Senior Mechanical Engineer, Injection Molding & NX (Remote)

Toptal; United States; On-site; USD 124,000 - 179,000; Part time

Job summary

Toptal is seeking a highly experienced Mechanical Engineer for a fast-paced, short-term remote engagement. This hands-on design role requires rapid onboarding and delivering meaningful output within days, not weeks, working deep in Siemens NX on plastics-focused challenges headed toward injection molding production.

Responsibilities include designing and refining TPU overmolded parts, managing heat insert placement, applying GD&T, performing tolerance stack-up analysis, and supporting IP-rated

Qualifications

• Hands-on, fast ramp-up with Siemens NX on plastic components.
• Experience with injection-molded parts and TPU overmolding.
• Proficiency in GD&T and tolerance stack-up analysis.
• IP-rated enclosure and UI/button design experience.

Responsibilities

• Deliver mechanical design work in Siemens NX with a focus on plastic components for injection molding
• Design and refine TPU overmolded parts
• Manage heat insert placement and integration into plastic housings
• Apply functional dimensioning and geometric tolerancing to ensure manufacturability
• Perform tolerance stack-up analysis to validate fit and function across assemblies
• Support IP-rated enclosure design and button/user interface component design

Skills

Siemens NX

Injection-molded plastics

TPU overmolding

Heat insert management

GD&T

Tolerance stack-up

IP-rated enclosure design

UI/button design

Immediate start

Tools

Siemens NX

Job description

Toptal is seeking a highly experienced Mechanical Engineer for a fast-paced, short-term remote engagement. This hands-on design role requires rapid onboarding and delivering meaningful output within days, not weeks, working deep in Siemens NX on plastics-focused challenges headed toward injection molding production.

Responsibilities include designing and refining TPU overmolded parts, managing heat insert placement, applying GD&T, performing tolerance stack-up analysis, and supporting IP-rated