Principal Software Engineer
Summary
Hands-on Principal Software Engineer at a financial services firm, designing and building end-to-end digital customer journeys, Java/Spring Boot microservices and secure AWS solutions, while leading a small team of engineers. Hybrid role based in London (six days onsite per month), paying £75,000–£95,000 plus benefits.
Salary: £75,000 - 95,000 per year
Requirements:- Significant software engineering experience and a track record of delivering large-scale enterprise web applications in financial services.
- Deep experience with Java, Spring Boot and microservices, plus experience with JavaScript (React.js ideally), SQL, MongoDB, PostgreSQL, DevOps, CI/CD, test automation and Infrastructure as Code.
- Strong AWS experience, including designing and deploying secure, resilient production workloads.
- Experience designing and delivering complete digital customer journeys, including integrations, data, exception handling and operational support.
- Experience leading software development teams.
- Experience with APIs, test-driven development, automated test frameworks, code repositories, bug-tracking tools and wikis.
- Ability to translate business requirements into technical solutions and clearly explain decisions to stakeholders.
- Experience with AWS migrations, data engineering or data architecture is useful.
- Design and deliver end-to-end, full-stack digital journeys covering customer experience, APIs, integrations, data, security and production support.
- Build and improve Java and Spring Boot microservices, focusing on resilience, scalability and performance.
- Design secure, reliable AWS solutions and make informed decisions about architecture and technical trade-offs.
- Write, test and release code, using automation across build, test and deployment.
- Guide a small team of engineers and collaborate with product, business and architecture stakeholders.
- Improve existing systems through practical, measured changes rather than relying on wholesale redesign.
- AWS
- CI/CD
- DevOps
- Support
- Java
- JavaScript
- MongoDB
- PostgreSQL
- React
- SQL
- Security
- Spring
- Spring Boot
- Web
- microservices
- Cloud
More:
We are recruiting a Principal Software Engineer for a financial services organisation investing in its digital products and bringing more engineering in-house. This is a hands-on role focused on designing complex customer-facing digital services, writing production code and leading technical decisions across a team. The position is based in London, with hybrid working and six days onsite per month. The package is £75,000–£95,000, plus a 10% pension contribution, 10% cash allowance, bonus and benefits package.
last updated 40 week of 2026