Senior Backend Engineer - Commercial Banking

United Fintech Limited; Brighton; On-site; GBP 70,000 - 90,000; Full time

Job summary

A financial technology company is looking for a Senior Backend Engineer to join their London team. In this role, you will architect and develop scalable backend services, contribute to CI/CD pipelines, and mentor junior engineers. Ideal candidates should have over 5 years of experience in software engineering, proficiency in Java and Kotlin, and a holistic approach to technical challenges. The position offers an exciting opportunity to work at the forefront of commercial banking technology.

Qualifications

• 5+ years of experience in software engineering with proficiency in multiple technology stacks.
• Ability to collaborate with teams to evolve system architecture.
• Strong problem-solving skills with a focus on automated testing.

Responsibilities

• Architect solutions integrating across the technical ecosystem.
• Mentor junior engineers and drive continuous technical excellence.
• Design scalable APIs and ensure the platform remains best in class.

Skills

Java

Kotlin

Spring Boot

AI tools

React/js

Python scripting

SQL

Cloud deployment (Azure)

Event-driven architectures

CI/CD pipelines

Job description

United Fintech is building a global platform that connects financial institutions with modern, scalable technology solutions. Through acquisitions and partnerships, we bring together market‑leading fintech products that serve banks, asset managers, and financial institutions worldwide.

Based in London, Trade Ledger is an integral part of the United Fintech platform, transforming the financial services industry with our cutting‑edge lending platform. To strengthen this area, we are now seeking a Senior Backend Engineer – to join our growing team in London.

We are a small, highly‑collaborative team and every one of us matters. If you join us, you will experience an environment where your work is seen and appreciated by everyone. You will get to work on the exciting new product developments we are planning alongside the rest of the team – including leveraging emerging AI capabilities.

If you are motivated by the intersection of banking operations, technology, and client delivery – and you are ready to take ownership of product evolution in a truly global context – then keep reading, you might be who we are looking for.

The Role

As Senior Engineer, you will take a leading role in the ongoing development and implementation of our commercial banking solutions. This is a senior, hands‑on position where you will contribute to both the business and technical dimensions of our platform, ensuring that our offering remains best in class.

Key Responsibilities Include

• Architect holistic solutions that seamlessly integrate across our entire technical ecosystem
• Design, develop, and maintain scalable backend services using Java, Kotlin, and Spring Boot
• Contribute to CI/CD pipelines, automated testing and observability improvements
• Mentor junior engineers and help foster a culture of continuous technical excellence
• Translate business requirements into technical solutions with exceptional clarity
• Design elegant, scalable APIs and system architectures
• Apply deep technical knowledge across multiple domains and technology stacks
• Make architectural decisions that balance immediate needs with long‑term vision
• Leverage AI to solve complex technical challenges more efficiently

Candidate Profile

We are looking for an experienced product professional who combines deep engineering knowledge with a practical and collaborative mindset. You are comfortable moving between strategic thinking and hands‑on execution – someone who thrives at the intersection of business, technology, and delivery.

You Will Bring

• 5+ years of experience in software engineering with demonstrated ability to adapt across different technology stacks
• Holistic systems‑thinking approach to technical challenges
• Ability to collaborate with front end engineers to review code, features and evolve system architecture and engineering practices
• Strong foundation in software architecture principles
• Experience using AI tools as collaborative partners in development
• Proficiency in Java/Spring ecosystem, with the ability to quickly adapt to new frameworks
• React / js development experience
• Proficiency in Python scripting and common frameworks
• Expertise in designing and implementing robust, scalable distributed systems
• Deep understanding of API design principles and be able to continuously research, evaluate, and implement new technologies to improve the platform
• Experience with event‑driven architectures and message brokers (particularly Kafka)
• Strong knowledge of containerization, orchestration, and cloud deployment (Azure preferred)
• Proven ability to balance technical debt against delivery priorities
• Strong testing mindset with experience in automated testing approaches
• Proficiency in SQL and database design (PostgreSQL experience preferred)
• Excellent problem‑solving skills with the ability to navigate ambiguity

Working at United Fintech London

At United Fintech London, you will work in an international and collaborative environment that values initiative, curiosity, and attention to detail. You will collaborate closely with experienced colleagues and partners, gaining exposure to global banking operations and contributing directly to the future of commercial banking technology.

We value independent thinking and flexibility – and support you in achieving your goals while shaping solutions that matter to the global financial community.

To Apply

Please submit your CV and a short statement outlining what excites you about working in trade finance product management.

About United Fintech

Founded in 2020 and backed by the industry, United Fintech is a Digital Transformation Platform where global Financial Institutions and cutting‑edge technology providers come together to unleash their full potential and enable the future of finance. United Fintech remains on the frontier of innovation by acquiring engineering‑led fintechs within Capital Markets, Wholesale Banking, and Wealth Management under a central umbrella. In just over four years, the company has acquired six fintechs. In 2024, United Fintech received strategic investments from Barclays, BNP Paribas, Citi, Danske Bank and Standard Chartered.