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 webWorking in a small cross-functional team with other experienced hackersExpanding the capabilities of Apify Proxy, adding more protocols and more underlying providers, and implementing internal unblocking capabilitiesResearching 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 othersContributing to proxy-chain and impit, our open-source libraries for proxy handling and request impersonationOur tech stack:Infra: AWS Compute (Kubernetes (EKS), EC2, Lambda), Helm, Terraform, CloudFormation, ArgoCD, MongoDB, Redis, DynamoDB, S3, GitHub ActionsMonitoring: Grafana, Prometheus, OpenTelemetry, Mezmo, Sentry, PagerDutyFrontend: React.js, styled-components, Storybook, Chromatic, Cypress, PlaywrightBackend: TypeScript/Node.js, Nest.js, Next.js, Docusaurus, VitestTools: GitHub, Notion, Google Workspace, SlackOS, 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 servicesStrong skills in developing and debugging with TypeScript/Node.js, or equivalent skills in another language and the ability to learn quicklyFamiliarity with LinuxExperience with AWS, other public clouds, or any technology mentioned above (nice to have)An experiment-driven and collaborative mindsetGood communication skills in EnglishWhy should you work at Apify?Space, support, and autonomy for personal growth, with a direct impact on Apify's successFull-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 snacksFree 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.