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- Tasks: Enhance web performance and optimise infrastructure for a cutting-edge AI-native CRM.
- Company: Join Attio, a fast-growing tech company backed by Google Ventures.
- Benefits: Equity, 25 days holiday, and exciting team off-sites in amazing locations.
- Why this job: Be part of a mission to redefine CRM with innovative technology and real impact.
- Qualifications: Expertise in JavaScript, TypeScript, and performance optimisation required.
- Other info: Dynamic environment with opportunities for growth and collaboration.
The predicted salary is between 36000 - 60000 £ per year.
Attio is on a mission to redefine CRM for the AI era. We're building the first AI-native CRM — designed for the most ambitious go-to-market teams. Our team thrives on solving complex technical challenges, delighting our users, and setting a new standard for the industry.
About the role
Our engineering team tackles the toughest challenges so our users never have to. Real-time infrastructure, AI-native architecture, and a frontend that feels effortless — all powered by a team that moves fast, thinks rigorously, and holds an exceptionally high bar for quality.
We're looking for a Web Infrastructure Engineer who lives and breathes the systems, runtimes, and tooling that enable engineers at Attio to ship fast and confidently. You'll own performance across the stack — from the Node.js runtime and TypeScript pipelines to client-side rendering, bundling, and real-user metrics — and help shape the web infrastructure that powers Attio's product.
What you'll do
- Lead initiatives to improve performance in both the frontend (React, web workers, bundling) and backend (Node.js runtime, TypeScript pipelines, and I/O efficiency)
- Use profiling and benchmarking techniques to identify and eliminate bottlenecks and memory leaks in our Node.js services and client-side application code
- Build and integrate metrics, tracing, and performance dashboards to make performance data accessible and actionable across teams
- Reduce build and CI/CD overhead by optimising dependency management, incremental builds, caching strategies, and monorepo workflows
- Define internal best practices, guidelines, and tooling for the web infrastructure that scale with the company
- Represent Attio's Product & Engineering values both internally and externally
What you'll bring
- Deep expertise in JavaScript and TypeScript performance on both client and server, including event-loop behaviour, garbage collection, async I/O, and memory management
- Proven experience designing and optimising internal API and service-layer architecture — particularly frameworks that coordinate data fetching, caching, and state management across large React/TypeScript codebases.
- Strong familiarity with performance tooling such as Chrome DevTools, Node profiler/inspector, flamegraphs, Lighthouse, APM platforms, and runtime exploration tools
- Strong understanding of frontend performance patterns (lazy loading, route-level splitting, bundle analysis, caching strategies, web workers)
- Experience using Real-User Metrics (RUM) to guide and prioritise performance improvements, and comfort working with tools such as Datadog, Sentry, Prometheus, Grafana, or OpenTelemetry
- Systems-level understanding of build and CI/CD pipelines (Yarn, pnpm, npm, esbuild, Vite, Turborepo, Rsbuild, incremental builds)
- Excellent communication skills and the ability to influence engineers across product teams to align on performance strategy
Nice to have:
- Experience with React internals, reconciliation debugging, or custom performance instrumentation
- Contributions to open-source infrastructure projects, performance tooling or JavaScript/TypeScript runtimes
- Familiarity with TypeScript compiler internals, V8 engine behaviour, or WebAssembly tooling
- Familiarity with Go, Rust and native profilers such as dtrace, xctrace and Linux perf
- Experience optimizing large-scale real-time or collaborative web applications
What we offer
- Equity in an early-stage tech company on an incredible trajectory
- 25 days holiday plus local public holidays
- Team off-site in fun places! (We've been to Barcelona, Lisbon, Malta, and Split so far)
Web Infrastructure Engineer in London employer: Attio Ltd
Contact Detail:
Attio Ltd Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Web Infrastructure Engineer in London
✨Tip Number 1
Network like a pro! Reach out to folks in the industry, attend meetups, and connect with people on LinkedIn. You never know who might have the inside scoop on job openings or can refer you directly.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repository showcasing your projects, especially those related to web infrastructure. This gives potential employers a taste of what you can do and sets you apart from the crowd.
✨Tip Number 3
Prepare for interviews by brushing up on common technical questions and performance optimisation strategies. Practice coding challenges and be ready to discuss your past experiences in detail — it’s all about showing how you can add value!
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love seeing candidates who are genuinely interested in joining our mission at Attio.
We think you need these skills to ace Web Infrastructure Engineer in London
Some tips for your application 🫡
Show Your Passion for Performance: When you're writing your application, let us see your enthusiasm for optimising web performance. Share specific examples of how you've tackled performance issues in the past, whether it's through profiling or implementing caching strategies. We love seeing candidates who live and breathe this stuff!
Tailor Your Experience: Make sure to highlight your experience with JavaScript and TypeScript, especially in relation to client and server performance. We want to know how you've designed and optimised internal APIs or service-layer architecture, so don't hold back on those details!
Be Clear and Concise: While we appreciate a good story, keep your application clear and to the point. Use bullet points or short paragraphs to make it easy for us to see your skills and experiences at a glance. Remember, we're looking for someone who can communicate effectively across teams!
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows us that you’re keen on joining our team at Attio!
How to prepare for a job interview at Attio Ltd
✨Know Your Tech Inside Out
Make sure you brush up on your JavaScript and TypeScript skills, especially around performance aspects like event-loop behaviour and memory management. Be ready to discuss specific examples of how you've optimised code in the past, as this will show your deep expertise.
✨Showcase Your Problem-Solving Skills
Prepare to talk about complex technical challenges you've faced and how you tackled them. Use profiling and benchmarking techniques as examples to demonstrate your ability to identify bottlenecks and improve performance across both frontend and backend systems.
✨Familiarise Yourself with Performance Tools
Get comfortable with tools like Chrome DevTools, Lighthouse, and APM platforms. During the interview, mention how you've used these tools to guide performance improvements in previous projects, as this aligns perfectly with what Attio is looking for.
✨Communicate Effectively
Since strong communication skills are essential, practice explaining complex concepts in a simple way. Think about how you can influence engineers across teams to align on performance strategies, as this will be key in your role at Attio.
