AVAILABLE FOR WORLDWIDE REMOTE PROJECTS
ARCHITECTING
THE DIGITAL
FRONTIER
A highly skilled JAVASCRIPT ENGINEER SPECIALIZING IN REACT NATIVE & NEXT.JS
EXPLORE SERVICESREACT NATIVE
Building cross-platform mobile applications that feel truly native. Expert in offline caching, push notifications, IAP, and App Store deployment with Fastlane.
- — REACT NATIVE
- — EXPO SDK
- — FASTLANE
- — DETOX / MAESTRO
NEXT.JS & REACT
Server-rendered, CMS-driven, accessible web applications. Specializing in high-performance React ecosystems with TypeScript and modern tooling.
- — NEXT.JS / REACT
- — TYPESCRIPT
- — GRAPHQL / APOLLO
- — TAILWIND / STYLED
NODE.JS & AWS
Scalable backend services and cloud infrastructure. Experience with AppSync, Cognito, Amplify, and CI/CD pipelines with Jenkins and Bitrise.
- — NODE.JS
- — AWS / AMPLIFY
- — GRAPHQL
- — FIREBASE
SERVICES
REACT NATIVE DEVELOPMENT
Cross-platform mobile applications for iOS and Android. Expert in offline-first architecture, push notifications, in-app purchases, and seamless App Store/Play Store deployment.
- Native Performance
- Cross-Platform
- Offline-First
- Scalable Architecture
NEXT.JS WEB APPLICATIONS
Server-rendered, CMS-driven web applications with AA accessibility standards. Performance-optimized React applications with TypeScript and modern tooling.
- Server Rendering
- SEO Optimized
- Accessible
- High Performance
AWS & CLOUD INFRASTRUCTURE
Scalable cloud architecture using AWS services including AppSync, Cognito, Amplify, Lambda, and S3. Experience with WebSockets for real-time applications.
- Serverless
- Real-Time
- Auto-Scaling
- Cost Efficient
TESTING & QUALITY ASSURANCE
Comprehensive testing strategies with Jest, Enzyme, Detox, and Maestro. End-to-end testing with Puppeteer and Cypress for bulletproof applications.
- Automated Testing
- E2E Coverage
- CI/CD Ready
- Quality Assured
TECHNICAL CONSULTING
Architecture reviews, technology selection, and team mentorship. Help teams adopt best practices for React Native and Next.js development.
- Expert Guidance
- Best Practices
- Team Growth
- Strategic Planning
APP STORE OPTIMIZATION
End-to-end app deployment with Fastlane, Bitrise, and AppCenter. Experience publishing to both App Store and Google Play with automated release pipelines.
- Automated Releases
- Store Compliance
- OTA Updates
- Analytics
YEARS EXPERIENCE
Building production-grade mobile and web applications
COMPANIES
From startups to enterprise clients like KFC and EPAM
APPS SHIPPED
React Native and Next.js applications in production
REMOTE
Available for worldwide remote collaboration
COMPANIES I HAVE WORKED WITH
EPAM
Enterprise Technology
USTWO
Digital Agency
KFC
Global Restaurant Chain
BETFAIR
Sports Betting
LADBROKES CORAL
Gaming & Entertainment
IMMEDIATE MEDIA
Publishing
TEMPCOVER
Insurance
UIC DIGITAL
Digital Agency
EXPERIENCE
JULY 2025 — Present
Lead Engineer
EPAM SYSTEMS
Worked with a large telecommunications provider on the development of an enterprise-scale IoT and customer management ecosystem. The platform consisted of a React Native customer-facing mobile application and a Next.js web portal for internal operations and device management teams. Contributed to the development of a secure mobile application enabling customers to manage mobile numbers, track data usage, view billing information, and process payments. Implemented real-time usage updates, secure authentication flows, and integration with payment providers. Ensured high performance, reliability, and accessibility across iOS and Android platforms.
