Freelance Senior Back End Developer jobs in United States
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innoscripta AG · 19 hours ago

Freelance Senior Back End Developer

Innoscripta AG is a fast-growing technology consultancy and the #1 technical innovation consultancy for medium-sized companies in Germany. They are seeking a Senior Back End Developer to design, develop, and maintain scalable backend services and APIs, while ensuring high code quality and performance improvements.

Financial ServicesFinTechInformation TechnologyManagement Consulting

Responsibilities

Design, develop, and maintain scalable backend services and APIs
Work with Python and JavaScript-based backends (Node.js), while remaining open to other languages and technologies
Design and implement RESTful APIs and integrate internal and external services
Contribute to system architecture, scalability, and performance improvements
Work with relational databases (e.g. PostgreSQL, MySQL) and optimize queries and data models
Ensure high code quality, security best practices, and maintainable systems

Qualification

Backend engineeringPythonJavaScript (Node.js)RESTful APIsRelational databasesMicroservice architecturesGolangAPI designData modelingAuthentication & authorizationPerformanceScalabilityAI-related systemsData pipelinesAI-driven features

Required

Strong backend engineering experience (minimum 5-6 years), independent of a specific language or framework
Proficiency in Python and/or JavaScript (Node.js)
Solid understanding of backend fundamentals: API design, Data modeling, Authentication & authorization, Performance and scalability
Experience working with relational databases and complex business logic
Experience with microservice architectures
Experience with Golang
Exposure to AI-related systems, data pipelines, or AI-driven features

Company

innoscripta AG

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Die innoscripta AG ist ein stark wachsendes internationales Softwareunternehmen im Bereich der Technologieförderung, das sich auf die cloudbasierte Software für Forschung und Entwicklung spezialisiert hat.

Funding

Current Stage
Public Company
Total Funding
unknown
2025-05-23IPO
Company data provided by crunchbase