Senior .NET SW Developer

Location: Krakow, Lesser Poland, Poland Job ID: R0138856 Date Posted: 2026-07-30 Company Name: HITACHI ENERGY SERVICES SP. Z O.O. Profession (Job Category): Engineering & Science Job Schedule: Full time Remote: No 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. Accessibility and reasonable accommodation Qualified individuals with a disability may request a reasonable accommodation if you are unable or limited in your ability to use or access the Hitachi Energy career site as a result of your disability. You may request reasonable accommodations by completing a general inquiry form on our website. Please include your contact information and specific details about your required accommodation to support you during the job application process. This is solely for job seekers with disabilities requiring accessibility assistance or an accommodation in the job application process. Messages left for other purposes will not receive a response. Use of Al and automated tools in recruitment As part of our recruitment process, Hitachi Energy uses digital and automated tools, including Al-supported solutions, to assist with activities such as application screening, job matching, and interview scheduling. These tools are designed to support our recruiters and do not replace human decision-making. Candidate data is processed in accordance with applicable data protection and employment laws as well as Hitachi's Global Data Privacy Notice. Background Screening and Security Checks As part of the hiring process, Hitachi Energy conducts pre-employment background checks that may include verification of employment history, education, criminal records, and other relevant information, in accordance with applicable laws. For certain roles—particularly those involving access to sensitive information, financial responsibilities, client data, regulated environments, or security-sensitive functions—additional or more comprehensive background or security screenings may be required. These may include, but are not limited to, enhanced criminal history checks, credit history reviews (where legally permissible), sanctions screening, or other due diligence measures aligned with the responsibilities of the position. The scope and depth of any background or security review will be determined based on the nature of the role and business necessity, and will always be conducted in compliance with applicable federal, state, and local laws. Candidates will be notified and, where required, asked to provide consent prior to the initiation of any such checks.