Shape the future of workforce tech—one integration at a time. Lifelenz is a fast-growing startup building its U.S. base in Chicago. Our AI-powered platform helps global brands like McDonald's optimize labor forecasting, compliance, and scheduling while giving frontline workers more control over their pay, hours, and lives. We're hiring an Integration Engineer to help scale our enterprise integrations across the U.S. You'll work directly with client technology and operations teams, as well as our internal engineering and delivery teams, to implement high-impact solutions that bring the Lifelenz platform to life inside client environments. This role is hands-on, client-facing, and central to how we grow. You'll be joining early as we scale operations in North America, with the chance to help shape the product, process, and team. What You'll Do Lead and support technical discovery with client teams to define integration requirements

Customize and configure the Lifelenz platform to align with client systems and workflows

Build and maintain robust integrations using Ruby on Rails, GraphQL, and PostgreSQL

Collaborate across engineering, product, and client delivery teams to ensure smooth deployments

Diagnose integration issues and improve data processing performance

Support ongoing improvement of our data frameworks and integration playbooks

What You Bring Extensive backend development or systems integration experience

Recent hands-on experience with Ruby and Ruby on Rails

Strong understanding of API-driven architecture and data flows

Experience with GraphQL, PostgreSQL, background jobs, and test-driven development

Familiarity with Linux environments, cloud services (AWS or Azure), and containerization (Kubernetes)

Clear communication skills and a client-first mindset—this is a collaborative, customer-facing role

Bonus: Experience in QSR, retail tech, workforce management, or similar domains

Why Join Lifelenz? Impact: Help scale a platform that empowers both businesses and frontline workers

Timing: Join early and help define our U.S. expansion strategy and technical approach

Leadership: Work directly with the CEO and Director of Client Delivery—both deeply invested in your growth

Mission: Be part of a company that values simplicity, ownership, and putting tech to work for people

If you're a builder at heart who loves solving integration puzzles and delivering real-world impact, we'd love to meet you. Location: Chicago (Hybrid) | Type: Full-Time Salary: $125,000-150,000