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# Principal Software Engineer - Wealth Technology

- **Company:** Schroders
- **Location:** London, United Kingdom
- **Experience:** Expert
- **Salary:** £75,447
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), User Authentication, Automation of Tests, Data Integration, Distributed Systems, Python (Programming Language), Systems Development Life Cycle, Software Engineering, SQL Databases, Azure Data Factory, Snowflake, Fastapi, Enterprise Integration, Api Design, Data Pipelines
- **Published:** November 11, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5961482293

## About the Role

We are looking for an experienced Principal Full-Stack Software Engineer to design, build and operate production-grade capabilities across APIs, data products, enterprise integrations and tools used by agents. This is a senior individual-contributor role for an engineer who can take complex problems from first idea through design, implementation, release and ongoing support., * Substantial hands-on software engineering experience and a strong record of delivering production systems across the full development lifecycle.

 * Deep Python engineering experience, including production services and APIs built with FastAPI or a comparable framework, plus the ability to work across user-facing components where required.
 * Strong understanding of API design, distributed systems, enterprise integration, authentication and authorisation, event-driven and batch patterns, testing, deployment and observability.
 * Experience creating data products and robust data pipelines using technologies such as Snowflake, SQL, dbt, Azure Data Factory or comparable cloud data tooling, including data modelling, quality and lineage.
 * Experience building tool-using applications or agent capabilities, including reliable tool interfaces, structured inputs and outputs, permissions, evaluation, failure handling and operational controls.
 * Principal-level judgement: able to shape technical direction, simplify complex problems, influence across teams, mentor engineers and balance pace with security, resilience, maintainability and regulatory control.

What you'll be like

 * A hands-on principal engineer who leads through technical credibility, working software and clear engineering judgement.
 * Outcome-led and pragmatic, able to move quickly while building solutions that are secure, reusable, observable and supportable.
 * Comfortable operating across software, data, integration and agent tooling rather than within a single technical specialism.
 * Collaborative and straightforward, able to mentor others, challenge constructively and influence technical decisions across organisational boundaries.

## Description

You will remain strongly hands-on while providing technical direction across teams. You will create reusable engineering patterns, make sound architectural trade-offs, mentor other engineers and raise standards for testing, security, observability, deployment and support. The role requires breadth across software, data and integration, with the depth to resolve difficult engineering problems and deliver reliable solutions in a regulated environment., Wealth has ambitious growth objectives. Supporting that growth requires us to scale the expertise of our advisers, planners and support teams without increasing headcount at the same rate.

Our approach is to build practical technology that improves the workflows driving commercial and client outcomes. That includes secure APIs, trusted data products, enterprise integrations and reusable tools that allow applications, workflows and governed agents to act on consistent business capabilities. The objective is to create components that can be used repeatedly across Wealth, increasing delivery speed without compromising control, resilience or supportability.

The team

You will join Wealth Technology and work directly with business, product, architecture, data, security and control teams. As a principal engineer, you will combine hands-on delivery with technical leadership: shaping solutions, influencing engineering direction.

What you'll do

 * Design, build and operate full-stack capabilities, with particular depth in Python services, APIs and backend engineering.
 * Create secure, reusable APIs and integration components that expose business capabilities consistently across the Wealth technology estate.
 * Build governed data products and pipelines, turning source data into reliable, documented and reusable services for applications, analytics and agents.
 * Develop tools that agents can use safely to retrieve data, invoke workflows and complete defined actions, with appropriate authentication, permissions, guardrails and auditability.
 * Own engineering outcomes across the full lifecycle, including design, code, automated testing, deployment, observability, operational readiness and continuous improvement.
 * Provide principal-level technical leadership through design reviews, reusable patterns, mentoring and constructive challenge, while remaining accountable for working software in production.