Senior Python Developer

The role: Senior Python Developer

Join our lean UK-based technology team as a Senior Python Developer, where you'll play a pivotal role in the development of our systems. Working closely with the CTO and Head of Software Engineering, you'll have the opportunity to make a significant impact within our growing fintech business. This role offers the flexibility of remote work alongside visits to our offices in Mayfair, London.

Our proprietary technology platform handles billions of dollars worth of our customers' investments every day, capturing all client orders and managing the entire investment cycle. Our backend services are built in Python3
, backed by a Postgres database. This includes a proprietary workflow engine built around a Scheme-based workflow notation.

Our frontend systems include our clean, simple web portal for client order capture and reporting, built in Type Script and React; with server‑side REST and Graph

QL APIs written in Python
3.

What we’re looking for…

Essential skills and experience:

• 5+ years experience of developing complex applications using an OO language (ideally Python, but experience in C++ / C# / Java / etc would also be considered)
• Experience working on mission‑critical applications, following a robust SDLC
• Excellent communication and problem‑solving skills; and a strong aptitude for learning
• Experience and enthusiasm for test‑automation and CI/CD
• Strong STEM degree or equivalent professional experience
• Deep knowledge of Python, including any of the frameworks we currently use:
  Flask, Sql Alchemy, Alembic, Pydantic
• Experience with relational databases, ideally Postgres
• Experience of message‑based architectures, and queuing technologies, i.e. RabbitMQ
• Experience of REST and/or Graph
  
  QL APIs
• Knowledge of the core AWS services: i.e. EC2 / ECS, RDS, S3
• Experience using Data Dog or similar observability tools
• Knowledge of containerisation:
  Docker, Kubernetes, AWS Fargate etc
• Any experience of front‑end or fullstack development using Type Script & React
• Experience building software for financial services and/or investment management organisations

We don’t expect candidates to have knowledge of all of the above, but we hope you’re keen to learn!

What you’ll do: Responsibilities

• Designing and developing mission‑critical systems and applications that support our trading and investment operations, and our client‑facing products.
• Analysing requirements, proposing solutions, and designing software components and systems.
• Writing high‑quality, efficient, and maintainable code.
• Participating in code reviews, providing feedback to other team members and ensuring that coding standards and best practices are followed throughout the development process.
• Mentoring and coaching less‑experienced developers, helping them improve their skills, learn best practices, and grow professionally.
• Communicating effectively with stakeholders to understand requirements and provide updates on project progress.
• Optimising the performance of Python applications, identifying bottlenecks and inefficiencies and implementing solutions to improve scalability, responsiveness, and efficiency.
• Staying updated on the latest trends, technologies, and best practices in Python development and software engineering.

What we offer: Benefits

• Competitive salary, depending on experience
• Equity and bonus scheme
• Hybrid office‑working model – we're in a great location near Green Park station in London
• Enhanced Parental Leave and Pay
• Complete Bupa Health Care Cover
• Life Insurance
• Income Protection Insurance
• Access to Yulife (Employee Assistance Programme)
• Remote Office set‑up budget
• Cycle to Work Scheme
• A fun and dynamic working environment with regular team‑building activities and events

Mid‑Senior level

Full‑time

Information Technology