Full-Stack Engineer, AI-Driven Membership Platform

United States Digital Space LLC; Helsinki; Hybrid; EUR 70,000 - 110,000; Full time

Benefits offered by this job

Lunch benefit

Wellness benefit

Flexible working hours + work-life ́

Collaborative, smart teammates

Office in Helsinki city center

Job summary

United States Digital Space LLC is seeking a seasoned Full-Stack Engineer to build Membership experiences across web frontend and cloud-backed services. You’ll work on customer-facing features that impact retention and revenue, while ensuring reliability and security of the systems behind them.

You’ll own vertical slices of the roadmap, collaborate with Product, Design, and SRE, and apply AI-assisted tools responsibly to accelerate development and testing.

Qualifications

• Several years of professional software development experience (4+ years).
• Strong skills in TypeScript/JavaScript and production-grade software delivery.
• Solid experience with React or a comparable frontend framework.
• Experience building or consuming APIs and backend services (Node.js/Express).
• Experience with automated tests and code reviews.
• Practical understanding of cloud-based systems, preferably AWS.
• Ability to own problems and communicate trade-offs clearly.
• Collaborative mindset in distributed teams.
• Interest in learning across the stack and AI-assisted development.
• Familiarity with AI coding tools and their limitations.

Responsibilities

• Work with Product, Design, and engineers to understand customer problems, shape solutions, and deliver them at scale.
• Own vertical slices of the Membership roadmap from technical discovery through implementation, release, and production operation.
• Build accessible, responsive, and reliable web experiences using TypeScript, React, and modern frontend practices.
• Design and implement backend services and APIs using Node.js, Express, and related technologies.
• Work with data models, external integrations, and the failure modes that come with payments, subscriptions, billing, and account access.
• Create maintainable, testable code and contribute to automated testing at the appropriate levels.
• Participate in code reviews, technical discussions, and documentation that help the team move quickly without sacrificing quality.
• Participate in the team’s upkeep rotation, including monitoring, debugging, and resolving production issues.
• Support safe releases and improve observability, reliability, performance, and product health over time.
• Collaborate with teams including Finance, Marketing, and SRE.
• Identify opportunities to automate recurring work and fix problems at their root.
• Use AI-assisted engineering tools thoughtfully in your daily work, for example to explore solutions, generate or improve code, create tests, investigate issues, and document systems.
• Evaluate AI-generated output critically and take responsibility for correctness, security, maintainability, and the experience delivered to members.

Skills

TypeScript/JavaScript

React

APIs

Node.js/Express

Testing & code reviews

Cloud basics (AWS)

Tools

GraphQL

AWS CDK

Docker

Kubernetes

Job description

United States Digital Space LLC is seeking a seasoned Full-Stack Engineer to build Membership experiences across web frontend and cloud-backed services. You’ll work on customer-facing features that impact retention and revenue, while ensuring reliability and security of the systems behind them.

You’ll own vertical slices of the roadmap, collaborate with Product, Design, and SRE, and apply AI-assisted tools responsibly to accelerate development and testing.