Mechanical Design Engineer

About the role

Join our product engineering team as a Mechanical Design Engineer to develop and improve modules of current products and contribute to the development and production of new products. This role includes CAD design, kinematics simulations, prototyping, validation, and moving designs into production.

What you will be doing?

• Design and develop product modules and subsystems.
• Understand design constraints and failure modes across subsystems.
• Develop CAD models and run static/dynamic and kinematic simulations.
• Prepare CAD drawings for prototyping vendors and manufacturing partners.
• Oversee prototype fabrication, testing, and debugging to production readiness.
• Visit vendor sites to review production processes and quality requirements.
• Conduct and oversee EVT, DVT, and PVT, including mechanical reliability tests.

What you'll need to bring to the table?

• Pursuing or completed B.Tech/B.E./M.Tech in Mechanical Engineering (or equivalent).
• Strong fundamentals in machine design, mechanics of solids, and dynamics.
• Proficiency in CAD tools such as SolidWorks or Autodesk Fusion.
• Working knowledge of CAE/FEM tools such as AnSYS, SolidWorks, or Fusion 360.
• Understanding of engineering materials, material selection, and manufacturing processes.
• Knowledge of injection moulding, mould design, and mould flow analysis.
• Strong analytical skills, communication, and ownership mindset.

Good to have:

• Hands-on exposure through SAE, robotics, or collegiate technical clubs.
• Experience coordinating with vendors for prototyping and production.

Mechanical Production Engineer Intern

About the role

Thinkerbell Labs is offering a hands-on internship experience for a Mechanical Production Engineer Intern. In this role, you will work at the heart of our manufacturing efforts, ensuring smooth production of Annie and upcoming products while supporting design refinements and prototyping.

What will you be doing?

If you're hired for this role, you will be taking up the following responsibilities among others:

• Oversee production of mechanical components with high quality and on-time delivery.
• Coordinate with vendors and review production processes at manufacturing sites.
• Optimize manufacturing workflows for better efficiency and reduced lead times.
• Implement quality checks and conduct failure analysis with root cause analysis.
• Support prototyping and validation for new modules before full-scale production.
• Prepare CAD drawings for prototyping and manufacturing partners.
• Contribute to DFM/DFA feedback and product verification and validation activities.

What you'll need to bring to the table:

• Pursuing or completed B.Tech/B.E./M.Tech in Mechanical Engineering (or equivalent).
• Strong understanding of manufacturing processes, engineering materials, and material selection.
• Working knowledge of machine elements and CAD tools, preferably Fusion 360.
• Strong analytical and problem-solving skills, especially for root cause analysis.
• Ability to manage timelines and collaborate with cross-functional teams.
• Willingness to visit vendor sites and oversee prototype fabrication and debugging.

Good to have:

• Hands-on participation in SAE, robotics, or other collegiate technical clubs.
• Basic knowledge of electronics and plastic part design.

Stipend: INR 25K per month

Business Development Intern

About the role

As a Business Development Intern at Thinkerbell Labs, you will help scale Annie, the world’s first self-learning Braille ecosystem, along with other trailblazing products we’re bringing to life. If you believe innovation can drive social change, you’ll fit right in.

What will you be doing?

If you're hired for this role, you will be taking up the following responsibilities among others:

• Identifying and onboarding beneficiaries and users who will benefit from our products.
• Handling client questions, inquiries, and challenges with professionalism and care.
• Coordinating with government departments to facilitate orders and partnerships.
• Reaching out to companies for funding and collaborations to fuel our growth.
• Preparing and sending quotes, proposals, and project reports to drive deals forward.
• Setting ambitious sales goals and crafting strategies to achieve them.
• Researching prospects, generating leads, and keeping the pipeline buzzing

What you'll need to bring to the table:

• Pursuing or completed an undergraduate/postgraduate degree in management, engineering, or equivalent.
• Strong analytical skills and a knack for numbers.
• Clear, confident verbal and written communication.
• A flair for customer service and sales.
• Solid negotiation and problem-solving abilities.
• Patience and empathy to understand and resolve customer needs.

Good to have:

• Prior experience in B2B, B2C, or B2G sales.
• Hands-on familiarity with CRM or sales automation tools.
• Exposure to special education technology.

Stipend: INR 25K per month

Corporate Partnerships and CSR Intern

About the role

If you're studying liberal arts, social work, or development studies and want to understand how social impact actually gets funded and scaled in India, this is a front-row seat. You will work directly alongside our Corporate Partnerships & CSR Lead, learning how a deep-tech social enterprise builds relationships with corporate CSR teams, structures partnerships under India's CSR law (Companies Act, Section 135), and turns funding into real classroom deployments for children with visual impairments.

What will you be doing?

If you're hired for this role, you will be taking up the following responsibilities among others:

• Research and map potential corporate CSR partners — sustainability leads, CSR heads, and foundations working in education and disability inclusion.
• Support the development of partnership proposals, impact narratives, and pitch materials.
• Help track and organise the partnerships pipeline (CRM support, meeting notes, follow-ups).
• Assist with preparing content for CSR compliance requirements and impact reporting.
• Get exposure to real partner meetings and, as you build confidence, take on direct contact with prospects.
• Support the design of outcome and impact metrics that make our case to funders compelling and honest.

What you'll need to bring to the table:

• Students and recent graduates of liberal arts, social work, and development studies programs — no prior CSR experience needed.
• Genuine interest in disability inclusion, education equity, or the broader development and social sector as a career direction.
• Strong writing and communication skills — you will be drafting real materials that go in front of corporate decision-makers.
• Comfort with ambiguity and a self-starter mindset; you will be trusted with real responsibility quickly.
• Curiosity about how funding, policy, and grassroots impact connect.
• A knack for developing networks and making the ask.
• Basic comfort with spreadsheets and CRM tools (we'll teach you the rest).

What you'll gain:

• Direct mentorship from our leadership team on how social sector fundraising, CSR strategy, and corporate partnerships actually work in India.
• A deep understanding of the CSR ecosystem — regulation, buyer psychology, and decision cycles — directly transferable to a career in the development or social sector.
• Exposure to how impact is measured, evidenced, and communicated to funders and policymakers.
• A close-up view of a category-defining assistive technology company at a pivotal growth stage.
• A strong reference and concrete, story-worthy experience for future development-sector roles.

Reports to: Lead, Corporate Partnerships & CSR

Stipend: Competitive

Strong performers will be considered for a full-time Pre-Placement Offer at the end of the internship.