Senior Python Developer

Velocity Tech; Greater London; On-site; GBP 75,000 - 110,000; Full time

Job summary

Velocity Tech in the United Kingdom is seeking a senior software engineer to join our backend team. You will design, build, and operate scalable backend services, APIs, and data platforms, collaborating with product and data teams.

The ideal candidate has 5+ years of experience, deep Python expertise, and a strong grasp of architecture, cloud, containers, testing, and DevOps practices. You’ll help drive robust, observable systems in a fast-growing environment.

Qualifications

• 5+ years of professional software engineering experience.
• Strong commercial experience with Python.
• Experience building and operating production backend systems at scale.
• Strong understanding of software architecture, system design, and engineering best practices.
• Experience developing APIs and distributed systems.
• Strong knowledge of databases such as PostgreSQL, MySQL, or similar.
• Experience with testing, CI/CD, version control, and modern development workflows.
• Experience working with cloud platforms such as AWS, GCP, or Azure.
• Experience with Docker and containerised environments.
• Strong problem-solving skills and a pragmatic approach to engineering.
• Excellent communication skills and the ability to work effectively in a collaborative environment.

Skills

Python

Backend systems

APIs

Distributed systems

Software architecture

Cloud platforms

Testing/CI_CD

Version control

Modern development workflows

Databases (PostgreSQL/MySQL)

Communication skills

Problem-solving

Tools

Docker

Job description

• 5+ years of professional software engineering experience.
• Strong commercial experience with Python.
• Experience building and operating production backend systems at scale.
• Strong understanding of software architecture, system design, and engineering best practices.
• Experience developing APIs and distributed systems.
• Strong knowledge of databases such as PostgreSQL, MySQL, or similar.
• Experience with testing, CI/CD, version control, and modern development workflows.
• Experience working with cloud platforms such as AWS, GCP, or Azure.
• Experience with Docker and containerised environments.
• Strong problem-solving skills and a pragmatic approach to engineering.
• Excellent communication skills and the ability to work effectively in a collaborative environment.

Nice to Have

• Experience with FastAPI, Django, or Flask.
• Experience with Kubernetes and cloud-native infrastructure.
• Familiarity with event-driven architectures and technologies such as Kafka.
• Experience working with AI/ML, data platforms, or high-volume systems.
• Experience in a startup or high-growth technology environment.