Haystack is working with a direct employer on this opportunity.

Company

We are using AI Agents to transform customer experience for ecommerce brands. With a proprietary approach to agentic AI, we have a unique opportunity to become the undisputed leader in our industry. We’re looking for excellent candidates to join our dedicated, thoughtful, and hardworking team to help us achieve that goal. We are a global company with offices in London, New York, and people across the world.

Our customers include some of the biggest names in retail including On, Rapha, Air Up, Holland & Barrett, AllSaints, Honeylove, and Clarins.

Role

We are looking for an experienced software engineer to help us build our product. You will be working on the platform and backend services of the product and also the middle layer that sits between third party customer support tools and our proprietary AI platform. We value autonomy, excellence, pragmatism and impact.

Responsibilities include:

• Building microservices for our no-code platform, analytics, admin console, data management functionality and others
• Designing and implementing maintainable and scalable architecture for consuming and providing APIs
• Integrating with 3rd party systems

Required Experience

• Scala (3+ years of real, hands-on experience in Scala in a professional environment)
• Functional programming and hands-on experience with functional programming libraries
• Experience developing HTTP RESTful APIs
• Excellent knowledge of SQL and relational databases (PostgreSQL)
• Knowledge of Terraform (hands-on experience), Docker, AWS
• Experience building and deploying microservices-based architectures
• We use a functional Scala stack, primarily built on the Typelevel ecosystem, including: http4s, Circe, Cats, Cats Effect, FS2, Monix, and Slick.

Interview Process

• Our interview process is designed to be clear, fair, and human — just like how we work day to day.
• Intro Call (40 mins) — A relaxed chat to learn more about you and share what we’re building.
• Technical Stage — Show us how you think and solve problems, including a take-home challenge.
• Culture Stage — We’ll explore how you collaborate, communicate, and align with our team values.
• Final Chat — Meet a senior team member to discuss long-term goals and mutual fit.
• We keep things efficient and most candidates complete all stages within 2–3 weeks.

Benefits

🚀 Thrive in a dynamic start-up culture

💰 £80k - £100k annual salary depending on experience

📈 Stock options

🏝️ 34 days off — 25 annual + 8 public + your birthday!

🎳 Quarterly team socials & perks

💪 Stay fit with a $210 monthly fitness stipend or Third Space membership

🎉 Celebrate your birthday with a day off!

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.