Mykola Mykhalko

Senior Software Engineer (Frontend) @ Walmart Global Tech

About

With over 15 years in software development, I’ve built my career around creating fast, scalable, and user-focused web applications. I specialize in React, TypeScript, Node.js, and AWS, and I take pride in writing secure, maintainable code that solves real business problems. 🔧 What I Do: I’ve led the development of multiple high-impact web applications - boosting performance by up to 40%, modernizing legacy systems, and improving user experiences across browsers and devices. My work bridges technical execution and business strategy, from integrating complex APIs to mentoring teams and streamlining deployment pipelines. 💡 How I Work: I thrive in cross-functional teams, collaborating closely with designers, product owners, and stakeholders to turn ideas into robust digital solutions. Whether refactoring large codebases or launching new features, I focus on clean architecture, code quality, and continuous improvement. 📈 What Drives Me: I’m passionate about technology that scales and lasts. I stay current with industry trends, experiment with emerging tools, and enjoy mentoring others to raise the bar for engineering excellence. 🤝 Let’s Connect: If you’re building something meaningful and need a technically strong, business-minded engineer who can deliver - let’s talk. I’m open to new challenges and always eager to contribute to impactful projects.

Country

United States

City

Raleigh-Durham-Chapel Hill Area

Industry

Internet

Skill

jest, React.js , Web Performance Optimization, Microservices architecture, Express.js, GraphQL, SPA (Single Page Applications), Asana, GitLab, SVN, Git, JIRA, RESTful APIs, Redux, Responsive Design, Testing and Debugging, Swagger, Chrome OS, CraftCMS, Bootstrap

Experience

Senior Software Engineer (Frontend)

Walmart Global Tech

2025-7 - 2025-11 · 5 mos

Саннивейл, Калифорния, Соединенные Штаты Америки

- Contributed to the International Digital Experiences team, working on large-scale e-commerce frontend applications. - Built and improved reusable UI components using React, Next.js, GraphQL, and modern state management solutions. - Focused on performance optimization, Web Vitals, and frontend best practices for high-traffic consumer products. - Collaborated closely with product managers, designers, and engineers in a cross-functional, distributed team. - Participated in code reviews, refactoring efforts, and improving overall code quality and developer experience.

Senior Full Stack Engineer

Software MacKiev

2023-4 - 2025-7 · 2 yrs 4 mos

Cary, NC, US

- Led the development and maintenance of a high-performance corporate website, improving cross-browser compatibility, performance optimization and runtime efficiency. - Optimized SEO and page load speeds, increasing organic traffic by 83%. - Integrated back-end APIs using TypeScript and React.js, improving response times by 78%. - Collaborated with UI/UX designers to ensure a seamless user experience. - Tech Stack: React.js, TypeScript, Next.js, Node.js, AWS, CraftCMS.

Senior Full Stack Web Developer

Software MacKiev

2018-9 - 2023-3 · 4 yrs 7 mos

Kyiv, Ukraine

- Developed an AWS-based cloud service for genealogical tree backups, ensuring 99.99% uptime. - Implemented a real-time data synchronization mechanism (every 15s) for enhanced user experience. - Managed backend services using Node.js, PostgreSQL, MongoDB, and Docker. - Tech Stack: Node.js, PostgreSQL, AWS, MongoDB, Koa, CircleCI, Docker.

Senior Frontend Developer

Software MacKiev

2017-9 - 2018-9 · 1 yr 1 mo

Киев, Киев, Украина

- Software Development of educational Web Application app using Angular 2 framework. - Chrome OS and mobile version building. - Adaptive Design - Cross-Browser Compatibility

Senior Frontend Developer

Software MacKiev

2013-5 - 2017-9 · 4 yrs 5 mos

Киев, Украина

- Development of software solutions primarily in the education sector, focusing on web engines, e-learning platforms. - Support and maintenance the front end of the corporation's website and portals. - Utilization of a range of technologies and frameworks, including Moodle PHP, Gulp, Webpack, and various JavaScript libraries such as pixi.js, jQuery, requires, backbone, and AngularJS.

Senior Frontend Developer, Lead Web Developer

TYME (OMP), Ltd

2013-1 - 2018-7 · 5 yrs 7 mos

Киев, Киев, Украина

- Played a pivotal role in enhancing the functionality and user experience of cash-in terminals. - The responsibilities extended across multiple domains, from software development to project management and client engagement. - Ensuring the highest standards of quality, communication, and adherence to project timelines. - Developed provider gateways using PHP, and modules for payment ledger. - Conducted negotiations with technical specialists of clients. - Prepared technical specifications for subordinates. - Browser and Platform Flexibility.

Frontend Developer

Qiwi

2009-2 - 2013-5 · 4 yrs 4 mos

Киев, Киев, Украина

- Implementation the interface of cash-in terminals and supported the functional. - Developed Flash software for interface of terminals. - Implementation provider's gateways using PHP, and modules for payment ledger. - Conducted negotiations with technical specialists of clients.