Senior / Lead Site Reliability Engineer in Watford

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View more categories View less categories Sector Engineering Role Senior Executive Contract Type Permanent Hours Full Time

At the heart of everything we do is our vision to change lives every day, and our mission to grow The National Lottery responsibly and champion its impact.

We are Allwyn UK, part of the Allwyn Entertainment Group - a multi-national lottery operator with a market-leading presence across the USA (Michigan and Illinois) and Europe, including Czech Republic, Austria, Greece, Cyprus and Italy.

While the main contribution of The National Lottery to society is through the funds to good causes, at Allwyn we put our purpose and values at the heart of everything we do.

Join us as we embark on a once-in-a-lifetime, largescale transformation journey by creating a National Lottery that delivers more money to good causes.

We'll talk a bit more about us further down the page, but for now - let’s talk about the role and who we’re looking for...

A bit about the role

At Allwyn, the Senior/Lead Site Reliability Engineer is responsible for technical leadership of reliability engineering across the digital estate, ensuring high availability, performance, and resilience of customer-facing systems during both normal operation and peak lottery events.

The role combines hands‑on engineering, incident leadership, and ownership of the SRE improvement backlog and reporting, working across platform, product, and operational teams.

• Objectives of the role
• Own reliability outcomes across services using SLOs, SLIs, and error budgets
• Improve availability, latency, and scalability across Instant-Win and Draw-based platforms
• Lead incident response and operational readiness, including peak jackpot events
• Drive automation and platform maturity, reducing manual operational effort
• Establish clear reporting on reliability, incidents, and service health trends
• Supporting with thought‑leadership and developing long‑term roadmap
• What you’ll be doing
• Reliability engineering & technical leadership
• Define and govern SLOs / SLIs / error budgets across critical services

• Lead reliability design reviews across

• Web & mobile platforms
• Player Identity & Protection systems
• CMS and Geolocation services
• Drive architecture improvements for resilience (failover, degradation, scaling patterns)
• Production operations & incident leadership
• Act as incident commander for major incidents and high‑severity events

• Lead 1-in-4 on‑call rotation, covering

• Out‑of‑hours incident diagnosis
• Peak jackpot proactive monitoring

• Own end‑to‑end incident lifecycle

• Detection - triage - resolution - post‑incident review
• Ensure blameless post‑mortems with clear remediation ownership
• Observability & service insight

• Define and evolve observability strategy using

• Splunk (log analytics)
• Cloud Watch (AWS telemetry)
• Grafana (metrics visualisation)
• Quantum Metric (user behaviour insight)

• Standardise

• Alerting quality and signal‑to‑noise ratio
• Dashboards aligned to SLOs and customer impact
• Drive correlation between technical signals and user experience
• Automation & platform engineering
• Lead automation of operational processes using Terraform and scripting
• Improve deployment and release safety (CI/CD, progressive delivery patterns)
• Key contributor to transition strategy for ECS - EKS (Kubernetes adoption)
• Reduce operational toil through tooling, self‑healing, observability and platform improvements
• Empower Level‑1 operational teams with safe, controlled access to the tools they need to operate autonomously
• Capacity & performance engineering

• Own capacity planning for

• High‑concurrency draw events
• Traffic spikes during jackpots

• Lead performance optimisation

• Latency reduction
• Throughput scaling
• Cost efficiency (AWS utilisation and associated log costs, observability license consumption)
• Backlog ownership & reporting

• Own and prioritise the SRE backlog, balancing

• Reliability improvements
• Technical debt
• Automation opportunities to reduce/offload toil

• Produce structured reporting covering

• SLO performance
• Incident trends and MTTR
• Platform health and risk areas
• Provide clear updates to engineering leadership and business stakeholders
• Collaboration & culture
• Embed SRE practices across engineering teams

• Mentor engineers and SREs on

• Reliability engineering
• Observability
• Incident management
• Promote a culture of automation, measurement, and continuous improvement
• Supporting with thought‑leadership and developing long‑term SRE roadmap for Digital Operations
• What experience we’re looking for
• Technical
• Strong experience in cloud environments, ideally AWS (ECS, with exposure or experience in EKS/Kubernetes)

