Senior Python Engineer - FinTech API & AWS

Remote Auto; United Kingdom; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Medical Insurance

Paid vacations

Remote option

English classes

Team events

Job summary

Mobilunity is recruiting a Senior Python Engineer on behalf of a UK client. You will join a small, international product team building an API-first fintech platform that delivers automated working capital to UK small businesses.

Design and build scalable backend services with Python, AWS serverless, and domain-driven design. You will own critical components, collaborate with domain experts, and help shape architecture in a fast-paced, test-driven environment.

Qualifications

• Strong commercial experience with Python.
• Experience building production services on AWS.
• Hands-on with AWS Lambda and DynamoDB.
• Experience with event-driven AWS services (EventBridge/Step Functions).
• Strong understanding of typed Python and Pydantic or similar.
• Experience with Infrastructure as Code (Terraform).
• Strong SQL and data modelling skills.
• Experience designing scalable backend systems and APIs.
• Knowledge of software architecture and system design principles.
• Experience with AI coding tools in a professional setting.

Responsibilities

• Design, develop and maintain scalable backend services using Python.
• Design and implement domain services using Domain-Driven Design.
• Build performant, secure and fault-tolerant serverless solutions on AWS.
• Collaborate with SMEs to translate business requirements into tech solutions.
• Participate in architectural and tech decisions at project level.
• Design and maintain idiomatic APIs and service boundaries.
• Work with data modelling and SQL to support data-driven decisions.
• Contribute to infrastructure-as-code and cloud engineering practices.
• Troubleshoot and improve production systems.
• Mentor engineers and contribute to best practices.

Skills

Python

AWS

AWS Lambda

DynamoDB

Pydantic

Terraform

SQL

API design

Domain-driven design

TDD

Tools

AWS

Terraform

GitHub Actions

Job description

Mobilunity is recruiting a Senior Python Engineer on behalf of a UK client. You will join a small, international product team building an API-first fintech platform that delivers automated working capital to UK small businesses.

Design and build scalable backend services with Python, AWS serverless, and domain-driven design. You will own critical components, collaborate with domain experts, and help shape architecture in a fast-paced, test-driven environment.