# Vitalii Tereshchenko > Frontend Software Engineer @ Allen Institute | UI & UX Developer | React, Typescript & JavaScript | 6+ years of Software Development Experience Location: Seattle, Washington, United States Profile: https://flows.cv/vitaliitereshchenko I am a Frontend Engineer with over 6 years of experience building high-performing, accessible web applications across the e-commerce and non-profit sectors. My expertise lies in transforming complex business requirements into scalable, maintainable codebases that serve thousands of users. Key Achievements & Impact: End-to-End Ownership: Led frontend strategy across multiple organizations (3+), overseeing the full development lifecycle - from architectural ideation and UI/UX designs to deployment, post-launch optimization, and long-term support. Scale & Delivery: Architected and delivered dozens of core features and complex system modules, consistently prioritizing performance, industry best practices, and code maintainability. Technical Leadership: Authored 15+ comprehensive technical specifications and collaborated with cross-functional teams to streamline development workflows and elevate code quality. System Modernization: Successfully managed large-scale migrations and refactored legacy systems into modern React/TypeScript architectures, significantly reducing technical debt without disrupting the user experience. Technical Toolkit: Languages: JavaScript (ES6+), TypeScript Frameworks: React, Next.js, Redux, Tailwind CSS, Material UI, Bootstrap Tools & Culture: Git, Jest/Cypress, Figma, CI/CD, Jira/Agile/Scrum, Confluence I thrive in collaborative, diverse environments where clear communication and clean code are the standard. Let’s connect to discuss how I can help build your next high-impact web solution! ## Work Experience ### Software Engineer II @ Allen Institute Jan 2026 – Present | Seattle, Washington, United States ### Software Engineer I @ Allen Institute Jan 2024 – Jan 2026 | Seattle, Washington, United States - Working on the Allen Institute for Immunology team's Human Immune System Explorer (HISE) to help accelerate scientific research. - Building bioinformatics tools for scientists and data analysts, specifically visualization tools and content management systems for immunology research scientists and computational biologists. ### Software Engineer @ Innovis Solution Jan 2023 – Jan 2024 | Seattle, Washington, United States Formalizing client requirements into technical specifications. Developing frontend and backend for 3+ projects catering to small businesses. Collaborating with and managing 5-10 volunteers to streamline the development process and accomplish tasks. - Developing user interfaces and implementing designs using HTML, CSS, JavaScript, and TypeScript. - Utilizing the React.js library to streamline the frontend development process. - Designing and implementing server-side logic using Node.js. - Creating and managing databases, ensuring efficient data storage and retrieval. - Developing and maintaining RESTful APIs for seamless communication between the front-end and back-end. - Performing regular updates, patches, and maintenance tasks to ensure long-term stability. - Set up Git repositories, assign collaborators, and perform code reviews. - Managing git conflicts and branch mergings. ### Front End Engineer @ Social Systems Jan 2022 – Jan 2023 Led the development of a front-end part of a tour booking website with over 100 components. Mentored two entry-level developers, performed code reviews, testing and debugging. Migrated the project to TypeScript resulting in significant impact on application sustainability and scalability. https://gotour.ru ### Front End Engineer @ IntraVision Jan 2020 – Jan 2022 Developed customer-facing web pages for Daimler’s Mercedes-Benz official website, which receives over 100,000 monthly visitors, using React.js, TypeScript, and SCSS. Collaborated with designers, QA, developers, and managers to deliver reliable and accessible frontend solutions. - Worked independently in a fast-paced environment and initiated React application code refactoring, systematically trimming bulky libraries resulting in a remarkable 18% improvement in initial page rendering speed. - Collaborated with a backend team to engineer a user-friendly CMS, empowering non-technical personnel to manage website content. This resulted in significant weekly time savings of around 16 hours for the technical team. - Performed thorough code refactoring, translating legacy JavaScript code and wireframes into modern React and TypeScript. Improved code maintainability and readability, resulting in a 20% reduction in bug reports from QA. - Identified crucial Webpack misconfiguration, gave constructive feedback, and applied problem-solving, achieving a notable 63% reduction in project build times. ### Web Development Instructor @ IT school "Hello World"​ Jan 2020 – Jan 2020 Taught fundamentals of web development, including JavaScript, HTML, and CSS, to over 20 students in one-on-one sessions. Reviewed and edited teaching materials to ensure relevance, engagement, and accessibility. - Delivered personalized web development instruction in individual sessions for 20+ students aged 11 to 17, covering HTML, CSS, and JavaScript. - Simplified teaching materials that contributed to a 10% increase in exam scores. - Received a 95% satisfaction rate from student surveys regarding the accessibility and engagement of provided web development lessons. ## Education ### Bachelor's degree in Computer Science Moscow Aviation Institute (National Research University) Jan 2016 – Jan 2020 ### Software Engineering Bootcamp Per Scholas Jan 2023 – Jan 2023 ## Contact & Social - LinkedIn: https://linkedin.com/in/vitalii-t --- Source: https://flows.cv/vitaliitereshchenko JSON Resume: https://flows.cv/vitaliitereshchenko/resume.json Last updated: 2026-03-29