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$75/hr
100%
Job Success
$200K+ earned
Available now
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US-Based Principal Engineer | Zero Outsourcing | 25 Years in the Trenches
I provide the technical certainty that only comes from longevity. With over 100 projects completed on Upwork and experience dating back to the earliest days of the web, I build robust backend architecture that works the first time.
Current Featured Solution: Advanced Jobber & HubSpot Sync
I recently developed a custom Python listener & PHp-based integration for the service industry that automates:
Real-time Client Sync: (Create/Update) between HubSpot and Jobber.
Job Lifecycle Automation: (Create/Update) via high-performance webhooks.
If Zapier or native integrations are failing your workflow, I can build you a custom, resilient bridge.
Core Expertise:
Python & FastAPI: Modern, asynchronous, and strictly typed APIs.
API Integration & ETL: REST, GraphQL, and legacy SOAP services.
PHP & Backend Systems: Custom architecture, Laravel, and database optimization.
Data Architecture: Custom SQL design and complex JSON transformations.
Why Work With Me: You are hiring a Subject Matter Expert, not a junior developer. I do not outsource, I do not subcontract, and I do not require hand-holding. I translate business requirements into production-ready code that is documented and resilient.
$30/hr
95%
Job Success
$100K+ earned
Available now
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If you're looking for a 𝐌𝐄𝐑𝐍 𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 who thinks beyond shipping features and focuses on building software that continues to perform as your business grows, you're in the right place.
Most of my work has been on production applications where 𝐫𝐞𝐥𝐢𝐚𝐛𝐢𝐥𝐢𝐭𝐲, 𝐦𝐚𝐢𝐧𝐭𝐚𝐢𝐧𝐚𝐛𝐢𝐥𝐢𝐭𝐲, and 𝐬𝐜𝐚𝐥𝐚𝐛𝐢𝐥𝐢𝐭𝐲 matter every day. I don't just ask, "Does it work?" I ask, "Will this still be easy to maintain six months from now?" That mindset influences every technical decision, from application architecture and database design to API development and frontend performance.
As a 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 specializing in 𝐑𝐞𝐚𝐜𝐭.𝐣𝐬, 𝐍𝐞𝐱𝐭.𝐣𝐬, 𝐍𝐨𝐝𝐞.𝐣𝐬, 𝐄𝐱𝐩𝐫𝐞𝐬𝐬.𝐣𝐬, 𝐌𝐨𝐧𝐠𝐨𝐃𝐁, 𝐓𝐲𝐩𝐞𝐒𝐜𝐫𝐢𝐩𝐭, 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭, 𝐚𝐧𝐝 𝐀𝐈-𝐩𝐨𝐰𝐞𝐫𝐞𝐝 𝐰𝐞𝐛 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬, I help startups, SaaS companies, and growing businesses build products that are fast, secure, and designed for long-term growth.
𝐈'𝐯𝐞 𝐜𝐨𝐧𝐭𝐫𝐢𝐛𝐮𝐭𝐞𝐝 𝐭𝐨 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬 𝐢𝐧𝐜𝐥𝐮𝐝𝐢𝐧𝐠:
• SaaS Platforms
• Enterprise Applications
• CRM & ERP Systems
• Customer Portals
• Internal Business Tools
• Admin Dashboards
• AI-Powered Applications
• Real-Time Applications
• Multi-Tenant Systems
• Custom Business Software
Before writing code, I spend time understanding the business problem. In many cases, the best solution isn't the most complex one, it's the one that's easier to maintain, scales efficiently, and delivers value sooner. My role isn't simply to build features; it's to help make technical decisions that continue paying off as your product evolves.
𝐖𝐡𝐚𝐭 𝐈 𝐜𝐚𝐧 𝐡𝐞𝐥𝐩 𝐲𝐨𝐮 𝐰𝐢𝐭𝐡:
• Custom MERN Stack Development
• React.js & Next.js Applications
• Node.js & Express.js Backend Development
• REST API & GraphQL Development
• Third-Party API Integration
• AI/LLM
• MongoDB & PostgreSQL Database Design
• SaaS & CRM Development
• Enterprise Web Applications
• Authentication & Authorization (JWT, OAuth)
• Performance Optimization & Code Refactoring
• Cloud Deployment with AWS & Docker
• Bug Fixing, Feature Development & Long-Term Maintenance
I write clean, modular, and well-documented code with the next developer in mind. That means reusable components, clear project structure, meaningful naming, thorough error handling, and solutions that are easier to test, extend, and maintain over time.
Whether I'm joining an existing codebase or building a product from the ground up, I prioritize communication just as much as code. You'll always know where the project stands, what decisions are being made, and why. Clear communication, realistic timelines, and dependable delivery are as important to me as technical quality.
