Senior Backend Engineer - Cloud Platform for Grid Batteries

Capalo AI Oy; Finland; Hybrid; EUR 90,000 - 130,000; Full time

Job summary

Capalo AI Oy is building the cloud platform behind Europe’s grid-scale batteries. We seek a Senior Backend Engineer to own backend architecture for Capalo Zeus VPP, interfacing with battery assets and market operators across Europe.

You will design scalable services, implement APIs, and drive production reliability in a hybrid Helsinki/Kuusamo environment. You’ll work on cloud-native AWS infrastructure, event-driven processing, and robust data pipelines to forecast, optimize, bid, and dispatch

Qualifications

• Significant experience building production backend systems where reliability and correctness matter.
• Strong hands-on Python and modern backend engineering, including APIs and asynchronous processing.
• Experience designing production systems, including service boundaries, APIs, failure handling, and ownership.
• Production experience with AWS or another major cloud platform.
• Comfort working across backend engineering, 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 data quality, traceability, and safe production deployment.
• Improve observability, failure handling, incident response, and reliability of 24/7 production services.
• Contribute to architecture reviews, Infrastructure as Code (Terraform), CI/CD, and mentoring other engineers.

Skills

Python

APIs

Asynchronous processing

Event-driven architectures

AWS

Tools

Terraform

MQTT

IEC-104

Job description

Capalo AI Oy is building the cloud platform behind Europe’s grid-scale batteries. We seek a Senior Backend Engineer to own backend architecture for Capalo Zeus VPP, interfacing with battery assets and market operators across Europe.

You will design scalable services, implement APIs, and drive production reliability in a hybrid Helsinki/Kuusamo environment. You’ll work on cloud-native AWS infrastructure, event-driven processing, and robust data pipelines to forecast, optimize, bid, and dispatch