Viktoria – Ruby on Rails, Ruby, Golang

It is an online platform offering coaching courses and personal and professional development services. It's designed for individuals aiming to achieve their goals. Key features include access to online courses, individual coaching sessions, and a coach training program.

• Fixed bugs and performed troubleshooting;
• Designed and implemented new features;
• Integrated new technologies for application features (integration with Calendly API, Stripe);
• Improved business logic;
• Organized planning, development, and implementation of features and fixes on a project;
• Added CI/CD for automation deployment;
• Developed and updated documentation for code

The platform links dental practices with certified dental hygienists, dental assistants, and front office professionals, offering both temporary and permanent staffing solutions.

• Created database design for new features;
• Implemented and enhanced business solutions;
• Implemented logic for payments and subscriptions;
• Participated in code review;
• Eliminated flaky tests in CI/CD, enhanced delivery process;
• Maintained test coverage with unit and integration tests.

Two Shopify platforms.

The first application automates the printing and delivery of branded invoices, packing slips, and receipts, offers customizable templates, and supports multi-currency sales, reducing support needs and improving branding for businesses of all sizes.

The second application provides a solution to effortlessly customize invoices, packing slips, returns forms, and gift receipts, elevating business branding

• Added multi-lingual support to 2 Shopify apps (made the app UI adapt to the user's preferred language);
• Integrated the Shopify apps with an external application;
• Implemented automatic generation of PDFs for receipts and invoices;
• Established test coverage with unit and integration tests.

This is one of the world's fastest-growing hospitality brands, blending beautifully-designed accommodations with coworking, recreation, wellness, and local experiences. Custom-built for today's nomadic traveler, this platform provides guests with a global infrastructure to seamlessly travel and work abroad.

• Created back-end architecture;
• Designed and implemented new features (front-end and back-end sides);
• Implemented full-text search;
• Designed and implemented integration with 3rd party services;
• Provided technical leadership for more junior members of the team (created lectures and presentations for teaching new technologies);
• Performed code review;
• Optimized slow-working requests;
• Provided and created test coverage in the project (around 50% from scratch);
• Started moving from monolith to microservices.

Travel web platform with Amadeus, Twilio, Algolia integrations, B2B wallet, stripe subscriptions

• Maintained existing Ruby code;
• Worked with Amadeus GDS;
• Contributed to Amadeus-enterprise gem (company-own gem);
• Mentored and set up knowledge sharing;
• Executed test coverage and documentation coverage;
• Built architecture for the application;
• Provided business solutions;
• Optimized DB requests;
• Set up CI/CD (Gitlab CI/CD);
• Implemented Stripe subscription;
• Provided a high level of security in the application and eliminate OWASP security risks.

A real-time user entertainment platform for one of the USA campuses. Provides students with the opportunity to engage with other students in the real world in brief, fun, curated challenges in a safe environment through a mobile device.

• Maintained existing Ruby code;
• Engaged in business logic solutions;
• Designed and implemented features for a reward system, referral system, virtual currency, and real-time events;
• Established test coverage with unit and integration tests;
• Set up push notifications (mobile and web);
• Upgraded Ruby version from 2.4 to 2.6.5.

Healthcare mobile and web app for weight loss. Including chat for users and coaches, push notifications, purchases, generating users' shopping lists and meal plans, statistics.

• Was responsible for Ruby coding and testing;
• Set up deploy and planned process;
• Engineered requirements.

The website presents the product to the target audiences: healthcare specialists, pharmacies, doctors, clinics, health insurers, nursing homes, patients, and investors.

• Designed back-end application architecture from scratch;
• Provided front-end and back-end interaction;
• Created the layout, styles, and interactive elements for the landing page;
• Integrated and customized Spina CMS for content filling;
• Established unit and integration test coverage.