Mechanical Engineer – One-Piece Injection Molded Mechanism (Concept Development)

Upwork
Washington, US
Remote

Job Description

I am developing a new product and need a mechanical engineer who can solve a geometry problem — not just create CAD.

This is NOT a typical design job.

PROJECT CORE CHALLENGE

Design a one-piece injection-molded structure that:

  • Can be adjusted to different angles during installation
  • Then becomes fully stable and holds its position permanently
  • Uses geometry only — no hinges, pins, fasteners, inserts, or multi-part assemblies
  • Becomes more stable under load, not less
  • Distributes load across the structure (no single stress point)
  • Unit is one piece

The structure itself is a mechanism — a single molded body.

HARD REQUIREMENTS (NON-NEGOTIABLE)

  • ONE continuous molded part
  • NO multi-part solutions
  • NO hardware, rods, fasteners, or external supports
  • Must be compatible with injection molding
  • Must rely on geometry, not material flex or elasticity
  • Must hold position after adjustment (no spring-back or memory behavior)
  • Must be made from a rigid material, no rubber any other elastomeric material

If your approach requires multiple parts — this is not the right project.

WHAT I EXPECT FROM YOU

  • Early-stage concept thinking and problem solving
  • Clear iteration and communication (no disappearing for a week with zero communication, which I have been experiencing and brings me here)
  • Willingness to share rough ideas and evolving direction
  • Ability to explain:
  • load distribution
  • failure points
  • manufacturability

This is a fast-iteration phase, not a “go build and come back later” project.

NOT A GREAT FIT

  • Engineers who default to assemblies or multi-part mechanisms
  • Engineers who need complete specs before thinking
  • Engineers who disappear for multiple days before sharing progress
  • Generic CAD modelers without mechanical reasoning

IDEAL BACKGROUND

Experience with:

  • Injection molded product design
  • Geometry-driven mechanisms
  • Complex load distribution design

AND HAS THE BANDWIDTH TO TAKE ON A NEW PROJECT

INITIAL DELIVERABLES

  • Concept sketches / CAD direction
  • Explanation of:
  • how movement is controlled
  • how the structure stabilizes
  • how it can be manufactured

TIMELINE EXPECTATION

  • Initial direction within 24–48 hours of acceptance
  • Ongoing visible progress — no long silent gaps

FINAL NOTE

This is the core engineering challenge of the product. Happy to discuss further details to give general direction where the product is heading, along with rudimentary sketches and examples to kick start your thinking/process.

The engineer who solves this will continue on:

  • Full product development
  • Production design
  • Future product line expansion

I am looking for a long-term partner — not just task completion.

Skills & Requirements

Technical Skills

Injection molded product designGeometry-driven mechanismsComplex load distribution designMechanical engineeringInjection molding

Employment Type

FREELANCE

Level

Mid-Level

Posted

4/30/2026

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