Backend Engineer - Extensions

Key Responsibilities

• Own the reliability, performance, and scalability of Extensions capabilities end to end
• Design and build distributed workflows that are efficient, reproducible, and observable in production
• Collaborate closely with Data Scientists on the team to deeply understand requirements and translate them into engineering decisions
• Identify and resolve performance bottlenecks, ensuring Extensions capabilities meet the latency and throughput demands of enterprise deployments
• Contribute to architectural decisions around how Extensions integrates with the broader NEXUS backend
• Write clean, well-tested Python code and hold a high bar for code quality across the team
• Contribute to internal engineering documentation and help establish best practices for backend development within the team

Requirements

• 5+ years of backend engineering experience, with a strong focus on Python
• Excellent Python skills - write clean, idiomatic, well-tested code and know the language deeply
• Solid experience designing and operating distributed systems at production scale
• Strong understanding of concurrency, task execution, and workflow orchestration patterns
• Experience building systems that are reproducible, observable, and easy to debug in production
• Ability to work closely with non-engineering counterparts and translate complex requirements into reliable implementations
• Strong ownership mindset - drive work end to end and care about outcomes, not just output

Nice to Have

• Hands-on experience with workflow orchestration systems such as Temporal, Dramatiq, Celery, or equivalent
• Familiarity with ML infrastructure or experience working alongside data science teams
• Experience with high-throughput data processing pipelines
• Exposure to Kubernetes and container-based deployment environments
• Background in performance profiling and optimization of Python services

Benefits

• Competitive compensation with salary and equity
• Comprehensive health coverage for you and your dependents
• Paid parental leave for all new parents, inclusive of adoptive and surrogate journeys
• Relocation support for employees moving to join the team in one of our office locations
• A mission-driven, low-ego culture that values diversity of thought, ownership, and bias toward action