I am a Mechanical Engineer with hands-on experience in maintenance and workshop environments within manufacturing settings. I have worked with CAD-based design, 3D modeling, sheet metal, injection mold workflows, and rendering to bring ideas to life. I enjoy turning technical challenges into practical, reliable solutions. I value teamwork, continuous learning, and delivering high-quality results that boost productivity and reduce downtime. I aim to contribute to a dynamic organization by applying my design and fabrication insights to improve processes and products.

Md. Shadequzzaman Sarker

I am a Mechanical Engineer with hands-on experience in maintenance and workshop environments within manufacturing settings. I have worked with CAD-based design, 3D modeling, sheet metal, injection mold workflows, and rendering to bring ideas to life. I enjoy turning technical challenges into practical, reliable solutions. I value teamwork, continuous learning, and delivering high-quality results that boost productivity and reduce downtime. I aim to contribute to a dynamic organization by applying my design and fabrication insights to improve processes and products.

Available to hire

I am a Mechanical Engineer with hands-on experience in maintenance and workshop environments within manufacturing settings. I have worked with CAD-based design, 3D modeling, sheet metal, injection mold workflows, and rendering to bring ideas to life. I enjoy turning technical challenges into practical, reliable solutions.

I value teamwork, continuous learning, and delivering high-quality results that boost productivity and reduce downtime. I aim to contribute to a dynamic organization by applying my design and fabrication insights to improve processes and products.

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Language

English
Advanced
Bengali
Fluent

Work Experience

3D CAD Specialists at Upwork
February 10, 2014 - Present
Maintenance Engineer at PRAN & RFL Group
February 3, 2014 - August 13, 2025
Worked in the Workshop Department responsible for maintenance engineering. Oversaw machine maintenance and repairs, ensuring operational efficiency at the company's facilities. Maintained equipment and supported different production lines with technical maintenance from July 2010 to February 2014.
Maintenance Engineer at PRAN & RFL GROUP
February 3, 2014 - August 13, 2025
Worked in the workshop department handling maintenance engineering tasks from 14th July 2010 to 3rd February 2014. Responsibilities involved ensuring smooth operation of mechanical equipment and supporting manufacturing lines.
Product Designer (Freelancer) at Upwork
February 4, 2014 - Present
Freelance product designer specializing in injection mold design, 3D printed design, surface design, sheet metal, welding (ISO, ANSI standards), and rendering images. Portfolio and ongoing projects include wafer, biscuit, cookie, and Mecatherm production lines.
Maintenance Engineer at PRAN & RFL GROUP
July 14, 2010 - February 3, 2014
Maintenance Engineer in Workshop overseeing preventive maintenance, repairs and optimization of production equipment; coordination with production teams to minimize downtime.

Education

B. Sc Engineer at Khulna University of Engineering and Technology (KUET)
February 1, 2005 - April 1, 2009
Mechanical Engineer
B.Sc. Engineering at Khulna University of Engineering & Technology (KUET)
January 11, 2030 - January 1, 2009
H.S.C at Dhaka College
January 11, 2030 - January 1, 2004
S.S.C at Motijheel Model School & College
January 11, 2030 - January 1, 2002
B.Sc. Engineering in Mechanical Engineering at Khulna University of Engineering & Technology (KUET)
January 1, 2005 - January 1, 2009
Higher Secondary Certificate (H.S.C), Science at Dhaka College
January 1, 2002 - January 1, 2004
Secondary School Certificate (S.S.C), Science at Motijheel Model School & College
January 1, 2000 - January 1, 2002
B.Sc. Engineering at KUET
January 11, 2030 - January 1, 2009
H.S.C. (Science) at Dhaka College
January 11, 2030 - January 1, 2004
S.S.C. (Science) at Motijheel Model School & College
January 11, 2030 - January 1, 2002

Qualifications

B. Sc Engineer
February 1, 2005 - April 1, 2009
Certified CSWP
February 17, 2020 - February 17, 2020
Employee on the PRAN-RFL group.
August 13, 2025 - August 13, 2025
I was working as a maintenance engineer at PRAN-RFL Group.
AutoCAD-2009
January 11, 2030 - August 13, 2025
Inventory-2008
January 11, 2030 - August 13, 2025
AutoCAD - 2009
January 1, 2009 - August 13, 2025
Inventory - 2008
January 1, 2008 - August 13, 2025
CSWP (Professional)
January 1, 2020 - April 18, 2026
Programmable Logic Controller (PLC) Short Course
January 11, 2030 - April 18, 2026
Inventory -2008
January 11, 2030 - January 1, 2008
AutoCAD -2009
January 11, 2030 - January 1, 2009

