Senior .NET SW Developer

Hitachi, Ltd.; Kraków; On-site; PLN 180,000 - 300,000; Full time

Benefits offered by this job

Private medical care

Life insurance

Wellness programs

Discount platform

PPK

Home office equipment

Eyewear allowance

Company events

Mental health support

Free parking

Job summary

Hitachi, Ltd. Kraków is seeking an experienced R&D Software Developer focused on .NET application development to design, build, and maintain high-performance, real-time software systems for power grid solutions.

You will work with global teams to deliver secure, scalable back-end services, implement microservices with Docker/Kubernetes, and ensure long product lifecycles through robust testing and code quality practices.

Qualifications

• 8+ years of experience in senior technical roles.
• Advanced proficiency in the .NET stack: C#, REST Web Services & .NET Core.
• Strong focus on unit/integration testing and clean code practices.
• Hands-on with Git, build systems, containerization (Docker/Podman) and orchestration (Kubernetes/Helm).
• Experience with SQL databases; beneficial knowledge of Kafka, C++ and power grid domain.

Responsibilities

• Design and develop high-performance, secure .NET applications.
• Design, develop and maintain microservices architecture for back-end.
• Participate in code review.
• Troubleshooting and bug fixing for issues from E2E testing.
• Share knowledge with team members and improve code quality, performance and stability.
• Collaborate with Product Owner and QA to ensure successful delivery.

Skills

C#

REST Web Services

.NET Core

API Development

Unit Testing

Distributed Systems

English communication

Low-latency systems

Problem-solving

Power grid domain knowledge

Education

Bachelor's degree in computer science or engineering

Tools

Git

Azure DevOps Pipelines

MSBuild

Docker

Podman

Kubernetes

Helm

SQL

Kafka

C++

Job description

The opportunity

We are seeking an experienced R&D Software Developer focused on .NET application development to join our technology organization.

In this role, you will develop, high-performance, and secure software systems built with .NET technology, with a strong focus on real-time behavior, reliability, and long product lifecycle support.

As an R&D Software Developer within the Grid Automation domain, you will help shape innovative solutions for the power systems of tomorrow.

You will work closely with global technology teams that bring niche expertise and cutting-edge capabilities. Your work will directly support the development of real-time software used in critical infrastructure worldwide software designed for long-term reliability, high efficiency, and uncompromising security.

We value diverse experience and fresh perspectives. Even if you do not meet every listed requirement, we encourage you to apply. We are excited to learn more about you and the unique strengths you can bring to our team.

How you’ll make an impact:

• Achieve business goals through designing and developing code in the .NET technologies.
• Design, develop and maintain microservices architecture for back-end.
• Participate in code review.
• Troubleshooting and bug fixing for all issues discovered during E2E testing
• Share your experience and skills with other team members.
• Proposing and elaborating with other team members on how to improve code quality, performance and stability.
• Work closely with Product Owner, QA engineers to ensure successful project delivery

Your Background:

• University degree in computer science, engineering, or a related technical field.
• 8+ years of experience in senior technical roles.
• Advanced proficiency in .NET technology stack: C#, REST Web Services and .NET Core.
• Assure high code quality through unit tests and adherence to software development best practices like Clean Code, SOLID, and code reviews.
• Hands on knowledge in following areas:
  • Git version control system
  • Build management - Azure DevOps Pipelines, MSBuild,
  • Docker / podman
  • Kubernetes + Helm
  • SQL database knowledge
• Demonstrate understanding of the concepts API Development and Consumption.
• Practical knowledge of Kafka and C++ development in plus.
• Demonstrated experience with performance profiling, optimization, and low-latency systems.
• Understanding of software architecture principles and secure, scalable system design.
• Excellent problem-solving skills and the ability to tackle complex technical challenges.
• Good understanding of unit and integration testing techniques and testing frameworks.
• Knowledge of non-functional requirements (performance, scalability, security).
• Practical experience developing systems for power grid management and monitoring.
• Understanding of power grid operations and applicable standards.
• Experience with industrial automation systems (SCADA, IED, RTU) in plus.
• Experience with industrial protocols and standards (IEC-60870-5-104, DNP3, OPC UA, IEEE C37.118) in plus.
• Practical experience working directly with power grid industry clients.
• Proven ability to translate customer requirements into clear technical designs.
• Excellent command of English (written and spoken).

More about us

We pride ourselves on offering a holistic range of competitive benefits to support your financial, physical and mental wellbeing and personal development. We want you to truly thrive with us, in work and out.

We can provide more information during the recruitment process.

Our benefits offering for this role generally includes:

• Private medical care and life insurance
• Access to fitness and wellness programs
• Access to benefits platform with discounts and perks
• Employee Capital Plans (PPK)
• Equipment for working from home or allowances for setting up a workplace at home
• Spectacles and contact lenses allowance
• Company events and team‑building activities
• Psychological support program
• Free parking available

You will receive more specific information during the recruitment process.