Senior Back End Engineer

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 Risk Tech
100® 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.

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.

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.

We're hiring a Staff Backend Engineer to join our engineering team in a high‑impact technical leadership role. You'll work on our most challenging technical problems, own parts of our platform’s architecture, and help shape the technical direction of our backend stack.

Our tech stack centers on Go microservices, with Temporal workflows, Mongo

DB and Elastic Search running on Kubernetes in GCP. You'll work with modern patterns including event‑driven architectures, gRPC and REST APIs, and comprehensive observability with Grafana Cloud.

You’ll take technical ownership of major domains within our platform - whether that’s our Investigations pipeline (web scraping, data provider integrations, LLM‑powered analysis) or our Core App systems (user journeys, features, and configuration). You'll be a technical authority, establishing patterns that others follow and driving initiatives that span multiple teams.

• Own the technical direction and architecture for parts of our platform
• Design and build complex backend services and systems that scale
• Drive technical decisions that affect multiple teams
• Establish patterns, standards, and best practices that others will follow
• Lead complex technical initiatives from design through implementation
• Identify and address systemic technical challenges across our backend
• Write exemplary Go code that sets the standard for quality and design
• Mentor engineers across the organization, raising the technical bar
• Balance technical excellence with pragmatic delivery
• Influence technology choices and architectural direction
• Collaborate with engineering leadership on technical strategy
• Build new systems and features while improving our existing architecture

• 10+ years of professional software engineering experience
• Deep expertise in Go, with mastery of concurrency, performance optimisation, and advanced patterns
• Proven track record of designing and owning large‑scale systems
• Strong experience with distributed systems, event‑driven architectures, or similar…