Nevyana Angelova

Senior RnD Engineer

MailerLite

Sep 2025 - Current (9 months)

• Architected and developed AI powered internal and client-facing tooling and product systems using Node.js, Laravel, Vue.js, MCPs, ChatGPT apps. • Designed scalable backend systems and APIs in Node.js and Laravel focusing on maintainability, modular architecture, and long-term extensibility for millions of users. • Integrated AI automation tooling into daily engineering workflows and kept up-to-speed with latest development in prompt engineering. • Took ownership of technical design decisions, balancing speed of execution with scalability and code quality. • Established monitoring, alerting, and production health workflows across distributed systems, proactively identifying performance bottlenecks and reducing incident response times. • Co

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Senior/Lead Fullstack Developer (Web3)

Seedify Fund

Dec 2023 - Aug 2025 (1 year 9 months)

• Led the development of the Seedworld app, overseeing architecture • Designed NFT staking, Game NFT sales, integrated with blockchain operations and backend APIs for seamless user experiences. • Developed token burn mechanism and managed Token Generation Event (TGE) bringing in over 5M in on-chain profit. • Ensured code quality using Next.js, TypeScript, React, Node.js, MongoDB, Context API and React Query for performance optimization. • Optimized state management and implemented server-side caching, reducing page load times from 9+ seconds to under 1 second. • Maintained high test coverage with unit and integration tests for improved reliability and security. • Established and optimized monitoring and alerting strategies using Sentry and

Senior Software Design Engineer (Open Source)

Mattermost

Jan 2020 - Dec 2023 (4 years)

• Promoted from Software Engineer II (intermediate) to Software Engineer III (Senior). • Developed and upheld a high-performance chat web app for 100K+ active users using React, Redux, TypeScript, and Golang. • Ensured code quality and best practices using code-splitting, reusable hooks, Redux Saga and more. • Designed and implemented accessible, responsive UI components (design system) with SCSS, HTML, Material-UI. • Improved iOS and Android app performance through state management optimization, API efficiency, and delivery of 10+ features. • Led code reviews and mentored 20+ open-source contributors to ensure adherence to best practices. • Initiated CI/CD pipeline automation with GitHub Actions, reducing deployment time by 40. • Preserved

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Software Engineer - Front end

Friday Versicherung

Jan 2018 - Jan 2020 (2 years 1 month)

• Developed and maintained frontend systems with React, Redux, TypeScript, and React Hooks for enhanced user experience. • Integrated GraphQL APIs with Prismic CMS to enhance content delivery and data-fetching efficiency. • Led a design sprint with product and UX teams, facilitating a successful product launch with over 300 clients onboarded in the first week. • Diagnosed and resolved production incidents by troubleshooting infrastructure and application-level issues, ensuring platform stability. • Established thorough test coverage with Jest and React Testing Library to boost application reliability and minimize regression risks.

Junior Software Engineer

Babbel

Jan 2017 - Jan 2018 (1 year 1 month)

• Contributed significantly to customer acquisition and tooling improvements, fueling growth in the language learning industry. • Oversaw the migration from Jekyll CMS to a cloud-based solution, cutting infrastructure costs and boosting scalability. • Executed the transition from Handlebars/Flux to React/Redux, elevating application performance, maintainability, and user interaction. • Created a language skill grading app with JavaScript, React, and Redux, streamlining onboarding and enhancing user assessment accuracy. • Ensured top-tier code quality and long-term stability with over 97% test coverage; conducted unit and integration tests using Jasmine, Karma, Mocha, Jest, and Selenium.

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