If you need a 𝐑𝐞𝐚𝐜𝐭 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫, 𝐍𝐨𝐝𝐞.𝐣𝐬 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫, 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫, or 𝐄𝐧𝐭𝐞𝐫𝐩𝐫𝐢𝐬𝐞 𝐌𝐄𝐑𝐍 𝐒𝐭𝐚𝐜𝐤 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫, who combines technical expertise with a practical understanding of business goals, I'd be glad to discuss your project.
𝐋𝐞𝐭'𝐬 𝐛𝐮𝐢𝐥𝐝 𝐬𝐨𝐟𝐭𝐰𝐚𝐫𝐞 𝐭𝐡𝐚𝐭'𝐬 𝐧𝐨𝐭 𝐨𝐧𝐥𝐲 𝐟𝐮𝐧𝐜𝐭𝐢𝐨𝐧𝐚𝐥 𝐭𝐨𝐝𝐚𝐲 𝐛𝐮𝐭 𝐚𝐥𝐬𝐨 𝐫𝐞𝐚𝐝𝐲 𝐟𝐨𝐫 𝐭𝐡𝐞 𝐜𝐡𝐚𝐥𝐥𝐞𝐧𝐠𝐞𝐬 𝐨𝐟 𝐭𝐨𝐦𝐨𝐫𝐫𝐨𝐰.
Associated with
10TURTLE LLC
$500K+
earned
$20/hr
100%
Job Success
Offers consultations
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👋 Who I Am
I am a Full Stack Developer & System Architect with 13+ years of experience delivering scalable, user-friendly, and business-focused software solutions. I have worked with clients worldwide, building everything from SaaS platforms and admin dashboards to multi-client portals and data migration systems.
I hold a Top Rated Plus badge on Upwork, earned by consistently delivering high-quality work and long-term results.
💡 Core Capabilities
🔹 System Architecture & Design
Translating business needs into secure, scalable technical solutions
🔹 Custom Development
PHP/MySQL (13+ yrs), Vanilla JavaScript, APIs, Integrations
🔹 Retool Expertise
Dashboards, client portals, employee management systems, and data tools with read/write capability and role-based permissions
🔹 Data Migration & Automation
Migrating 200k+ records securely
Converting binary data to JSON, ensuring integrity and compliance (PII/PHI)
Workflow automation using APIs, Zapier, Make
🔹 Database Proficiency
PostgreSQL, MySQL, Supabase, Snowflake or any
🔹 Leadership & Team Management
Experience leading dev teams
Can assemble and manage a new team based on project needs
✅ Why Work With Me
✔ Top Rated Plus on Upwork – trusted by clients for quality & reliability
✔ Hands-on + Strategic – I design systems, not just code features
✔ Flexible Technology Skills – can adapt to any stack required
✔ Timezone Flexibility – based in IST, but comfortable working PST/EST/EU hours
✔ Clear Communication – explaining technical details in simple, client-friendly terms
🚀 Selected Experience
SaaS Platform (South Africa) – built and scaled modules for inventory, accounting, and costing; system still running successfully today
Multi-Client Portal – designed and developed portals in PHP/MySQL and Retool with role-based permissions and integrated dashboards
Retool Dashboards – created finance, operations, and HR dashboards, cutting reporting time by 60%
Insurance Data Migration – managed migration of 223,000+ records (CSV + JSON), ensuring secure handling and client satisfaction
🎯 My Commitment
I am passionate about building systems that make businesses run smarter, faster, and more efficiently. Whether you need a Retool dashboard, client portal, SaaS platform, or complex data migration, I can deliver end-to-end solutions with clarity, reliability, and long-term vision.
📩 Let’s connect — I recommend a quick talk before you hire anyone. I’ll show you exactly how I can help turn your vision into reality.
Devdatt M.
has worked
.
$45/hr
$7K+ earned
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Experienced as a Full Stack Developer for 8+ years. Currently working on building ETL Pipelines and SQL report generation and Infrastructure as Code using terraform. Interested in opportunities that challenge and reward existing skill set.
Key Skills
Gained Experience in Working on AWS Platform
Building Pyspark / Pandas ETL AWS Glue jobs or AWS Lambdas
Building Nifi Flows
Generating SQL Reports
Creating Python Flask APIs with SQLAlchemy and Kafka
Deploying Docker containers
Enhance Midwich SaaS Monitoring platform with snippets built using Python to interface with REST /SOAP APIs of leading Audio Visual Vendor Equipment , ITSM Cloud Providers and Microsoft Azure.
Custom API Development using FLASK and DJANGO.
