Senior Platform Engineer in London

About Us

Every business needs to know who they’re really working with whether it’s suppliers, investors, partners, or third parties. At Xapien, we’re reinventing how organisations do that, combining speed, scale and accuracy with cutting‑edge AI.

Since 2018, we’ve grown from a deep‑tech startup to a global player in AI‑driven due diligence and risk intelligence. 2024 was a landmark year as we closed a $10M Series A, earned recognition in the Chartis RiskTech100® and Everest Group’s Leading 50™, and expanded our products, markets and customer base.

2025 was even bigger: With new regulations, rising compliance pressure and growing reputation risks, organisations everywhere are demanding smarter, faster ways to work and they’re turning to us. Customers worldwide from global law firms and private banks to universities and nonprofits rely on Xapien to turn days of manual research into trusted insights, delivered in minutes.

Our momentum so far

Customers in a diverse range of industries, with particular growth in wealth management, financial services and supply chain onboarding.

Demand accelerating beyond our UK headquarters, across multiple continents with new customers in the Middle East, Asia, and Oceania.

Why this is an exciting time to join

This isn’t just another job role; it’s an opportunity to shape the future of the due diligence industry with a market‑leading product trusted by global organisations. Whether you’re in marketing, communications, sales, or finance, you’ll play a critical role in driving growth, building credibility, and defining how we connect our product to a rapidly evolving market.

We’re scaling fast with more customers, more releases, and bigger regulatory and market challenges. Expectations are rising, due diligence now means real‑time insight, delivered efficiently and with impact. You won’t just be executing campaigns, closing deals, or managing numbers, you’ll be influencing strategy, optimising processes, and helping position a brand that’s setting the new standard for trust and transparency.

For people who love learning, innovating, and making an impact that matters now is the moment to be a part of Xapien.

The role

We are looking for an experienced Senior Infrastructure Engineer to help lead the design, implementation, and maintenance of our cloud infrastructure. Working directly with our Head of Platform Engineering, you will play a key role in shaping the technical future of our product. This position involves a mix of hands‑on technical expertise and strategic planning, with a focus on optimizing our systems for scalability, reliability, and maintainability. We are seeking someone with a strong background in building and deploying scalable cloud‑native applications on AWS, experience with microservices architecture, and a track record of automating and improving infrastructure processes to improve overall developer experience.

Here’s what you will be responsible for

· Designing, building, and maintaining scalable, reliable, and secure cloud infrastructure on AWS using technologies including EC2, ECS, Lambda, SQS, DynamoDB, RDS, Cognito, S3, and SNS.

· Developing and deploying cloud‑native applications following microservice design patterns.

· Implementing infrastructure as code using tools like Terraform or CloudFormation to automate deployment and scaling processes.

· Automating deployment pipelines and CI/CD processes to ensure rapid and reliable delivery of software.

· Monitoring system performance, troubleshooting issues, and optimizing infrastructure for performance and cost‑efficiency.

· Collaborating with the development team to ensure seamless integration and deployment of applications.

· Ensuring best practices in security, compliance, and data protection are followed across all infrastructure components.

· Mentoring and providing guidance to junior engineers, promoting a culture of continuous learning and improvement.

Your skills & experience

Must‑haves to be successful in this role

· Strong experience in Go or C# programming languages (ideally both).

· Extensive experience in building and deploying scalable cloud‑native applications on AWS using technologies including EC2, ECS, Lambda, SQS, DynamoDB, RDS, Cognito, S3, and SNS.

· Experience architecting cloud‑native applications following microservice design patterns.

· Proficiency with infrastructure as code tools like Terraform or CloudFormation.

· Deep understanding of AWS services, cloud architecture, and best practices.

· Experience with containerization technologies like Docker and orchestration tools like Kubernetes or ECS.

· Familiarity with CI/CD pipelines and tools like Github Actions, GitLab CI, or CircleCI.

· Strong understanding of networking concepts, security principles, and system monitoring.

· Excellent problem‑solving skills and the ability to break down complex problems into manageable tasks.

· Track record of designing and implementing scalable, reliable distributed, heterogeneous systems.

· Deep knowledge of cloud architecture and development best practices, design principles, and patterns.

· Experience working with everything from relational databases through to a multitude of NoSQL stores.

· Experience working with technologies, including message queues, event streams, authentication, caching, API hosting, containers, lambdas, FaaS patterns, orchestration / workflow engines and search engines.

· Strong communication skills—our ideas are nothing if we cannot communicate them.

· Analytical mindset with the ability to articulate your thinking.

· Ability to work autonomously and within a team, engaging flexibly to develop solutions.

Nobody can do everything but here’s a few related things we’re interested in

· Experience working with multi‑region cloud deployments, designing for availability, resilience and maintainability.

· Security best practices and compliance standards in cloud environments.

· We are primarily on AWS but experience working with GCP and Azure would be helpful.

· Experience with Elastic Cloud, MongoDB, and Temporal orchestration engine.

· Experience deploying machine learning systems and particularly LLMs.

· Familiarity with Elastic Observability or equivalent observability platforms.

· Good understanding of core DevOps concepts (containers, CICD etc).

Here’s our promise to you:

• We are going to work with you - to build a rewarding and fulfilling career with the opportunities, challenges and resources you need to do you your best work.

• We succeed together- you will own a meaningful part of the business through our employee shares & equity programme.

• Private health insurance to keep you in tip‑top condition.

• Life Insurance – let's hope nobody ever needs this!

• Unlimited holidays – yes, it really is uncapped – take the time you need, when you need it.

• Everyone is learning, developing and challenging themselves so we have a £1k professional development fund per year if you want to learn new skills, even new things outside of work.

• Most importantly of all, we will work with you, to help you realise your fullest potential, always.

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