Hire the Best Engineering Designers
in the Netherlands

Hi, I'm Osman Ender Kalender, a Naval Architect (MSc) based in the Netherlands with 15+ years of experience in yacht design, commercial vessels, workboats, small craft engineering, and advanced 3D modeling. My background spans Feadship, Damen Schelde Naval Shipyard, Euromarine, Sarp Yachts, and multiple R&D and concept-development roles. I specialize in solving complex marine engineering problems quickly and accurately—whether you need hydrodynamic analysis, stability, 3D vessel development, structural layouts, or professional engineering judgment for design decisions. My work combines naval architecture + 3D visualization + practical shipyard-level engineering, which gives clients a rare combination: beauty + engineering accuracy + production-ready thinking. 🔹 WHAT I DO BEST 1) Small Craft & Yacht Engineering (6–50 m) - Hull design, refinements, hydrodynamic viability - Stability, hydrostatics, trim analysis - Powering prediction & engine sizing - Weight estimation / LCG–VCG assessment - CE/RCD-inspired compliance guidance - Parasailing boats, fast craft, leisure craft, refit engineering 2) Concept-to-Model Development -Starting from a hull, sketch, or GA, I can build a full 3D marine model including: -Structural members (frames, girders, longitudinals) -Decks, bulkheads, superstructure -Machinery spaces & arrangement -Piping fundamentals (routing, logical placement) -Clean Rhino topology suitable for CNC & production -CAD drawings (DWG/2D production sheets) This is ideal for early-stage startups, boat builders, and engineering teams lacking in-house naval architecture support. 3) Fast Engineering Consultancy (48h Sprint) Short, high-impact technical tasks: Hydrodynamic viability check Recommended HP + performance prediction Weight distribution evaluation Safety/rigging/structural recommendations Quick technical memos for investors & founders Pre-survey design review for concept feasibility 🔹 TOOLS & SOFTWARE Rhino 3D (expert) – main modeling tool Maxsurf – stability, hydrostatics, powering PIAS – naval architecture tools AutoCAD – 2D drafting KeyShot / Lumion – photoreal renders Siemens NX / 3DX / Teamcenter – production-level design MS Project / PMI methodology – project planning 🔹 WHAT MAKES ME DIFFERENT? ✔ Engineering-Level Accuracy Most 3D designers are artists. I am an engineer first, ensuring proportions, hydrostatic balance, centerlines, and structure make sense in the real world. ✔ Shipyard-Ready Thinking I’ve worked inside major Dutch yards. I know what is buildable, maintainable, and safe. ✔ Clear Communication & Documentation I can deliver technical notes, short engineering memos, design justifications, and investor-friendly feasibility summaries. ✔ Fast & Iterative My workflow is ideal for clients who need progress quickly: “Share your model → I analyze → we iterate → you get clear answers.” ✔ Global Marine Perspective Hydrodynamics, weight, stability, safety—and the practical realities of operating boats—are core to how I work. 🔹 TYPES OF PROJECTS I DELIVER -3D Development Cargo ships (from hull + GA → full 3D structure) Passenger boats Parasailing vessels RIBs, tenders, chase boats Concept vessels & prototypes -Technical Guidance Stability (intact/damage overview level) Powering & performance Weight distribution plans Safety equipment selection Preliminary structural evaluation Feasibility assessments -Visualization Photorealistic renderings Concept presentation materials Environment renders (river, sea, marina) 🔹 WHO I WORK WITH Boat builders Designers & inventors Startups developing new marine products Shipyards lacking NA support Entrepreneurs validating a concept Training schools, watersports companies RYA/CE consultants needing NA input 🔹 AVAILABILITY I work less than 30 hours/week, but in high-focus blocks, ideal for clients who want fast progress and clear results. Short-term sprints or long-term recurring support available. If your project involves water, structure, performance, or the real-world behavior of marine craft — I can help. Let’s build something seaworthy together. Send your hull, 3D model, GA, or even a sketch — and I’ll take it from there. — Osman Ender Kalender Naval Architect, MSc

Hi! I am Naval Architect from Argentina, currently living in the Netherlands. If you are looking for help with your project , regarding 3D modelling, Naval Architecture and yacht design or also rendering and visualization I will be glad to give you a hand and support.