Industry Experience

Manufacturing, Consumer Goods, Wholesale & Distribution, Professional Services, Other
    uniE621 Travel Soap Case 3D Design Project
    I designed a complete 3D model of a Travel Soap Case based on my client's specifications. The design includes an inner compartment that securely holds a bar of soap, making it easy and safe to carry during travel. The compact structure allows users to place it comfortably inside a bag or even a pocket. The prototype was developed through 3D printing, and as per my client's request, I created two different surface textures on the exterior. Achieving these textures required time, careful attention, and multiple iterations. My client was patient, supportive, and exceptionally easy to communicate with, which made the project smooth and enjoyable from start to finish. For affordable prototyping solutions, I often recommend PRO MOLD COMPANY LIMITED in China. I have collaborated with them for several years for 3D printing and mold design through my Upwork projects. Their service quality and cost efficiency make them a reliable option for similar product development needs. Freelancing is my full-time profession, which allows me to remain available for extended working hours and deliver projects within my clients’ timelines. I take pride in being consistent, responsible, and committed to meeting deadlines across any time zone. This project reflects my dedication to detail, client satisfaction, and high-quality product design.
    uniE621 Enclosure Design Modification and Error Correction Project
    I recently completed a detailed and challenging enclosure modification project that originated from a long-term LinkedIn connection. The client first reached out two years ago, then invited me to work through Upwork after reviewing my portfolio. He shared a STEP file of his enclosure design and explained that he faced multiple issues after 3D printing. His goal was to receive a fully corrected, error-free STL file that would print successfully on the first attempt. As he had already spent a significant amount on failed prototypes, he made it clear that there could be no further revisions once delivered. The project began with five initial issues, which later expanded to eight additional problems related to clearances, alignment, wall thickness, snap fits, and overall structural integrity. Since the project required a flawless result, I proposed a step-by-step workflow. For each issue, I created a comparison showing the original design and my corrected version using screenshots and simplified drawings. I sent each update for his approval before moving on to the next task. This process allowed the client to verify every correction carefully and ensured we moved forward with complete clarity. We continued this iterative verification approach for a month. I dedicated long hours and several all-night sessions to ensure accuracy, especially since the client depended on a perfect final output. After completing all corrections, I delivered the updated STL files. The client successfully printed the revised enclosure, and all issues were fully resolved. His satisfaction made the effort worthwhile, and I appreciated the trust he placed in my work. Following this project, the same client assigned two additional projects: one for a brand-new enclosure design and another for a product animation. Building long-term professional relationships like this is one of the most rewarding parts of my freelancing journey.
    uniE621 𝟑𝐃 𝐏𝐫𝐢𝐧𝐭𝐞𝐝 𝐀𝐬𝐬𝐞𝐦𝐛𝐥𝐲 𝐉𝐈𝐆 𝐃𝐞𝐬𝐢𝐠𝐧 𝐟𝐨𝐫 𝐂𝐨𝐧𝐬𝐭𝐫𝐮𝐜𝐭𝐢𝐨𝐧
    designer I recently completed a specialized 3D printing project for Simon Procter from Australia, focused on creating a precision assembly JIG used in a construction workflow. The project began with an initial concept sketch and evolved through three detailed design iterations to achieve accuracy, stability, and ease of production. The primary challenge was to develop a robust and lightweight JIG that could hold and align multiple components during assembly while ensuring repeatable precision in a construction environment. Each iteration was carefully tested for fit, tolerance, and manufacturability to meet the client’s functional requirements and printing feasibility. The final version was developed using SolidWorks 2023 and included a complete design package with exploded views, bill of materials (BOM), and STL-ready files for direct 3D printing. The final assembly consisted of a mainframe, EZ plate, pressure components, and threaded locks, ensuring seamless performance and quick assembly on-site. This project successfully combined digital design precision with practical field usability. The client approved Version 3 after final testing, and the JIG has already proven to be a valuable tool in their production workflow.
    uniE621 AirPods STEP File Modification and Vertical Reorientation Project
