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W3Global

Lead Backend Developer

On site

Bristol, United kingdom

Senior

Freelance

10-12-2025

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Skills

Problem Solving Java Go SQL Penetration Testing DevOps Strategic thinking Architecture Databases Agile

Job Specifications

Job Role- Lead Backend Developer

Work Location - Bristol, UK

Duration- 6 Months Contract

Experience: 15 Years

Job Description-

About the team

Our team is accountable for security within the mobile channel. We provide a suite of mobile security components, that provides an all-round security posture in mobile apps including associated services (penetration testing, obfuscation, consultancy etc.).

Our mission is to build a scalable, adaptable, and proactive approach to securing customer's mobile apps, enabling mobile engineers across the bank to operate with confidence and agility in an ever-evolving threat landscape.

We're passionate about our shared passion for delivering new features for customers across our brands in the mobile space.

What we need from you / essential skills & experience:

Extensive knowledge of writing secure scalable enterprise-grade Go applications
Experience of RESTAPIs, containerisation technologies, micro-services architecture
Ability to work collaboratively within a team as well as independently
Excellent analytical, problem solving, and strategic thinking skills
In depth knowledge of best coding practices, code management, agile development practices and continuous delivery
Understand how to performance optimise and fine tune backend applications to meet demanding NFRs

Desirable Knowledge & Experience

Experience of JAVA development
Experience with cryptography frameworks in go and JAVA
Experience with SQL databases
Experience and/or Interest in application security and/or mobile app security.
Experience with cloud environments including DevOps functions and pipelines

Skill Matrix

Senior Lead Java Backend
RESTAPIs
Containerisation technologies
Micro-services architecture
JAVA development
Cryptography frameworks in go and JAVA
SQL databases
cloud environments including DevOps functions and pipelines
Application security and/or mobile app security
Api developers with crypto experience working in mobility spa

About the Company

W3Global is a leading provider of end-to-end consulting services, empowering businesses to achieve their strategic goals and optimize their operations. With over 15 years of experience, we have a proven track record of delivering innovative and effective solutions across a wide range of industries. Our Mission At W3Global, we are committed to helping businesses of all sizes achieve their full potential. We believe that by combining our deep industry expertise with our innovative approach, we can deliver exceptional results... Know more