Senior Software Engineer - Research and Development

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. 

This is an exciting position as we are building a new team within the Engineer function. This team will focus on the application of the latest technology into our product.
In this role, you will work on building software to enhance the visibility and configurability of large language models (LLMs). You will be responsible for rapidly developing tools and platforms to evaluate, iterate, and productionalize models, ensuring their reliability and accuracy.

We are looking for the right candidate, and therefore are flexible on the levelling for this position ranging from junior to mid-level!

Responsibilities:

• Must have at least 4 years of Python experience

• Must have at least 4+ years working experience

• Develop software that provides visibility into LLM models and offers configurability for tuning and evaluation.

• Take a hands-on approach to quickly prototype, test, and iterate on solutions, moving from proof-of-concept to production.

• Employ a data-driven methodology to drive model accuracy, leveraging evaluation results to inform decisions.

• Collaborate with cross-functional teams to integrate developed tools and ensure they meet production standards.

• Communicate findings and ranking metrics clearly to both technical and non-technical stakeholders.

Requirements:

• Open to feedback and happy to work in an iterative position

• Degree in Computer Science or related field, or equivalent experience.

• Strong proficiency in Python

• Experience developing evaluation suites, datasets, and data-driven tools for model reliability testing.

• Ability to rapidly prototype and iterate on solutions while maintaining a focus on production-level quality.

• Strong problem-solving skills and a creative mindset

• Familiarity with cloud platforms such as AWS, GCP, or Azure is a plus.

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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