Lead Python Developer

Client Server; City of Westminster; On-site; GBP 90,000 - 110,000; Full time

Benefits offered by this job

Pension

Additional benefits

Job summary

Client Server is seeking a skilled Python lead to drive a small tech team in delivering new features on a core banking platform. You will refactor code, collaborate across disciplines, and balance architectural work with people management to foster growth.

The role requires strong SDLC experience, cloud familiarity (GCP/AWS/Azure), and mentoring capabilities. A STEM degree with a 2.1+ is expected, with a focus on continuous improvement and robust communication.

Qualifications

• Skilled Python developer with team leadership experience
• Strong knowledge of software engineering best practices
• Full SDLC experience
• Team leadership including mentoring and performance reviews
• Knowledge of cloud-based services (GCP preferred, AWS or Azure acceptable)
• Experience building APIs, ideally with FastAPI
• Good understanding of CI/CD, testing, and deployment
• Thorough understanding of CS fundamentals such as OOP, Data Structures, Design Patterns, and Algorithms
• Collaborative and pragmatic with great communication skills
• Degree in a STEM discipline with a 2.1 or above

Responsibilities

• Lead a small tech team to deliver new features and enhancements
• Refactor and contribute to the core banking platform
• Collaboratively problem-solve in a hands-on role
• Maintain a 50/50 split between architecture/design and people management
• Set standards and mentor junior developers
• Foster a culture of continuous improvement and self-development

Skills

Python development

Team leadership

Software engineering best practices

Full SDLC

APIs with FastAPI

Cloud services (GCP/AWS/Azure)

CI/CD, testing, deployment

CS fundamentals (OOP, Data Structures,

Algorithms

Communication

Education

STEM degree with 2:1 or above

Job description

Salary: £100,000 - 100,000 per year

Requirements

• Skilled Python Developer with team leadership experience


• Strong knowledge of software engineering best practices


• Full SDLC experience


• Team leadership experience, including mentoring and conducting performance reviews


• Knowledge of cloud-based services (GCP preferred, AWS or Azure acceptable)


• Experience building APIs, ideally with FastAPI


• Good understanding of CI/CD, testing, and deployment


• Thorough understanding of Computer Science fundamentals such as OOP, Data Structures, Design Patterns, and Algorithms


• Collaborative and pragmatic with great communication skills


• Degree in a STEM discipline with a 2.1 or above

Responsibilities

• Lead a small, talented tech team to deliver new features and enhancements


• Refactor and contribute to the core banking platform


• Collaboratively problem-solve in a hands-on role


• Maintain a 50/50 split between architecture/design and people management


• Set standards and mentor junior developers


• Foster a culture of continuous improvement and self-development

Technologies

• AWS


• Azure


• CI/CD


• Cloud


• FastAPI


• GCP


• OOP


• Python

More

We are a well-funded and profitable FinTech start-up based in Central London, offering a competitive salary of up to £120k, plus pension and additional benefits. Our team is diverse, and we believe in a workplace that allows individuals to play to their strengths while continually learning. We embrace equality and do not discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.

last updated 36 week of 2026