🚀 From concept, to prototype, to production. My experience in every step of the process can help you bring your ideas to reality. Take a look at my portfolio below for some examples of the great projects I have completed. 📐 Design Priorities: - High reliability and robust performance - Cost-efficiency in prototyping and volume production - Manufacturability (DFM) - Design for Test (DFT) to simplify validation - Long-term component availability - EMC compliance (CE/FCC/UL) through proactive design - Production support, both onshore and offshore 🛠️ Preferred tools - Altium Designer (licensed) - KiCad - Git for version control 🤝 Available via vetted subcontractors: - Enclosure / mechanical design - Embedded firmware development - Desktop software integration For complete product development, I often act as the main technical contractor, ensuring seamless coordination between hardware, software, and mechanical teams. I am also available to join existing teams or solo jobs. 📞 Let’s Work Together If you have a project that requires experienced electrical engineering support, feel free to get in touch for a free consultation. I look forward to helping you build something exceptional.

If you have a product idea you want to bring to life, I can help you turn it into something you can eventually hold in your hands. I’m a hands-on Mechanical Engineer with over 9 years of experience developing products from the first sketch all the way to fully functional prototypes. I work across every stage of the design process, including concept development, CAD modeling, manufacturing, testing, and assembly. Over the years, I’ve gained practical experience with a wide range of fabrication methods such as laser cutting, creating precise DXF files, CNC machining, milling, lathe work, and general mechanical assembly. This means you’re not just getting a designer, but someone who understands how a product is actually built and how it needs to function in the real world. Whether you need a clear product concept, detailed 3D models, functional prototypes, or a design refined for production, I can support your project from beginning to end. I can help you move smoothly through the entire development process, from the initial idea to a prototype you can test and hold. From the first conversation to the final result, you will always know where your project stands. If you’re ready to turn your idea from an initial thought into a physical product, I’d be happy to help you take that next step.

Experienced Structural Engineer educated in an extensive field of structures, heavy and light, in various structural materials. I possess a good understanding of today’s market design changes. I reply to technical questions quickly and recognize good engineering opportunities to adjust to existing designs to make them fit for purpose. I'm well-versed in Structural Engineering, Earthquake Engineering, High Rise Structures, and Bridge Engineering. Skilled in most design analysis software such as ETABS, SAFE, SAP2000, CSIBridge, CSICols, TEKLA TEDDS, FORTE, IDEA StatiCa, etc. Ample experience in basic structural engineering and capable of providing highly detailed structural engineering designs, plans, and specifications. Excellent in AutoCAD and have been using it for 16 years now. My basic skills are: • analyzing configurations of the basic structural components of a building or other structure; • calculating the pressures, stresses, and strains that each component, such as a beam or lintel, will experience from other parts of the structure due to human use or environmental pressures such as weather or earthquakes; • considering the strength of various materials, e.g. timber, concrete, steel, and brick, to see how their inclusion may necessitate a change of structural design; • liaising with other designers, including architects, to agree on safe designs and their fit with the aesthetic concept of the construction; • examining structures at risk of collapse and advising how to improve their structural integrity, such as recommending removal or repair of defective parts or rebuilding the entire structure; • making drawings, specifications and computer models of structures for building contractors; • working with geotechnical engineers to investigate ground conditions and analyze results of soil sample and in-situ tests; • liaising with construction contractors to ensure that newly erected buildings are structurally sound; • applying expert knowledge of the forces that act on various structures; • using CAD technology for simulation purposes.

