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,

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📌 Full Stack Engineer (Sevilla)
🏢 YunoJuno
📍 Sevilla