  • Residence: Kraków, Poland, EU
  • Time Zone: CET
  • Work Preferences: Fully Remote, Employment Contract, B2B Contract
  • Languages: English, Belarusian, Russian

Contact Information

Valeriy Selitskiy

Summary

A highly experienced backend developer transitioning into the GenAI field, bringing a proven track record in delivering high-quality, scalable solutions in diverse industries. Seeking a leadership role where deep technical expertise in LLMs and diffusion models can drive innovation and impact.

Tech & Skills

Frameworks & Languages:

  • Go: Buf, Gin, Echo, Fiber (+ fasthttp), sqlc
  • Python: FastAPI, Pytorch, HF: Transformers, Diffusers
  • PHP: Laravel, Symfony, Doctrine
  • JS: Vanilla, React + TypeScript

Environments:

  • AWS, GCP, Kubernetes, Docker, LAMP/LEMP, bare metal

CI/CD:

  • GitHub Workflows, GitLab Pipelines, Jenkins, Bitbucket pipelines, ArgoCD

DBMS:

  • PostgreSQL, MySQL, SQLite, MS SQL Server, MongoDB, Clickhouse, Redis

Soft Skills:

  • Adaptability, collaborative mindset, effective communication, problem-solving, receptiveness to feedback, respect for diversity, social intelligence, and a safety-first approach.

Goals and interests

Looking for a position to lean from purely backend SWE career path into ML/AI related. I created a pet project that features:

Spotlight

Plotva: A free-to-use Telegram chatbot leveraging local LLM inference for privacy-first, realistic interactions, integrating cutting-edge diffusion models for image generation.

Key features:

Plotva uses advanced algorithms to determine the optimal frequency of interaction, maintaining a casual atmosphere in chats. The bot easily integrates into group conversations and is available for personal communication.

The project is developed as a non-commercial initiative, open to user suggestions for functionality improvements.

Experience

Independent Contributor (B2B Contract)

– Present

  • Development and maintenance of various applications using Go, Python, and PHP.
  • Seamless integration of new features across diverse platforms -- Agile methodologies, cross-functional collaboration.
  • 99.99% uptime achieved for mission-critical systems -- Best engineering practices, continuous monitoring.

Senior Golang Engineer @ Unity

  • 25% latency reduction in B2B client's system -- Microservices optimization, Go.
  • 30% reliability improvement -- Distributed systems design, error handling strategies.

Backend Software Engineer @ Lyft

AWS, Kubernetes, Microservices, PostgreSQL, DynamoDB, Go, Python, TypeScript

  • Lead the development of search-related services and operations tooling within the Mapping division.
  • Participated in the optimization of the data ingestion and ETL pipeline, which, when combined with other efforts, resulted in operational cost reductions exceeding $10 million.
  • Maintained and improved public points-of-interest geospatial search APIs.
  • Provided mentorship and coaching to team members transitioning to the Go programming language.
  • Contributed to the development of technical specifications, solution architecture, and design reviews.

Senior Software Engineer @ SoftSwiss

Kubernetes, NATS, ZeroMQ, RabbitMQ, PostgreSQL, Go

  • Design and built real-time low latency services for the sports betting industry.
  • Bare-metal Kubernetes setup and deployment.
  • Integration with many third-party supply and demand providers.

Senior Software Engineer @ VIV Dev

AWS, Docker/ECS, Go, Python, Node.js, JavaScript

  • Developed architecture for a mobile longevity coaching application
  • Built backend services, implemented testing protocols, and managed deployments
  • Established CI/CD pipelines and monitoring systems

Senior PHP Developer @ Rakuten Viber, Minsk

LEMP, PHP, MySQL, API

  • Developed and maintained private and public APIs for key projects including Viber Out, Sticker Market, and Viber Wallet.
  • Utilized LEMP stack with Symfony 2.8, MySQL 5.7, Memcached, GitLab, and Jenkins

Earlier Positions

  • Lead Web Developer at Alutech (September 2012 - October 2013)
  • Senior Web Developer, Team Lead at Admirals (August 2010 - September 2012)
  • JS/C# Developer at Stylesoft (December 2008 - May 2010)
  • PHP Developer at Seobility (May 2008 - December 2008)
  • Web Developer at Minsk City Executive Committee IT Center (July 2005 - May 2008)

See more examples of my experience on LinkedIn.