Senior Python Developer

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This role is for a Senior Python Developer with 5+ years of experience in object‑oriented languages, focusing on mission‑critical applications. It offers a hybrid work model, competitive pay, and requires strong skills in Python, relational databases, and financial services.

Treasury Spring is a fast‑growing London‑based fintech company that delivers a proprietary platform for institutional investors, enabling billions of dollars in investment and liquidity management every day. Founded in 2018, we operate a regulated Fixed‑Term Fund platform that connects cash‑rich firms to institutional borrowers and serves a range of high‑growth tech companies, asset managers, and private equity funds.

• Designing and developing mission‑critical systems and applications that support trading, investment operations, and client‑facing products.
• Analyzing requirements, proposing solutions, and designing software components and systems.
• Writing high‑quality, efficient, and maintainable code.
• Participating in code reviews, providing feedback, and ensuring coding standards and best practices are followed.
• Mentoring and coaching less‑experienced developers.
• Communicating effectively with stakeholders to understand requirements and provide project updates.
• Optimizing the performance of Python applications, identifying bottlenecks, and implementing scalability solutions.
• Keeping up to date with the latest trends and technologies in Python development and software engineering.

• 5+ years of experience developing complex applications using an object‑oriented language (Python preferred, experience in C++, C#, Java, or similar also acceptable).
• Experience with mission‑critical applications and a robust software development life cycle.
• Strong communication, problem‑solving skills, and a passion for learning.
• Experience and enthusiasm for test‑automation and CI/CD.
• Strong STEM degree or equivalent professional experience.
• Deep knowledge of Python and frameworks we use:
  Flask, SQL Alchemy, Alembic, Pydantic.
• Experience with relational databases, ideally Postgre
  
  SQL.
• Experience with message‑based architectures and queuing technologies such as Rabbit
  
  MQ.
• Experience with REST and/or Graph
  
  QL APIs.
• Knowledge of core AWS services (EC2, ECS, RDS, S3).
• Experience using observability tools like Datadog.
• Knowledge of containerization:
  Docker, Kubernetes, AWS Fargate.
• Experience in full‑stack development using Type Script and React (beneficial).
• Experience building software for financial services or investment management organisations.

• Competitive salary, depending on experience.
• Equity and bonus scheme.
• Unlimited paid leave.
• Hybrid office‑working model near Green Park station, London.
• Enhanced parental leave and pay.
• Workplace pension.
• Comprehensive Bupa health‑care cover.
• Life and income protection insurance.
• Employee assistance programme (Yulife).
• Remote office set‑up budget.
• Cycle‑to‑work scheme.
• Regular team‑building activities and events in a fun, dynamic working environment.

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