Backend Infrastructure Engineer
Backend Infrastructure Engineer
Join us in building the backend that powers world-class creativity apps used by millions of people.
Appostrophe is a Stockholm-based mobile app studio creating easy-to-use design tools that unlock people's creativity. Our flagship app SCRL is a top-ranked design tool for social media content creation, used and loved by millions worldwide. We're a small, ambitious team expanding our platform to the web, and we need a talented Backend Infrastructure Engineer to build the foundation that will power this growth.
You'll be joining our data team to architect and build the backend systems that enable SCRL's expansion to the web, focusing on user accounts, subscription management, and cross-platform data synchronization.
What you will do
Core Infrastructure & APIs
Design and build robust account systems supporting, among others, email/password authentication and cross-platform user management.
Develop and maintain RESTful APIs for user data, project storage, and subscription management.
Implement secure authentication flows across web and mobile platforms.
Build scalable storage solutions for user projects and account data.
Strengthen our content delivery backend that returns templates, stickers and other content to all our platforms (iOS, Android, Web).
Ensure scalability and stability of our backend across all platforms and platform versions.
Support AI service delivery to the apps, such as our template recommendation system to suggest the right templates for our users.
Subscription & Payment Systems
Architect subscription management systems integrating with an external service for web payments.
Implement subscription syncing across iOS, Android, and web platforms.
Build subscription status validation and premium feature access controls.
Develop subscription plan management (upgrades, downgrades, cancellations).
Data Security & Compliance
Implement GDPR-compliant data handling including consent management, data takeout, and deletion requests.
Ensure secure backup systems and data integrity across platforms.
Build audit trails for subscription and account changes.
Maintain data structure consistency across web and mobile platforms.
Platform Integration & Scaling
Develop backend endpoints for mobile app account integration.
Build systems for potential third-party integrations (Instagram connectivity, etc.).
Optimize database performance and query efficiency for millions of users.
Implement monitoring, logging, and error reporting systems.
You should have
Technical Expertise
Backend Languages: Strong proficiency in Javascript, Typescript, React, or similar.
Database Design: Experience with both SQL and NoSQL databases, understanding of data modeling for user accounts and subscriptions.
API Development: Proven experience building RESTful APIs and understanding of API security best practices.
Cloud Infrastructure: Experience with cloud platforms (AWS, GCP, or Azure) and infrastructure as code.
System Design & Architecture
Scalable Systems: Experience building systems that handle millions of users and high-throughput scenarios.
Payment Integration: Knowledge of payment processing, subscription billing, and financial data handling.
Security: Understanding of authentication, authorization, data encryption, and GDPR compliance requirements.
Product & Business Understanding
Subscription Apps: Experience with or strong interest in subscription-based app businesses and freemium models.
Cross-Platform Thinking: Understanding of the complexities of syncing data and subscriptions across web, iOS, and Android.
Data-Driven Approach: Comfortable working with analytics and ensuring proper event tracking for business insights.
Collaboration & Communication
Team Player: Ability to work closely with data engineers, frontend developers, and product teams.
Clear Communication: Can explain complex technical concepts to non-technical team members.
Problem Solving: Self-motivated with strong analytical and debugging skills.
We offer
High Impact Role: Your backend infrastructure will power millions of users' creative projects.
Technical Growth: Opportunity to architect systems from scratch and work with modern technologies.
Startup Environment: Fast-paced decision making with direct impact on product direction.
Strong Team: Work alongside experienced data and engineering professionals in central Stockholm.
Competitive Package: Market-rate salary with opportunities for professional development.
Creative Culture: Be part of a profitable company that values creativity and user experience.
- Locations
- Stockholm

Stockholm
What makes us different
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We work on our own products
We don't do work for hire. We're also completely self-funded (and profitable), giving us the freedom to work on whatever we believe the most in. -
We work on multiple products
We don't stand and fall with one idea. Instead, we operate multiple apps in the photo editing space, and constantly experiment with new, related concepts. -
We work on fun products
We get to combine our creativity with our interest in technology when creating products that are loved and that we can be proud of.
Workplace & culture
We’re a young and growing company, working in-person together in the heart of Stockholm. We believe working together closely and collaborating across all disciplines is key to coming up with fresh ideas and solving difficult problems. We are passionate people that care deeply about our crafts and making products that people love and appreciate. We strive to hear everyone’s voice and creative ideas, and to create an environment where we all can learn and grow professionally.
About Appostrophe
Appostrophe is a Stockholm-based developer of popular mobile applications. We develop our own products—mainly graphic design tools for iOS—and distribute them across millions of users. As a small, self-funded team, we are able to move fast and in the direction we find most promising. With multiple top-listed, fast-growing apps in our portfolio (and more to come!) we're looking to grow our team.