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 https://blog.apify.com/fighting-child-traffickers-with-technology/, protect consumers from fake discounts across the EU https://blog.apify.com/how-web-scraping-ai-and-the-eu-have-come-together-to-sweep-away-fake-discounts-in-europe/, and feed data to AI chatbots https://blog.apify.com/intercom-customer-support-ai-chatbot-web-scraping/.

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 https://github.com/apify/proxy-chain and impit https://github.com/apify/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 https://apify.com/jobs.