Contract Application Developer (Java, Typescript & Endur)

X4 Technology; London; Hybrid; GBP 125,000 - 150,000; Full time

Job summary

A global energy trading company is looking for a skilled Application Developer for a hybrid role in London. You will work within an agile team focusing on developing solutions that support renewable energy trading and asset management. The position offers a competitive day rate and the potential for contract extension.

Qualifications

• Proven experience in Java development (Spring Boot, REST APIs).
• Solid front-end experience with TypeScript and frameworks (e.g., Angular, React).
• Hands-on experience with Endur and JVS / AVS scripting.

Responsibilities

• Develop, enhance and maintain applications using Java and TypeScript.
• Collaborate in an agile environment with product owners and developers.
• Implement APIs and services for internal and external integrations.

Skills

Java

TypeScript

API Development

Scripting

Tools

Endur

SQL Server

Oracle

Git

Jenkins

Job description

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Head of Change & Transformation at X4 Technology

Role: Application Developer

Industry: Energy trading

Day Rate: £500-600/d inside IR35

Location: London (hybrid)

Contract: 6 months (strong extension potential)

X4 Technology are partnered with a global energy trading company looking for a skilled Application Developer to join their team on a contract basis.

In this role, you would join the agile IT team, supporting critical applications used in energy trading and asset management operations. You’d be working in a dynamic environment, contributing to the development and integration of solutions that support renewable energy trading, financial analytics, and risk management.

Responsibilities of the Contract Application Developer (Java, Typescript, Endur)

• Develop, enhance and maintain applications using Java and TypeScript.
• Customise and support Endur (Openlink), including JVS and AVS scripting.
• Collaborate with product owners, business analysts, and other developers in an agile setting.
• Implement APIs and services for internal and external data integrations.
• Troubleshoot production issues and provide timely support and resolution.
• Participate in code reviews, design sessions, and continuous improvement initiatives.
• Ensure software quality through unit testing, automation, and documentation.

Requirements of the Contract Application Developer (Java, Typescript, Endur):

• Proven experience in Java development (Spring Boot, REST APIs).
• Solid front-end experience with TypeScript and modern frameworks (e.g., Angular or React).
• Hands-on experience with Endur (Openlink), including JVS and AVS scripting.
• Familiarity with database technologies such as SQL Server or Oracle.
• Experience with CI/CD tools and version control (e.g., Git, Jenkins).

The contract is for an initial 6 months with strong extension potential. The rate is £500-600/d inside IR35.

Interviews are taking place from week commencing 26th May, so if you're an Application Developer with energy trading experience, please apply online for immediate consideration.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Contract

Job function

• Job function

  Information Technology

• Industries

  Oil and Gas

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