Senior Platform Engineer in London

Location: Holborn, London

Office Policy: Hybrid: 3 days a week in office

At Omaze, we give our community in the UK and Germany the chance to win luxury homes and other life-changing prizes — all while raising money for the causes they love. Thanks to our Omaze Community, we’ve raised over £100 million for UK charities in just five years. That’s millions helping organisations like Age UK, the RSPCA, British Heart Foundation and Great Ormond Street Hospital Charity deliver life-saving work.

Omaze is building a business and culture committed to growth and creating significant social impact on a global scale.

Why You’ll Love Working at Omaze

• Growth: Omaze is one of the fastest-growing companies in the world.
• Impact: Join a team of world changers dedicated to creating a ripple effect of good.
• Pioneering: Be part of something no one has done before.
• Culture: We work hard, grow together, and spread joy along the way.

About The Job

As a Senior Platform Engineer at Omaze, you take genuine ownership of the infrastructure and reliability foundations that everything else depends on. You're experienced across AWS, particularly Lambda, API Gateway, DynamoDB and the serverless patterns that underpin our platform. You know how to build and maintain infrastructure that's secure, observable, cost-efficient at scale and globally distributed. You work in code - IaC isn't an afterthought for you, it's how you think. You bring the kind of judgement that comes from having run production systems under real pressure, and you apply that same rigour to the developer experience.

What You'll Be Doing

• Own the design, implementation, and evolution of Omaze's cloud infrastructure on AWS, Lambda, API Gateway, and surrounding services, written and maintained as code using CDK and / or Terraform.
• Build and maintain CI/CD pipelines in GitHub Actions that are fast, reliable, and give engineers confidence to ship frequently and safely.
• Drive observability across the platform via instrumentation, alerting, dashboards, and on-call tooling so the team can detect, diagnose, and resolve incidents quickly.
• Own security and compliance posture across the infrastructure: IAM, secrets management, network boundaries, and regulatory requirements, identifying risk early and remediating it properly.
• Identify and act on cost optimisation opportunities, tracking resource utilisation, rightsizing infrastructure, and making spend visible and understandable across engineering.
• Raise the baseline for developer experience by reducing toil, improving deployment workflows, and making the right way to do things the easy way.
• Hold a high bar in infrastructure code review by giving feedback that's direct, constructive, and focused on long-term maintainability and security.
• Use AI-assisted tooling as a natural part of your workflow and apply the same rigour and judgement to AI-generated infrastructure code as you would to anything hand-written.

About You

• Significant experience as a Platform, Infrastructure, or DevOps engineer, with a strong AWS background and hands-on serverless experience (Lambda, DynamoDB, API Gateway, event-driven architectures).
• Production-grade IaC experience with Terraform and/or AWS CDK. You write infrastructure the same way you write application code: tested, reviewed, and version controlled.
• Strong experience with CI/CD pipelines, particularly GitHub Actions, and a track record of improving deployment reliability and developer velocity.
• Deep familiarity with observability tooling and incident response practices. You've been on-call and know what good looks like.
• Solid understanding of cloud security principles: IAM, least privilege, secrets management, network security, and compliance requirements in regulated environments.
• Experience tracking and optimising cloud costs. You understand the levers and know how to make trade-offs without compromising reliability.
• Comfortable working closely with other engineering teams translating infrastructure complexity into clear patterns and guardrails teams can follow confidently.
• A clear communicator who can make the case for the platform as a product investment to both technical and non-technical audiences.

What’s In It For You

• Generous stock options scheme
• Private medical and dental insurance
• 9% employer pension contributions, when you contribute at least 2%
• A personal learning and development budget each year to use on training courses, conferences and professional memberships
• Personal equipment budget to work from home
• Enhanced family leave policies
• Life assurance of 4x your salary

Diversity statement

We actively seek out diversity of thought and experience to drive innovation. We welcome all backgrounds, identities, and perspectives and work hard to ensure that every Omaze employee can bring their authentic self to work at all times.