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7.7
7.7
100%
Lisse, Netherlands
$60 USD per hour
With 5 years of experience on this platform, I am a versatile and driven freelancer capable of handling projects across a wide range of technical fields. I have successfully managed single projects valued at over $30K and am open to long-term collaborations. Additionally, I hold valid certificates from this platform, showcasing my expertise—these can be found in the certificates section along with my results and badges. Whatever your project entails, from technical development to research and beyond, I’m here to deliver results that exceed expectations. Let’s work together to bring your vision to life! Artificial Intelligence & Machine Learning: ● Neural Networks: CNNs, Transfer Learning ● Reinforcement Learning: Q-Learning ● Computer Vision: YOLO, PyTorch, OpenCV, Image Segmentation, Object Detection Web Technologies: ● Front-End: HTML5, CSS3, JavaScript (ES6+) ● Back-End: Node.js, Express.js
8.2
8.2
90%
Dubai, United Arab Emirates
$50 USD per hour
I have phd in mechanical engineering from department of bioengineering and robotics from Tohoku university and I lead a team of expert engineering with the following skills: ***** AI Engineering ***** Machine Learning Models ETL / ELT Pipelines MLOps Hyperparametrs Tuning Fine Tuning GenAI Prompt Engineering Hugging Face ***** Data Engineering ***** CI&CD Kubernetflow Redis Vector Database Hadoop ecosystem GCP (Dataflow, BigQuery) Containerization (Docker) ***** Mechanical Engineering***** Solidworks Ansys Mechanical design Inventor Autocad Machine design Matlab Simulink Vibration Control Stress analysis ***** Electrical Engineering ***** Signal processing Image processing Power electronic Power transmission lines Kalman filters Electronics Conrol systems Identification ***** Computer engineering ***** Programming with python, Java, cpp, etc. Neural networks deep learning convolutional neural network artificial intelligence object detection web design and development iOS and Android apps
1.6
1.6
100%
Guayaquil, Ecuador
$50 USD per hour
Hello! I am an expert at applied mathematics. In 2018 I also won a NATIONAL GOLD MEDAL in the Ecuadorian Mathematical Olympics and obtained a BRONZE MEDAL at the IBERO-AMERICAN level. I have experience with engineering projects in MATLAB, Python and Mathematica, such as optimization, modelling and numerical methods.
7.6
7.6
95%
Nagpur, India
$50 USD per hour
I build clean, functional solutions fast across the full stack. Specializing in: - Web: React, Next.js, Node.js, Python, PHP, Ruby on Rails, Golang, Laravel, Django, WordPress, Vue.js - Mobile: React Native, Flutter, Android (Kotlin), iOS (Swift), Dart - AI & Machine Learning: LLM integrations (Claude, OpenAI, Gemini), RAG pipelines, LangChain, vector databases, prompt engineering, chatbots, NLP, OCR, generative AI - APIs & Integrations: REST, GraphQL, payment gateways (Stripe, PayPal, Razorpay), Twilio, SendGrid, third-party services - Cloud & DevOps: AWS, Azure, Docker, Kubernetes, Jenkins, CI/CD, Nginx, Linux server administration, Cloudflare - E-commerce & CRM: WooCommerce, OpenCart, Magento, Odoo, Prestashop, Point of Sale systems - Databases: MySQL, PostgreSQL, MongoDB, MariaDB, Elasticsearch, SQLite, Redis, Microsoft SQL Server - Trading & Finance: MetaTrader 4/5, MQL4/5, Pine Script, NinjaTrader, OpenClaw, backtesting, trading bots - Data & Automation: Excel/Google Sheets automation, dashboards, data analysis, workflow automation I focus on understanding your requirements clearly, delivering working code, and communicating progress throughout.
7.8
7.8
96%
LAAYUNE, Morocco
$25 USD per hour
***********************I shall either find a way or make it one******************** I'm an Engineer in Operational Research , I've got many skills and expertise that will allow me to achieve perfectly all the projects and missions. I have advanced knowledge's in: Vba Excel Optimization Queuing Theory Linear Programming Economics modeling, Data Mining: Factor analysis, Principal Component Analysis, Regression (Simple, Multiple, logistic, hierarchical, Poisson), Anova, Clustering, Hierarchical Clustering... I master Lingo, Ampl, Spss, Stata, R, Eviews, I'll provide you perfect reporting using MsWord. Also I have a huge experience / Knowledge with creating software for scraping/extracting data from web site with VBNET ------------------------------------------------------------------------------------------------
6.3
6.3
97%
Kampala, Uganda
$35 USD per hour
I am a graduate Mechanical Engineer with 6 solid years of industrial and practical experience, I am a critical thinker and I will provide validation for all the solutions presented. Additionally, I am very practical and creative with all my focus on ensuring that you get exactly what you want and nothing else. I have 5 years of experience working with teams and teams around the world. Do not let my geographical location worry you, I am available for work, meetings, and video calls between the hours of 0500HRS GMT to 1800HRS GMT, Monday to Saturday. For projects that require a quick turnaround, I will gladly create more time. Services offered; ⭐Engineering Design and Drafting ⭐Reverse Engineering ⭐Product design ⭐Rapid prototype design ⭐Value Engineering ⭐Computer Aided Engineering (Finite Element Analysis and Computational Fluid Dynamics) ⭐Technical Documentation ⭐Product Lifecycle Management Please feel free to invite me for a video call or chat to discuss your requirements and my abilities.
