ProtonCraft is hiring a Mechanical Engineering Intern for 6 months in Pune to design, build and test electrolyser hardware.

Position: Mechanical Engineering Intern

Duration: 6 months

Stipend: ₹15,000 – ₹25,000 per month, based on skills and experience

Location: Pune, Maharashtra (on-site); Pune-based candidates encouraged to apply

Type: Full time internship

About ProtonCraft

ProtonCraft Innovation Pvt Ltd is a deep-tech cleantech startup turning industrial waste gas into clean fuel. Our electrochemical process splits hydrogen sulfide (H₂S), a toxic by-product of refineries, oil & gas and biogas plants, into green hydrogen and elemental sulfur.

We are a small, fast-moving team. Interns work directly on our core hardware, not side projects.

What you'll do

- Create 3D models and assembly drawings of electrolyser cells, stacks and test rigs.
- Run structural, thermal and flow analysis (FEA/CFD) to validate designs before fabrication.
- Prepare manufacturing drawings, tolerances and bills of materials; coordinate with fabricators and vendors.
- Select materials and seals suited to corrosive environments such as H₂S and acidic or alkaline media.
- Assemble, leak-test and commission electrolyser hardware hands-on in the lab.
- Plan and run experiments, record data, and troubleshoot mechanical issues.
- Support field work: site visits, installation and testing of pilot units at industrial sites.
- Document designs, test results and standard operating procedures.

Who should apply





- B.E./B.Tech in Mechanical Engineering: final-year students or recent graduates.
- Working knowledge of at least one CAD tool (SolidWorks, Fusion 360, CATIA, Creo or similar).
- Basic understanding of FEA/CFD tools such as ANSYS or SolidWorks Simulation.
- Comfortable with hands-on work: workshop tools, assembly and fabrication.
- Willing to travel for field work and follow lab safety protocols.
- Available full-time for the entire 6 months.

Good to have

- Project or internship experience with fluid systems, pressure vessels, heat exchangers, fuel cells or electrolysers.
- Knowledge of GD&T; and manufacturing processes such as CNC machining, laser cutting and 3D printing.
- Familiarity with materials for corrosive service: engineering polymers, coatings, stainless steel, titanium.
- Genuine interest in green hydrogen and clean energy.

What you'll gain

- Take electrolyser hardware from CAD model to working prototype.
- Hands-on exposure to green hydrogen technology at an early-stage deep-tech startup.
- Work closely with the R&D; team on real industrial problems.
- Internship certificate on completion.

How to apply

Email your CV to [email protected] with the subject line "Application – Mechanical Engineering Intern". Attach a portfolio of CAD or project work if you have one, and mention your current location and earliest start date.

Pay: ₹15,000.00 - ₹25,000.00 per month

Work Location: In person

📌 Mechanical Engineering Intern – ProtonCraft (Pune)
🏢 ProtonCraft Innovation
📍 Pune