Holycode

Backend Engineer

• Design, develop, and maintain scalable backend applications using TypeScript and Node.js
• Build high-performance RESTful APIs and backend services
• Design and optimize relational and NoSQL database models
• Use AI-assisted development tools (such as Claude Code, Codex, Gemini, or similar) as an integral part of the software development lifecycle, including implementation, testing, debugging, and code reviews
• Develop clean, maintainable, and well-tested code following best engineering practices
• Collaborate closely with frontend developers, product managers, QA engineers, and other cross-functional team members
• Participate in architectural discussions and contribute to technical decision-making
• Optimize application performance, scalability, and security
• Integrate third-party services and APIs
• Write and maintain technical documentation
• Perform code reviews and mentor other developers when needed
• Stay up to date with emerging backend technologies, frameworks, and engineering best practices
• Work in an agile environment with a strong focus on delivering high-quality software

Senior Backend Developer, TypeScript, Node.js

• Design, develop, and maintain scalable backend applications using Python
• Build high-performance RESTful APIs and backend services
• Design and optimize relational and NoSQL database models
• Use AI-assisted development tools (such as Claude Code, Codex, Gemini, or similar) as an integral part of the software development lifecycle, including implementation, testing, debugging, and code reviews
• Develop clean, maintainable, and well-tested code following best engineering practices
• Collaborate closely with frontend developers, product managers, QA engineers, and other cross-functional team members
• Participate in architectural discussions and contribute to technical decision-making
• Optimize application performance, scalability, and security
• Integrate third-party services and APIs
• Write and maintain technical documentation
• Perform code reviews and mentor other developers when needed
• Stay up to date with emerging backend technologies, frameworks, and engineering best practices
• Work in an agile environment with a strong focus on delivering high-quality software

Senior Backend Developer, Python

Data Engineer

• Design, build and maintain robust data pipelines (ETL/ELT) for structured and unstructured data
• Develop and operate data solutions in the Microsoft Azure environment, using Databricks and/or Microsoft Fabric
• Use Python and SQL (and frameworks such as PySpark) for data processing, transformation and automation
• Contribute to data integration, data modeling, data quality and data provisioning across projects
• Work with modern data architecture concepts such as Lakehouse and Medallion architectures
• Collaborate with colleagues and clients to translate requirements into clean, maintainable technical solutions

Consultant

• End-to-end responsibility for customer projects involving Microsoft Business Central (BC)
• Participation in the planning and implementation of migration projects, new implementations, or extensions of existing systems, as well as providing support to the respective customers
• Close collaboration with our development team in Serbia and your BC consultant colleagues in Switzerland and Serbia
• Significant freedom to shape how you work with customers

Senior Backend Developer, TypeScript, Node.js

Senior Backend Developer, Python

Data Engineer

ERP Consultant – Microsoft Business Central (BC)