Senior Full Stack Engineer

1 week ago

London, Greater London, United Kingdom Find Full time £90,000 - £110,000 per year

We're looking for a Senior Full Stack Engineer who brings strong technical expertise across backend and frontend development. You'll work across our internal platform to build scalable, reliable, and secure systems. This role is focused on hands-on engineering, delivering high-quality features end-to-end, and collaborating closely with product, design, and other engineering teams.

Responsibilities
  • Backend (Core Focus):
  • Build and maintain backend services using ) and TypeScript
  • Develop and optimize APIs, integrations, and data-processing flows
  • Model, query, and optimize relational and document data using PostgreSQL and MongoDB
  • Implement and maintain asynchronous workflows and event-driven components using RabbitMQ
  • Work with Elasticsearch to implement robust, scalable search functionality
  • Ensure code quality, performance, and reliability across backend components
  • Write clear documentation for services, data flows, and technical decisions

Frontend (Platform/Internal Tools):
  • Build internal tools, admin panels, and data management interfaces
  • Develop lightweight frontend components using TypeScript and modern web frameworks
  • Integrate frontend and backend systems securely and efficiently
  • Infrastructure & Collaboration
  • Work with AWS and Docker to deploy and operate services
  • Participate in CI/CD processes and trunk-based development
  • Troubleshoot issues across the entire stack and propose meaningful improvements.
  • Collaborate with cross-functional teams to integrate Nucleus across products and services
  • Contribute to improving engineering processes, standards, and workflows
Requirements
  • 4+ years of experience as a Full Stack or Backend Engineer
  • Strong hands-on experience with: ), TypeScript, PostgreSQL
  • Strong hands-on experience with: MongoDB, RabbitMQ, Elasticsearch, AWS, and Docker
  • Experience building and maintaining production systems at scale
  • Experience with CI/CD and trunk-based development

Nice to Have
  • Experience with observability tools (logging, metrics, tracing)
  • Strong understanding of system design, APIs, and performance optimization
  • Familiarity with event-driven systems and messaging patterns
  • Strong collaboration and communication skills
  • Experience with service integrations across multiple teams
  • Familiarity with data compliance and security best practices

 is an Equal Opportunity / Affirmative Action employer committed to diversity in the workplace. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, age, national origin, disability, protected veteran status, gender identity or any other factor protected by applicable federal, state, or local laws.

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