Senior Backend Engineer (APIs, Data, and Scale)

• Jellyfish’s engineering team is solving one of the hardest problems in engineering operations: understanding how teams actually organize themselves and deliver work
• To help us get there, we’re looking for a senior backend engineer who loves untangling complexity and building systems that scale
• You’ll join a tight-knit team of senior engineers working to map the real structure of our customers’ engineering organizations
• Teams don’t organize the way org charts suggest. Projects span multiple teams. Dependencies create hidden bottlenecks
• Your job is to build the capabilities that let our product represent team configurations as they actually exist
• This means finding pragmatic solutions—the right abstractions that capture 80% of the problem
• Aspire to handle the complexity, but don’t fall into the completionism trap
• The goal is customers seeing their organization clearly and understanding how teams are performing and projects are progressing
• This role demands someone who can navigate complicated data models, trace dependencies across systems, and design solutions that are both powerful and maintainable
• You’ll work with data from project management tools, version control systems, and collaboration platforms to build a complete picture of how engineering work flows through an organization
• Design, plan and implement key features as part of a highly effective development team
• Rapidly deliver value for our customers by pushing features to our AWS-hosted SaaS environment daily, with automated CI/CD pipelines
• Provide technical and product expertise within your team and across the organization
• Communicate effectively about project status and technical issues
• Participate in your team’s agile process and work to continually improve your team’s capabilities
• Provide support for production operations of the Jellyfish product
• Actively participate in a culture supportive of growth and inclusion on your team

Benefits

• Employee Resource Groups (ERGs)
• Flexible workplace (our HQ is in Boston, MA but Jellies live all over the US)
• Stock options so you can be a part of Jellyfish’s future success
• Flexible time off (plus 13 company holidays)
• Paid parental leave
• Pet insurance
• Outings and events (team dinners, Red Sox games, game nights and more)
• 401(k) (pre-tax and Roth contribution options)
• Financial wellness resources through Fidelity
• Top-tier medical and dental plans to keep you and your family in good health
• Plans available for vision, voluntary life, accident, critical illness, and hospital coverage – plus we cover the costs for short term and long term disability coverage
• Commuter benefits- The best candidates are senior engineers who get energized by complex technical challenges, care deeply about data modeling and system design, and want to build products that help engineering leaders make better decisions
• Strong skills in Python, and passion for building production software systems using Django
• 10+ years of experience building SaaS products with a focus on Back End development
• Expert-level abilities in data modeling in relational database systems and experience with and interest in other database technologies such as columnar systems
• Experience with scaling, performance, and benchmarking of APIs and data processing systems
• Curiosity - great at asking questions, figuring out what needs to be done, building consensus, and executing
• Love learning new things and teaching others what you know
• Fluency with tools such as Copilot, Cursor, Claude Code, Kiro and a track record of using them to build and ship fast
• Have worked in or interested in a growth-stage startup
• Strong communication skills
• Enjoyment of collaborative work