Senior Software Engineer

Cuculus GmbH

Location: Erfurt
Work arrangement: On-site
Job type: Full-time
Posted today

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Key skills in this ad

Skills and tools

APIs
Testing
DevOps
CI/CD
Observability
ISO 27001
Java
Kotlin
Kafka
PostgreSQL
Kubernetes

Languages

English

Qualifications

University degree
relevant degree

Picked out automatically from the employer's ad. Read the full description before applying.

About this role

Shape the utilities market of the future with us!

Permanent / Full-time / On site in Ilmenau, Erfurt or Leipzig (3 days per week) / Start ASAP

What is the role about?

As a Senior Software Engineer in our Meter Data Management (MDM) team, you will combine hands-on software development with technical ownership for a performance-critical product.

MDM covers the collection, validation, processing, and management of energy meter data. Our software processes large data volumes and supports critical customer and operational processes within the ZONOS ecosystem.

You will provide technical direction within the team, guide solution design, coordinate technical dependencies, and help establish high standards for performance, quality, security, and reliable delivery. This is a technical leadership role without disciplinary people-management responsibility.

You will also contribute to migrations between customer systems, ensuring reliable data transfer, validation, integration, and system transition.

Your Role at a Glance

Provide technical direction and guide decisions from requirements through reliable delivery.

Own solution design, APIs, integrations, data flows, non-functional requirements, and technical risks within the team’s scope.

Develop and improve scalable software for high-volume, performance-critical data processing.

Guide migrations between customer systems, including data transfer, validation, reconciliation, and cutover activities.

Coordinate technical dependencies between Product, Platform, Operations, QA, DevOps, Security, and Architecture.

Facilitate design discussions, code reviews, technical workshops, and Architecture Decision Records.

Define and promote standards for performance, data quality, testing, maintainability, and operational reliability.

Support profiling, benchmarking, load testing, monitoring, and performance optimisation.

Contribute to backlog refinement, technical estimation, feasibility assessments, and release readiness.

Support CI/CD, observability, secure development, and ISO 27001 requirements.

Coach and support engineers through knowledge sharing, onboarding, mentoring, and constructive technical feedback.

Evaluate suitable agentic AI and AI-assisted engineering solutions while maintaining security and quality standards.

Must-haves (to thrive in this role)

University degree in Computer Science, Software Engineering, Information Technology or a comparable discipline.

Several years of hands-on software development experience with technical ownership in a product or complex software environment.

Strong professional experience with Java and/or Kotlin.

Strong knowledge of software design, APIs, integrations, data processing, distributed systems, and Kafka-based event-driven architectures.

Practical experience with PostgreSQL and/or Oracle databases.

Experience with scalable or performance-critical software and large-volume data processing.

Experience with migrations between customer systems or complex software environments.

Ability to structure incomplete requirements, evaluate trade-offs, and guide technical decisions, including the responsible use of AI-assisted or agentic AI approaches.

Experience with technical design, code reviews, testing, performance optimisation, and reliable delivery.

Strong communication skills and the ability to align different technical contributors.

Professional English; German is an advantage.

Additional relevant degree or vocational qualification is welcome; equivalent practical experience is equally valued.

Nice-to-haves (great if you have them, but not a dealbreaker)

Experience with Kubernetes or OpenShift in production environments.

Experience with gRPC-based service communication.

Experience in smart metering, energy, utilities, Meter Data Management (MDM), or Head-End Systems.

Experience with specialised data migration tools and reconciliation processes.

Experience with documenting technical decisions using Architecture Decision Records (ADRs).

What You Bring to the Team

You will shape the technical direction of a product where performance, data quality, and reliability genuinely matter. You will influence architecture and delivery, support complex customer migrations, and help engineers grow through technical guidance and collaboration.

The role offers technical leadership and visible ownership without disciplinary management responsibility.

Why us?

We at Cuculus believe that work should be meaningful, fun, and enable growth. When you join us, you can expect an environment that trusts you, values collaboration, and gives you the freedom to take ownership.

Hybrid working: With regular office presence (3 days per week in Ilmenau, Erfurt or Leipzig).

Flexibility: Flexible working hours & workation option (up to 4 weeks per year).

Mobility: 50% subsidy for the Germany ticket and bike leasing.

Security: Company pension scheme and capital-forming benefits.

Culture: Short decision-making paths, open feedback culture and genuine trust.

Onboarding: A structured onboarding plan and a buddy to support you from day one.

Office Life: We enjoy spending time together in our offices - whether for a coffee, a shared lunch or a spontaneous after-work get-together.

Impact: Meaningful work - software that shapes the energy market of tomorrow.

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