Process Engineer
Pubblicato il 03-09-2026 - Storage Logic, formerly H2D Energy in Egna
Who we are
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H2D Energy is an innovative start-up headquartered in Cagliari and a pioneer in hybrid energy storage. The historical limitation of renewables is intermittency: we overcome it by integrating batteries, green hydrogen and intelligent control algorithms to turn a discontinuous production into clean, continuous and dispatchable energy, 24 hours a day, 365 days a year.
Our proprietary technology, HyVault, covered by two patent applications, stores the surplus generated by renewable sources and delivers it back whenever needed — hours, days or entire seasons later: batteries cover the short term, hydrogen preserves energy over the long term without losses, and control algorithms orchestrate the whole system moment by moment. It is a scalable platform — from the few kWh of a home up to industrial and grid scale — already operating in the field, and now at the core of an industrial Proof of Concept for the decarbonization of a 350 MW thermoelectric power plant in Brazil.
The context you will work in
You will join our technical team at a time of strong acceleration: in Sardinia, alongside leading industrial and academic partners, we are building a real-world demonstrator of our technology — a photovoltaic plant of over 100 kWp integrated with battery storage systems, an electrolyzer for green hydrogen production and electric vehicle charging infrastructure — governed by a digital twin, control algorithms and artificial intelligence. In this journey, H2D Energy leads the development of the control algorithms for the operational management of the system: you will be at the center of this activity.
What you will do
Develop the process design of the hydrogen chain of our product: electrolysis, gas conditioning (drying, purification),
compression, storage, reconversion, and the associated thermal management.
Size the hybrid storage system as a whole and design its electrical architecture: photovoltaic field, battery bank, electrolyzer and reconversion unit, power conversion and protections, power flows between the sections.
Draw up and maintain the technical basis of the system: mass and energy balances, P&IDs;, equipment sizing, operating and safety parameters, interfaces between the H2 section, batteries and PV.
Define the functional and control requirements of the plant (operating modes, priorities, interlocks, safety-relevant shutdown logic) as the technical input for our algorithm development.
Test and validate the control logic on the system's digital twin and take care of its calibration.
Support the safety analysis of the product: hazardous-area considerations, HAZOP participation, review of gas detection and ventilation concepts.
Specify components and evaluate suppliers from a technical standpoint: requirement lists, datasheet review, technical clarification with manufacturers.
Accompany commissioning and the test campaign on the Sardinian demonstrator: test protocols, measurement evaluation, troubleshooting, feedback into the product design.
What we are looking for
Degree in Energy, Chemical, Mechanical or Electrical Engineering or related fields (Master's degree preferred); talented new graduates are also warmly considered.
Process design skills applied to energy systems: mass and energy balances, P&IDs;, equipment sizing, operating and safety parameters.
Foundations in electrical system design: power conversion (inverters, DC/DC), protections, single-line diagrams, sizing of the DC and AC chains.
Ability to size renewable energy systems (photovoltaics, battery storage, hydrogen) and to integrate them into a single plant.
Modeling and simulation skills (Python and/or Matlab).
A concrete interest in hydrogen, storage systems and renewables.
Fluent English, spoken and written (a must).
Preferred qualifications
Thesis or experience in electrolysis, hydrogen, power-to-X or hybrid storage systems.
Experience with sizing and simulation tools for renewable plants (PVsyst, HOMER, Aspen, Simulink or equivalent).
Practice with P&IDs;, single-line diagrams and CAD tools.
Notions of process safety (ATEX, technical gases, HAZOP) and of the electrical standards applied to PV and storage plants (CEI, IEC).
Optimization and control techniques (e.g. constrained optimization, MPC) and machine learning basics.
1–3 years of experience in plant engineering, energy or process roles.
Knowledge of the Sardinian language.
What we offer
A central role in the development of the algorithms governing a proprietary technology, covered by two patent applications, with a declared ambition of international leadership in hybrid storage.
Fast growth and real responsibilities in an expanding start-up: those who join today help build tomorrow's company.
Hands-on training on hybrid storage, green hydrogen and control systems, working with high-profile industrial and academic partners.
Place of work: Cagliari. xrdbqlu
How to apply
Send your CV to with the subject line "Application – Junior Process Engineer".