Senior AI Engineer, Reward Gateway
£85-90k
Employee engagement platform
Open for applications
Employee engagement platform
501-1000 employees
Open for applications
£85-90k
501-1000 employees
Company mission
To make the world a better place to work; improving employee engagement to build better, stronger and more resilient organisations.
Role
Who you are
- Proven experience in shipping production‑grade AI solutions
- Applied AI expertise across LLMs, RAG, agentic workflows, prompt engineering, embeddings, vector databases, hybrid search techniques, and effective chunking strategies
- Strong Python as a primary language, with solid testing practices and CI/CD experience; able to contribute when needed in React, TypeScript, and PHP or Node.js
- Cloud and platform engineering skills, including AWS, Kubernetes, Docker, infrastructure as code, and modern observability tooling
- Hands‑on experience with leading LLM providers such as Anthropic, Claude and OpenAI, with the ability to evaluate additional model providers and approaches
- Familiarity with LLM tooling ecosystems such as LangChain or LlamaIndex, agentic AI frameworks, vector stores, tracing and logging tools, prompt management platforms, and evaluation frameworks
- Strong data engineering capabilities, including dataset creation and validation, ETL development, SQL schema design, and the definition and tracking of meaningful product and model metrics
- Solid understanding of ML fundamentals and experimentation, including metric design, error analysis, model selection, and performance tuning
- A strong security and governance mindset, with the ability to communicate clearly with both technical and non‑technical audiences, and a high level of ownership from discovery through production and iterative improvement
What the job involves
- As we continue to expand our business, we have an opportunity for a hands-on AI Engineer who is excited about turning real-world challenges into smart, scalable solutions
- You will work with the latest third‑party AI services, build streamlined workflows and craft high‑impact prompts that boost our internal tools, speed up developer productivity and elevate the customer experience
- You will work closely with Product, Operations, and Engineering teams to turn ideas into practical solutions and contribute to improvements across the platform
- Department: Engineering
- Reporting To: Director of AI Engineering
- You'll build and deliver production‑ready AI and Generative AI solutions using LLMs, RAG architectures, agents, and responsible AI practices
- Use AI coding assistants such as Cursor, GitHub Copilot, and Claude Code to accelerate development while maintaining ownership of outcomes and documenting best practices and repeatable patterns
- Manage cloud infrastructure and platform operations, including AWS, Kubernetes, CI/CD pipelines, Terraform, monitoring, performance optimisation, and cost control
- Design, develop, and maintain backend services in Python, and contribute to React, TypeScript, and PHP codebases when required
- Lead evaluation and iteration cycles, including defining and tracking offline and online metrics, running A/B tests, meeting latency and cost targets, implementing human‑in‑the‑loop validation, and ensuring robust observability
- Implement and maintain retrieval pipelines using embeddings, vector databases, hybrid search methods, and effective chunking strategies
- Collaborate closely with Product using a working‑backwards approach, producing technical designs, breaking down work, and delivering iteratively
- Improve internal AI development tooling, including shared libraries, SDKs, and reference implementations for RAG, tracing, prompt management, and evaluation
- Contribute to internal enablement and capability‑building activities across the organisation
- Partner with Security, Legal, and Data teams to define AI policies, review risks, and ensure privacy, PII protection, and regulatory compliance
- Mentor peers, conduct code reviews, and share knowledge to elevate engineering standards across the organisation
Application process
- Online interview with the Talent Partner and the Director of AI Engineering
- Technical interview with Director of AI Engineering, VP of Product Engineering, and VP of Product
Salary benchmarks
Our take
Reward Gateway was founded in 2006 as an employee engagement company. With reports suggesting that despite the majority of CEOs recognising that employee engagement is vital to their success, very few say they have a highly engaged company. Reward Gateway set out to bridge this so-called "engagement gap".
By engaging employees, Reward Gateway promises companies increased productivity, communication, and employee satisfaction - helping them to retain their most valued employees. It sets itself apart from traditional HR solutions by bringing employee benefits, discounts, perks, rewards, recognition, wellbeing and feedback into a single unified hub.
The company has acquired Xexec, MoveSpring and Fond, all providers of employee wellbeing and rewards software, to further bolster its offering and capabilities. In 2023, it was itself acquired by Edenred, a worldwide leader in employee benefits, presenting Reward Gateway with the chance to expand into new regions while the two companies enhance their already comprehensive range of solutions.
Steph
Company Specialist at Welcome to the Jungle
Insights
7% employee growth in 12 months
Company
Funding (2 rounds)
Jul 2015
$162.6m
GROWTH EQUITY VC
Dec 2010
$34.6m
GROWTH EQUITY VC
Total funding: $197.2m
Company benefits
- Life assurance
- Pension/401K
- Debt support programme & salary advances
- Bonus for referring a friend who we hire and have completed 3 months’ service
- Employee Share Plan
- Discounts to share with friends and family
- Family support - Baby Bonus, caregiver support, domestic violence protection programme, parent support loan, miscarriage and baby loss support, wedding bonus and up to 3 months paid leave to take care of your family
- Gender neutral parental leave for primary and secondary carers
- Up to 6 months unpaid leave after five years’ service
- Volunteer days plus a day of leave to Speak Up and be the change you want to see in the world
- Unlimited time off to give blood
- Trans & gender affirmation support
- Unlimited free books for your professional development and one fiction book per month to help you unwind
- Employee assistance programme
- Health benefits such as free eye tests, free flu jab, freedom from addiction, menopause support, stop smoking assistance programme and health cash plan
- Personal wellbeing allowance, personal wellbeing coach, run club, spa and gym discounts, plus cycle to work scheme
- Work from home bundles
- Flexible working
- Bring your dog to work, drinks and breakfast
Company HQ
Soho, London, UK
Leadership
Nick Burns
(AUKUS Zone Director)Advisory Board Member at Hybrid Legal and at Engage Works. Formerly CEO of Gallagher Benefit Services (UK).
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