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$60/hr
94%
Job Success
$1M+ earned
Available now
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✅ 15+ years of overall programming experience.
🗃 50+ successfully completed projects on Upwork.
🎓 Master's degree in Applied Mathematics and Informatics.
Specialize in:
💎 Web Development
💎 Desktop Development for Windows
💎 Mobile Development for iOS / Android / Cross-platform
💎 MS Dynamics 365 / Salesforce
💎 UI / UX Design
💎 VR & AR Development using Unreal Engine / Unity 3D
💎 Artificial Intelligence/Machine Learning
💎 Project / Product Management
💎 Technical Oversight / Solution Architecture
Expert in: C#, JavaScript, TypeScript, MS SQL, MySQL, PostgreSQL, MongoDB, ADO.NET, Entity Framework, OData, WCF Services, SOAP, REST, ASP.NET, ASP.NET MVC, ASP.NET Core, WebAPI SignalR, WinForms, WPF, ClickOnce, WinServices, MSMQ, DirectX/OpenGL, 3D Graphics, HTML, CSS, JavaScript, JQuery, Angular, React, Blazor, Vue, ElasticSearch/Solr.NET/Lucene, Redis, Azure, AWS.
Yurii B.
has worked
.
United States
$100/hr
88%
Job Success
$1M+ earned
Available now
Start of list.
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I help startups and enterprises build, rescue, or scale robust full-stack applications with .NET Core/.NET 8+ and React/React Native.
Clients hire me when they need:
• A reliable "founding engineer" to ship MVP → production fast (web, mobile, IoT)
• Legacy .NET / ASP.NET MVC systems modernized or rescued from technical debt
• Cross-platform mobile apps (React Native, Xamarin/MAUI) with high performance
Over 10 years and 131 projects, I've delivered:
- 7-figure SaaS platforms
- IoT dashboards & device integrations
- Turnaround projects that previous teams couldn't complete
Expert-vetted, responsive communication, clean code, and on-time delivery guaranteed.
Message me if you're facing tight deadlines, legacy pain, or need a versatile full-stack partner for your next venture.
Emanuel A.
has worked
.
$90/hr
100%
Job Success
$1M+ earned
Available now
Offers consultations
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Senior WordPress Developer. Reliable and responsive. Result-oriented work. On time.
"Top Rated Plus" Upwork premium freelancer, member of an Upwork PRO group.
14+ years skill in full-stack web site development (prototype, graphic design, front-end, back-end, SEO).
Back end experience: PHP (WordPress, Laravel), C# (ASP .NET MVC, Web API, Entity Framework, Orchard, Kooboo, Umbraco).
Front end experience: HTML5 / CSS3, SASS, LESS, Bootstrap 5, Html5 animation, JS, jQuery, AJAX, Json, Rest API, Angular 1-2-4, React.js, Vue.js, Node.js, Three.js.
Other experience: Windows/Unix Server administration, Git, Azure, AWS and cloud solutions.
In terms of WordPress can provide:
✔️ custom theme design or theme/template modification;
✔️ responsive HTML (will pass Google mobile-friendly test, work on any device and OS);
✔️ retina display support;
✔️ HTML5 animation if needed;
✔️ WordPress/Woo back end;
✔️ WordPress multisite and membership, BuddyPress, bbPress;
✔️ custom plugin development;
✔️ 3rd-party services and payment systems API integration;
✔️ SEO, make AMP compliant, setup CDN (Cloudflare);
✔️ support;
✔️ warranty.
Great experience with:
✔️ e-commerce;
✔️ payment systems integration (PP, Stripe, Authorize.net and similar);
✔️ Google Maps API (custom design, clusters, routing, radius, speed/time/distances calculation, etc.);
✔️ responsive CRM and dashboards, high-traffic web-projects;
✔️ experience with Microsoft Power BI.
Keep the warranty, always available, fast response and turnaround.
=== TAGS ===
WordPress Developer ; WordPress expert ; Fullstack developer.
$29.99/hr
100%
Job Success
$1M+ earned
Start of list.
End of list.
Innovative, passionate, and quick software developer and architect with deep knowledge of programming concepts and internals. 24+ years of hands-on industry experience in programming, designing, managing, & leading software projects & companies. Change agent, problem solver with a passion for technology; skilled in grasping the big picture, conceptualizing, developing & implementing solutions by partnering closely with business leaders. Worked for different type of industries, which includes Health-care Informatics, Lab Informatics, MOOC, Online Education, ERPs, Electronic Design Automation (EDA), Semi Conductor, Heavy mechanical manufacturing, Travel, Pharmaceutical & e-commerce.
