Software Developer

Mustard Systems Ltd.

United Kingdom · Full-time · Mid-Senior

At Mustard, we value quick delivery and real-world impact over perfect code. If you're an engineer who thrives on solving problems quickly and enjoys a flexible, outcome-focused culture, you'll fit right in.

What You'll Work On:

Expand our access to new liquidity providers, through advanced web scraping and reverse engineering techniques
Develop and maintain low-latency real-time data feeds, based on the data extracted, to support trading strategies
Enhance system visibility for our teams to provide insight into integration issues and improvements

We work with an agile approach, following a flexible plan that adapts to new information and opportunities as they arise. Developers are a core part of this process, taking full ownership of their software throughout its lifecycle—from design and development to testing, review, and production support.

Key Responsibilities

Design and Build Impactful Features: Develop new features that align with and drive our business goals, delivering high-quality code that brings measurable value
Collaborate on Code Quality: Review and test code from teammates to ensure functionality, maintainability, performance, and quality standards
Support in Production: Take ownership of your team's software in production, ensuring stability and quickly addressing any issues that arise
Cross-Team Collaboration: Work closely with other development teams on cross-functional projects, and partner with traders and quants to design and implement the best solutions to real business problems
Participate in Out of Hours Support for our Software Systems

Core Tech Stack:

Languages: Python (Python 3.10+), JavaScript/TypeScript for frontend work, and Go for select infrastructure
Tools: RabbitMQ and Kafka for messaging, PostgreSQL and Redis for data storage
Environment: Linux servers
Observability: OpenTelemetry, Prometheus, Grafana and Zabbix

Requirements

Must-Haves:

Strong background in software development, with strong experience with Python
A degree in Computer Science or a numerical subject from a top university
Exceptional communication skills, enabling you to convey complex technical ideas clearly to both technical and non-technical audiences
Strong decision-making abilities, with a knack for making thoughtful trade-offs in both implementation and architectural choices, balancing innovation and practicality
Experience with web scraping and reverse engineering techniques, including working against bot protection tooling

Nice-to-Haves:

Familiarity with building event-driven systems
Comfort with Linux/Unix environments
Track record of driving successful cloud migrations, ideally to AWS, including setting up secure, scalable account and access structures

Benefits

Why join Mustard Systems?

Work on cutting-edge systems in a competitive and innovative field
Collaborate with a smart, driven team, where your contributions directly impact business performance
Opportunity to drive the company's technical direction and double its revenue in the next three years

Comprehensive benefits, including:

Competitive salary and significant bonus potential
Enhanced pension match with salary sacrifice option
Health insurance and life assurance
Sabbatical leave after five years
33 days of annual leave (including bank holidays)

Key Skills

Ranked by relevance

reverse engineering python postgresql prometheus rabbitmq grafana redis kafka linux cloud aws

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