Project: Data migration<ul><li>Specialized in infrastructure cost optimization for a Ruby on Rails monolith.</li><li>Led data migration from MongoDB to PostgreSQL, ensuring seamless transition, maintaining data integrity, and boosting app performance.</li><li>Bound all interactions with the database inside the command and query objects to make the migration easier.</li><li>Used feature flags and developed a metrics system for risk mitigation.</li><li>Enhanced performance, monitoring, and deprecated functionality removal.</li><li>Improved database efficiency, resulting in cost reduction and system performance enhancement.</li></ul>

Senior Back End Engineer

Project: Connect (Bendigo Bank app)<ul><li>Developed and implemented PayTo, Term deposit accounts, and notifications for the Bendigo Bank app.</li><li>Improved performance and maintainability of legacy code. </li><li>Assisted in the migration of the app to GCP to ensure optimal performance. </li><li>Conducted a proof of concept for GraphQL implementation and contributed recommendations for future implementation. </li></ul>Tech Stack: Ruby, Ruby on Rails, Sorbet, SQL, GCP, Typescript, and React.

Senior Software Engineer

Project: Transactions <ul><li>Initiated multiple self-service automation projects for non-technical colleagues to increase work efficiency and independence, reducing BAU time. </li><li>Responsible for the general maintenance and performance optimization of applications and systems. </li></ul>Tech Stack: Ruby, Ruby on Rails, Sinatra, SQL, AWS RDS, Lambda, RSpec, and Luigi.

Redbubble Ltd

Project: Jora<ul><li>Developed and implemented new features and improvements for Jora’s systems including API push notification API, DB performance optimization, and reducing Postgres dependency of AdServer.</li><li>Contributed to DevOps and SecOps monitoring.</li><li>Implemented rule-based scam detection tools, reducing BAU time for colleagues, and conducted a successful experiment with machine learning scam detection.</li></ul>Project: Jora Pipeline <ul><li>Identified root causes of outages and convinced peers and management to transition from legacy batch processing architecture to event streaming. </li><li>Created a proof of concept and ran analyses, then led the transition using AWS technologies such as EventBridge, Lambda, and DynamoDB.</li></ul>Tech Stack: Ruby, Ruby on Rails, TypeScript, SQL, AWS, Python, GoLang, Clojure, Nginx, RSpec, Luigi, Ansible, CloudFormation, Redshift, Dynamo DB. Lambda, and Eventbridge.

Projects: Sony Xperia Configurator Cloud <ul><li>Designed and developed a high-level management serverless application with a Single Page Application (SPA) front-end.</li></ul>Tech Stack: JavaScript, Serverless Framework, AWS Cognito, AWS RDS, AWS Lambda, AWS EC2, VueJS, Vuex, VueRouter, and Mocha

Projects: Casino Heroes, Betser, Wuxia, Casitabi <ul><li>Stabilized the Casino Heroes project that was already in production by hardening the codebase, making it more testable, maintainable, and extensible. </li><li>Prioritized maintaining and improving the performance of the high-load casino application</li><li>Developed a monitoring and report system using PostgreSQL and ELK stack. </li><li>Designed and implemented new gamification utilizing statistical analysis and primitive machine learning mechanisms. </li><li>Collaborated closely with the front-end team to design and implement API endpoints and WebSocket updates to meet their needs. </li><li>Implemented integrations with game providers, payments providers, BI, and affiliate systems. </li><li>Established a robust process for code reviews, TDD, CI, pair programming, and code and architectural conventions within the team. </li></ul>Tech Stack: Ruby, Ruby on Rails, PostgreSQL, JavaScript, Sidekiq, ELK, RSpec, Capybara, Git, Github, CircleCI, Chef, and Capistrano.

Senior System Engineer

1. 1003 Bot (3 months)<ul><li>Led a team of two developers to design, develop and integrate a Facebook Messenger bot for property purchase credit</li><li>Used Ruby, Ruby on Rails, PostgreSQL, Resque, and RSpec</li></ul>2. RPM for BMC Inc (2 years)<ul><li>Contributed to the BRPM application (a tool for coordinating business-critical applications’ release lifecycle) for streamlining application release processes with fewer errors and facilitated collaboration among the release management teams for all releases, including past, current, and planned departures</li><li>Used JRuby, Ruby on Rails, PostgreSQL, Torquebox, JavaScript, jQuery, RSpec, and Capybara</li></ul>3. Porticoclub Inc (1 year)<ul><li>Led a team of four developers to improve a luxury resort club&#x27;s web application</li><li>Enhanced architecture, code reviews, and development processes.</li><li>Worked closely with product owners to define requirements and build working prototype</li><li>Used Ruby, Ruby on Rails, CoffeeScript, PostgreSQL, and various cloud services</li></ul>4. Nissan Dealer360, Customer: Nissan North America (2 years)<ul><li>Led a team of nine developers in migrating a complex project to Rails 3</li><li>Developed multiple Rails engines for sales dealership management</li><li>Mentored trainees and improved stakeholder communication</li><li>Used Ruby, Ruby on Rails, MySQL, JavaScript, and more</li></ul>5. Order Management App for Large Food Distributor (6 months)<ul><li>Implemented features for order management and maintained communication with the customer</li><li>Delivered a web-based solution for sales management with various tools</li><li>Used Ruby, Ruby on Rails, MySQL, and TestUnit</li></ul>

Ruby on Rails Technical Lead

<ul><li>Added the video chat feature to a social networking platform for young people in Northern Europe. </li></ul>Tech Stack: PHP and Adobe Flex.

Project: Franchise management website <ul><li>Created several APIs for widgets and successfully integrated geolocation functionality using the Google Maps API. </li><li>Responsible for integrating the payment system, resulting in a comprehensive application that provided information about charging station franchises. The system enabled managers to receive payments, generate reports, and add charging stations to the global map and provided an API for embedding services on customer sites and mobile websites with geolocation and mapping capabilities. </li></ul>Techstack: PHP, JavaScript, and the Google Maps API.

Personal details

Tolik K.

Summary

Technical skills

Work Experience

Education

Certifications & Awards