Freelance Full-Stack Node.js Developer – EV Charging Platform

Freelance | Fully Remote | Part-time | Ongoing contract | Start 31st October (versátil)

We’re looking for an experienced Full-Stack Node.js Developer to provide ongoing technical support, maintenance and security improvements for an established EV charging platform.

The platform is currently hosted on DigitalOcean, using CitrineOS and Hasura, and supports a small but operational network of approximately 30 EV chargers.

This is a hands-on role for someone comfortable taking ownership of an existing application, troubleshooting technical issues, managing updates and ensuring the platform remains secure, stable and reliable.

The initial requirement is relatively light-touch, with ad hoc support as needed, but there is potential for the project to grow as the charging network expands.

What you'll be doing:

- Maintaining and supporting an existing EV charging platform built using Node.js technologies
- Managing and troubleshooting the platform's DigitalOcean hosting environment
- Supporting the existing CitrineOS interface and Hasura database infrastructure
- Identifying, diagnosing and resolving bugs, technical issues and performance problems
- Implementing security updates, patches and improvements to protect the platform
- Maintaining and optimising back-end services,



APIs and database integrations
- Supporting software updates, upgrades and ongoing platform improvements
- Reviewing the existing technical infrastructure and recommending improvements to reliability, security and scalability
- Providing occasional technical support as required, with potential to support future platform expansion

What you’ll bring:

- Proven experience maintaining, troubleshooting and improving existing production applications
- Experience working with cloud hosting environments, ideally DigitalOcean
- Knowledge of Hasura, GraphQL and database management
- Strong understanding of API integrations and back-end infrastructure
- Experience implementing application security, vulnerability fixes and software updates
- Ability to independently investigate and resolve technical issues
- Understanding of cloud infrastructure, deployment processes and application monitoring
- Experience working with existing codebases and taking ownership of ongoing technical maintenance
- Ideally, familiarity with CitrineOS, OCPP protocols or EV charging infrastructure

If you're a Full-Stack Node.js Developer who enjoys maintaining and improving existing platforms, solving technical challenges and supporting innovative technology in the EV charging sector,

📌 Full Stack Engineer (España)
🏢 YunoJuno
📍 España