Senior Fullstack Software Engineer

Job Title:
Senior Software Engineer
Location: London (Hybrid: 2-3 days/week in office)
Contract Type: Permanent
Salary: up to 100,000(DOE)

About the Role
We're looking for a skilled and experienced Senior Software Engineer to join a fast-paced, product-focused team building innovative technology that delivers real impact. You'll work across the full development lifecycle-from design and implementation to deployment and monitoring-taking ownership of your work and contributing to a collaborative engineering culture.

This is a hands‑on role where you'll be empowered to make technical decisions, mentor others, and help shape the future of a platform used by thousands.

• Design, build, release, and monitor software systems end-to-end
• Collaborate with product, design, and data teams to deliver user‑focused features
• Provide technical leadership and mentorship to other engineers
• Use data to inform decisions and prioritise development efforts
• Work flexibly across the stack, with opportunities to specialise or broaden your scope

• Proven ability to define and deliver long‑term technical direction in ambiguous environments
• Full‑stack development experience, with ownership of technical decisions and outcomes
• Experience designing and deploying scalable, observable, and maintainable systems
• Familiarity with microservices architecture (synchronous and asynchronous)
• Strong experience with NodeJS, Type Script/JavaScript, and React
• Good understanding of cloud platforms (AWS, GCP, Azure)
• Solid grasp of database technologies and trade‑offs
• Experience with automated testing and web security best practices
• Background in SaaS, ideally B2B2C or consumer‑facing tech

• React Native best practices
• Native app development (iOS, Android), Expo
• Event‑driven systems and distributed architecture
• Technologies such as GCP (GKE, Pub Sub, Big Query), Temporal, Postgres, Circle
  
  CI, ArgoCD, Kubernetes, Helm, Docker, Terraform
• Experience in zero‑to‑one product development or highly innovative domains

• Competitive salary
• 25 days annual leave plus bank holidays
• Private healthcare and life assurance
• Dedicated Learning & Innovation time every second Friday
• Hybrid working with flexible hours
• Free drinks and snacks in their london office

Both Modis International Ltd and Modis Europe Ltd are Equal Opportunities Employers.