Experience Working on Full Stack Web Development in Flask and Django
Experience Working on Full Stack Web Development in Laravel/CodeIgniter
Experienced in Python ,PHP, REST API, REACT , SOAP, HTML/CSS , JS,AJAX , C#,LAMP Stack Architecture , JQuery, Bootstrap 5.0.
Experience creating Mobile App backend in Python
Integrate with industry leading ITSM Cloud providers such as Salesforce, ServiceNow, JIRA, ZendDesk, FreshService using REST API.
Knowledge of Full Stack JavaScript Development including Node.js, Express.js, Node Package Manager)
Knowledge of MVC Framework and Code Igniter / Laravel as a Framework
WordPress using Page Builders e.g Divi , Elementor , Beaver Builder , WPBakery , Visual Composer etc
WordPress custom Theme Development and plugin Development.
Version Control Software like Git and SVN using Github and BitBucket for storing the repositories
Relational Database Design and Development in MySQL and PostgreSQL
Experience with project management systems like Basecamp, JIRA, Slack.
$40/hr
100%
Job Success
$20K+ earned
Available now
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Highly experienced IT consultant, with strong technical writing background. Database design using industry-leading data modeling tools, such as Erwin. MS Access database design and development. Data architecture, data warehouse design / development, and data integration /conversion. Data and Process flow diagramming using Visio.
Technical writing tools include Word, Excel, PowerPoint, Visio, and Adobe Acrobat DC
Small business accounting services, including training in QuickBooks. Tax preparation using Intuit ProConnect Tax Online.
Raymond Preston D.
has worked
.
$25/hr
33%
Job Success
$40K+ earned
Offers consultations
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Hands on with server side solution using Spring, Hibernate, J2EE 7 and LAMP (PHP) stack for the last 15 years.
- Proficient with building distributed fault-tolerant, soft-real time, microservices based system using vert.x and dropwizard.
- Proficient with RDBMS like MySQL, PostgreSQL; NoSQL like Redis, Riak and JCR repositories like ModeShape.
- Proficient with UI and mobile hybrid apps like ExtJS 4/5, GWT 2.7, JQuery UI, JQuery Mobile, ExtJs Touch, Angular, Ionic and Cordova
- Hands on with "process" based and "case" based implementation using BPMN 2.0 and CMMN 1.0 using Camunda process engine.
- IOT sensor based solutions using Arduino/Raspberry PI/BeagleBone and analytics using Esper Complex Event Processing engine for realtime analytics less
> Proficient in Spring 2.x framework and AOP using AspectJ AOP framework.
> Proficient in building agent based systems using OSGI specs (Equinox and Knopflerfish containers)
> Dealt in indigenous and component-based J2EE based solutions for clients.
> Proficient in using OSS tools like Ant, Log4j, Tomcat, Hibernate, MySQL etc.
> Hands on different Operating systems including Linux, Solaris and Win2k.
> SCRUM and UML certified
$50/hr
100%
Job Success
$100K+ earned
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🏆 Top Rated Plus | 100% Job Success
🏆 Senior Infrastructure Engineer
🏆 Linux • Networking • Monitoring • Automation • Security Operations • Windows • DevOps
I help businesses design, troubleshoot, monitor, secure, and automate production infrastructure environments.
With 15+ years of hands-on experience across Linux systems, cloud infrastructure, enterprise networking, monitoring platforms, observability workflows, infrastructure automation, and security operations, I focus on solving complex operational and infrastructure challenges reliably and professionally.