MARCH 2025 — AUGUST 2025
Senior javascript engineer
Tempcover
Engineered the complete frontend overhaul for the company’s flagship website as part of a strategic rebrand, leveraging Astro and Tailwind CSS to deliver a modular, highly performant architecture. Implemented component-driven design systems, optimized hydration and load times, and ensured responsive, visually cohesive UI across devices while adhering to modern web performance best practices.
JULY 2024 — FEBRUARY 2025
Senior javascript engineer
Paddy Power
Contributed to the development and optimization of a cross-platform mobile application using React Native, building reusable, maintainable, and strongly-typed components with TypeScript and styled-components. Implemented advanced state management with Redux and developed a custom component library integrated with Storybook to streamline UI prototyping and ensure design consistency. Maintained high code quality through comprehensive unit and integration tests using Jest and Enzyme, executed end-to-end testing with Maestro, and collaborated on CI/CD pipeline development to automate builds and improve deployment reliability.
NOVEMBER 2023 — MAY 2024
Senior javascript engineer
UsTwo
Delivered a greenfield mobile application based on an existing web platform, architecting the app from the ground up using a CMS-driven content model to dynamically power in-app experiences. Implemented robust handling for rich media including video and audio streaming, while adhering to strict accessibility standards to ensure an inclusive user experience. Established automated build and release workflows with Fastlane, managing continuous distribution and deployment to both the App Store and Google Play
NOVEMBER 2023 — MAY 2024
Senior javascript engineer
UsTwo
Collaborated with a leading publishing company to enhance their mobile app experience, focusing on in-app purchases (subscriptions), offline caching, audio playback and streaming, background task management, push notifications, analytics, and performance optimization. Designed and implemented robust build and release workflows using Fastlane, overseeing continuous deployment and publishing to both the App Store and Google Play.
MAY 2022 — OCTOBER 2023
Senior javascript engineer
UsTwo
Collaborated with a leading publishing company to enhance their mobile app experience, focusing on in-app purchases (subscriptions), offline caching, audio playback and streaming, background task management, push notifications, analytics, and performance optimization. Designed and implemented robust build and release workflows using Fastlane, overseeing continuous deployment and publishing to both the App Store and Google Play.
NOVEMBER 2021 — APRIL 2022
Senior javascript engineer
UIC Digital
Led the end-to-end development of a web platform using Next.js, architecting a modular, scalable application with server-side rendering and optimized performance for a seamless user experience. Implemented dynamic content delivery through a CMS, integrated rich media handling including audio and video streaming, and enforced accessibility standards. Oversaw CI/CD pipelines, automated deployments, and code quality practices to ensure maintainable, high-performance production releases.
MARCH 2021 — NOVEMBER 2021
Senior native engineer
KFC UK & Ireland
Collaborated with a cross-functional team to reimagine and redesign an existing business application, contributing to the full product lifecycle from concept to deployment and post-launch iterations. Developed innovative, future-proof features by architecting the app for dynamic configurability through CodePush, remote configuration, and remote translations, enabling rapid feature updates without app store releases and ensuring a scalable, maintainable codebase for long-term growth.
SEPTEMBER 2020 — MARCH 2021
Senior javascript engineer
USTWO
Contributed to a company-wide re-platforming initiative for a client, developing a next-generation iteration of an existing application built on a server-side rendered (SSR), CMS-driven, AA-accessible stack. Collaborated closely with the design team to identify usability challenges, translate wireframes and mockups into scalable, interactive, and maintainable features, and introduce new functionality. Engaged directly with stakeholders to gather requirements, provide technical guidance, and ensure alignment between business goals and engineering solutions throughout the development lifecycle.
2018 — 2020
Senior Frontend Developer
LADBROKES CORAL / BETFAIR / IMMEDIATE MEDIA
Delivered high-performance web and mobile applications across betting and publishing industries. Led re-platforming projects moving to SSR, CMS-driven, accessible stacks with Next.js. Built real-time analytics dashboards with React and GraphQL.
