Sr. AI Engineer, Backend

Sr. AI Engineer, Backend

Join our Engineering team in shaping the future of AI-powered shopping experiences across our global software platform.

The Company You’ll Join

At Rebuy, we're on a mission to revolutionize shopping with intelligent, personalized experiences that wow customers around the globe. As a fully remote team, we power some of the fastest growing DTC brands like Aviator Nation, Liquid Death, Magic Spoon, Blenders, Laird Superfoods, Primal Kitchen, and many more.

We believe in ownership, drive, and empathy and strongly uphold that every team member plays a vital role in shaping the future of intelligent commerce. Our culture thrives on collaboration, creativity, and genuine passion. We don’t just build great tech - we build lasting partnerships, a strong community, and a place where people love to work.

The Team You’ll Join

We're a tight-knit, driven team that’s obsessed with team work and excellence. If you thrive on curiosity, crave a challenge, and never stop learning, you’ll feel right at home here. Our flat structure means no red tape, just real impact. Everyone rolls up their sleeves and contributes directly to our mission.

We reward initiative, celebrate high performance, and believe leadership is earned through action. Strong work ethic, smart prioritization, and clear communication are must-haves. Whether you're flying solo or teaming up across departments and with customers, you'll play a key role in moving us forward.

The Problems You’ll Solve

Rebuy and its team members continually strive to create a high-spirited, intentional work environment that stresses performance productivity as well as collaboration and merit.

As a Sr. AI Engineer, Backend, you’ll hone in on our backend AI technology on our r.AI team! You’ll be involved in the development of our AI agent systems that empower our merchants in our Rebuy Engine products and power AI shopping experiences. While you’ll be focused on backend (LangGraph, GCP, GKE, Redis, PostgreSQL, Cloudflare, CRDT/Yjs), there are opportunities to contribute through the entire tech stack to include: TypeScript, React, Next.js, NestJS, LangSmith. In this role, you’ll be a leader in expanding internal use of AI tools to include: Cursor, Claude Code, N8N, MCP.

• Work with a small team building and launching a new product into the market.

• Develop AI systems to include: Agentic Assistants, Generative UI, Search RAG, Tracing and Evals using LangSmith.

• Engineer authentication and authorization across GCP hosted systems

• Build a compelling and easy to maintain codebase with eye toward scalability

• Technical member of our design partnerships that drive our customer focused product development

• Leverage SOTA in Agentic systems to support company development processes such as CI/CD.

Who You Are

We’re stoked to meet you and get to learn more about you, your experience and your interest in joining our team.

The Hard Skills:

• Experience with LLM systems: Gemini, Claude, OpenAI, and/or other.

• GCP or other cloud hosting platforms (AWS, Azure).

• Kubernetes / GKE, Docker, and general containerized workflow experience

• Hands on programming experience: TypeScript/JavaScript, Python, other

• Experience with relational databases (PostgreSQL / MySQL)

• Memory stores and caching (Redis)

• Version control (Git/Bitbucket/GitHub)

• Workload Management tools (JIRA)

• Networking/Security: Cloudflare, IAM, service accounts, secrets management, load balancers, JWT & OAuth

• Monitoring & Ops Experience: Cloud Logging & Alerting and/or Prometheus/Grafana

• AI Engineering tools like Cursor, Claude Code, Copilot, etc.

It’d be great if you also had experience with:

• LangGraph and/or other agentic frameworks

• LangSmith, BrainTrust, Weights & Biases and/or tracing and eval systems

• CRDTs / Sync frameworks: Yjs, Automerge, Loro

• MCP server experience

• Message Brokers/Queues: Pup/Sub, Kafka, RabbitMQ

• GCP BigTable, BigQuery

• Vector Databases: AlloyDB, Pinecone, FAISS, Spanner

• Graph DB: Neo4J, other​​High-throughput APIs: FastAPI, gRPC, GraphQL

• Experience with payment systems, Stripe, other

• eCommerce experience, Shopify, other

The Soft Skills:

• The ability to get your hands dirty in the code and take ownership of solutions.

• A collaborative mindset and work approach with the ability to lead projects and mentor others.

• The ability to thrive in a fast paced environment with a high level of autonomy and responsibilities.

• Excellent communication skills especially being able to explain technical concepts to both technical and non-technical audiences.

• A positive attitude, enthusiasm to be a problem-solver, self-motivated, and a passion about e-commerce.

Who You’ll Meet With

Now let’s get into who you’ll meet during our interview process! After you submit your application and it’s been reviewed by our team, we will reach out to you inviting you to meet with us. From there, you can expect an interview process similar to this:

• Brief introduction call with the Hiring Manager to learn more about you and answer your questions about Rebuy and this role.

• A small project-based assessment to show us your skillset!

• Call with some of our Engineering team members for you to chat more about your experience, the role and working at Rebuy!

• Short final interview with our CEO and COO where you’ll get to learn more about Rebuy.

The Perks You’ll Enjoy

Rebuy is a fully remote company across the U.S. and Canada that aims to provide all of our team with the resources, support and flexibility they need to thrive in their roles.

• Team: We’ve got the best, brightest, most brilliant team members who are excited to meet you! We also like to think we have a good sense of humor.

• Remote Work: With a strong internet connection, you’re able to work from anywhere within the U.S. and Canada.

• PTO: We offer a flexible vacation policy, generous holiday schedule, parental leave and sick policy. There’s other policies too like a birthday holiday!

• Amazing Benefits: 100% free health, dental, and insurance for you and your family. Don’t worry, there’s even more!

• Retirement Plans: For our U.S. employees we offer 401(k) retirement plans and for our Canadian employees we offer a TFSA and RRSP retirement plans. You’ll also enjoy a 3% contribution of your gross salary, no matter where you’re located!

Our compensation reflects the cost of labor across several U.S. geographic markets, and we pay differently based on those defined markets. The U.S. pay range for this position is $130,000 - $180,000 USD annually. Pay within this range varies by work location and may also depend on job-related knowledge, skills, and experience. Your recruiter and hiring manager can share more about the specific salary range for the job location during the hiring process.

Disclosures:

Colorado Application Window Notice

If this role is open to hiring in Colorado (as listed on the job posting), the application window will remain open until at least the date and time stated above, in compliance with Colorado pay transparency regulations. If this role does not have Colorado listed as a hiring location, no specific application window applies, and the posting may close at any time based on hiring needs.

Massachusetts Legal Notice

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Equal Opportunity Statement

Rebuy, Inc. is proud to be an Equal Employment Opportunity employer. We do not discriminate based on gender, race or color, ethnicity or national origin, age, disability, religion, sexual orientation, gender identity or expression, veteran status, or any other applicable characteristics protected by law.

Rebuy, Inc. aims to make rebuyengine.com accessible to any and all users. If you have a disability or special need that requires accommodation to navigate our website or complete the application process, email [email protected].