Java Engineer – Trading APIs & High-Performance (Hybrid)

Harrington Starr; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Job summary

Harrington Starr in London is seeking a Java Engineer to join a fintech's institutional trading tech team. You’ll help build high-performance trading APIs used by global markets, focusing on performance, reliability and resilience.

You'll work on asynchronous, event-driven systems, multithreaded architectures and external API integrations, with AWS-based cloud development and close collaboration with product and business stakeholders. Hybrid work, three days onsite.

Qualifications

• 5+ years of Java development experience.
• Strong Java and Spring/Spring Boot expertise.
• Experience with multithreading and concurrency.
• Experience with asynchronous messaging or streaming systems.
• Experience building external APIs and AWS or cloud environments.

Responsibilities

• Build and develop trading APIs used by institutional clients.
• Work with asynchronous, event-driven and messaging systems.
• Create resilient external APIs and integrations.
• Improve performance, reliability and automation across the platform.
• Collaborate with product and business stakeholders.
• Participate in cloud-based development, predominantly AWS.

Skills

Java

Spring Boot

Multithreading

Asynchronous Systems

External APIs

AWS

Job description

Harrington Starr in London is seeking a Java Engineer to join a fintech's institutional trading tech team. You’ll help build high-performance trading APIs used by global markets, focusing on performance, reliability and resilience.

You'll work on asynchronous, event-driven systems, multithreaded architectures and external API integrations, with AWS-based cloud development and close collaboration with product and business stakeholders. Hybrid work, three days onsite.