Andrii Khmelovsky's Resume

About

Technical leader and full-stack engineer with over 10 years of experience architecting and delivering scalable solutions across fintech, Blockchain, and SaaS domains. Proven track record in guiding products from concept to market success, managing cross-functional teams of up to 20 professionals, and fostering high-performance engineering cultures. Adept at bridging technical and business perspectives to drive innovation and alignment across stakeholders. Experienced in AI and ML systems, leveraging modern JavaScript and TypeScript ecosystems (React, Next.js, Vue, Svelte, Angular) for CSR/SSR/SSG/PWA applications, and backend development with Node.js, Nest.js, Go, and Rust. Skilled in designing and deploying monolithic, microservice, and serverless architectures on AWS, Google Cloud, and Azure.

Work Experience

Payabl.

Jan 2025 - Present

Senior Software Engineer

Developing web applications and microservices for business banking, focus on core functionality for payments, transaction validation, detailed financial reporting and administration.

  • Implemented new features and improved existing codebase across multiple banking services.
  • Built and optimized transaction workflows, payment validations, and reconciliation processes.
  • Designed and maintained reporting modules for financial data analysis and audit tracking.
  • Performed code reviews, shared technical solutions, and aligned engineering approaches across teams.
  • Took full ownership of features from technical design to production deployment.
  • Ensured high code quality through test coverage and hands-on deployment validation.
  • Contributed to architecture decisions, scalability enhancements, and release stability.
  • Next.js
  • TypeScript
  • Python
  • Postgres
  • Antd

Teaching Strategies

Oct 2023 - Oct 2024

Staff Software Engineer

Developing intuitive and impactful educational software for teachers.

  • Owned full feature lifecycle, from refinement and design to final delivery and deployment.
  • Implemented complex data-driven interfaces with filtering, reporting, and visualization logic.
  • Maintained high UI precision, often building from conceptual designs using MUI and custom components.
  • Ensured code reliability through solid test coverage and active involvement in deployment validation.
  • Conducted code reviews, improved architecture, and contributed to better performance and maintainability.
  • Collaborated with cross-functional teams to deliver scalable and maintainable solutions.
  • JavaScript
  • Node.js
  • React
  • MUI
  • MariaDB
  • Python

Thirty Capital

Feb 2021 - Oct 2023

Frontend Tech Lead

Built a CRE asset management system for real estate portfolio managers to analyze and manage investments.

  • Led the frontend stream of 10 engineers, overseeing feature development and delivery.
  • Took full feature ownership, from technical design to production deployment.
  • Conducted code reviews, mentored team members, and participated in hiring interviews.
  • Designed application architecture and optimized system performance.
  • Implemented new features, filters, charts, and detailed reporting modules.
  • Managed releases, ensured test coverage, and maintained alignment with stakeholder requirements.
  • Next.js
  • TypeScript
  • Module Federation
  • MUI
  • Python
  • Postgres

Lucky Voice

Jul 2019 - Feb 2021

Frontend Engineer → Frontend Team Lead

Led frontend development for a karaoke bar network, building mobile apps, terminal applications, and web platforms to enhance customer experience and operational efficiency.

  • Led feature development and bug fixing across multiple platforms, ensuring seamless user experience
  • Planned product roadmaps, wrote technical specifications, and managed sprint task distribution
  • Conducted technical interviews and participated in hiring processes to build high-performing team
  • Mentored frontend developers and conducted code reviews to maintain high code quality standards
  • Implemented comprehensive test coverage and established quality assurance processes
  • Investigated and adopted new technologies to enhance cross-platform development workflows
  • JavaScript
  • React.js
  • Electron
  • React Native
  • Python
  • MySQL

Nurburgring GmbH & Co. KG

Oct 2017 - Jul 2019

Frontend Engineer

Developed comprehensive news and booking platform for motorsport track services including concerts, races, and test drives, with integrated e-commerce for merchandise sales.

  • Developed features and resolved performance bottlenecks to optimize application speed
  • Implemented headless Magento integration for merchandise sales and payment processing
  • Managed comprehensive test coverage and maintained code quality standards
  • Developed smart TV applications for advertising campaigns and live race streaming experiences
  • Deployed separate microfrontends on AWS infrastructure
  • JavaScript
  • Preact
  • JQuery
  • Ruby on Rails
  • Postgres

Independent Engineer

2016 - 2025

Fractional CTO · Tech Lead · Developer · Consultant

Work independently on projects addressing diverse business needs from concept to launch, providing consulting, development, and technical support with focus on user experience, performance optimization, and application speed.

  • Deliver end-to-end solutions from concept to launch for diverse business requirements
  • Provide consulting, development, and technical support throughout project lifecycle
  • Optimize user experience and application performance to enhance speed and responsiveness
  • Design and implement full-stack solutions with focus on scalability and efficiency
  • Full-Stack
  • Consulting
  • Architecture
  • Multiple Clients
  • Enterprise

Education

Kyiv College of Information Systems and Technologies, KNEU

2013 - 2017
Junior speccialist in Software Engineering

Institute of Information Technologies in Economics, KNEU

2017 - 2020
Master's Degree in Computer Science

Skills

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Side projects

ISSF

End-to-end web platform for the International Shooting Sports Federation, integrating live broadcasts, performance analytics, and online store

  • TypeScript
  • Next.js
  • AWS
  • PostgreSQL
  • Tailwind CSS

Ello

AI-powered reading coach app with speech recognition technology for children K-3, featuring adaptive learning and interactive e-books

  • TypeScript
  • Three.js
  • Adaptive Learn
  • React
  • React Native
  • MUI
  • Firebase

Brawl3rs

Experimental Web3 + AI project combining meme culture, prediction markets, and interactive battles between user-generated agents

  • TypeScript
  • Next.js
  • Radix UI
  • Ethers.js
  • Blockchain