Skilled in:
AI Agents | AI Voice Agents | AI Automation | AI Solutions | Specialized Local Custom AI Models
Python | PHP | Apex | Objective C | Java | C/C++ | Flex | ActionScript | JavaScript | Perl | VB6
iPhone SDK | Android SDK | BlackBerry SDK | Flex SDK | Sancha
Django | Django REST | Odoo | Web2Py | Zope | Plone | Open edX | CodeIgniter | .NET | Java EE
SQL Server | MySQL | PostgreSQL | Sybase | DB2 | SQLite | MS Access
Odoo | OpenERP | Salesforce CRM | MS SharePoint
git | SVN | CVS | VSS | Unfuddle
Scrum | UP | UML | CASE Tools | Poseidon | Rambaugh OMT
ASP.NET | ASP | Telerik
Visual C++| MFC | Win32 | COM | DCOM | OLE | Multithreading
ANT | JDK | Digester| Struts | Servlets | JSP | EJB | WebSphere | Eclipse
Web 2.0 | AJAX | CSS | XML | XSD
OpenSource | github
Knowledge Management | MediaWiki | PHP
Health-care Informatics | ICD9 | ICD10 | HIPPA | HL7
SEMI Standards | EFEM | SEMI E87 | SEMI E90 | SEMI E40 | Robotics | SECS/GEM | SCADA
Customs ERP | Landing Cost | HS Codes | WTO Standards
Lab Informatics | Bika | OLiMS | LiMS | LIS
Windows | MacOS | Linux | Ubuntu | Unix | EC2
Windows CE | Micro Controller Programming | Dynamic C
Yasir I.
has worked
.
$20/hr
100%
Job Success
$2M+ earned
Available now
Offers consultations
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Hello Clients, I help startups and growing companies build, fix and scale SaaS platforms, mobile apps and complex backend systems that actually work in production.
With 16+ years of experience and $2M+ earned on Upwork, as of now, I have delivered 500+ projects and worked over 19,000+ hours to help businesses launch stable, scalable and maintainable products used by real customers worldwide.
If you're dealing with:
• A half-built product that keeps breaking
• Poor code quality from previous developers
• Scaling issues or performance bottlenecks
• Complex APIs or third-party integrations
• Need to build MVP fast and correctly
I step in, take ownership and turn it into a clean, production-ready system.
💼 What I Deliver:
• SaaS platforms (from MVP to scale)
• Full-stack web applications (React / Next.js + Node.js)
• Mobile apps (Flutter / React Native – iOS & Android)
• AI-powered features & integrations (OpenAI, automation)
• API architecture & third-party integrations
• System redesign, optimization, and long-term scaling
⚙️ My Approach (Why clients stick with me):
1. Deep understanding of your business & goals
2. Clean architecture planning (not quick hacks)
3. Scalable, maintainable code
4. Transparent communication & regular updates
5. Long-term support & reliability
I don’t just “code features” I build systems that grow with your business.
🧠 Tech Stack:
Frontend: React.js, Next.js
Backend: Node.js, Express.js
Mobile: Flutter, React Native
Database: MongoDB, PostgreSQL, Firebase
AI: OpenAI APIs, AI integrations
Cloud: AWS, Firebase
If you’re serious about building or scaling your product, let’s talk.
I’ll help you define the right approach before we even start development.
$100/hr
100%
Job Success
$2M+ earned
Available now
Offers consultations
Start of list.
End of list.
Since 2019, I've connected early-stage startups with senior developers and designers who actually fit their culture and tech stack. No recruitment BS, no flaky freelancers, just people I've worked with and trust.
I run New Wave Devs, an engineering studio working with startups across the US, UK, Canada, Netherlands, and Norway. We do team augmentation, MVP builds, design work, and team rescue when things go sideways. Our engineers work directly with your team, usually onboarded in under a week, and you talk to the engineer, not a sales layer.
The bench runs deep. On the frontend, React, React Native, TypeScript, and Flutter. On the backend, Ruby on Rails, Node, Python, and .NET. Plus AI engineers shipping RAG and agentic workflows in production, along with designers, DevOps, and QA. Mostly SaaS, marketplaces, fintech, and mobile.
These aren't junior generalists. Our people have scaled Postgres past a billion rows, shipped Stripe Connect marketplace payments, built HIPAA-compliant health platforms, run native apps at over a million monthly users, and put RAG assistants in front of real customers. So whether you're shipping a first MVP or hitting your first real scaling wall, someone here has already done it.
Why people work with us: fast onboarding (1 to 7 days), engineers who match your culture, transparent pricing, and a track record of 100K+ in contracts with long-term clients who keep coming back.
$39/hr
100%
Job Success
$2M+ earned
Available now
Offers consultations
Start of list.
End of list.
