Arseniy Popov

Skills and tools

Key Achievements

• Collaborated closely with UX and product teams to design and improve lead forms across various channels, including Telegram mini-apps, landing pages, and promotional sites for several media outlets (details under NDA). This led to the introduction of 5 new micro-products/services, which resulted in a 4.5x increase in the client base over the course of a year.
• Implemented CI/CD practices with coverage and linking, created an internal NPM registry for cross-project modules using Lerna and Verdaccio, and documented and systematized the development processes. Some of the modules I developed were used in 90% of all studio projects, saving hundreds of developer hours.
• Primarily worked within cross-functional teams on client projects including panels/dashboards, Telegram apps, and mini-games.

Responsibilities

• Codebase Maintenance & Optimization: Refactored legacy systems, improved test coverage, and enhanced application performance.
• Quality Assurance: Elevated testing standards, reducing regression risks and improving CI/CD reliability.
• Cross-Functional Collaboration: Worked closely with Product, UX, and QA teams to align technical solutions with business goals.
• Technical Hiring: Conducted interviews and contributed to developer hiring decisions.

Key Achievements

• Optimized CI/CD Pipeline: Reduced deployment time from 10+ minutes to 1.5 minutes, cutting CircleCI costs by 50% + through workflow improvements and caching strategies.
• Codebase Refactoring & Bug Reduction: Streamlined legacy code, decreasing bug frequency by 33% (from 20–12 bugs per 50-53 tasks) and improving maintainability.
• UX & Conversion Optimization: Partnered with product and design teams to remove 3 redundant screens, simplifying the user journey and increasing conversion rate (CR) by 0.4%.

Skills and tools

Key Responsibilities

• Led product support and feature development, implementing enhancements based on user feedback and analytics.
• Redesigned and optimized search functionality for a database of 6M+ books and articles.

Key Achievements

• Built a new front-end application from scratch, improving usability and performance.
• Modernized the search infrastructure:
  • Replaced legacy systems (MongoDB + NGINX static files) with Elasticsearch for faster, scalable search.
  • Migrated storage to MinIO for efficient document management.
• Enhanced content discoverability through improved indexing and metadata organization.

Skills and tools

Key Responsibilities

• Maintained and improved existing codebase through systematic refactoring and performance optimizations.
• Developed new features with a focus on scalability and maintainability.
• Integrated RxJS to streamline state management and asynchronous operations.

Key Achievements

• Eliminated callback hell by designing and implementing a centralized RxJS store, simplifying state management and improving code readability.
• Collaborated with QA team to implement (E2E) testing, enhancing application reliability and reducing regression risks.

Skills and tools

Blockchain-Powered Mobile App (Dispute Resolution Platform)

Led end-to-end product development for a zero-commission dispute settlement app on blockchain, eliminating intermediaries.

Key Contributions:

• Researched market needs, designed UX/UI, and validated the concept through user interviews.
• Developed a minimum viable product (MVP) with blockchain integration for secure, transparent transactions.
• Built the mobile app from scratch (frontend + smart contracts), ensuring seamless dispute resolution workflows
• Implemented blockchain features (e.g., immutable records, automated settlements).
• Tested the MVP in controlled environments, iterating based on feedback.
• Pitched the product to stakeholders, securing interest for further development.