2016 — 2018
Fullstack Developer
CROWDFORM / ADEO WEB / TAUPKASE
Built isomorphic PWAs and React Native mobile apps. Integrated backend services with Node.js including payments, Redis queue jobs, and service workers. Developed enterprise applications and e-commerce platforms from concept to production.
I BUILD SOFTWARE THAT
SCALES WITH YOUR AMBITIONS.
Every line of code I write is crafted with purpose. I combine deep technical expertise with a product-focused mindset, ensuring that what I build not only works flawlessly but also drives real business outcomes.
From early-stage startups to enterprise platforms, I transform complex requirements into elegant, maintainable solutions. My work has powered fintech systems, e-commerce platforms, and SaaS products used by millions worldwide.
USER-CENTRIC DESIGN
Every application I build starts with the user. High-performing, accessible interfaces that work seamlessly across devices and platforms.
FUTURE-PROOF CODE
Architecting for growth and maintainability. TypeScript, modular design, and comprehensive testing ensure long-term reliability and easy scaling.
CONTINUOUS DELIVERY
Automated CI/CD pipelines, Fastlane deployment, and CodePush updates. Ship features fast without compromising stability or quality.
TECHNICAL ARSENAL
PROCESS
A structured yet flexible approach that balances thorough planning with agile execution.
DISCOVERY
UNDERSTAND & ANALYZE
Deep dive into your business objectives, technical requirements, and user needs. We establish clear success metrics and project scope through collaborative workshops.
ARCHITECTURE
DESIGN & PLAN
Technical architecture design, technology selection, and project roadmap creation. Detailed specifications ensure alignment before development begins.
DEVELOPMENT
BUILD & ITERATE
Agile development with bi-weekly sprints and continuous delivery. Regular demos and feedback loops ensure the product evolves with your needs.
DEPLOYMENT
LAUNCH & OPTIMIZE
Production deployment with comprehensive testing, performance monitoring, and documentation. Handoff includes training and ongoing support options.
TESTIMONIALS
Ernestas delivered exceptional work on our React Native app. His expertise in mobile development and attention to detail made the entire project seamless from start to finish.
Project Lead
USTWO
Digital Agency
An outstanding engineer who understands both the technical and business sides. His work on our CMS-driven web platform exceeded expectations and delivered great results.
Engineering Manager
IMMEDIATE MEDIA
Digital Publishing
Ernestas transformed our mobile application with modern architecture patterns. The codebase is now maintainable, testable, and ready for scale.
Tech Lead
KFC
Global Restaurant Chain
FAQ
Most projects range from 8-16 weeks depending on complexity. I provide detailed timelines during our discovery phase, with clear milestones and regular check-ins to ensure we stay on track.
Absolutely. I have 8+ years of experience working with distributed teams across multiple time zones. I use async communication tools, clear documentation, and scheduled sync meetings to ensure seamless collaboration.
My core expertise is in the React ecosystem (React, Next.js, React Native) with TypeScript. On the backend, I work with Node.js, PostgreSQL, and various cloud providers including AWS and Vercel.
Yes, I offer retainer agreements for ongoing development, maintenance, and support. This includes bug fixes, security updates, performance monitoring, and feature enhancements based on your needs.
I provide weekly status updates, maintain shared project documentation, and schedule regular video calls for demos and feedback. I adapt to your preferred tools whether that is Slack, Teams, or email.
I offer both project-based fixed pricing and hourly/daily rates depending on the engagement type. After our initial consultation, I provide a detailed proposal with transparent pricing and no hidden costs.
LET'S BUILD
TOGETHER
Have a React Native or Next.js project in mind? I am available for worldwide remote collaboration. Fill out the form and I will get back to you within 24 hours.
PHONE
+44 7948 039057LOCATION
United Kingdom