✅ 100% Client Recommendation
✅ Top Embedded and Firmware developer
✅ Top Hardware designer
✅ Top Software design
✅ Top Mechanical design and industrial design
✅ Top Enclosure design
Services:
1) Hardware/Electronics design (Power, Analog, Digital/High-speed and RF electronics design)
2) Precertification testing (EMI, ESD, EMC, FCC, CE, UL)
3) Firmware design С/C++ (Bare metal MCU/MPU, FreeRTOS, Zephyr RTOS, Embedded Linux, Wireless protocols, Security, Interfaces, etc)
4) Industrial and Mechanical design (Enclosure design, 3D printing, IP standards, Prepare all for injection molding, etc)
5) UX/UI design (Embedded devices with displays, Mobile and Desktop applications)
6) Software design (Android, IOS, Linux kernel and user space development)
7) Embedded Quality Assurance(QA) and testing
8) Manual verification/testing PCB/FPC, functional and unit testing of the Firmware/Software, stress testing, temperature range testing
Service->Hardware design service:
- Power electronics design: (PFC, Solar charging controller, chargers, high voltage control, Motor controllers DC/AC/BLDC )
- Analog electronics design: High-accuracy analog measurements, Noise filtration, Digital to analog conversion, Amplifying signal
- Digital and high-speed electronics design: - Memories DDRx/LPDDRx, SDRAM, Camera and display interfaces (MIPI-DSI, MIPI-CSI, DisplayPort, etc), Data communication interfaces (QSpi, SPI, UART, I2C, FMC, I2S, USB 2/3.x, etc), (
- RF Designs: ( 50-60 GHz (Radars), 1-6 GHz (UWB, Wifi, BLE, ZigBee, GPS, NB-IoT, LTE-M/LTE, Z-Wave, etc), 13,6 MHz, 128 kHz (NFC, RFID, etc), 433 MHz (Custom protocols)
Service->Industrial and Mechanical design
- Industrial design of the sketch - it includes a few sketch designs, depending on the physical sizes of the device, specific of industry and user experience
- Mechnical CAD design with deep PCB integration - it includes full mechanical draw based on the industrial design with detailed sizes, materials and manufacturing specific.
- Thermal calculation and simulation - it includes simulation of the heating device inside enclosure, with theoretical cooling calculation
- 3D printing and verification - we use 3D printer hp jet fusion 5210, with a very nice quality of printing, that helps us to make a good verification of parts with PCBs
- Injection molding - the last step, which includes manufacturing optimization and making pres forms, preparing documentation for the manufacturing
Service->Firmware design С/C++:
- Languages: C/C++, Assembler
- Diagrams: Block, UML, Workflow, APIs
- Interfaces: I2S, SAI, MIPI-DSI, MIPI-CSI, USB 2/3.x, LTDC, DDR3/DDR4/LPDDR4, I2C, SPI/QSPI, UART, CAN, Ethernet
- Wireless: NB-IoT, LTE M, GPRS, GPS, LTE, UWB, WiFi, BLE, ZigBee, Z-Wave, LoRa, Thread, 6LoWPAN, Sub 1GHz, NFC (13,6 MHz), RFID 433 MHZ and 128 kHz
- Protocols : MQTT, HTTP, FTP, Modbus TCP/RTU, SNMP, TCP/IP, UDP/IP, DLMS, custom protocols
- Security: AES, SSL/TLS, custom algorithms
- Libs and frameworks: TouchGFX (GUI lib for MCU), emWin (GUI lib for MCU), LVGL (GUI lib for MCU), WolfSSL (SSL/TLS), Mbed TLS(SSL/TLS), osxMotionFX (Sensors fusion algorithm based on the Kalman theory), FatFS, lwIP (TCP/IP stack), WICED (Wifi stack), aws/amazon-freertos, Paho MQTT, TensorFlow
- Embedded OS: FreeRTOS, TI-RTOS, ZephyrOs, Embedded Linux, Yocto, ROS
- MCUs: NXP (i.MX RT1064, LPC1100, LPC4000), Nordic (NRF52xx/NRF53xx/NRF91xx), TI (CC3220/CC26xx/CC1100/CC3200, MSP430), Espressif (esp32, esp8266), ST(STM32H7/F7/F4/L4/F0/L0/WB/WL/G0 and STM8), Atmel/Microchip(SAM D20/D21/L21/R21/V70/V71, SAMA5/SAM4/SAMD4), Silicon Labs(EFR32, ZGM130S), Cypress (PSoC 3/PSoC 4), Kinetis (Family MK81FN256VDC15), Holtek (HT68xx)
- MPUs: Analog Devices (ADSP-2156x SHARC), Qualcomm (Snapdragon 625/425/610/845), Allwinner (A64, A33, H3, H6 series), NXP (I.MX6/I.MX7/I.M8) , ST(STM32MP1)
