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Senior Software Engineer (React/Node.js)

Zartis
Remote
Full Time
Posted January 28, 2026
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Job Description

A Senior Software Engineer responsible for developing and maintaining the energy retail platform's billing system using React, Node.js, and cloud technologies, contributing to sustainable energy solutions within a collaborative and innovative team environment.

Key Responsibilities

  • Develop, design, support, and test features for the Energy Retail platform's Billing team.
  • Build and maintain frontend applications using React.
  • Implement backend functionalities using TypeScript and Node.js.
  • Collaborate with team members to ensure accurate, compliant, and timely billing processes.
  • Contribute to software delivery within agile development teams.
  • Create and execute unit and integration tests to ensure software quality.
  • Work with cloud platforms, preferably AWS, and infrastructure as code tools like Terraform.
  • Engage with event-driven systems and message queues such as Kafka or SQS.
  • Provide guidance and mentorship to team members with varying technical skill levels.
  • Maintain support processes and observability to ensure system reliability.

Requirements

  • Strong proficiency in TypeScript and Node.js.
  • Experience building and maintaining frontend applications with React.
  • Familiarity with cloud platforms, ideally AWS.
  • Some experience or exposure to event-driven systems or message queues e.g. Kafka, SQS.
  • Solid experience with CI pipelines, SQL, and Infrastructure as Code e.g., Terraform.
  • Experience in software delivery within agile teams.
  • Strong knowledge of test approaches and experience in creating unit and integration tests as part of the development cycle.
  • A quality-focused mindset with strong analytical problem-solving skills.
  • Ability to work collaboratively with a range of technical skill levels in the team, providing guidance and mentorship as needed.
  • Thorough understanding of support processes and observability.

Benefits & Perks

100% Remote Work
Monthly WFH allowance
Career development program with 360º feedback
Time allocated during the week for tech training (online courses, books, conferences, events)
Mentoring program (opportunities to be a mentor or mentee)
Access to Zartis Wellbeing Hub and Kara Connect platform with sessions with specialists
Flexible working schedule
Participation in multicultural team events, webinars, parties, and online team-building activities

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