Python Backend Developer

Mustard Systems Ltd.; Greater London; Hybrid; GBP 95,000 - 130,000; Full time

Benefits offered by this job

Hybrid working environment

Competitive salary with bonus

Enhanced pension matching

Health insurance and life assurance

Sabbatical after five years

33 days annual leave

Job summary

Mustard Systems Ltd. in London builds data-driven trading software using Python, Go and JavaScript/TypeScript to deliver real-time insights. The role emphasizes fast delivery, ownership of features, and collaboration with traders and quants to solve real business problems.

You will design and implement low-latency data feeds, enhance system visibility, and work across teams in an agile environment. Hybrid work and a competitive compensation package are offered.

Qualifications

• Strong background in software development with Python experience.
• Degree in Computer Science or numerical subject from a top university.
• Excellent communication skills for conveying complex ideas to technical and non-technical audiences.
• Good decision-making with trade-offs in implementation and architecture.
• Experience with web scraping and reverse engineering, including anti-bot tooling.
• Minimum 3 years of software development experience.

Responsibilities

• Design and build features aligned with business goals and deliver high-quality code.
• Review and test code to ensure functionality, performance, and quality.
• Own your team’s software in production, maintaining stability and addressing issues.
• Collaborate with other development teams and traders to design optimal solutions.
• Participate in out-of-hours support for software systems.

Skills

Python

Web scraping

Reverse engineering

Go

JavaScript/TypeScript

Linux

Communication skills

Decision making

Education

Bachelor's degree in Computer Science or numerical subject

Tools

RabbitMQ

Kafka

PostgreSQL

Redis

OpenTelemetry

Prometheus

Grafana

Zabbix

Job description

At Mustard Systems, we leverage statistical modeling to dive into sports events and help us make informed predictions about future outcomes. By utilising our unique datasets, advanced statistical models, and custom-built software, we strive to accurately forecast sports results.

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

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.

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).