Full Stack Engineer

About Calyp

Calyp is an innovative early-stage deep technology startup with offices in Germany and India, focused on creating intelligent context-aware systems. By utilizing machine learning, Calyp's platform analyzes environmental audio to extract meaningful contextual insights that enhance wearable devices, biosignal systems, and other relevant applications.

Role Overview

We seek an experienced Full Stack Engineer with over two years in software development for production-grade web applications. This role demands comprehensive ownership of our web platform and backend infrastructure. The engineer will engage across the entire stack—from front-end user interfaces and backend services to database design, API creation, security protocols, and deployment processes. The goal is to evolve our existing product into a dependable, scalable platform capable of supporting increasing usage, external integrations, and expanded product functionalities.

This opportunity extends beyond simply implementing UI or fixing bugs. The ideal candidate will grasp the broader technical roadmap, make strategic engineering decisions, anticipate potential challenges, and develop secure, maintainable, and growth-ready systems. You will collaborate directly with the founding team, significantly influence architectural direction, and hold substantial responsibility in product technology strategy.

Key Responsibilities

• Develop, sustain, and enhance responsive web applications using modern frontend frameworks, specifically employing TypeScript.
• Create robust backend services, manage business logic, and design asynchronous processing workflows.
• Architect clean, modular, and maintainable software systems that can accommodate future expansions.
• Enhance application performance, stability, error management, and user experience.
• Design and maintain scalable backend services, database schemas, queries, and data models, particularly with PostgreSQL and Supabase or similar technologies.
• Implement authentication systems, role-based access controls, and authorization mechanisms.
• Diagnose and optimize performance bottlenecks within database queries, APIs, and backend operations.
• Design, develop, document, and maintain RESTful APIs and suitable integration interfaces.
• Develop developer-friendly APIs and SDKs to enable external software integration, creating comprehensive documentation and integration examples for developers and research collaborators.
• Ensure secure authentication, authorization, input validations, and secrets management are in place.
• Support privacy-conscious system architecture aligned with data protection laws, including GDPR compliance where applicable.
• Contribute to tasks related to model-serving, inference optimization, or data processing as needed.
• Produce clean, testable, and maintainable code while actively participating in code reviews.

Required Qualifications & Experience

• Minimum of two years professional experience in software development, focused on building and delivering web applications or software platforms.
• Strong command of JavaScript and TypeScript, with practical experience using React or comparable modern frontend frameworks.
• Proven backend development skills using Node.js or equivalent backend technologies.
• Experience designing and consuming RESTful APIs.
• Hands-on development of APIs or SDKs for external developers or third-party integrations.
• Sound knowledge of relational databases, SQL, data modeling, with hands-on experience in PostgreSQL or comparable systems.
• Advanced understanding of software architecture principles, focusing on scalability, performance, and maintainability.
• Some practical experience with Python, machine learning workflows, or embedding ML models within applications.
• Strong communication and teamwork skills suited for a compact, agile team setup.
• Experience in machine learning/deep learning activities such as model training, fine-tuning, or evaluation is a significant advantage.

What You Will Gain

• Ownership of vital technology components within a pioneering deeptech startup.
• The chance to shape architecture and technical choices from the earliest stages of product development.
• Direct partnership and collaboration with the founding team across software, machine learning, and hardware domains.
• Opportunity to develop impactful real-world technologies for wearables, biosignal systems, and context-aware applications.