Principal Software Engineer – Unified Client Experience (UCX)
Bristol, Hybrid – 2 to 3 days - Full-time, Permanent
Competitve Base + Up to 19% Pension Contribution + Performance Bonus
Are you an expert frontend/full-stack architect who loves solving complex user-journey problems? Do you want to shape the digital future of the UK’s leading investment platform?
We are looking for a Principal Software Engineer to lead our Unified Client Experience (UCX) engineering squad. In this role, you will champion the technical vision, architecture, and delivery of a seamless, modern digital experience that unifies onboarding, investing, and wealth management across web and mobile platforms.
The Mission
As a Principal Engineer in the UCX space, you will bridge the gap between complex backend systems and beautiful, intuitive user interfaces. You will drive frontend modernization, establish engineering best practices, and mentor a talented team of engineers to ship high-performance, secure software in a regulated environment.
Technical Toolkit & Core Skills
- Cloud & Infrastructure: Cloud-native architecture experience using AWS, Docker, and Kubernetes.
- DevOps & CI/CD: Building and maintaining robust automation pipelines (e.g., GitHub Actions, Harness).
- Testing & Quality: Strict adherence to TDD/BDD using tools like Jest, Cypress, or Appium.
- Observability: Implementing system telemetry and dashboards using Prometheus and Grafana to monitor live service health.
- Data Tier: Exposure to enterprise data environments (e.g., Oracle, Sybase, or DocumentDB).
Experience & Qualifications
We are looking for an engineering leader who brings:
- 8+ years of professional software engineering experience, with a proven track record of shipping complex, customer-facing digital products.
- Fintech or Regulated Environment Background: Strong understanding of building highly secure, compliant, and accessible applications (Banking, Wealth Management, or large-scale SaaS).
- Technical Leadership: Proven ability to architect frontends from scratch, conduct rigorous code reviews, and scale engineering standards across multiple squads.
- Agile Mindset: Deep familiarity with Scrum/Kanban frameworks, continuous delivery, and rapid feedback loops.
We do have other roles on the same project at varying levels, so please get in touch
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Principal Software Engineer - UCX employer: Simon James IT Ltd
As a leading player in the insurance sector, our company offers an exceptional work environment that fosters innovation and collaboration. With a strong focus on employee growth, we provide extensive training and mentorship opportunities, particularly for roles like the QE Architect, ensuring you can thrive in your career while contributing to transformative projects. Located in York, our hybrid working model promotes a healthy work-life balance, making it an ideal place for professionals seeking meaningful and rewarding employment.
