Senior Full Stack Software Engineer (Must be London)

^{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.} 

<sub>We are seeking an experienced Senior Full Stack Developer with a strong backend focus to join our team and help shape our 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. as well as mentoring junior engineers along the way. If you are passionate about Python, React, and building tools that empower non-technical users to get the most out of AI, we would love to hear from you!

Requirements</sub>

• _{Architect and Develop: Build and enhance our no-code platform, enabling non-technical users to configure sophisticated dialogue systems and voice experiences.}

• _{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: 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.}

_{What We Are Looking For:}

• _{Proven Expertise in Python: Extensive experience building backend systems, with a strong understanding of REST APIs (experience with WebSockets 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 Scrum or Kanban.}

• _{Testing Advocate: Experience writing and maintaining unit tests in Python and JavaScript (Jest).}

• _{Security-Minded: Experience managing secure communication protocols between client and server.}

• _{Version Control: Proficiency with Git for collaborative development.}

• _{Additional Skills (Desirable): knowledge of Go and experience with Next.js}
  

<sub>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</sub>

^{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.}

^{Kindly find the Privacy Notice for our recruitment process by following the link here. This document provides important information regarding how we handle your personal data throughout the recruitment journey.}