🤖 Senior AI Consultant & Conversation Designer | Conversational AI Specialist | 7+ years commercial experience | Top Rated Plus | Expert Vetted | MVPs & Production-ready AI Applications Most companies who automate their interactions end up with robotic, frustrating AI that drives users away. I help businesses build advanced AI Solutions that feel close to human, understand context, and drive real business results. With my academic background in Linguistics and AI, I design natural sounding AI Agents that imitate human speech and guide users to your target actions. I have over 7 years of experience advanced building AI Assistants and Voice Agents, offering consultations on chatbot development and conversation design, and also teaching people to build chatbots themselves, giving mentoring sessions and workshops. If your business needs an advanced AI Solution that sounds close to human, let's chat :) ==== #Chatbots #GPT4 #LLMs #Rasa #VoiceFlow #DialogFlow #Landbot #ManyChat # LangChain #OpenAI # RAG #VoiceBots #GenerativeAI #BlantAI #AirAI #Vapi #Prompt Engineering #N8N ==== ✅ What makes me different from other freelancers: ▣ Full-cycle AI chatbot development services: from a business idea to production. ▣ Business-oriented approach: I think about chatbots as a tool to solve a specific problem. I design chatbots with your business goals in mind and the problem you are trying to help your users solve. ▣ User-centric: For any software project, including developing chatbots, it's very important to always keep users in mind. I do user research before the beginning of the project and validate my assumptions as soon as possible on real users. ▣ Multidisciplinary: I am not just a full-stack developer. I have a background in Natural Language Processing and Artificial Intelligence and I understand Machine Learning and the mechanisms behind how chatbots actually work. ▣ A linguist by education: My first education is in Linguistics and I understand how language works. This helps me design conversations that sound natural and are user-friendly. ▣ I value transparent and direct communication. ▣ I value your time and I value my time and I prefer to deliver results quickly rather than doing work for the sake of work. ▣ Based on the reviews, people think I'm a nice person to work with :) ==== ✅ How I can help: ▣ Starting AI Assistant project: With the overwhelming amount of AI technologies available, it’s easy to get lost when trying to build an MVP quickly and cost-effectively to validate your idea. I offer consultations to help you polish your AI strategy and select the right tools, ensuring you build an MVP that’s aligned with your business goals. ▣ Full-cycle Advanced AI Chatbot Development: I offer full-cycle AI Chatbot Development services, from start to finish. For chatbot development I use GPT-4, Rasa, DialogFlow, ManyChat, Landbot and VoiceFlow. For backend I use Python. For frontend I use JavaScript (TypeScript). ▣ Data & conversation design: Creating AI solutions that sound natural is hard, you need to know what constitutes a good conversation in your specific domain. If you're looking to design conversations that feel authentic, I use a data-driven approach to analyse real-world conversations and design playbooks and prompts that help create human-like conversations. ▣ Audit of your existing chatbot: Is your chatbot struggling to deliver performance and you lack in-house expertise to bring it to the next level? I offer a chatbot audit to provide strategy for improvement. I audit conversation design to help rewrite dialogues to feel more natural, review technical implementation to improve AI quality, and analyse conversation logs to identify feature gaps. ▣ AI Workshops & Training sessions: AI is becoming a core part of business, so companies want to grow expertise in-house. If you are looking to train your team, I offer hands-on workshops to help teams design, develop, and optimise chatbots that drive real results. ▣ Chatbot UI: I also offer help with creating custom chatbot widgets for your website. ==== ✅ Tech Stack: ▣ LLMs, advanced RAG & finetuning, prompt engineering ▣ Chatbots: LangChain, VoiceFlow, OpenAI, DialogFlow, Rasa, ManyChat ▣ Voice: Vapi, Bland AI, Air AI, Twilio ▣ Vector Databases: LanceDB, Pinecone, weviate ▣ Generative AI: OpenAI, Antropic, Gemini, LangChain, LiteLLM ▣ Automations: Make, Zapier, n8n, CRM, Replit ▣ Deployment: Docker, AWS ▣ Integrations: web, WhatsApp, Telegram, Messenger, mobile apps ▣ Speech technology: Whisper, Deepgram, Eleven Labs ▣ Programming Languages: Python, JavaScript ==== ✅ Featured projects: ▣ Property Management AI Assistant (LiteLLM, OpenAI, FastAPI) ▣ Voice Agent for Real Estate (Vapi, ElevenLabs, OpenAI) ▣ Language Learning AI Agent (Rasa) ▣ Financial Assistant Chatbot (DialogFlow) For more see my portfolio below.