Full Stack Engineer (Backend Focus)

PolyAI automates customer service through lifelike voice assistants that let customers lead a conversation. Our voice assistants make it possible for businesses to deliver outstanding customer service that rivals their human agents. Our customers, which include the world’s leading logos, are expanding how they use our platform, driving automation of critical customer service operations and integrating PolyAI into their daily customer service workflows.

We’re seeking a Full Stack Engineer with a strong backend (Python) focus to join our team and help shape our data processing pipelines and cutting-edge low-code platform. This role offers the opportunity to work end-to-end, from design to implementation, on creating features which enable a simple user experience for interacting with complex AI systems. This is an excellent opportunity for a technically proficient individual who is eager to learn and grow within a collaborative, fast-paced environment.

Responsibilities

• Full-Stack Development: Design and implement features end-to-end, using Python for backend services and React (Next.js preferred) for frontend interfaces.
• Create Intuitive Interfaces: Develop user-friendly UIs that simplify and visualise complex AI concepts.
• Champion Best Practices: Lead the team in adopting coding standards and best practices, ensuring a clean, maintainable, and scalable codebase.
• Collaborate: Work closely with cross-functional teams to design, develop, and deliver features that align with the platform’s vision.
• Mentor and Guide: our Senior Engineer would provide technical leadership and guidance to junior engineers, fostering a collaborative and growth-oriented environment.
• Optimise Performance: Improve backend workflows, streamline processes, and enhance overall system efficiency.
  
  

Qualifications

• Proven Expertise in Python and SQL: Extensive experience building backend systems, with a strong understanding of REST APIs. Experience with designing data schemas, building and maintaining data pipelines/ETLs (familiarity with event-driven processing is a plus).
• Frontend Proficiency: Strong experience with React and JavaScript (TypeScript preferred); experience with CSS-in-JS (e.g., styled-components).
• Agile Practitioner: Familiarity with Agile methodologies such as Kanban or Scrum.
• Testing Advocate: Experience writing and maintaining unit tests in Python and JavaScript (Jest).
• Version Control: Proficiency with Git for collaborative development.
  
  

Benefits

Participation in the company’s employee share options plan

25 days holiday, plus bank holidays

Flexible working from home policy

Work from outside of the UK for up to 6 months each year

Enhanced parental leave

Bike2Work scheme

Annual learning and development allowance

One-off WFH allowance when you join

Company-funded fertility and family-forming programmes

Menopause care programme with Maven

Private healthcare and dental cover, discounts on gym members and relaxation apps, and access to a range of mental health programs

At PolyAI, we take great pride in our values—they guide everything we do. We believe that a strong culture leads to meaningful work and lasting impact.

Our Core Values Are

• Only the best: We expect the best from our people, we hire people that expect the best from themselves, and we nurture this drive for excellence.
• Ownership: We care deeply about what we do. We take ownership of our initiatives, decisions and outcomes.
• Relentlessly improve: We demand more from ourselves and are always evolving. Continuous, obsessive improvement is the only way we will transform the world of conversational AI.
• Bias for action: Our world moves quickly and so do we. We take calculated risks and we deliver impact fast.
• Disagree and commit: We are all working toward the same goal. If we donʼt agree with something, we work hard to understand it and when a decision is made, we accept it and give it our all.
• Build for people: We are hyper-focused on delivering the best automated experiences possible so that we can empower people to get exactly what they need, when they need it.
  
  

PolyAI is proud to be an equal-opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All employment decisions at PolyAI will be based on the business needs without attention to ethnicity, religion, sexual orientation, gender identity, family or parental status, national origin, neurodiversity status or disability status.

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