Senior Fullstack Engineer: Build Scalable Microservices

Uniting Ambition; England; On-site; GBP 90,000 - 120,000; Full time

Job summary

Uniting Ambition is seeking a Senior Fullstack Engineer to design and build scalable backend services in Python and modern React frontends. You will own from API design to production performance, ensuring security and reliability across the stack.

You will work on microservices and data stores, with AWS, Docker, and CI/CD tooling, while contributing to robust frontend and backend systems. This role demands leadership and hands-on delivery in a fast-growing team.

Qualifications

• 8+ years' backend development experience.
• Experience with microservices architecture, event-driven systems, and cloud platforms (AWS).
• Proficiency with Docker, CI/CD (GitHub Actions), and Git.
• Bonus: Kafka/SQS, Terraform/CloudFormation, serverless (Lambda), or MLOps experience.

Responsibilities

• Build and maintain scalable microservices (REST, gRPC, GraphQL) and API endpoints in Python (FastAPI/Flask).
• Develop and maintain React frontends, including state management with Redux or React Query.
• Optimise SQL/NoSQL databases (PostgreSQL, MySQL, MongoDB) for performance and reliability.
• Implement authentication/authorisation (JWT, OAuth2, OpenID Connect) and monitor production performance.

Skills

Backend development

Microservices architecture

Cloud platforms AWS

React frontend development

API design

Docker

CI/CD (GitHub Actions)

Git

Tools

Docker

Git

GitHub Actions

PostgreSQL

MySQL

MongoDB

Kafka

SQS

Terraform

CloudFormation

serverless (Lambda)

Job description

We're hiring a Senior Fullstack Engineer for a growing engineering team. You'll design and build scalable, secure backend services in Python, alongside modern React frontends — with real ownership across the stack, from API design to production performance.

What you'll do

• Build and maintain scalable microservices (REST, gRPC, GraphQL) and API endpoints in Python (FastAPI/Flask)
• Develop and maintain React frontends, including state management with Redux or React Query
• Optimise SQL/NoSQL databases (PostgreSQL, MySQL, MongoDB) for performance and reliability
• Implement authentication/authorisation (JWT, OAuth2, OpenID Connect) and monitor production performance

What you'll bring

• 8+ years' backend development experience building scalable, high-performance systems
• Experience with microservices architecture, event-driven systems, and cloud platforms (AWS)
• Proficiency with Docker, CI/CD (GitHub Actions), and Git
• Bonus: Kafka/SQS, Terraform/CloudFormation, serverless (Lambda), or MLOps experience

Interested? Apply now or send me a message for a confidential chat about the role.