Web Developer (Python)

Signify Technology; Greater London; On-site; GBP 95,000 - 130,000; Full time

Job summary

Signify Technology is seeking a Senior Software Engineer, Web to join a global exchange operator's web engineering team in London. You will design and build full stack web solutions, from front-end visualisations to backend APIs and SQL database implementations, owning features end to end.

You will mentor junior engineers, contribute to sprint planning, and uphold high standards for code quality, testing, automation, and user experience in a fast-paced financial markets environment.

Qualifications

• 5+ years building high-performance, data-driven web applications.
• Experience with MVC frameworks; Django preferred.
• Comfortable in a fast-paced financial markets environment.
• Excellent communication with technical and non-technical stakeholders.

Responsibilities

• Design and build full-stack web solutions from frontend visuals to backend APIs and SQL databases.
• Own features end-to-end and contribute to sprint planning.
• Mentor junior engineers and act as SME across systems.
• Commit to code quality, testing, automation, and strong UX.

Skills

Web development

MVC frameworks

Django

SQL/PostgreSQL

APIs

Communication

Tools

PostgreSQL

SQL

Apache

Unit testing

Full stack testing

Job description

Senior Software Engineer, Web, Global Exchange Operator

London 4x Days per week in office

We are working exclusively with one of the world's largest exchange operators, a business at the centre of global financial markets. They are looking for a Senior Software Engineer to join their web engineering team, building and maintaining the primary interface for command and control of three European equities venues, trade reporting and SI technology services. These are high-traffic, high-stakes systems handling millions of requests per day.

The Role

You will design and build full stack web solutions from front end visualisations through to backend APIs and SQL database implementation. This is a hands‑on senior role where you will own features end to end, contribute to sprint planning, mentor junior engineers and act as subject matter expert across one or more systems. The team cares deeply about code quality, testing, automation and user experience.

CSS3PostgreSQL andSQL, Apache, unit testing and full stack web testing

What They Are Looking For

• 5+ years building high‑performance, data‑driven web applications
• Experience with MVC frameworks, Django preferred
• Comfortable working in a fast‑paced, deadline‑driven financial markets environment
• Strong communicator able to work across technical and non-technical stakeholders