Eugene Kunitsa

Software Engineer

Minsk, Belarus10 yrs 4 mos experience

Highly StableAI Enabled

Key Highlights

10 years of experience in full-stack development.
Expert in building SaaS products across multiple industries.
Strong mentor with a focus on code quality and team support.

Stackforce AI infers this person is a Full-stack Developer specializing in FinTech and SaaS solutions.

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Skills

Core Skills

Ruby On RailsReact

Other Skills

AJAXAWSAmazon EC2Amazon Relational Database Service (RDS)Amazon Web Services (AWS)BootstrapCoffeeScriptCordovaCucumberDeviseDockerElasticsearchGherkinGitGoogle Calendar and Place API

About

I’m a Senior Full-stack Ruby on Rails Developer with about 10 years of experience. I build and support SaaS products in FinTech, EdTech, B2B and regulated entertainment (including AML/KYC and compliance). Some things I’ve worked on: - Multi-brand SaaS platforms. - Improving performance and stability of legacy Rails applications. - Integrating third-party services like Stripe, TaxJar, SendGrid, Sumsub, OpenAI API, Google Calendar and Zoom. - Setting up automated tests, static analysis and CI/CD to keep delivery safe and predictable. - Mentoring developers and supporting teams with architecture and code reviews. Tech stack: Ruby, Ruby on Rails, React, TypeScript, PostgreSQL, Redis, Sidekiq, Elasticsearch, RSpec, Cucumber, Docker, AWS, CI/CD.

Experience

Timspark

Senior Ruby on Rails Developer

Jul 2025 – Present · 8 mos · Minsk, Belarus · Hybrid

Worked on a multi-brand whitelabel SaaS platform for regulated entertainment markets (compliance, AML/KYC, onboarding).
Developed and supported features for brand management, user flows and regulatory compliance.
Helped improve performance by profiling critical endpoints and optimizing database queries.
Participated in on-call support: investigated and fixed production issues to reduce impact on end users.
Collaborated with product and business stakeholders to clarify requirements and plan releases.
Contributed to code quality through code reviews and incremental refactoring of legacy parts.
Tech: Ruby, Ruby on Rails, PostgreSQL, Sidekiq, Redis, Turbo Frames, StimulusJS, React, TypeScript, RSpec, Cordova, Docker, Elasticsearch, Devise, AWS.

RubyRuby on RailsPostgreSQLSidekiqRedisTurbo Frames+9

Itransition group ltd.

Ruby on Rails developer

Nov 2015 – Jul 2025 · 9 yrs 8 mos · Belarus

Worked on several long-term SaaS products in FinTech, EdTech, B2B and auctions, mainly with Ruby on Rails on the backend and React on the frontend.
Designed and implemented features end to end: from requirements and API design to production deployment.
Improved performance and scalability of legacy Rails applications by profiling, refactoring and optimizing database queries.
Increased security by identifying vulnerabilities in legacy code and introducing safer patterns and tools.
Integrated third-party services such as Stripe, TaxJar, SendGrid, Sumsub, OpenAI API, Google Calendar and Zoom.
Migrated parts of the frontend from jQuery to React and introduced React Native for mobile clients.
Set up and maintained automated tests (RSpec, Cucumber, Gherkin), static analysis (RuboCop, Brakeman, Pronto) and CI/CD pipelines.
Mentored junior developers and supported the team with code reviews and technical discussions.
Tech: Ruby, Ruby on Rails, JRuby, React, React Native, JavaScript, TypeScript, PostgreSQL, MySQL, MongoDB, Redis, Elasticsearch, AWS (RDS, EC2), Docker, Git.