7.4
7.4
98%
PILAR, Argentina
$30 USD per hour
Hello! I'm a mathematician, a python expert and an AI engineer. I have developed extensive expertise in several areas of software development: - AI development: I'm experienced on every aspect of applied AI development, from data collection to fine-tuning to prompt engineering to developing applications with AI components and integrating AI components into applications. I work with Tensorflow and Pytorch for model training/deployment, OpenAI's models for designing NLP components (GPT3, chatGPT3.5, gpt4o/mini) and open source models for local development of NLP solutions (Llama, Mistral, Phi, Qwen). I work with llamaIndex and LangChain for RAG and agent development. - Optimization: As a mathematician I've worked in many optimization projects, modeling real-life data and objectives to apply optimization algorithms. I have expertise in operations research, combinatorial optimization, genetic algorithms, linear and non-linear optimization, among others. - Web development: I'm a certified full-stack developer, focusing mainly on python projects with Django, flask, fastAPI, and others. I also have experience with node.js. In addition to my technical expertise, I'm also a project manager, being able to understand user requirements, make a development plan and follow it through, dealing with any possible bump in the road. I'm a reliable and communicative freelancer who always meets deadlines and keeps my clients in the loop. Let's get in touch!
6.4
6.4
98%
Nagercoil, India
$40 USD per hour
Driven by Innovation. Delivered with Simplicity. 📌 We transform your ideas into real, working products with clear results and minimum complexity. ✅ Our Approach 💡 Tailored Development – We build what you need, not what’s easy for us. 🚀 Agile & Research-Driven – Every product is backed by solid R&D. 🔁 Pay After Demo (Optional) – See it working before committing. 🤝 Customer Satisfaction is Our Priority 🌟 A Unique Way of Product Development 🔧 Core Skills R&D & Prototyping – MATLAB | Python | Julia Mobile Apps – Flutter | Android | iOS (Swift) Web Applications – Svelte | HTML5 Backend – Core PHP | FastAPI Windows Apps – C# with Infragistics Embedded Systems – Arduino | ESP32 | PIC | Xilinx Databases – MySQL | MSSQL | SQLite 🧠 Expertise in Key Domains Optimization Algorithms Machine Learning & Deep Learning Data Science & Visual Analytics Power & Control Systems Simulation Models for: Cloud Computing Wireless Sensor Networks (WSN) Internet of Things (IoT) Unmanned Aerial Vehicles (UAVs) 🛠️ Our Products 📱 Flutter Mobile Apps: PiCarve – Design-Driven Services PiBot – Intelligent Bot-Based Assistant PiQuizEdu – AI-Enhanced Learning App 🖼️ 3D Visualization App: Pi3dDecor / v2rvision.com – Real-time 3D Decor Tool for Tiles, Walls, and Flooring 🧪 Recent Research Focus Artificial General Intelligence (AGI) AI-powered IoT Systems 💬 Client Feedback "This is the 2nd time I hired him and always will do."— Faten Ameen "Delivered a clear performance comparison for PID tuning. Simple, effective, and technically sound." Want to discuss your project? We listen, analyze, and deliver—from concept to working demo.
5.6
5.6
96%
Santiago, Chile
$38 USD per hour
php, javascript, android, shell script, linux, debian, c++, smpp, kannel, Proxmox,Airflow, sysadmin, + 15 years experience
A Combinatorial Optimization Expert is a specialist who applies mathematical modeling and algorithms to find the best possible solution from a finite set of discrete alternatives, solving problems like scheduling, routing, allocation, and assignment. Hiring a combinatorial optimization expert helps businesses minimize cost, maximize throughput, and make defensible decisions when the number of possible outcomes is too large to evaluate by hand. From vehicle routing to crew scheduling to bin packing, these freelancers turn complex operational problems into formal models and production-ready solvers.
A combinatorial optimization specialist translates a messy real-world problem into a precise mathematical formulation, then solves it using exact, heuristic, or metaheuristic methods. The output is rarely just an answer — it is a reproducible model, a tuned solver, and a decision pipeline that can be re-run as data changes.