• Hands‑on experience with

• Terraform (Infrastructure as Code)
• Observability stacks (Splunk, Cloud Watch, Grafana)
• Strong programming skills (Python, Go, or similar)
• SRE practices

• Proven experience implementing

• SLOs, SLIs, error budgets
• Incident management frameworks
• Observability strategies
• Strong experience in distributed systems troubleshooting
• Operational
• Experience in on‑call production environments
• Demonstrated leadership during high‑severity incidents

Desirable Experience

• Experience migrating container platforms (ECS - EKS/Kubernetes)
• Experience supporting high‑scale consumer platforms
• Familiarity with real‑time analytics / customer experience tooling (e. g., Quantum Metric)
• Experience in regulated or high‑availability environments

About us

At Allwyn, we are dedicated to changing lives and growing the National Lottery responsibly, championing its positive impact on people, places, and the planet.

• Innovation - We pride ourselves on it!

We're constantly looking for new ways to excite our customers, bringing new products to market to enjoy which is all supported by our responsible play values and making them accessible to all.

• Giving back - Did you know that playing the lottery generates around £30m a week for charities and good causes in the UK?

Our aim is to have doubled this number by the end of the first 10‑year license.

• Sustainability - Our aim is to become a net zero national lottery.

We have 2030 targets to decarbonise our operations and energy.

We've already transitioned to renewable energy providers, made our London and Watford offices zero gas, and ensured our fleet consists of low‑emission vehicles.

In addition, we're working with our value chain partners to develop a net zero target date.

• Empowering every voice - We believe in creating a culture where everyone feels they belong, can be themselves, has access to opportunities and can thrive for the benefit of good causes.

Our diverse teams are working hard to make all parts of The National Lottery inclusive - whether people play a game in a store or online, because when everyone can play, everyone wins..

An inclusive reward offering with wellbeing at the centre

Benefits

• Company Bonus Scheme
• Matched pension contributions up to 8.5%
• 26 days annual leave + 2 Life Days (and bank holidays)
• Single Private Health Cover
• Complimentary Private Medical
• Income Protection
• Flexible Benefits - EV Scheme, Money Coach, Will Writing, Mortgage Advice, Dental and Eye Care Schemes.
• Enhanced Family Leave (Maternity, Paternity, Adoption)
• Wellness Allowance £500
• Employee Assistance Programme
• Discounted Health Assessments
• Volunteering Days
• Matched Funding

We are a Disability Confident Leader which means we've taken proactive steps to ensure our workplace is accessible and inclusive for disabled and neurodivergent colleagues and candidates.

As part of this we offer an interview to disabled applicants who meet the essential requirements of the job.

If you need any assistance or adjustments to this job description or in the application process, please contact a member of the talent team at and we’ll be happy to help.

• Company
• Our vision is to grow the National Lottery responsibly, making it bigger
• , better and safer for all

, with more to good causes.

Bigger because we will significantly increase Good Causes contributions by the end of the Fourth Licence through responsible growth of people playing.

Better because we will modernise technology and operations, refresh games and support shops while improving the use of data and digital.

Safer because participant protection underpins everything we do.

What is unique about us?

Our preparations to transform the National Lottery will be a once-in-a-lifetime type of project in the lottery industry, anywhere in the world.

Join our journey to create a new experience for the National Lottery and help us to power change for the greater good.

Our approach

In Allwyn, the National Lottery will have an operator that has social value at its heart.

We will raise more funding for Good Causes, while running our own business in an environmentally and socially responsible way.

That’s why we have committed to an ambitious Social Value framework, which is woven into the way we do business.

We believe that lotteries must serve everyone across society, not just those who play.

So whether as an employee, a supplier, a retailer or any of the stakeholders that we interact with, we will be powering good across the UK.

Our goal is to create one of the UK’s most inclusive organisations – where people can bring the best of themselves, to do their best work, every day, for the benefit of good causes.

We are working to make the National Lottery truly accessible in a safe way, whether as a player, a retailer or an employee.

We are proud to have been a partner with Purple since 2021 to support our work to embed accessibility into everything we do.

• Purple has carried out an accessibility audit on our office in Watford, is working with us
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