Backend Engineer

Caplia Technologies Ltd.; United Kingdom; Hybrid; GBP 60,000 - 90,000; Full time

Job summary

Caplia Technologies Ltd. is seeking a Backend Engineer to own the backbone of the platform in a hybrid UK role. You will design and run production backend systems, APIs, and data pipelines to scale securely as Caplia connects capital workflows for multiple customers.

You’ll work in a small, fast team, prioritizing security, reliability and performance, with ownership of critical components from day one.

Qualifications

• Production backend systems design and operation experience.
• Strong skills in API design, databases and cloud infrastructure.
• Security, reliability and scale should be considered from the start.
• Ownership mindset in a small, fast team.

Responsibilities

• Platform APIs: the APIs behind the product and integrations shipped.
• Connectivity: CRMs, data rooms and customer agents via REST and MCP.
• Data and scale: pipelines, performance, reliability as volume grows.
• Security at every layer: encryption, access control and auditability.

Skills

Backend design

API design

Databases

Cloud infrastructure

Job description

Backend Engineer Own the backbone of the platform.

Own the systems underneath Caplia: our APIs, MCP and CRM connectivity, data pipelines and the infrastructure that lets the platform scale securely across thousands of companies.

UK Full-time Hybrid

Why this role matters

Caplia sits between companies raising capital and the organisations backing them, and it plugs into the tools they already use. You'll build the layer that makes that connection fast, reliable and secure.

What you'll own

• 01 Platform APIs The APIs behind the product and every integration we ship.
• 02 Connectivity CRMs, data rooms and customers' own agents, over REST and MCP.
• 03 Data and scale Pipelines, performance and reliability as volume grows.
• 04 Security at every layer Encryption, access control and auditability built in from day one.

What you'll bring

• You've designed and run production backend systems
• Strong in API design, databases and cloud infrastructure
• You think about security, reliability and scale early
• Comfort with ownership in a small, fast team

Nice to have

• Experience building integrations or developer platforms
• Exposure to MCP or agent tooling

How we work

• Structure over fragmentation. Clarity over noise. Evidence over instinct. Speed with care.
• Caplia is private intelligence for the early-stage ecosystem. Accelerators, funds, angels, early-stage banks, startup awards and founders use the Caplia platform, and Phronel, the private AI agent behind it, to manage company discovery, evaluation and support.