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Senior Backend Engineer at ExpressVPN. Location Information: UK, Germany, Poland, Romania, Cyprus. Location: Remote; Poznań (Poland), Bucharest (Romania), London (UK); Aachen (Germany), Nicosia (Cyprus). About Kape. Kape is a global cybersecurity company focused on protecting consumers' digital lives. Our flagship product is a market-leading VPN service, trusted by millions worldwide. Behind this service is a world-class engineering organization solving challenges at scale. We’re growing our . Payments & Marketing Tech team. , the group responsible for the systems that power revenue and growth—from payment processing and subscription management to affiliate networks, licensing, partner integrations, and marketing attribution. We’re looking for a . Senior Node.js Engineer. to join us in building reliable, scalable backend systems—with . Temporal.io. at the heart of it all.. What You’ll Do. Design and develop high-performance backend services using . Node.js. and . TypeScript. Build and orchestrate distributed systems and workflows using . Temporal. Develop APIs and services related to payments, subscription lifecycles, and user licensing. Assist in . migrating from a legacy monolith system. —built in . Go. , . Ruby. , and some . PHP. —to a new . Node.js-based microservices architecture. Collaborate closely with the . app team. to ensure seamless integration between backend services and client-facing applications. Engineer integrations with marketing tools, affiliate networks, partner APIs, and 3rd-party platforms. Participate in . sustaining activities. , including issue triage, incident resolution, and performance tuning of production services. Configure and maintain . SaaS tools. and third-party systems supporting payment and marketing operations. Design scalable, secure, and maintainable technical solutions. in collaboration with engineering leadership, architects, and cross-functional stakeholders. Champion engineering best practices in security, scalability, testing, and observability. Provide technical mentorship and contribute to architectural decisions. What We’re Looking For. 5+ years of backend development experience with . Node.js. Hands-on experience with . Temporal.io. or other workflow orchestration tools. Solid understanding of . microservices architecture. and distributed system design. Proven experience working with . payment systems. , . subscriptions. , or . marketing tech stacks. Skilled in designing and integrating APIs, handling asynchronous communication, and managing vendor services. Experience with cloud infrastructure (preferably AWS), Docker, CI/CD. Strong sense of ownership and the ability to lead complex technical initiatives. Nice to Have. Experience with affiliate tracking platforms, marketing attribution, or CRM tools. Exposure to fraud prevention, chargeback handling, or promotional systems. Familiarity with message brokers (e.g., Kafka, RabbitMQ). Open-source contributions or involvement in the Node.js or Temporal community. Ability to read the code in Go, Ruby, or PHP. Why Join Kape. Build systems that drive and protect a global subscription business. Collaborate with top engineers in a high-impact, growth-focused team. Solve complex problems using modern architecture and tooling. Flexible remote-first work culture and strong support for personal development. Excited to join a team where tech drives growth?. Apply now and help us evolve the engine behind one of the world’s most trusted digital privacy products.. Before you apply. At the moment, we do not sponsor visas in the . EU. . For . Hong Kong. , we require at least two years of working experience and a university degree in a related field. For. Singapore and the UK. , we can only sponsor visas for mid-career or above.. Please upload your resume as a . PDF. and do not include any salary or compensation information in it.. ExpressVPN is one of the world’s leading providers of online privacy and security services for consumers. Started in 2009, we’ve grown to have millions of active paying customers, a team of more than 700 people worldwide, and a brand recognized by hundreds of millions of people in 18 languages and more than a hundred countries. We see huge growth in our industry, and are gaining market share through strong execution.