Web Infrastructure Engineer

1 tydzień temu

Poland Attio Pełny etat
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. We recently announced our $52M Series B, led by GV (Google Ventures), with support from Redpoint, Balderton, Point Nine, and 01A. 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 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 runtime, TypeScript pipelines, and I/O efficiency)

  • Use profiling and benchmarking techniques to identify and eliminate bottlenecks and memory leaks in our 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)

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