Senior Backend Engineer – Cloud Infra for Grid Batteries

Capalo AI Oy; Helsinki; Hybrid; EUR 90,000 - 140,000; Full time

Job summary

Capalo AI Oy in Helsinki, Finland, is hiring a Senior Backend Engineer to build the cloud platform behind Zeus VPP, Capalo's virtual power plant. You’ll own backend systems, influence architecture, and ship production-ready services that forecast, optimize, and dispatch grid-scale batteries across Europe.

This role blends software, cloud infrastructure, and energy domain challenges, requiring strong Python, AWS experience, and a track record of reliable, observable systems.

Qualifications

• Significant experience building and operating production backend systems.
• Strong hands-on Python and modern backend engineering, including APIs and asynchronous processing.
• Experience designing production systems with APIs, failure handling, and operational ownership.
• Production experience with AWS or another major cloud platform.
• Comfort working across backend, infrastructure, data, and domain logic in ambiguous environments.

Responsibilities

• Design and build backend services for asset monitoring, schedule generation, command delivery, and battery dispatch.
• Develop integrations with asset-side systems and market interfaces using REST APIs, MQTT, and IEC-104.
• Build cloud-native infrastructure on AWS, including event-driven services, storage layers, deployment tooling, and operational foundations.
• Develop the backend foundations that support forecasting and optimization pipelines, with focus on data quality and traceability.
• Improve observability, failure handling, incident response, and the reliability of 24/7 production services.
• Contribute to engineering standards through architecture reviews, Infrastructure as Code (Terraform), CI/CD, and mentoring other engineers.

Skills

Python

Backend engineering

APIs

Asynchronous processing

Event-driven architecture

AWS

Tools

Terraform

MQTT

IEC-104

Job description

Capalo AI Oy in Helsinki, Finland, is hiring a Senior Backend Engineer to build the cloud platform behind Zeus VPP, Capalo's virtual power plant. You’ll own backend systems, influence architecture, and ship production-ready services that forecast, optimize, and dispatch grid-scale batteries across Europe.

This role blends software, cloud infrastructure, and energy domain challenges, requiring strong Python, AWS experience, and a track record of reliable, observable systems.