Full-time, Senior, Location: remotely, ±2 hours from EU timezone
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💡 We are looking for a Senior Full-stack Engineer to architect, engineer, and optimize the core infrastructure of our funnel-driven, multi-vertical platform. In this role, you will ensure a robust, secure, and scalable foundation for future growth by developing and integrating advanced MarTech solutions, payment processing systems, and continuously evolving our backend.
Fjor is a consumer health company dedicated to developing an AI-powered nutrition assistant that empowers individuals to maintain and enhance their overall health and well-being while making personal self-care accessible, efficient, and enjoyable. The flagship project of Fjor is the Keto Diet App, an industry-leading iOS application catering to the keto and low-carb market in the USA, which has achieved over $20M in sales, 5M installations, and 500K subscribers since launch.
We are a highly effective, small team of 16 people, with experience from top tech companies such as Uber, Google, Booking.com, Flo, Scentbird, Yandex, Tinkoff, and Alfabank. Our fully remote team operates with a main hub in Amsterdam. We value flexibility, independence, and aim to keep bureaucracy to a minimum. Learn more about our founders, Evgeny Severenkov & Andrew Kopanev.
Responsibilities:
- Develop and Maintain Scalable Systems: Architect secure, scalable backend services using modern frameworks, managing complex codebases for robust performance and scalability.
- Execute Key Deliverables: Deliver engineering increments across payment processing, marketing technology, transactional emails, and backend infrastructure.
- Optimize Payments and Conversion: Design and optimize payment flows, increase approval rates, and implement event-based data pipelines for analytics and funnel performance.
- Integrate Conversion Technologies: Configure conversion tracking systems for attribution and funnel optimization, ensuring accurate event data to improve decision-making and drive measurable growth.
- Ensure Quality: Maintain near-zero critical bugs in production for delivered increments.
Requirements
- Technical Expertise
- Proficiency in JavaScript/TypeScript, including Node.js and Vue.js (SSR, Composition API) and modern backend frameworks.
- Hands-on experience with Google Cloud Platform, serverless applications, and Firebase services.
- Expertise in DevOps practices (CI/CD, GitHub Actions).
- Ownership-Driven Execution
- Extreme bias for action, delivering impactful results in a dynamic environment.
- Takes full ownership of projects and ensures timely delivery.
- Payments and Conversion Tracking Experience
- Experience with PSPs (Stripe, Braintree, other) for subscription billing and dunning flows.
- Proficiency in event-based data pipelines and analytics integrations.
- Knowledge of optimizing conversion tracking (Meta CAPI, Google Ads API, other) and attribution strategies.
- Data-Driven Decision Making
- Strong analytical mindset and the ability to leverage data for improving product performance and scalability.
- Problem-Solving & Collaboration
- Exceptional cross-functional collaboration skills to align product, marketing, and engineering teams.
- A proactive approach to troubleshooting and solving complex problems.
- English Proficiency
- Advanced verbal and written communication skills, equivalent to C1 level or higher.
- AI Tools and Automation
- Proficiency in applying AI tools to accelerate engineering workflows, including AI-assisted code generation for rapid prototyping, debugging, and optimization.
- Experience leveraging AI to automate repetitive tasks, such as refactoring, testing, and deployment.
What We Offer:
- Inspiring Mission: Help users live longer, healthier lives through innovative products.
- Impact: Directly influence company growth with minimal bureaucracy.
- Attractive Compensation: Competitive salary and comprehensive benefits package.