Backend Engineer - Capital Markets SaaS

EC1 Partners; Greater London; On-site; GBP 85,000 - 110,000; Full time

Job summary

EC1 Partners is building backend services for a capital markets SaaS platform used by financial institutions to manage trading, post-trade, and operational workflows. You will work on scalable, production-grade systems at the core of institutional market infrastructure.

You will design and develop backend services and APIs, ensuring high availability and performance while collaborating across product and frontend teams.

Qualifications

• Backend experience with Java, Kotlin or similar.
• Experience in financial services or capital markets.
• API and database design experience.
• Experience working on production systems.
• Understanding of distributed systems.

Responsibilities

• Design and develop backend services and APIs.
• Support scalable, high-availability systems.
• Collaborate with product and frontend teams.
• Improve system performance and resilience.
• Contribute to technical design discussions.

Skills

Java/Kotlin backend

API design

Database design

Distributed systems

Production systems

Job description

Role Overview

This role focuses on building backend services for a capital markets SaaS platform used by financial institutions to manage trading, post-trade, and operational workflows. You’ll work on scalable, production-grade systems that sit at the core of institutional market infrastructure.

Key Responsibilities

• Design and develop backend services and APIs

• Support scalable, high-availability systems

• Collaborate with product and frontend teams

• Improve system performance and resilience

• Contribute to technical design discussions

Required Experience

• Backend engineering experience (Java, Kotlin, or similar)

• Financial services or capital markets exposure

• API and database design experience

• Experience working on production systems

• Understanding of distributed systems

Nice to Have

• Post-trade or middle-office system exposure

• Cloud-native development experience

• Microservices architecture

Why Join

• Core capital markets technology

• Product-led engineering environment

• Strong long‑term platform roadmap