Senior Rails Back-End Developer

**Company Overview** At Hubstaff, our mission is to empower people to have their most productive workday. We do this by providing the industry\-leading workforce analytics and time tracking platform for remote and distributed teams. We’ve been fully remote for over a decade—long before it became a trend—and we continue to believe that remote work represents the most significant shift in the modern workplace since the advent of the PC. Our platform helps more than 95,000 businesses track time, manage schedules, and automate payments with transparency and accountability at its core. We’re a product\-led company with a winning culture, strong momentum, and a long\-term vision: to become an essential part of every remote company’s tech stack. And we’re just getting started. **The Role** We’re hiring a **Senior Rails Back\-End Developer** to join our engineering team. This is a full\-time (40 hrs/week), remote position with long\-term potential. You’ll focus on architecting, scaling, and optimizing the back\-end systems that power our SaaS platform. From designing high\-volume APIs to optimizing database performance and ensuring system reliability, your work will be foundational to Hubstaff’s continued growth. We value stability and deep product knowledge. We’re looking for engineers who see themselves growing with a product and team for years, not just their next short\-term contract. **What You’ll Do** * Design, build, and maintain services and features using **Ruby on Rails** . * Architect scalable systems that handle millions of records and high concurrency. * Identify and resolve performance bottlenecks across database, application, and infrastructure. * Implement background job processing (Sidekiq, Redis). * Write automated tests (RSpec). * Collaborate with the Engineering Manager and cross\-functional teams to shape technical direction. * Contribute to code reviews, documentation, and planning sessions. * Ensure high reliability and scalability of core services. **What You Should Have** * 7\+ years of professional development experience, including 5\+ years building and maintaining **production Rails applications** . * Strong database expertise (PostgreSQL or MySQL), including schema design and query optimization. * Experience with background job frameworks and async processing. * Proven experience designing systems for performance and scale. * Solid understanding of modern architectural patterns (SOA, event sourcing). * Working knowledge of JavaScript is a **nice\-to\-have** , not required. * Experience working asynchronously in fully remote teams. * A history of multi\-year tenure in recent roles. **Nice to Have** * Experience with message queues (Kafka, RabbitMQ) or search engines (Elasticsearch, Solr). * Familiarity with Docker, Kubernetes, AWS/GCP. * Performance tuning in high\-traffic applications. **Location** Hiring in: Argentina, Brazil, Poland, Romania, Spain, Portugal **Compensation \& Contract Type** * Independent contractor (preferred) * $45–55 USD/hour * \~40 hours/week **Why You’ll Love Working with Us** * A remote\-first culture built on trust, autonomy, and async collaboration. * Opportunities to work on technically challenging problems at scale. * Long\-term product focus — build something you can truly invest in over time. * Competitive pay for top talent. ***Inclusion at Hubstaff*** Hubstaff is proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all team members, regardless of background, identity, or lived experience.