Senior backend developer

2 weeks ago

Stockholm, Stockholm, Sweden FlowCharge Full time

FlowCharge offers an advanced AI-based charge point management system explicitly designed for heavy vehicle charging stations. Our innovative solution monitors and controls charging processes, prioritizing vehicle schedules to ensure optimal efficiency. We are a startup with a remote-first mindset.

Role Description

We're seeking an experienced Senior Backend Developer to build and maintain a robust system for managing electric vehicle (EV) chargers using the OCPP (Open Charge Point Protocol). This contract position is for an initial six months with the possibility of extension.

In this role, you will work on designing and implementing the core components of our charging management system, ensuring that it is reliable, scalable, and secure. You will collaborate with other engineers, product managers, and the operations team to ensure the backend is aligned with the company's technical and business goals.

Responsibilities:

  • OCPP Integration: Design and implement the communication layer using OCPP (preferably version 2.0.1 or 1.6) to connect EV chargers with the central management system.
  • MQTT Integration: Develop a system for connecting and managing multiple devices (e.g., EV chargers) via the MQTT protocol, ensuring reliable messaging and real-time updates.
  • Pub/Sub Messaging: Implement and manage Pub/Sub messaging for distributing events, such as charging status updates, alerts, and logs, to clients and other systems in a scalable manner.
  • Database Design and Management: Develop and manage databases for storing charging session data, user information, device status, and historical logs, ensuring high performance and data integrity.
  • API Development: Design and implement RESTful APIs to provide data and functionality for the front-end (web and mobile) applications. Ensure the APIs are secure, well-documented, and optimized for performance.
  • Security: Implement robust security measures, including encryption (TLS/SSL) for secure communications, authentication (OAuth, JWT), and authorization for different roles (admin, user, device).
  • Testing and Monitoring: Write unit and integration tests for the backend system, set up continuous integration, and implement monitoring and logging to ensure reliability and troubleshoot real-time issues.
  • Collaboration: Work closely with front-end developers, DevOps engineers, and product managers to align product requirements and deliver a seamless, integrated solution.

Required skills and experience:

  • Minimum 6 years of experience in backend development with hands-on experience in Node.js and Python.
  • Experience implementing the OCPP protocol (OCPP 1.6, OCPP 2.0) in backend systems.
  • Real-time communication expertise, including experience with WebSockets for full-duplex communication between servers and clients.
  • Experience with MQTT and Pub/Sub or similar messaging protocols for managing IoT devices, understanding the QoS levels and message routing.
  • Database Design: Proficiency in working with SQL (e.g., PostgreSQL, MySQL) and NoSQL (e.g., MongoDB) databases for structured and unstructured data.
  • API development: Strong experience designing and implementing RESTful APIs and integrating them with various front-end platforms (web, mobile, etc.).
  • Cloud and Deployment: Experience with cloud-based platforms (e.g., AWS, Google Cloud, Azure) for deploying and managing scalable backend services.
  • Version Control: Proficiency with Git for version control and collaboration in a team environment.

Preferred Skills:

  • Experience with OCPP and IoT systems: Experience working specifically with electric vehicle chargers or other IoT devices using the OCPP protocol is a plus.
  • Event-driven architecture: Experience implementing event-driven architectures for handling high-frequency data streams and real-time event broadcasting.
  • DevOps tools: Familiarity with Docker, Kubernetes, CI/CD pipelines, and cloud infrastructure management tools.
  • Monitoring Tools: Experience with system monitoring and logging tools such as Prometheus, Grafana, or ELK stack.

Start ASAP.

Seniority level

Mid-Senior level

Employment type

Contract

Industries

Software Development

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