Senior Software Engineer, Client Solutions

Winton Group; Greater London; On-site; GBP 75,000 - 100,000; Full time

Job summary

A prominent financial technology firm in Greater London is looking for a Senior Software Engineer to design and build resilient, event-driven systems. You'll engage across the engineering lifecycle while using modern AI-assisted tools. Candidates should have over 5 years of experience in software development and a strong background in backend technologies like C#/.NET. Join a collaborative environment with a focus on continuous improvement and technical excellence.

Qualifications

• 5+ years of full‑time professional software development experience.
• Proven experience building cloud‑distributed systems.
• Strong computer science fundamentals.

Responsibilities

• Design and maintain event‑driven systems.
• Ensure systems are operable and resilient.
• Collaborate with product and business stakeholders.

Skills

High reliability systems design

Event-driven architecture

C#/.NET

Clean code and documentation

Collaboration in teams

Education

Bachelor's or master's degree in a STEM subject

Tools

PostgreSQL

MSSQL

Angular

Typescript

Job description

Senior Software Engineer, Client Solutions

We are seeking a highly capable Senior Software Engineer to help design, build and evolve resilient, event-driven, cloud-distributed systems. This role is ideal for an engineer who combines deep technical expertise, strong computer science fundamentals, and commercial awareness – someone who not only understands how systems work, but what they are meant to do and why. The role requires a constructive, can‑do approach and the ability to operate effectively in a fast‑paced setting.

You will work across the full engineering lifecycle from system architecture and data modelling to implementation, testing and operational excellence. You will be encouraged to use modern AI‑assisted tooling and continuously improve our platforms, while maintaining a pragmatic balance between innovation and delivery.

You will be part of a friendly and collaborative broader team responsible for post‑trade and reporting software development. The role involves working primarily in the Client Solutions space but also directly with business functions across the firm to understand requirements, design and implement solutions. As well as project work, there are regular allocated windows of opportunity for small enhancements for both the business and technology.

Your responsibilities will include:

• Design, evolve and maintain distributed, event‑driven systems with high reliability, scalability and observability
• Contribute to technical strategy and long‑term platform direction
• Write high‑quality, efficient and maintainable code with accompanying automated tests and documentation across UI, services and data storage layers
• Continuously improve existing services, libraries and shared components
• Ensure systems are operable, measurable and resilient, including appropriate monitoring, alerting and failure‑handling strategies
• Work closely with product and business stakeholders to translate high‑level problems into thoughtful technical solutions
• Collaborate with team through active contribution in code reviews, knowledge‑sharing and design discussions
• Build domain knowledge in business and technology areas
• Evaluate new technologies pragmatically
• Contribute to CI/CD pipelines, tooling and infrastructure‑as‑code

What we are looking for:

• A bachelor's or master's degree in a STEM subject
• 5+ years of full‑time professional software development experience
• Proven experience building and maintaining cloud‑distributed, event‑driven or microservices‑based systems written in enterprise‑grade backend technologies such as C#/.NET (preferred)
• Strong computer science fundamentals
• Excellent engineering discipline: clean code, meaningful abstractions, test automation, documentation and version control best practice
• Natural curiosity and enthusiasm about using AI‑assisted development tools and integrating them into daily workflow
• Keen interest in keeping aware of latest technologies and a measured approach for adopting them
• Comfortable problem solving across multiple technologies and business domains
• Collaborative nature and ability to work in a team, e.g., partnering with business users and technologists
• Ability to have constructive technical discussions

What would be useful:

• An interest or experience with Angular and Typescript
• Familiarity with performance‑tuning PostgreSQL and/or MSSQL
• Experience in financial services

We are proud to be an equal‑opportunity workplace. We do not discriminate based upon race, religion, color, national origin, sex, sexual orientation, gender identity/expression, age, status as a protected veteran, status as an individual with a disability, or any other applicable legally protected characteristics.

Our assessment and selection processes are aimed at you showcasing your abilities rather than passing arbitrary tests. They are designed according to the requirements of our teams to identify the skills and attributes we seek. A member of our recruitment team will work with you throughout the process, guiding you at each stage.