Java Developer (Outside IR35 Contract)

JR United Kingdom; Northampton; Hybrid; GBP 45,000 - 70,000; Full time

Job summary

A fast-growing fintech scale-up is seeking a Java Developer for a 6-month Outside IR35 contract in Northampton. The role involves architecting a high-availability SaaS platform and requires strong Java and PostgreSQL skills, alongside a collaborative team environment. Ideal candidates should also be comfortable with AWS and have a background in fintech or SaaS platforms.

Qualifications

• Strong Java engineering experience, ideally with Micronaut or Spring Boot.
• Solid experience with PostgreSQL, including query optimisation.
• Familiarity with cloud-native development on AWS.

Responsibilities

• Develop and maintain scalable backend services using Java.
• Architect and implement service-oriented and event-driven systems.
• Optimise and manage PostgreSQL databases.

Skills

Java

PostgreSQL

AWS

React

Job description

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Java Developer (Outside IR35 Contract), Northampton

Client: Bonhill Partners

Location: Northampton, United Kingdom

Job Category: Other

EU work permit required: Yes

Job Views:

4

Posted:

04.06.2025

Expiry Date:

19.07.2025

Job Description:

Java Developer (Contract) – Fintech Scale-Up | Outside IR35

Location: Northampton (Hybrid – 3 days in office)

Duration: 6 months

About the Company

We’re supporting a fast-growing Fintech scale-up building a next-generation digital cash savings platform. Their mission is to help people and institutions make the most of their money by simplifying access to high-performing savings products.

The Role

We’re looking for a Java Developer to join their growing platform team on a 6-month Outside IR35 contract. This is a backend-focused role where you'll contribute to the architecture and build of a high-availability, API-driven SaaS platform.

You’ll work in a collaborative, fast-paced environment, helping them scale to meet growing demand from financial institutions and end-users alike.

Key Responsibilities

• Develop and maintain scalable backend services using Java
• Architect and implement service-oriented and event-driven systems
• Optimise and manage PostgreSQL databases
• Contribute to light React frontend work when needed
• Build and deploy using AWS
• Uphold high standards for engineering quality, performance, and reliability

Required Experience

• Strong Java engineering experience, ideally with Micronaut or Spring Boot
• Solid experience with PostgreSQL, including query optimisation
• Familiarity with cloud-native development, especially on AWS
• Exposure to React or willingness to support minor frontend tasks
• Background in fintech or SaaS platforms (a plus)