Senior Frontend Developer · Independent contractor
I build fast, accessible frontends for products used by millions.
React, Next.js, React Native and TypeScript, with 7+ years of shipping for The LEGO Group, SITA, RBC Capital Markets and PGL. Remote from Bucharest, working with teams in the UK, the EU and North America.
- 73 marketskids.lego.com, 30 languages incl. RTL
- Millionsof visitors to LEGO Hero Stories in two months
- 65+ airlineson SITA Mission Watch
- 2.7M+peak concurrent viewers, live esports
- Sports EmmyThe International 10 broadcast
Selected work
The LEGO Group
Hero Stories and 3D on kids.lego.com
A new 3D navigation concept for a global kids' platform: built end-to-end, fast on low-end phones and usable by every child.
SITA
From a 3-month MVP to part of Mission Watch
A real-time communication app for airline operations that started as a short contract and became part of SITA's flagship platform.
RBC Capital Markets
Automation and data-heavy dashboards for an enterprise risk platform
Turning a daily manual task into one click, and keeping dozens of live tables and charts responsive.
PGL Esports
Live graphics for esports world championships
Real-time broadcast graphics for audiences of up to 2.7M concurrent viewers, including the Sports Emmy-winning The International 10.
What people I've worked with say
Despite a very tight delivery timeline, he managed to deliver robust, polished work while maintaining a strong focus on the user experience. His contribution was an important factor in the successful delivery of the project, which received very enthusiastic feedback from the customer.
Guillaume JouanjanInnovation Technical Team Lead, SITA Radu has a deep understanding of React and managed to quickly turn figma designs into working implementations running in the browser.
Nikolaj Bang HoldenLead Engineer, The LEGO Group What truly distinguishes Radu is his exceptional knack for problem-solving and his mastery of the React framework. His ability to deconstruct intricate challenges and present innovative solutions is truly commendable.
Veniamin CobuzBroadcast Graphics & Software Engineer, PGL Radu is an outstanding software developer characterized by rigor, speed, and great technical discipline. I was consistently impressed by his commitment to quality—he never leaves things half-done and always delivers solid solutions.
Andra Ioana AchimSenior QA Engineer, SITA
Show 3 more recommendations
…he consistently demonstrates excellent technical skills, a strong sense of ownership, and a genuine passion for building high-quality products. … He is collaborative, supportive, and someone colleagues can rely on when facing complex technical problems.
Joao Paulo BritoInnovation Project Manager & Product Owner, SITA Radu is an amazing developer you'd want on your team. He knows a lot about different development frameworks and works really fast. More than that, he's a super nice guy and easy to work with.
Simon Lund LarsenSenior Project Manager, The LEGO Group Beyond coding, his soft skills ensure fluid and efficient team interactions. Simply put, Radu is a top-tier developer and a solid team player.
Cezar Cobuz Jr.Senior React Native Engineer, worked together at ZentaHub
Excerpts from recommendations on LinkedIn.
What I can help with
Next.js product engineering
App Router, Server Components, i18n and performance for high-traffic, multi-market products.
3D and interactive web
Three.js and React Three Fiber experiences that stay smooth on low-end phones.
Accessibility and the EU Accessibility Act
WCAG 2.2 AA work that holds up: audits, fixes, and complex UI (even 3D) usable by keyboard and screen reader.
Real-time and data-heavy UIs
Live data, WebSockets and Matrix, RxJS and AG Grid dashboards that stay responsive.
React Native and PWA
Cross-platform apps, from a first MVP to a feature customers pay for.
AI-assisted engineering
Claude Code and MCP workflows with guardrails, so teams ship faster without lowering the bar.
How I work
- End-to-end ownership, from Figma and requirements to tested production code.
- Remote from Bucharest (EET), overlapping EU and UK working hours. On-site visits on request.
- B2B through my own company, Sadovei Software Company, already invoicing EU and UK clients.
- Clients bring me back: LEGO re-engaged me without a re-interview, and SITA extended a 4-month contract after the MVP.
My first two weeks on a new team
Week 1: get productive
Access, codebase walkthrough and a first small change in production, plus a quick baseline of performance and accessibility.
Week 2: first real delivery
A feature or fix that matters to the team, shipped with tests, and a short list of the highest-value improvements I found.
After that: own an area
I take ownership of a feature area end-to-end and work directly with product, design and QA.
Clients and teams: The LEGO Group · SITA · RBC Capital Markets · PGL Esports · ZentaHub
Notes from the work
· 9 min read
Accessible 3D: keyboard hotspots over a WebGL canvas
A canvas is a black box to assistive technology. The fix is not to make WebGL accessible, it's to put real HTML exactly where the interaction is.
· 8 min read
A 360° product viewer that doesn't hurt your LCP
Hundreds of frames, one hero video and a slow phone: how staged, low-priority, cancellable loading keeps an image-sequence viewer out of the way.
Have a product that needs a senior frontend contractor?
Tell me about the team, the product and the timeline. Recruiters are welcome too: the essentials are below.
- Role
- Senior Frontend Developer: React, Next.js, React Native, TypeScript
- Engagement
- B2B contract through Sadovei Software Company, invoicing EU and UK clients
- Location
- Bucharest, Romania · remote, on-site visits on request
- Time zones
- Full overlap with UK and EU, mornings with the US East Coast
- Languages
- English (C1), Romanian (native)
- CV
- Download the PDF, a detailed version is available on request