CoLab Software - Senior Back End Developer

• You're an experienced backend engineer who enjoys building systems that make complex information useful. • You like thinking about how data is organized, retrieved, and transformed into something customers can trust. Whether you're designing APIs, optimizing distributed systems, or improving search relevance, you care about building infrastructure that quietly powers exceptional product experiences. • You don't need previous experience building AI products, but you're excited about applying modern AI technologies to solve real customer problems. • You likely won't enjoy this role if: • You prefer working primarily on frontend applications • You want highly defined requirements before starting work • You'd rather optimize existing systems than design entirely new capabilities • You'll thrive if: • You enjoy designing backend systems from first principles • You like difficult infrastructure and data problems • You're curious about AI, search, and knowledge systems • You balance technical excellence with pragmatism and collaboration • 7+ years building production backend software • Strong experience with Python and modern backend development • Experience building APIs, distributed systems, and cloud-native applications • Strong understanding of databases, system architecture, and scalable backend design • Experience working with structured and unstructured data • Comfortable making architectural decisions in evolving product environments • Excellent communication skills with both technical and non-technical teammates • Experience building AI-powered applications or LLM workflows • Experience with retrieval systems, semantic search, or RAG architectures • Experience with vector databases or search infrastructure (TurboPuffer experience is a plus) • Experience with embeddings, ranking, or information retrieval • Experience with event-driven architectures • Experience building enterprise SaaS platforms • The Extra Details • The Extra Details • This is a full-time, permanent position with competitive compensation and stock options • We offer extended health benefits, unlimited paid vacation, and RRSP matching • Our headquarters are in St. John’s, Newfoundland, with flexible hybrid and remote options. This role can be performed remotely from anywhere in Canada. • This role can be performed remotely from anywhere in Canada. • Equity Note • Equity Note • Frequently cited statistics show that people who identify with historically marginalized groups are likely to apply to jobs only if they meet 100% of the qualifications. We encourage you to help us break that statistic and apply even if you don’t meet every single qualification–your potential is what matters most to us.