Software Developer

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
• At least 3 years experience in software development
  

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?

• Hybrid working environment. We're in the office every Monday, Tuesday and Thursday, and work from home every Wednesday and Friday
• 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)