Senior Full-Stack Engineer, Front-End Leaning
Confirmed on the employer's own hiring board on Oct 18, 2026. First seen by Alion on Aug 27, 2026.
About us
Encord is the universal data layer for AI that helps 300+ AI teams train and run models on the right data. Our platform indexes, curates, annotates, and evaluates data across the full AI lifecycle, from development through production.
Trusted by Woven by Toyota, AXA, UiPath, Zipline, and more. We're an ambitious team of 100+ working at the frontier of AI and have raised $60M in Series C funding from Wellington Management, CRV, Next47 and Y Combinator.
The role
We're looking for great engineers with experience building complex UIs to help build out our editor interface - the part of our product that lets users visualise and annotate their data. We handle a wide range of data modalities, including image, video, audio, text, PDFs, medical images, and data from LiDAR and other sensors in robots and autonomous vehicles.
For this role, we are particularly looking for engineers who are excited about technically challenging frontend work, such as rendering complex 3D/4D scenes with thousands of objects, combining data from several modalities, all while maintaining high performance in the browser.
You'll join us at a crucial stage of accelerated development, as part of a small, highly collaborative group where you'll be a key driver of progress on a core part of our product - operating with a high degree of autonomy and crafting performant, reliable, and maintainable solutions at speed.
What you'll do
Build and own complex UI and editor interfaces for visualising and annotating multi-modal data
Render high-performance 3D/4D scenes with thousands of objects in the browser
Work across the full stack when needed, from backend services to deployment and styling
Take end-to-end ownership of projects, from product and architectural decisions through to deployment, monitoring, and measuring user impact
Collaborate closely with a lean, high-trust team to tackle challenging problems together
Take initiative, be proactive in problem-solving, and continuously seek improvements
Who we're looking for
Experienced: you've seen a lot and built a lot - personally developed and maintained multiple systems from scratch, with a deep understanding of the trade-offs involved in building reliable, performant software at speed
Excited by hard frontend challenges: rendering complex scenes, working across data modalities, and squeezing performance out of the browser
Impact-driven: you want your work to have a tangible outcome for people and aren't satisfied by products that don't see the light of day
A builder: you enjoy all aspects of building a complete product, are comfortable moving across the stack, and love problem-solving from first principles
Comfortable with uncertainty: happy to tackle problems without a predefined solution, and excited to make decisions autonomously as you go
A team player: you contribute your best work and actively help others do the same - you enjoy levelling up those around you
Experience requirements
Strong frontend engineering experience, with production-grade work on complex, high-performance UIs
Proficiency in TypeScript and React
Experience with 3D rendering, WebGL, Canvas, or similar browser-based visualisation technologies is a strong plus
Familiarity with Python and backend development
Experience with Kubernetes and GCP is a plus
Tech stack
- We are technology agnostic at Encord and not looking for experience across all of these - as long as you're open to learning, please apply.
Why Encord
Competitive salary, commission, and meaningful equity in a high-growth startup
Strong in-person culture - most of the team works from our London office 4+ days/week
25 days annual leave + UK public holidays
Annual learning & development budget
Travel for customer visits, events, and conferences across the UK and Europe
Company lunches twice a week
Monthly socials & bi-annual team offsites