Company: Sirena Tech

Location: Bengaluru

Employment: Full-time

Department: Engineering / Mechanical Design

Experience: 2-5 years preferred

Role overview

At Sirena, we are building next-generation robotics systems that combine advanced AI, electronics, and precision mechanical engineering. We are looking for a Mechanical / Actuator Design Engineer who can design compact, reliable, and high-performance mechanical systems for robotic applications. The ideal candidate will have strong fundamentals in mechanical design, hands-on CAD experience, and an understanding of gears, transmissions, structural design, and precision engineering.

Responsibilities

- Design and develop gear systems and mechanical transmissions, including planetary and harmonic drive mechanisms.
- Design robotic actuators, gearboxes, and mechanical assemblies for compact and high-performance applications.
- Create detailed 3D CAD models, assemblies, and manufacturing drawings.
- Perform mechanical calculations related to torque, forces, stresses, loads, and transmission ratios.
- Design components considering strength, stiffness, durability, wear, and fatigue.
- Work on compact mechanical designs while maintaining performance and reliability.
- Consider thermal, mechanical, and dimensional constraints during the design process.
- Select appropriate materials, bearings, gears, fasteners, and other mechanical components.
- Collaborate with electrical, motor-control, firmware, and robotics teams to develop integrated actuator systems.
- Support prototyping, assembly, testing, and design validation.




- Identify mechanical failures or design issues and implement appropriate design improvements.
- Work closely with manufacturing and vendors to ensure designs are practical and manufacturable.
- Maintain proper engineering documentation, drawings, BOMs, and design revisions.

Requirements

- Bachelor's degree in Mechanical Engineering, Mechatronics, or a related field.
- Strong understanding of mechanical design fundamentals.
- Hands-on experience with professional CAD software such as SolidWorks, Creo, CATIA, Fusion 360, or equivalent.
- Understanding of gear systems, bearings, shafts, couplings, and mechanical transmissions.
- Knowledge of planetary gearboxes and/or harmonic drives is highly preferred.
- Understanding of engineering materials and manufacturing processes.
- Ability to perform basic mechanical and structural calculations.
- Good understanding of GDT, tolerances, fits, and precision engineering.
- Ability to interpret and create detailed engineering drawings.
- Strong problem-solving and analytical skills.

Good to have

- Experience designing robotic actuators or servo mechanisms.
- Experience with BLDC/PMSM motors and motor-actuator integration.
- Knowledge of gearbox efficiency, backlash, stiffness,



and transmission losses.
- Experience with FEA / structural simulation tools.
- Understanding of thermal analysis and heat dissipation in compact mechanical systems.
- Hands-on experience with rapid prototyping, CNC machining, 3D printing, or manufacturing.
- Experience working on robotics, automation, drones, EVs, or other high-performance electromechanical systems.

What we're looking for

- Enjoys solving challenging mechanical design problems.
- Can take a mechanical concept from idea, CAD, prototype, testing, final design.
- Has strong attention to detail and understands the importance of precision in robotics.
- Is comfortable working in a fast-paced, hands-on engineering workplace.
- Can collaborate effectively with multidisciplinary engineering teams.
- Is willing to experiment, prototype, test, and continuously improve designs.

Why join Sirena

- Work on next-generation robotics and Physical AI systems.
- Solve real-world mechanical engineering challenges.
- Work closely with multidisciplinary teams across mechanical, electrical, embedded, AI, and robotics.
- Opportunity to work on high-performance actuators and robotic mechanisms.
- Be part of a hands-on engineering environment where your designs move from concept to physical hardware.

Disclaimer: This job posting and Location has been aggregated from external source. Role details, content, and availability are subject to change. Applicants are advised to confirm the latest information directly on the company website before applying.

📌 Mechanical / Actuator Design Engineer (Bengaluru)
🏢 Sirena Technologies
📍 Bengaluru