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Responsibilities
As a Senior Backend Engineer on the Plan: Spec-Driven Development team, you'll help build GitLab's intent-to-code loop: agentic workflows that turn a stated intent into a refined work item, an implementation plan, and verified, mergeable code. You'll own early-stage backend work across the flows, application programming interfaces, data models, and evaluation systems behind this experience, using Ruby on Rails, Python, PostgreSQL, GitLab Duo Agent Platform, large language model application programming interfaces, and an artificial intelligence gateway.You'll join a small, distributed team working on one of GitLab's highest-visibility product bets, collaborating with design partners toward a public beta. In your first year, you'll lead major features from an unclear problem through release, help shape scope with product and users, mentor other engineers, and influence technical decisions across agent workflows and evaluation methods.What you’ll doLead backend features from early product discussions through technical design, implementation, rollout, and post-launch learning.Build the flows, application programming interfaces, and data models behind agent-generated work items, implementation plans, durable specifications, and mergeable code.Develop evaluation and benchmarking systems that measure workflow quality, token cost, and success rate.Use Ruby on Rails and Python to build reliable production systems, with PostgreSQL, GraphQL, representational state transfer, GitLab Duo Agent Platform, large language model application programming interfaces, and an artificial intelligence gateway.Collaborate directly with product, design, engineers, design partners, and users to shape scope and make practical trade-offs.Coordinate multi-person projects across the team and communicate decisions clearly in GitLab's asynchronous, all-remote environment.Mentor other engineers and contribute to technical direction across the Plan group and related artificial intelligence initiatives.Work in short iterations, share progress through demos, and use results and user feedback to guide what comes next.What you’ll bringStrong Ruby on Rails experience in a large production codebase and production experience with Python.Experience driving substantial projects with several engineers over multiple months, with clear user or business outcomes.A product mindset and experience owning features end to end, including shaping scope, making trade-offs, engaging with users, and learning from adoption after launch.A full stack background with a current focus on backend engineering, plus the ability to read modern frontend code and design effective APIs.Strong application programming interface design and structured query language fundamentals.Experience exploring artificial intelligence-assisted development.The ability to work independently, collaborate across functions and regions, and support others through technical leadership and mentoring. Experience with GraphQL, PostgreSQL performance at scale, or building and evaluating large language model or agent systems is helpful but not required.We welcome candidates with different backgrounds and transferable experience. If you're excited about the role but don't meet every qualification, we encourage you to apply.About the teamWe are a team of four engineers, with two backend and two frontend engineers across Canada and Europe. You'll work in an all-remote, async-first environment with weekly sync calls, retrospectives, demos, and short iterations. This is early-stage work with broad ownership, space for creativity, and a fast pace. For more about our team and its work, see Plan Team Handbook Page and Spec-Driven Development InitiativeHow GitLab Supports Full-Time EmployeesBenefits to support your health, finances, and well-beingFlexible Paid Time Off Team Member Resource GroupsEquity Compensation & Employee Stock Purchase PlanGrowth and Development FundParental Leave Please note that we welcome interest from candidates with varying levels of experience; many successful candidates do not meet every single requirement. Additionally, studies have shown that people from underrepresented groups are less likely to apply to a job unless they meet every single qualification. If you're excited about this role, please apply and allow our recruiters to assess your application.
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