    I completed an exciting and technically challenging 3D modification project involving a client's AirPods STEP file. The original AirPods model was designed in a horizontal orientation, and the client requested a complete reconfiguration to convert the earbud structure into a vertical layout while keeping all internal components intact. This required precise adjustments, accurate measurements, and careful consideration of internal spacing to ensure functionality after 3D printing. The project had a tight delivery deadline of only four days. I analyzed the entire STEP assembly, reorganized the internal parts, and modified the external housing to support the new vertical design. The biggest challenge was maintaining component alignment and ensuring the internal electronics could still fit perfectly without compromising performance or structural integrity. After finalizing the modification, the client proceeded with 3D printing the updated design. The AirPods worked flawlessly, confirming that the new vertical layout was fully compatible with real-world use. The client is now preparing to submit the design to their government authority for trademark registration under their company name. Once the trademark certification is approved, this AirPods design will move into mass production at the client's factory. I am grateful to have contributed to a product that will be commercially available in the near future. Being part of a project that moves from digital modification to real-world production is a rewarding experience, and I am thankful to have delivered the work within the deadline with complete client satisfaction. designer
    uniE621 Composite Multi Filter Shower Purifier CAD Design Project
    I recently completed a challenging CAD design project for a multi-stage shower purifier that required both speed and precision. The client needed the full product design within a short deadline and also requested high-quality photo-realistic renderings to help visualize the final product for publication. I created a complete Design Specification Sheet featuring detailed renderings along with a separate technical drawing file containing only the Bill of Materials table. Based on the client's requirements, the shower purifier was built around four key filtration layers, including lemon beads, carbon fiber, calcium sulfite, and vitamin C. In addition to the filter layers, the internal structure included 14 unique components such as a special reducer, cartridge top and bottom, O-rings, steel mesh, and supporting parts. I developed each component from the client's documents and assembled them into a fully functional CAD model. Once the assembly and technical drawings were completed, the client’s engineering team reviewed the files and requested several updates. I incorporated every detail of their feedback, refined the drawings, and delivered a polished final design package. The upgraded model and accurate documentation ensured the purifier was ready for production-level evaluation. The client appreciated the precision of the CAD work and the realistic renderings that showcased the product clearly. I also received the promised bonus for delivering exceptional output on time. To me, the client's trust and satisfaction are more important than the bonus. Completing this project successfully and earning positive feedback reminds me why I enjoy helping clients bring innovative product ideas to life. designer
    uniE621 3D Product Model and CAD Development for Kids Tablet Case
    I completed an exciting and practical 3D product design project focused on developing the outer frame for a child-friendly iPad case, branded as Case Cups™. The client needed a durable, visually appealing, and functional protective case for kids, complete with detachable snack and drink holders that could be easily snapped in and out during use. My task was to create a complete CAD model and manufacturing-ready documentation that could move directly into prototype production. The project required thoughtful consideration of grip comfort, corner protection, and safe handling for children. I designed the frame with structural reinforcements while ensuring it remained lightweight and easy to hold. One of the key features was the snap-fit mechanism for the detachable holders, which needed to be strong enough for everyday use yet simple for kids to operate. Precision tolerances and testing were essential in developing a reliable and smooth locking action. Once the final model was ready, I prepared the CAD files for FDM 3D printing. The prototype is currently being produced by a professional Chinese 3D printing partner with whom I collaborate regularly. Their consistent quality, fast turnaround time, and cost-effective service continue to bring excellent satisfaction to my clients. The printed prototype will allow the client to test the product in real-world conditions before moving toward further refinement or mass production. Being able to transform a concept into a functional, kid-safe, 3D printable design is always fulfilling. This project offered a great balance of creativity, ergonomics, and engineering precision. I am glad to see it progressing smoothly into the prototyping stage.
    paper Photo-realistic and furniture-making designer

    I’m a photo-realistic and furniture-making 3D designer with a proven track record in exhibition stall layouts, furniture integration, and high-quality visualizations. Using SolidWorks 2023, I create realistic, detail-rich designs that align perfectly with style references and functional needs.