Software Developer

Mustard Systems Ltd.; City Of London; On-site; GBP 50,000 - 70,000; Full time

Benefits offered by this job

Competitive salary with significant bonus potential

Enhanced pension match

Health insurance

Sabbatical leave after five years

33 days of annual leave

Job summary

A leading technology firm in London is seeking a mid-senior level software developer with expertise in Python. You will design and build features, collaborate on code quality, and take ownership of production software. Ideal candidates have a degree in Computer Science and strong experience in web-scraping techniques. This full-time role offers a competitive salary and benefits including health insurance and enhanced annual leave.

Qualifications

• Strong background in software development with extensive experience in Python.
• Exceptional communication skills for conveying complex ideas.
• Experience with web-scraping and reverse-engineering techniques.

Responsibilities

• Design and build impactful features that align with business goals.
• Collaborate on code quality and perform testing.
• Take ownership of production software for stability and issues.

Skills

Python

Software development

Communication skills

Decision-making

Web-scraping techniques

Education

Degree in Computer Science or numerical subject

Tools

RabbitMQ

Kafka

PostgreSQL

Redis

Job description

Job Overview

At Mustard, we value quick delivery and real‑world impact over perfect code. If you thrive on solving problems quickly and enjoy a flexible, outcome‑focused culture, this role could be a great fit.

What You’ll Work On

• Expand access to new liquidity providers using advanced web‑scraping and reverse‑engineering techniques.
• Develop and maintain low‑latency real‑time data feeds to support trading strategies.
• Enhance system visibility for our teams, providing insights into integration issues and improvements.

Key Responsibilities

• Design and build impactful features that align with business goals, delivering high‑quality code that adds measurable value.
• Collaborate on code quality: review, test, and ensure functionality, maintainability, performance, and quality standards.
• Take ownership of production software, ensuring stability and addressing issues quickly.
• Collaborate cross‑team, partnering with traders and quants to design solutions to real business problems.
• Participate in out‑of‑hours support for our software systems.

Core Tech Stack

• Languages: Python 3.10+, JavaScript/TypeScript for frontend, Go for select infrastructure.
• Tools: RabbitMQ, Kafka, PostgreSQL, Redis.
• Environment: Linux servers.
• Observability: OpenTelemetry, Prometheus, Grafana, Zabbix.

Requirements

Must‑Haves

• Strong background in software development with extensive experience in Python.
• A degree in Computer Science or a numerical subject from a top university.
• Exceptional communication skills, able to convey complex technical ideas clearly to technical and non‑technical audiences.
• Strong decision‑making abilities, adept at making thoughtful trade‑offs in implementation and architecture.
• 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 accounts and access structures.

Benefits

• Competitive salary with 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).

Seniority Level

Mid‑Senior level

Employment Type

Full‑time

Job Function

Engineering and Information Technology

Location

London, England, United Kingdom