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Haystack

Java Developer - FTC

Hybrid

London, United kingdom

Freelance

25-03-2026

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Skills

Java Kotlin DevOps Agile methodologies AWS Agile Spring Spring Boot Terraform Infrastructure as Code Microservices

Job Specifications

Java Developer - 9 Month FTC | £80,000 - £85,000

We're working with a sophisticated financial services firm known for its high-performance technology culture on this exciting opportunity. We are looking for a heavyweight engineer to join a high-calibre team of 50, providing critical maternity cover while driving forward modern software solutions in a fast-paced Agile environment.

This is a high-impact role where you will leverage a modern stack including Java, Kotlin, and Spring Boot to build robust financial systems. Working within a tight-knit squad of four software engineers, you'll tackle complex problems, optimize performance, and ensure the reliability of business-critical applications during a pivotal 9-month period.

The Role

Design, develop, and maintain high-performance software applications using Java and Kotlin to meet complex business requirements.
Lead the integration of systems within an Agile framework, collaborating closely with cross-functional teams to deliver seamless features.
Drive technical excellence through rigorous testing, debugging, and performance tuning to enhance system reliability.
Provide expert technical support and troubleshooting within the technology department, ensuring minimal downtime for critical financial services.
Document architectural designs and updates to ensure long-term maintainability and compliance with strict industry regulatory standards.

What You'll Need

Strong commercial experience with Java and Kotlin development in an enterprise or financial environment.
Deep expertise in the Spring Boot ecosystem for building microservices and scalable backend systems.
Hands-on experience or familiarity with Infrastructure as Code (IaC) tools like Terraform and cloud environments such as AWS.
A solid understanding of Agile methodologies and a proactive approach to continuous improvement and DevOps practices.
Proven ability to work collaboratively in a fast-moving, regulated financial sector environment.

What's On Offer

Competitive salary of £80,000 - £85,000 plus a performance-linked bonus.
Market-leading pension scheme with up to 10% employer matching contributions.
Comprehensive Private Medical Insurance covering both you and your family.
Flexible hybrid working model with 3 days a week in a prime Central London office.

Apply via Haystack today!

About the Company

Discover Haystack - the UK's fastest growing tech hiring marketplace. Driven by our award-winning mobile app and web platform, Haystack connects active and passive tech talent directly with hiring managers and talent acquisition teams. We're trusted by over 150,000+ UK-based techies, working in Software Engineering, Data, Design, DevOps, Cloud, Tech Management, Testing, Product & Delivery, Architecture and more. 100s of employers from startups and scale-ups like Atom Bank, DuckDuckGo and Football Radar to established e... Know more