Senior Backend Engineer for proxy and unblocking

Apify is the largest marketplace of tools for AI. 25,000 Actors helping people and agents get real-time web data, track competitors, generate leads, or integrate their apps. Actors are built by a global creator community that now earns more than $1M every month. Join us to help people put the web to work. Apify can find missing children , protect consumers from fake discounts across the EU , and feed data to AI chatbots . To support this mission, we're looking for a Senior Backend Engineer to work on proxy infrastructure and unblocking. Anti-bot systems are constantly evolving, and we need to keep our scraping infrastructure ahead of them. You'll expand Apify Proxy, research anti-scraping services, and build internal tools that use browser fingerprinting, human-like interactions, and session management to keep data flowing. If you enjoy solving hard technical problems and contributing to open-source proxy libraries, this role might be for you. What you'll be working on: • Building robots that behave and act like real users to automate human activities on the web • Working in a small cross-functional team with other experienced hackers • Expanding the capabilities of Apify Proxy , adding more protocols and more underlying providers, and implementing internal unblocking capabilities • Researching existing anti-scraping services and implementing new internal services to overcome them by utilizing various browser fingerprinting methods, human-like browser interaction, session management, and others • Contributing to proxy-chain and impit , our open-source libraries for proxy handling and request impersonation Our tech stack: • Infra: AWS Compute (Kubernetes (EKS), EC2, Lambda), Helm, Terraform, CloudFormation, ArgoCD, MongoDB, Redis, DynamoDB, S3, GitHub Actions • Monitoring: Grafana, Prometheus, OpenTelemetry, Mezmo, Sentry, PagerDuty • Frontend: React.js, styled-components, Storybook, Chromatic, Cypress, Playwright • Backend: TypeScript/Node.js, Nest.js, Next.js, Docusaurus, Vitest • Tools: GitHub, Notion, Google Workspace, Slack • OS, code editor, and AI assistant of your choice (Claude premium with unlimited tokens, GH Copilot, Cursor, Gemini, or JetBrains AI) • Process: two-week sprints, code reviews, tests, automating whatever we can, and deploying multiple times per day. Who we’re looking for: • A strong technical background or great professional track record (we're looking for exceptional candidates, no matter the seniority) • 2+ years of industry experience building proxy, fingerprinting, or unblocking services • Strong skills in developing and debugging with TypeScript/Node.js, or equivalent skills in another language and the ability to learn quickly • Familiarity with Linux • Experience with AWS, other public clouds, or any technology mentioned above (nice to have) • An experiment-driven and collaborative mindset • Good communication skills in English Why should you work at Apify? • Space, support, and autonomy for personal growth, with a direct impact on Apify's success • Full-time position in Prague (Lucerna Palace) or Brno (Titanium) 🏰 • Option to work remotely 🛋️ • Flexible working hours (perfect for both night owls 🦉 and early birds 🐥) • Nobody counts holidays as long as the work gets done 💪 • Unlimited Claude for every Apifier. We don't count tokens. Just use them well 🤖 • Stock options and profit sharing 💰 • We welcome pets, kids, and bikes at the office 🐕👨‍👧 • Epic team buildings and offsites 🚢 with biking, canoeing, and other adventures 🪂 • Solid education and training budget, conference tickets, internal “Eat & Learn” sessions, and the possibility to work across teams 👩🏼‍💻👨🏽‍💻 • Generous hardware budget 💻 • Free lunches every day when you're in the office 🌮🍱🍜🍕🥡 • Unlimited supply of ☕ & 🍺 and snacks • Free entry to the wonderful Prague Zoo 🐘 • Free Multisport card 🏋 • Ping-pong, chess, PS5, lightsabers, foosball league after lunch. For more details about Apify and what it is like to work with us, see our Careers page .