tia337
Senior Software Engineer | Team/Tech Lead
8 years of commercial experience in designing and developing web applications and consulting. Proven track record delivering high-quality web applications across diverse industries β real estate, fintech, web3, affiliate-marketing, gambling. Strong technical leadership: built and led cross-functional teams (developers, QA, designers) to deliver results on time and at scale. Business-oriented mindset: partnered closely with stakeholders to solve real problems, optimize costs, and drive revenue growth through smart technical solutions.
Experience: 8 years
Yearly salary: $120,000
Hourly rate: $65
Nationality: πΊπ¦ Ukraine
Residency: π¬π§ United Kingdom
Experience
Tech Lead / Senior Front-end Developer
NDA 2024 - 2026
Built and maintained core services for secure, low-latency user routing, achieving 95%+ uptime. Took full ownership of frontend admin panels and the user pathfinder script, consistently delivering high-impact features that accelerated product growth. Conducted PR reviews and provided mentoring, improving code quality and accelerating onboarding for new team members. Delivered 90%+ of milestone tasks on time with zero QA defects. Maintained 95% test coverage (unit and integration), ensured regular dependency updates, and kept the system free of security vulnerabilities. Designed a clean, scalable architecture that enabled rapid delivery of new features. Transitioned into a technical leadership role, owning critical systems and guiding teams. Delegated tasks and managed backlogs with ~90% planning accuracy. Maintained strong cross-functional communication while mentoring colleagues on milestone planning, code reviews, and team processes. Translated complex business requirements into clear technical specifications and maintained comprehensive Confluence documentation for fast onboarding and ongoing project support. Integrated backend services via gRPC with automated code generation. Contributed to the corporate UI library while implementing UX improvements such as search highlighting, autocomplete, and simplified navigation. Applied Material Design best practices across projects to improve consistency and usability. Achieved 85% automated test coverage across the application, improving code reliability and release confidence. Reduced test pipeline execution time by 10Γ by leveraging Nx task caching and migrating the test suite from Jest to Vitest.
Senior Full-Stack Developer
Hank AI 2023 - 2024
Rebuilt a legacy filtering mechanism that suffered from poor performance and weak UX. Improved usability and reduced filter response times by ~60%, making it significantly easier for users to navigate and work with complex datasets. Integrated an auto-coding feature on the frontend that displayed AI-calculated results directly in the UI. This reduced coding time by ~30% and helped coders catch errors earlier. Introduced real-time notifications paired with a structured logging system, keeping users informed about backend events such as permission updates and system-wide announcements. Implemented full Role-Based Access Control (RBAC) across the stack. Added permission toggling and enabled admins to change roles in real time. Crucially, implemented SSE-based auto-logout to immediately enforce access revocations. Designed and built a custom admin logging system from scratch β from the database layer to the UI β allowing administrators to view user activity, changes, and events in a single place. This closed a critical observability gap. Delivered multiple production hotfixes under tight timelines, ensuring user retention and system stability during the post-release period.
Lead Front-end Developer / Senior Full-stack Developer
Door3 2022 - 2023
Built strategic applications aligned with organizational goals while addressing the needs of all stakeholders β from internal teams to end users. Developed and optimized complex, dynamic forms for collecting critical organizational data. Implemented conditional logic, advanced validation, and dynamic field rendering, helping teams streamline workflows and reduce data entry errors by nearly 30%. Delivered data visualizations (charts and dashboards) to surface performance trends and stakeholder metrics. These insights enabled decision-makers to identify patterns earlier and take timely action, improving strategic planning cycles. Integrated multiple third-party APIs, including U.S. government services, ensuring reliable interoperability and expanding application functionality without compromising stability. Improved application performance by reducing bundle size, optimizing change detection, and implementing lazy loading where applicable. Achieved noticeable speed improvements, reducing key load times by up to 35% on data-heavy views. Conducted regular code reviews and introduced best practices for scalable, maintainable front-end development. Advocated for consistent component architecture and effective state management, significantly improving team productivity and overall codebase health.
Senior Front-end Developer
Accenture middle east 2021 - 2022
Designed and delivered new product features end-to-end, from early concept and technical design through implementation and production release. Built intuitive, responsive user interfaces using a custom in-house UI kit, ensuring visual consistency, accessibility, and a high-quality user experience across the application. Designed and maintained facade layers to encapsulate complex data access and API interactions, significantly improving maintainability, reducing cognitive load for the team, and accelerating onboarding and development velocity. Led day-to-day engineering execution by reviewing code, mentoring engineers, and coordinating closely with product and design partners, resulting in faster delivery cycles and stronger cross-functional collaboration.
Middle Full-Stack Developer
Mailcheck.co 2019 - 2020
Refactored core application architecture to improve scalability and maintainability. Optimized performance for processing large CSV files, significantly reducing load and parse times by 15% β ensuring smoother UX for data-heavy workflows. Implemented business-critical features, including seamless payment functionality by integrating with Stripe. Led the technical integration with AppSumo, including support for promo codes and onboarding campaigns. Developed infrastructure for managing codes and tracking retention while aligning with platform requirements.Refactored core application architecture to improve scalability and maintainability. Optimized performance for processing large CSV files, significantly reducing load and parse times by 15% β ensuring smoother UX for data-heavy workflows. Implemented business-critical features, including seamless payment functionality by integrating with Stripe. Led the technical integration with AppSumo, including support for promo codes and onboarding campaigns. Developed infrastructure for managing codes and tracking retention while aligning with platform requirements.
Skills
affiliate
angular
firebase
gambling
graphql
javascript
nestjs
react
tech-lead
typescript
front-end
english
russian
ukrainian