Backend / AI Systems Engineer

Experience building LLM-powered systems in production, including prompt iteration, tool/function calling, retrieval patterns, and agent orchestration.

Experience operating high-scale retrieval systems (vector + lexical search) and measuring/tuning retrieval quality and latency in production.

Experience building evaluation frameworks (quality metrics, dataset curation, regression testing).

Experience with AWS CDK and operating production services in AWS.

Embrace autonomy and accountability in a flexible, remote work environment; we focus on outcomes and empower you to determine how to get the job done

Access our company-paid group benefits for you and your family, with $1,000 towards mental health support

Disconnect during our holiday closure and take advantage of our generous time off policies throughout the year

Enjoy monthly paid meals, an annual wellness allowance to support your well-being and parental leave top-ups as your family grows

Secure your stake in our success; you’ll receive competitive stock option grants as a pivotal early employee

Embrace autonomy and accountability in a flexible work environment; we focus on outcomes and empower you to determine how to get the job done

We are committed to creating an inclusive and supportive candidate experience. Should you require any accommodation whatsoever during the interview process, please inform us without any hesitation. Spellbook is dedicated to ensuring equal treatment and opportunity in all phases of recruitment, selection, and employment, in compliance with employment law. We do not discriminate based on gender, race, religion, national origin, ethnicity, disability, gender identity/expression, sexual orientation, veteran or military status, or any other protected category. Spellbook is proud to be an equal opportunity employer, fostering a culture of inclusivity and maintaining a work environment that is free from discrimination, harassment, and retaliation.

Spellbook uses artificial intelligence (AI) responsibly to support administrative and efficiency-focused aspects of our recruitment process. This includes activities such as drafting job descriptions, generating interview questions, note-taking and recordings, and supporting sourcing and scheduling workflows. All candidate evaluations, interviews, and hiring decisions are made by members of the Spellbook team. While AI tools may assist with screening and assessment, they do not replace human judgment in selection decisions. Our use of AI is intended to streamline routine tasks, improve consistency, and enhance the overall candidate experience. We are committed to upholding principles of fairness, transparency, and accountability in all hiring activities. Spellbook regularly reviews its recruitment practices to mitigate bias and to ensure alignment with applicable laws and evolving best practices.