About 

Subsets is an agentic lifecycle growth platform for subscription media businesses. We help leading companies, such as The Atlantic, Daily Mail, and Matas, increase subscription growth through AI-driven retention and engagement initiatives. By analyzing subscriber behavior, Subsets automatically generates audiences and measures the incremental revenue lift in lifetime value, all within a no-code platform designed for Lifecycle Marketing and Growth teams.

Commercially, we are growing fast across the UK and the US. We are building a company culture of highly dedicated people with a strong work ethic and a preference for an in-office environment. 

We are looking for a Fullstack Software Engineer. As a startup, we move fast and priorities shift quickly. We need someone comfortable working across the entire stack and taking on varied challenges. Flexibility and adaptability is key. You'll own and develop new features from conception to deployment, ensuring reliability and scalability across our platform.

In this role, you will

• Build product features end-to-end, from backend APIs to frontend interfaces

• Keep the codebase maintainable through solid architecture, refactoring, and testing

• Work closely with design and product people to deliver smooth, intuitive user experiences

• Instrument features and gather the right metrics to help the team make informed decisions

  
  

You may be a good fit if you have

• (Required) React/Vite experience. Realistically, any modern frontend framework is fine (React, Vue, Svelte, etc.).

• (Required) Some experience with .NET and Entity Framework Core.

• Experience with DDD

• Experience with event-driven data architecture.

• PostgreSQL (or general SQL) expertise.

• Experience with Google Cloud Platform.

• Familiarity with Claude Code or other coding agent tools. 

• Strong bias toward action and self-direction with the ability to work autonomously without much oversight. 

• Anti-meeting culture mindset. 

This is neither an exhaustive nor a necessary list of capabilities. If none of these apply to you, but you believe you can contribute to Subsets, please reach out.

How We Work

Our tech stack

• Backend: .NET 10, Entity Framework Core, PostgreSQL,  Hangfire, Redis. 

• Frontend: React.js, Vite, Tailwind CSS, shadcn/ui. 

• Infrastructure & CI/CD: Google Cloud Platform (GCP),  Terraform, GitHub Actions. 

Lightweight and efficient development culture

• Issue tracking and planning via Linear

• 2-week sprints

• Anti-meeting culture - we value focused work time

Benefits

• Competitive salary

• Equity package: 0.3%-0.6% (favorable taxation under §7p, read: no upfront tax on your options!)

• Company card for all things food/snacks: order whatever office snacks you like (we frequently get mango smoothies, protein drinks, barbells, monster, etc.)

• Great breakfast and lunch (and dinner when working late in the office) 

• Office kayaks 🛶

Applying

• Send your resume and LinkedIn profile.

• We will typically meet three times: 1) for an introductory coffee in our Copenhagen office, 2) for an in-depth technical interview, and 3) for a work trial.

Subsets does not accept remote applications. We value flexibility but prioritize working together from our Copenhagen office most of the time.