Senior .net SW developer

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

Benefits offered by this job

Private medical care and life保险

Fitness and wellness programs

Benefits platform with discounts

Employee Capital Plans (PPK)

Home office equipment allowances

Spectacles and contact lenses

Company events

Psychological support

Free parking

Job summary

Hitachi Energy Ltd. in Kraków seeks an experienced R&D Software Developer focused on .NET for performance‑critical systems.

You will build high‑performance, secure software with real‑time behavior and long product lifecycles, collaborating with global technology teams to support power grid operations. We value diverse backgrounds; 8+ years in senior technical roles and strong proficiency in C#, REST Web Services, and .NET Core are required, with knowledge of Kubernetes, Docker and system

Qualifications

• University degree in computer science, engineering or related field.
• 8+ years in senior technical roles with .NET stack expertise.
• Advanced proficiency in C#, REST Web Services and .NET Core.
• High code quality via unit tests, Clean Code and SOLID.
• Hands-on with Git, Azure DevOps Pipelines, MSBuild, Docker, Kubernetes, Helm, SQL.
• Knowledge of API development/consumption and Kafka; C++ a plus.
• Experience with performance profiling, low-latency systems, scalable design.
• Familiarity with power grid tech (WAMS/WAMPAC, PMU data) and industrial protocols.
• Strong problem solving, testing methodologies and English proficiency.

Responsibilities

• Design and develop code in .NET technologies for performance‑critical systems.
• Design, develop and maintain microservices backend.
• Participate in code reviews and ensure code quality.
• Troubleshoot and fix issues found during E2E testing.
• Share knowledge and collaborate with team members.
• Propose improvements for code quality, performance and stability.
• Work with Product Owner and QA to ensure successful delivery.

Skills

.NET

C#

REST Web Services

NET Core

Git

Azure DevOps

Docker

Kubernetes

SQL

Kafka

C++

Performance profiling

Security

Power grid knowledge

Education

University degree in CS/Engineering

Tools

MSBuild

Azure DevOps Pipelines

Docker

Kubernetes + Helm

SQL tooling

Job description

The opportunity

We are seeking an experienced R&D Software Developer focused on .NET application development for performance‑critical systems 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 having familiarity with WAMS/WAMPAC, PMU data, and protection and control applications.
• 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 61850, IEC-60870-5-104, DNP3, OPC UA, IEEE C37.118) in plus.
• Practical experience working directly with power grid industry clients and exposure to system integration, simulators, or lab environments.
• Proven ability to translate customer requirements into clear technical designs.
• Solid understanding of numerical methods, signal processing, and control fundamentals and ability to work with high‑frequency, time‑aligned time‑series data
• Good understanding of power system dynamics and the stability challenges introduced by high penetration of renewables
• Effective team player with strong communication skills and willingness to learn.
• 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.

Publication date : 2026-10-09