> Markdown version of [/jobs/ext/3167315-senior-software-engineer](https://www.wearedevelopers.com/jobs/ext/3167315-senior-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior Software Engineer

- **Company:** DW Search
- **Location:** Greater London, UK
- **Experience:** Expert
- **Salary:** £80,000.0 - £120,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Distributed Systems, Python (Programming Language), Enterprise Messaging Systems, MongoDB, Oracle (Applications), Data Streaming, ReactJS, Backend, Core Data
- **Published:** September 8, 2026
- **Apply:** https://www.collegerecruiter.com/job/2840574344-senior-software-engineer

## About the Role

* Python (core focus), some Java and React (experience not essential)
 * Messaging systems and distributed architectures
 * MongoDB (core data store), some Oracle, * Strong Python backend engineering experience in production environments
 * Experience building and operating complex, business-critical systems
 * Solid understanding of system design, data flows, and distributed systems
 * Comfortable working in evolving platforms with multiple stakeholders
 * Financial services experience is helpful but not required if candidates can show a genuine interest and conceptual understanding

## Description

You'll be working on a backend-heavy platform that underpins pricing, workflows, and trade data across the business. The system is being rolled out more broadly, with a focus on improving visibility, reducing manual processes, and creating a single, scalable platform.The work is strongly focused on Python and system design, building production-grade services rather than lightweight scripting., * Building and evolving backend services in Python within a distributed system

 * Working on data-intensive workflows and messaging-driven architectures
 * Contributing to a platform designed as a single source of truth across teams
 * Automating manual processes and enabling faster product and workflow rollout
 * Collaborating closely with engineers and front office users