Ivgeni Slabkovski
Senior Full-stack Developer
Barrie,ON
Summary
Senior Full-Stack Developer with over 12 years of experience in Ruby on Rails and more than 3 years specializing in modern React and TypeScript. Expertise includes building reliable, maintainable systems end-to-end, encompassing domain modeling, API design, performance tuning, CI/CD, and front-end UX. Proven ability to manage legacy modernization projects while ensuring data integrity and seamless integration across caches, search, analytics, and third-party services. Detail-oriented and organized, thriving in fast-paced environments to meet tight deadlines and contribute positively as a collaborative team player.
Overview
14
14
years of professional experience
3
3
Languages
Work History
Senior Ruby on Rails Engineer
Retention.com
06.2024 - 06.2025
- Led feature development and maintenance on a large-scale Rails and JavaScript applications, emphasizing code quality, test coverage, and safe, incremental delivery.
- Refactored legacy components into modular, testable units; improved reliability and developer ergonomics while reducing cycle time.
- Strengthened data integrity by treating Postgres as SSoT and rebuilding downstream artifacts (caches, exports) deterministically.
- Collaborated cross-functionally to shape requirements, plan releases, and maintain production stability.
- Achieved successful project outcomes by maintaining accurate documentation and meeting strict deadlines.
Senior Full-Stack Developer
HomeStars
11.2020 - 01.2024
- Maintained and evolved a hybrid Rails + React web application serving the public marketplace; delivered backend APIs and frontend interfaces.
- Introduced safer deployment practices, feature flags, and observability that reduced incidents and improved feedback loops.
- Optimized queries and background jobs (Microservices) to mitigate bottlenecks and improve request latency.
Senior Full-Stack Developer
Faris
01.2019 - 01.2020
- Modernized a Rails platform and set up a Docker-based development environment for reproducible builds and onboarding.
- Implemented AWS infrastructure patterns (S3/CloudFront/Route 53/SES) and CI workflows for stable delivery.
Senior Developer
Mintent (formerly gShift)
01.2017 - 01.2018
- Built and maintained Rails services and integrations for dashboard workflows; improved test coverage and performance; implemented new features.
- Implemented background processing, reporting pipelines, and admin tooling to reduce operational inefficiencies.
Full-Stack Developer
Conx2share
01.2015 - 01.2017
- Delivered user-facing features across Rails APIs and mobile-facing endpoints; managed AWS resources (EC2, S3, RDS, CloudFront).
- Hardened authentication/authorization and added monitoring to improve uptime and security posture.
Software Developer / Sys/DB Admin
Rhubarb
01.2011 - 01.2015
- Maintained a Spree Commerce cluster and custom Rails plugins; implemented CI and deployment automation.
- Performed MySQL/PostgreSQL administration (backups, replication, tuning) and production troubleshooting.
Education
Diploma - Computer Analyst/Programmer
Georgian College
Barrie, ON01.2007
Skills
- Languages: Ruby, TypeScript, JavaScript, SQL
- Frameworks: Ruby on Rails, React, RSpec, Jest/Vitest
- Front-End: CSS3, Responsive design, Bootstrap, Tailwind, HTML5
- Databases: PostgreSQL, MySQL; schema design, migrations, query optimization
- Cloud & DevOps: AWS (EC2, S3, CloudFront, Route 53, RDS, SES/SNS/SQS), CI/CD, Docker
- Architecture: REST/JSON APIs, background jobs, caching, search indexing, eventing/outbox, observability
- Practices: TDD/BDD, refactoring, code reviews, performance profiling, documentation, mentoring, effective time management, quality assurance
Accomplishments
- Legacy modernization: Consistently reduced tech debt via test-guided refactoring, introducing seams, and extracting services where appropriate.
- Performance wins: Cut response times with targeted indexing, N+1 remediation, and backgrounding heavy jobs.
- Data integrity: Enforced domain invariants at the database layer; implemented deterministic rebuilds for caches/search.
- Developer experience: Improved CI speed/stability and set standards for code review, documentation, and release hygiene.
Tooling Snapshot
- Ruby
- Rails
- RSpec
- Sidekiq/ActiveJob
- Postgres
- MySQL
- Redis
- ElasticSearch
- React
- TypeScript
- JavaScript
- HTML5
- CSS3
- Bootstrap
- Tailwind
- Webpack/Vite
- AWS (EC2, S3, CloudFront, Route 53, RDS, SES/SNS/SQS)
- Docker
- Git
- GitHub Actions/CI
Timeline
Senior Ruby on Rails Engineer
Retention.com
06.2024 - 06.2025
Senior Full-Stack Developer
HomeStars
11.2020 - 01.2024
Senior Full-Stack Developer
Faris
01.2019 - 01.2020
Senior Developer
Mintent (formerly gShift)
01.2017 - 01.2018
Full-Stack Developer
Conx2share
01.2015 - 01.2017
Software Developer / Sys/DB Admin
Rhubarb
01.2011 - 01.2015
Diploma - Computer Analyst/Programmer
Georgian College