Job Overview

Senior Software Engineer – Gen AI Team at Butternut Box | B Corp

We are building generative AI solutions that enhance daily life for dog owners. The role is for a senior engineer who will lead the AI skunkworks effort, ship impactful products quickly, and partner closely with product, engineering, and design teams.

Responsibilities

• Work directly with product managers, designers, and stakeholders to ship AI‑powered tools that solve real customer problems.
• Ship early prototypes, iterate based on feedback, and maintain a rapid MVP mindset.
• Collaborate daily with the Director of Engineering and Head of Product to shape the AI roadmap and technical strategy.
• Deploy cutting‑edge LLMs (OpenAI, Claude, Llama, etc.) at scale and integrate them into Ruby on Rails, React, GraphQL, and Typescript services.
• Own product quality, testing, documentation, and resilience while balancing speed and impact.
• Mentor teammates, share knowledge, and embody the company’s #DedicatedandDetermined value.

Qualifications

• Strong customer‑focused, product‑mindset; skilled at prioritizing outcomes over everything else.
• Experience building software that ships quickly, iterates rapidly, and gathers user‑centric feedback.
• Comfortable navigating ambiguity, ideation stages, and early‑stage experimentation.
• Pragmatic technical debt management: balance resilience, testing, documentation, and pragmatic trade‑offs.
• Passion for startups, small teams, and dog‑food industry.
• Obsessed with dogs and excited about AI innovation.

Hiring Process

• Initial 45‑minute introductory call with the recruiter.
• Take‑home technical task delivered via email.
• 60‑minute technical interview where you run through your task and discuss real examples.
• 75‑minute final interview in West London with peers and senior leadership.
• We respond personally to all applicants and are not looking for recruitment agency support.
• Visa sponsorship is not available for this role.

About Butternut Box

Butternut Box is a B‑Corp certified dog‑food company that delivers freshly prepared, wholesome dog food cooked like at home and delivered in perfect portions. Our mission is to help dogs live healthier, happier, and longer lives while leaving humans smiling after every interaction.

Benefits

• 25 days holiday (plus 8 bank holidays) + 1 extra day for every year of service.
• 5 paid “paws” days per year for learning and wellbeing.
• £500 personal learning & development budget.
• Enhanced parental leave (52 weeks maternity, 26 weeks paid paternity).
• Co‑working office space, flexible working hours, and full work‑from‑home options.
• Cycle‑to‑work scheme and private medical, dental & fertility treatment insurance.
• Time off for pregnancy loss and fertility treatments.
• Paid sabbaticals for team members with 5+ years at Butternut.
• Discounted gym access via MyGymDiscounts.
• Office dogs (Ajax, Brio, Basil, Chorizo, Lenny, Jasper, Peggy, Pip and many more).
• Butternut Box employee discount.

Equal Opportunity Employer

Butternut Box is an equal‑opportunity employer. We welcome people of all nationalities, backgrounds, experiences, abilities, and perspectives. We value diversity, inclusion, and building an inclusive, supportive workplace for all employees.

Application Closing

There is no closing date. We encourage applicants to apply as soon as possible.