Medior Power Systems Software Developer/Engineer (Java/Python)

Company Overview

RTE International is a global consulting and engineering firm specializing in power system operations, digital platforms, and advanced technical solutions for Transmission System Operators (TSOs) and international energy players. 

The Digital Service Line (DIG) develops next-generation digital, software and virtualization solutions (VPAC, SEAPATH, digital substation, model-based engineering). 

SEE (Serbia) acts as an engineering, integration and delivery center supporting all RTE International service lines. 

1. Context

RTE International strengthens its software development activities for power system analysis tools (load-flow, short-circuit, dynamic studies, grid modelling). 

RTEi SEE (Serbia) recruits a Medior Power Systems Software Developer to reinforce DIG software and R&D projects, in a matrix organization: 

• Operational reporting to DIG project leads 
• Local reporting to the SEE manager 
• Reference: iGG7bDAiOM8R9wetYNEpK6URRVdrdP7xgangwfhZd7O5oUpDqifp8EQX-CKuejAf

2. Purpose of the Role

Delivers with autonomy; owns functional modules and bridges power system engineering and software design. 

The role is designed for early-career engineers with solid fundamentals in power systems and strong motivation to develop industrial-grade software skills. 

3. Main Responsibilities 

3.1. Power System Modelling Support 

Implement basic power system models: 

• Buses, lines, transformers, generators, loads 
• Electrical parameters and constraints 

Support implementation of algorithms for: 

• Load-flow 
• Short-circuit (basic use cases) 
• Simple contingency handling 

Validate results against reference cases. 

3.2. Software Development 

• Develops autonomously. 
• Designs APIs and modular components. 
• Writes unit, integration and non-regression tests. 
• Active contributor and reviewer in code reviews. 

3.3. Integration & Tooling

• Defines and maintains IO contracts. 
• Integrates modules into larger platforms. 
• Contributes to performance optimisation and architectural choices. 
• Use Git workflows (branching, pull requests). 
• Participate in code reviews. 

3.4. Learning & R&D Exposure 

• Learn internal frameworks (PowSyBl ecosystem, internal tools). 
• Participate in R&D or prototyping tasks. 
• Gradually build autonomy on a limited functional scope. 

4. Key Skills 

Technical

Strong fundamentals in power systems engineering: 

• Load-flow 
• Short-circuit calculations 
• Network modelling 

Solid experience in Java and/or Python. 

Good understanding of: 

• Software architecture principles 
• Testing strategies 
• Numerical stability and performance 
• Comfortable with Linux, Git, CI pipelines. 

Organizational & Interpersonal 

• Autonomous and reliable. 
• Able to challenge specifications constructively. 
• Clear technical communication. 

5. Profile 

2–5 years experience in: 

• Power system software 
• Engineering tools 
• Scientific or numerical software development
• Degree in Electrical Engineering, Power Systems, Computer Science or equivalent. 
• Experience with PowSyBl, Antares or similar tools is a strong plus. 
• Professional English required. 
• Based in Serbia (SEE). 

6. KPIs 

• Functional ownership of assigned modules. 
• Quality and robustness of delivered software. 
• Test coverage and non-regression stability. 
• Contribution to technical decisions. 
• Mentoring feedback from juniors. 

7. Career Path

Target evolution toward: 

• Senior Power Systems Software Developer 
• Technical expert on specific simulation domains  

8. What we offer — RTEi SEE (Serbia Office) 

Working at RTE International SEE means joining a technical environment committed to excellence, openness, and team spirit. As part of our team, you benefit from: 

• Competitive salary package, defined in EUR and paid monthly in RSD, based on the official exchange rate on the payroll date, with full transparency (monthly payroll statement). 
• Annual bonus scheme, based on individual contribution, company performance, and RTEi group results. 
• 27 days of annual leave, with additional days based on experience, education level, or outstanding performance. 
• Home-office cost coverage (electricity, water, internet) when remote work is contractually agreed. 
• Paid leave for key personal events (marriage, childbirth, serious illness in close family, bereavement, blood donation, etc.). 
• Business travel support: transportation, accommodation, meals reimbursed; daily allowances (30 EUR/day in Europe, 50 EUR/day outside Europe); full safety protocols; support line 24/7; optional additional travel insurance. 
• Employer-provided equipment for remote or on-site work. 
• Private health insurance.

…and additional statutory benefits as per company policy, including pension-related provisions, severance, and safety/health protections applicable in Serbia.