PolyAI · 1 day ago
Senior Full Stack Engineer (Hybrid - Manhattan based 1-2x week)
United States
Full-time
Hybrid
Mid, Senior Level
$170K/yr - $200K/yr
3+ years expPolyAI automates customer service through lifelike voice assistants that let customers lead a conversation. We are seeking an experienced Senior Full Stack Developer (backend-focused) to join our team and shape our cutting-edge low-code platform, working end-to-end on features that enable users to interact with complex AI systems and mentoring junior engineers.
Artificial Intelligence (AI)Call CenterCustomer ServiceEnterprise SoftwareMachine LearningSpeech Recognition
Responsibilities
Architect and Develop: Design and implement our external-facing API that enables developers to build, manage, analyse, and interact with our agents. Help to 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: Build user-friendly APIs and 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
Qualification
Required
3+ years of extensive experience building backend systems
Strong understanding of REST APIs
Strong experience with React and JavaScript
Familiarity with Agile methodologies such as Scrum or Kanban
Experience writing and maintaining unit tests in Python and JavaScript (Jest, React Testing Library, Playwright)
Experience managing secure communication protocols between client and server
Proficiency with Git for collaborative development
Preferred
Experience with WebSockets is a plus
TypeScript preferred
Experience with CSS-in-JS and utility-first CSS frameworks (e.g., styled-components, Tailwind CSS)
Knowledge of Go
Experience with Next.js
Benefits
💰 Participation in the company’s employee share options plan
🏥 Comprehensive health coverage for you and your loved ones
👪 Life Insurance
◻️ STD and LTD
💰 The opportunity to contribute to the company's 401k plan
🏝 Flexible PTO policy + 11 designated company holidays
📚 Annual learning and development allowance
🏡 We’re all about making WFH work for you - that’s why we offer a one-off WFH allowance when you join. Offering perks like noise-cancelling headphones or a comfortable desk chair to boost your comfort and focus!
🧡 Enhanced parental leave
👨👩👧 Company-funded fertility and family-forming programmes
🌸 Menopause care programme with Maven
🌎 Sabbatical Program: 5-week paid sabbatical available after 5 years of employment
Company
PolyAI
PolyAI develops conversational artificial intelligence software that enables organizations to automate customer service interactions.
201-500 employees
H1B Sponsorship
PolyAI has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2024 (1)
Funding
Current Stage
Late StageTotal Funding
$202MKey Investors
HedosophiaGeorgianKhosla Ventures
2025-12-15Series D· $86M
2024-05-16Series C· $50M
2022-09-07Series B· $40M
Leadership Team
Nikola Mrkšić
Co-founder & CEO
Pei-Hao Su
Co-founder
Recent News
alleywatch.com
2025-12-24
2025-12-20
Company data provided by crunchbase