Senior Software Engineer

10 Days Old

We are looking for an experienced Senior Python Software Engineer to take ownership of an established trading-related application and drive its ongoing development. You will manage and enhance the existing codebase, deliver new features, ensure reliability and performance, and help evolve the system as the business grows.
This is an excellent opportunity for someone who enjoys autonomy, technical responsibility, and working on low-latency, high-performance applications.
What Youll Do
Maintain, extend, and optimise an existing Python-based trading application
Add new features and improve current capabilities with a focus on performance, reliability and clean architecture
Build and optimise real-time pipelines handling high-frequency data
Improve latency, throughput, and reliability using profiling and performance engineering
Work with Redis, Azure VMs, and Anaconda environments
Implement and maintain systems requiring millisecond-level timing precision
Troubleshoot production issues quickly during key market hours
Collaborate directly with the founder to shape technical direction and priorities
Integrate with market data feeds and brokerage/order-routing components
Essential Skills
Expert-level Python developer (min. 5+ years professional python experience)
Demonstrable experience with low-latency/high-throughput systems
(e.g., real-time data processing, trading/market data, telemetry, adtech bidding, streaming systems, etc.)
Strong understanding of asynchronous programming, multiprocessing, and performance optimisation
Experience handling large volumes of fast-moving data with careful performance considerations
Ability to profile, measure, and improve performance
Comfortable owning an existing codebase: refactors, architecture improvements, clean tests
Experience with Redis and general database performance considerations
Competent with Azure cloud environments (VMs, deployment, monitoring, etc.)
Comfortable working independently, making architectural decisions, and maintaining high code quality
Strong engineering discipline: correctness, edge cases, careful time-handling, attention to detail
UK-based and available for support during core market hours when needed
Desirable Skills
Experience with algorithmic trading or market data systems
Familiarity with Interactive Brokers TWS or other brokerage APIs
Experience with distributed systems, message queues, or event-driven architectures
Background in financial markets or fintech
What We Offer
Competitive salary - negotiable based on experience
Mostly remote, with some in-office collaboration days for coordination and planning
Yearly bonus based on company performance
The chance to take significant ownership of a live, production-grade system
Long-term role with the opportunity to influence the roadmap and system design
A lean environment with minimal bureaucracy and direct impact

TPBN1_UKTJ
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Location:
Leeds
Salary:
£100,000
Job Type:
FullTime
Category:
IT

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