- SOMs: NVIDIA Jetson nano, NVIDIA Jetson Orin Nano, NVIDIA Jetson AGX Orin, Toradex (Colibri iMX6, IMX7, IMX8), Raspberry pi (CM3, CM4 modules), Inforce (Qualcomm Snapdragon 410, 820, 845 SOM), 8devices (Mango on Qualcomm IPQ6000/IPQ6010 Soc), Sensiedge(SensiBle 1 and 2, SensiLora)
Service->Software:
- Languages: Java, Kotlin, C#, C/C++, Python, Java Script
- Diagrams: Block, UML, Workflow, APIs
- Interfaces: USB, Ethernet
- Protocols : MQTT, HTTP, FTP, Modbus TCP/RTU, SNMP, TCP/IP, UDP/IP, DLMS, custom protocols
- Wireless: BLE, WiFi, UWB
- Security: AES, SSL/TLS
- Libs and frameworks: GStreamer, Paho MQTT, WolfSSL (SSL/TLS), Mbed TLS(SSL/TLS), QT framework, Xamarin Forms and Maui, ASP .NET Core and web development, React (web UI development), SQLite DB, FireBase DB, Mong DB, InfuxDB DB, Room, TensorFlow, Node.js
- OS: Android, IOS, Linux, Windows
United States
$75/hr
100%
Job Success
$1M+ earned
Start of list.
End of list.
25 years experience with 3 Microsoft certifications in Asp.net, C# and SQL.
Full-stack Web and Mobile Developer - Developed 14 MVPs to date.
Expert in .Net/C#, Blazor, Angular, React, Python and SQL
Patrick W.
has worked
.
$55/hr
100%
Job Success
$1M+ earned
Start of list.
End of list.
- Over 12 years of software development experience in various-sized projects;
- Strong experience in designing and developing OOP solutions using .NET platform;
- Solid experience in Sitecore CMS v6.5 - 9
- Great experience in business domain and functional requirements analysis, building appropriate architectural solutions;
- Strong experience in web-client technologies such as HTML, XML, JS, CSS;
- Good experience in system integration with .NET based Web Services;
- Experience in “spaghetti” code refactoring and business logic performance optimization;
- Experience in existing software support and maintenance;
- Technology domination was achieved in ASP.NET, Sitecore, ASP.NET MVC, MSSQL Server.
$40/hr
100%
Job Success
$1M+ earned
Offers consultations
Start of list.
End of list.
I develop .Net based web, mobile and desktop software applications and provide consultancy services.
My SUMMARIZED EXPERIENCE:
10+ yrs experience working with all things .Net such as Blazor, Blazor-Hybrid, .Net MAUI, ASP.Net MVC, .Net Core, Razor Pages, Web APIs, SignalR, XAF, cross-platform mobile apps (Xamarin, Cordova) and web services, WPF and Windows Forms with strong knowledge and deep understanding of software design patterns (IoC, DI, NInject, Unity) and best practices.
► HOW CAN I HELP YOUR DEV NEEDS?
If you are looking for a highly efficient, responsive and experienced FULL STACK software developer for a long term relationship, to take care of all your development needs, I am your guy.
► PROFICIENT software dev/design areas:
★ Blazor with Telerik and Syncfusion tools for blazor, ASP.NET Core, JWT Token Authentication, IdentityServer4, Razor Pages
★Blazor-Hybrid & .Net MAUI for cross-platform applications for Windows, Mac, iOS and Android
★ .Net/Core, ASP.net MVC, T-SQL, Web/Odata APIs, Owin Oauth, JWT, Web Forms, Java, WPF, DI. TDD
★ Kendo UI, Angular.js, Knockout.js, ChartJS, DevExtreme, Prototype.js, JQuery, Javascript, HTML5, CSS3
★ Express Application Framework (XAF) and Express Persistent Objects (XPO) Expert, Business Objects design, UI customization, Reporting, Scheduler & Dashboards with MSSQL, MySQL, SQLLite, SQL Compact, MS Access.
★ Telerik, DevExpress, Syncfusion, Infragistics, 3rd party dev tools, Syncfusion Blazor and Telerik Blazor Components
I have also performed functional testing using platforms such as qTest (QA Symphony) and I am well versed in test case design, requirements management and automated testing.
Additionally I am an expert on :
★ Inversions of Control/Dependency Injection, TDD, MVVM, multi-layered architecture.
★ Jira, Source Control (Git) (Github, Bitbucket), DevOps, Tortoise SVN
I take pride in strong debugging, re-factoring, problem solving skills with passion to solve complex business problems and delivering best & optimized solution for clients.
Feel free to contact to know more about my work and how I can help you.