Typical deliverables include integer programming and mixed-integer linear programming (MIP) formulations, constraint programming models, custom heuristics, branch-and-bound or branch-and-cut implementations, and benchmarking reports comparing solution quality against runtime. Many engagements end with a deployable optimization service exposed through an API or batch job, integrated with the client's data warehouse or ERP system.
Strong candidates are fluent across commercial and open-source solvers and know when to switch between them. Look for hands-on experience with Gurobi, IBM CPLEX, FICO Xpress, and open-source options such as CBC, SCIP, HiGHS, and GLPK. For constraint programming, Google OR-Tools and IBM CP Optimizer are standard.
Modeling is typically done in Python using Pyomo, PuLP, OR-Tools, python-mip, or the solver-native APIs, or in AMPL, GAMS, MiniZinc, and Julia with JuMP. For large-scale or hard instances, experts apply Lagrangian relaxation, column generation, Benders decomposition, branch-and-price, simulated annealing, tabu search, large neighborhood search, and genetic algorithms. Familiarity with graph libraries like NetworkX and igraph, plus performance tooling in C++ and Rust, is common for production work.
Combinatorial optimization experts serve logistics and last-mile delivery, manufacturing, airlines and rail, energy and utilities, telecommunications network planning, finance and portfolio construction, healthcare staffing and operating room scheduling, retail assortment and shelf-space planning, and sports league scheduling. Tech companies hire them for ad allocation, matching marketplaces, cloud resource scheduling, and warehouse robotics. Any business with constrained resources, discrete choices, and measurable objectives is a candidate use case.
Look for a foundation in operations research, applied mathematics, industrial engineering, or computer science, and practical evidence of shipped optimization systems. Strong portfolios show before-and-after metrics: reduced route distance, improved on-time rates, lower scheduling conflicts, or higher utilization. Ask for sample model files, benchmark logs, and a description of how they handled infeasibility, symmetry, and solver tuning on past work.
Tool proficiency signals to verify include comfort with at least one commercial solver, fluency in a modeling language, and familiarity with decomposition techniques for large instances. Sample interview questions:
Optimization projects often pair with data engineering, machine learning forecasting (demand, travel time, service time), simulation, geospatial analysis, and software engineering for deployment. If your problem includes uncertainty, you may also want experience with stochastic programming or robust optimization. If the solver needs to run inside a product, look for candidates who can package models as microservices and integrate with cloud infrastructure.
Freelancer.com gives you access to a global pool of operations research specialists, MIP modelers, and metaheuristic engineers, including PhDs and industry practitioners with shipped production systems. You can review verified profiles, portfolios, and client reviews, then receive competitive bids tailored to your problem and budget. Whether you need a one-off model for a scheduling decision or a long-term partner to build a routing engine, you will find vetted freelancers on Freelancer.com across every time zone. Posting a project is free, and Milestone Payments protect your funds until deliverables meet your standard.
Hiring an optimization specialist works best when the buyer treats the engagement like a research-and-engineering project, not a generic coding task. The clarity of your problem statement directly shapes the quality of bids you receive. The three steps below walk you through posting a brief, reviewing proposals, and awarding the work.
Your project brief is the single biggest determinant of bid quality, because optimization experts can only price the work once they understand the decision variables, constraints, and objective. A vague brief produces vague bids; a precise brief filters for candidates who genuinely match your problem class. Head to the
Bids are short proposals that reveal how the freelancer interprets your problem, not just a price tag. A strong optimization bid will identify the problem class, suggest a formulation approach, and flag the parts of your brief that need clarification. Read each proposal carefully and use Freelancer.com chat to ask follow-up questions before shortlisting.
Your final decision should combine proposal quality with profile evidence. Optimization is a craft where consistency matters more than a single flashy result, so weigh portfolio depth, repeat clients, and detailed reviews from past operations research engagements. Look for evidence of shipped systems, not just academic exercises.
A focused proof-of-concept model for a well-defined problem can take one to three weeks, while a production-grade solver integrated with live data typically runs one to three months. Timelines depend on data availability, problem size, and whether exact methods are tractable or custom heuristics are required.
Machine learning predicts outcomes from data, while combinatorial optimization decides among discrete alternatives subject to constraints. They are complementary: ML often produces the inputs (demand, travel times, costs) that an optimization model uses to make decisions. Many modern systems combine both in a single pipeline.
If your problem is "what should we do given these constraints," you need an optimization expert. If your problem is "what will happen" or "what pattern is in this data," you need a data scientist. Routing, scheduling, assignment, and packing problems almost always benefit from a specialist in operations research.
Yes. Many engagements are short, scoped projects — building a single model, solving a specific scheduling instance, or auditing an existing solver. You can hire on Freelancer.com for a single deliverable and re-engage later if the problem evolves.
Have a clear description of the decision being made, the constraints that must hold, the objective you want to optimize, and a representative dataset or sample instance. The more concrete your problem statement, the more accurate the bids and timelines you will receive.
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