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→ Login to BidThis Fixed Price project titled "Optimizing Ethylene Purification Column Design" is currently open for freelancer bids on the DJN Freelance Marketplace. The client has set a budget of USD 1,700 – 3,800 for this engagement, with work delivered remotely from any location worldwide. Freelancers with relevant experience can submit proposals directly through the DJN platform to be considered for this role. DJN is a global freelance marketplace connecting verified professionals with clients across design, development, writing, marketing, and 50+ other categories.
To bid on "Optimizing Ethylene Purification Column Design", freelancers need a verified DJN account with a completed profile showcasing relevant portfolio work and skills. After signing in, use the "Place Bid" option on this project page to submit your proposal with your estimated timeline, deliverables breakdown, and total cost. Successful bidders receive project awards directly through the platform, and payments are held in secure escrow until milestone approval — protecting both client and freelancer throughout the engagement.
Yes, this project is currently open and accepting freelancer bids. Submit your proposal to be considered.
DJN uses milestone-based escrow. When a client awards a project, funds are held securely until each milestone is delivered and approved. This protects freelancers from non-payment and gives clients confidence that work is completed before funds are released.
Yes, this is a fully remote freelance project — you can work from any location worldwide.
The client has listed these required skills: Process Simulation, Chemical Engineering, Design Optimization, Process Design, Ethylene Production, Column Design. Freelancers with demonstrated experience in these areas are strongly encouraged to submit a proposal.
Detailed requirements, a realistic timeline, a budget range and examples of similar work attract stronger proposals from qualified freelancers. Breaking a larger project into milestones makes progress easier to track for both sides.
DJN is a freelance marketplace operated by 3D-LABS Engineering, an engineering firm in business since 2003. Clients post project-based work and freelancers submit proposals, with defined milestones, progress tracking and in-platform messaging across development, design, writing, engineering and related fields.
Create a free DJN account, open this project page, and submit a proposal describing relevant experience, portfolio samples and your proposed timeline.
The skills listed on this project page are the starting point. Most Process Simulation work also calls for demonstrated experience in similar projects, clear communication and the ability to meet agreed deadlines.
DJN provides structured project management: defined deliverables, milestones, stage-by-stage progress updates and in-platform messaging between both parties.
Yes. Clients can post follow-up projects or agree ongoing arrangements directly with a freelancer they have worked with before.
The budget posted by the client is $3,800. Final terms are negotiated between the client and the selected freelancer, so include your own rate in your proposal.