Senior Product Design & Development Engineer

Company: Carbelim Private Limited

Location: Coimbatore, Tamil Nadu

Employment: Full-time

Experience: Preferably 4–8 years in physical product development

About CarbelimCarbelim is an IIT Madras incubated and invested deep climate-tech startup developing microalgae-based carbon capture, air purification and environmental monitoring solutions for homes, offices, industries and public infrastructure.

Role OverviewWe are looking for a hands-on product designer and mechanical engineer who can own development from initial concept to production-ready design.

The portfolio includes standalone air purifiers, AC/HVAC-integrated purification modules, home and office appliances, industrial air-treatment systems, and handheld air-quality monitoring devices.

Our development approach is concept → CAD → 3D-printed prototype → functional testing → design refinement → tooling/mould development → pilot production.

Key Responsibilities

• Translate product requirements into practical concepts, sketches, industrial designs and detailed 3D CAD models.
• Design product appearance, enclosures, internal layouts, mounting arrangements and service access.
• Integrate fans, filters, sensors, electronics, displays, wiring and microalgae modules where applicable.
• Develop airflow paths, ducting, sealing and filter arrangements, considering pressure drop, noise, vibration and thermal management.
• Design purification modules for integration with AC/HVAC equipment, coordinating with refrigeration and electrical specialists.
• Prepare designs for 3D printing; coordinate prototype fabrication, assembly and fit checks.
• Build and refine functional prototypes with Carbelim’s electronics, biotechnology and engineering teams.
• Plan and document testing for airflow, assembly, usability, leakage, noise and maintainability.
• Select suitable materials and manufacturing processes, including injection moulding, sheet metal, extrusion and machining.
• Prepare mould-ready designs with appropriate wall thickness, draft angles, ribs, bosses, tolerances and parting considerations.
• Coordinate with mould makers and manufacturing vendors on tooling feasibility, quotations, trials and corrections.
• Create engineering drawings, bills of materials, assembly instructions and controlled design revisions.
• Support pilot production and resolve manufacturing issues through production handover.

Required Skills & Experience

• Degree in Mechanical Engineering, Industrial Design, Product Design or a related discipline.
• Strong proficiency in SolidWorks, Creo, Fusion 360, CATIA or equivalent 3D CAD software.
• Proven experience developing physical products beyond visual renders.
• Hands-on experience with 3D printing, prototype assembly and design iteration.
• Knowledge of plastic enclosure design, injection moulding, sheet-metal fabrication and design for manufacturing and assembly.
• Ability to produce detailed drawings, tolerance specifications and bills of materials.
• Experience coordinating with tooling suppliers, fabricators and component vendors.
• Strong understanding of ergonomics, assembly, durability and serviceability.

Preferred Experience

• Air purifiers, HVAC products, home appliances, environmental instruments or industrial equipment.
• Fan selection, filtration systems, airflow analysis and acoustic optimisation.
• Integration of mechanical assemblies with electronic controls and sensors.
• Products involving liquids, pumps, tubing, seals or leak-resistant enclosures.
• Taking at least one product through tooling and pilot or commercial production.

Expected Initial Deliverables

• Product requirements and concept options for the first assigned device.
• Complete CAD assembly and preliminary bill of materials.
• A 3D-printed enclosure prototype for form, fit and assembly validation.
• A functional prototype and documented design improvements.
• A manufacturing-ready design package following prototype validation.

Tooling and final mould development will proceed after prototype testing and design approval.

Candidate ProfileYou should be comfortable working in a startup environment, building prototypes personally, resolving engineering issues and coordinating specialist inputs. We need someone who combines strong product aesthetics with practical manufacturing knowledge.

How to ApplySend your CV and portfolio to mail@carbelim.io.

Subject: Application – Product Design & Development Engineer

Please submit 2–3 relevant projects demonstrating your contribution to CAD design, prototyping, tooling and manufacturing. Clearly indicate which products reached the physical prototype or production stage.

Compensation: ₹8–12 lakh annual CTC, based on experience, portfolio and demonstrated concept-to-manufacturing capability.

Please apply only if you have relevant hands-on experience and a strong portfolio of physical products you have helped develop.

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