━━━━━━━━━━━━━━━━━━
💻 Infrastructure & Linux Engineering
━━━━━━━━━━━━━━━━━━
✅ Linux administration (Ubuntu, Debian, AlmaLinux, CentOS, RedHat)
✅ Infrastructure troubleshooting & operational support
✅ Server hardening & patch management
✅ Performance tuning & infrastructure optimization
✅ Docker & containerized environments
✅ VPN deployments (WireGuard, OpenVPN, IPsec)
✅ DNS troubleshooting & infrastructure migrations
✅ NGINX, Apache, LiteSpeed optimization
✅ MySQL, MariaDB, PostgreSQL administration
✅ Infrastructure monitoring & operational visibility
━━━━━━━━━━━━━━━━━━
📊 Monitoring & Observability
━━━━━━━━━━━━━━━━━━
✅ Zabbix deployment, templates, alerting & monitoring
✅ Graylog centralized logging & syslog ingestion
✅ Infrastructure observability workflows
✅ SNMP monitoring & telemetry collection
✅ Infrastructure dashboards & alerting strategies
✅ Log parsing, visibility & operational troubleshooting
✅ Monitoring Linux servers, switches, VPS, cloud environments & infrastructure services
━━━━━━━━━━━━━━━━━━
🌐 Network Engineering
━━━━━━━━━━━━━━━━━━
✅ Arista & Cisco Nexus operational support
✅ VLANs, VRFs, routing & switching
✅ WireGuard & site-to-site VPN deployments
✅ A10 Networks & CGNAT operational support
✅ Network troubleshooting & operational visibility
✅ Firewall policy troubleshooting
✅ Infrastructure telemetry & monitoring integrations
✅ Infrastructure cabling & operational deployments
━━━━━━━━━━━━━━━━━━
☁️ Cloud & Infrastructure Operations
━━━━━━━━━━━━━━━━━━
✅ AWS infrastructure support
✅ Cloudflare integrations & DNS management
✅ EC2, VPC, RDS, Redis & infrastructure deployments
✅ Amazon SES, SPF, DKIM & DMARC configuration
✅ Email deliverability troubleshooting
✅ Cloud migrations & infrastructure onboarding
✅ Infrastructure automation using Bash & Python
━━━━━━━━━━━━━━━━━━
🔐 Security Operations
━━━━━━━━━━━━━━━━━━
✅ Vulnerability remediation support
✅ Security hardening & MFA enforcement
✅ Incident response & operational troubleshooting
✅ Malware cleanup & compromised server handling
✅ Infrastructure security baselines
✅ Operational security reviews
✅ ISO27001 / SOC2 / HIPAA operational support
━━━━━━━━━━━━━━━━━━
🛠️ Platforms & Technologies
━━━━━━━━━━━━━━━━━━
💻 Linux:
Ubuntu • Debian • AlmaLinux • CentOS • RedHat
🌐 Networking:
Arista • Cisco Nexus • WireGuard • VPN • VLAN • VRF • A10 Networks
📊 Monitoring:
Zabbix • Graylog • SNMP • Syslog • Telemetry
☁️ Cloud:
AWS • Cloudflare • DigitalOcean • Linode • Vultr
⚙️ Automation:
Bash • Python • REST APIs • Infrastructure Automation
━━━━━━━━━━━━━━━━━━
🚀 What You Can Expect
━━━━━━━━━━━━━━━━━━
✅ Clear communication
✅ Production-safe execution
✅ Strong troubleshooting methodology
✅ Clean documentation
✅ Long-term operational stability
✅ Infrastructure-focused solutions
✅ Reliable and professional support
I am comfortable working independently, collaborating with internal teams, troubleshooting production incidents, and supporting long-term infrastructure operations across enterprise and MSP environments.
Bladimir F.
has worked
.
$45/hr
90%
Job Success
$100K+ earned
Available now
Offers consultations
Start of list.
End of list.
𝐄𝐱𝐩𝐞𝐫𝐭-𝐕𝐞𝐭𝐭𝐞𝐝: 𝐓𝐨𝐩 𝟏% 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤
I have been in the IT industry for more than 12 years. Currently, I am the CEO of Wetelo, Inc., a successful software development company.
🚀 𝐖𝐞 𝐁𝐮𝐢𝐥𝐝. 𝐘𝐨𝐮 𝐒𝐜𝐚𝐥𝐞.
We help our partners grow by delivering tailored, full-cycle solutions — from idea validation to launch and beyond.
🏅 𝐑𝐞𝐜𝐨𝐠𝐧𝐢𝐳𝐞𝐝 𝐄𝐱𝐜𝐞𝐥𝐥𝐞𝐧𝐜𝐞
* 𝟑𝟎+ 𝟓-𝐬𝐭𝐚𝐫 𝐂𝐥𝐮𝐭𝐜𝐡 𝐫𝐞𝐯𝐢𝐞𝐰𝐬
* 𝐏𝐫𝐨𝐯𝐞𝐧 𝐒𝐮𝐜𝐜𝐞𝐬𝐬: Launched over 30 projects in the past year
𝐃𝐢𝐯𝐞𝐫𝐬𝐞 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐲 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞
💹 FinTech
🔗 Web3 Solutions
🎥 Media and Entertainment
🏡 Real Estate
🌱 Sustainability
🩺 Healthcare
🏋️♂️ Fitness & Wellness
🚛 Logistics
🎮 IGaming
🌐 Internet of Things (IoT)
𝗣𝗿𝗼𝗱𝘂𝗰𝘁𝘀:
💱 Cryptocurrency Exchanges (CEX) and Decentralized Exchanges (DEX)
🔱 Decentralized Finance (DeFi) Platforms
💼 Investment Management Software
📊 Financial Data Analytics Tools
📱 Decentralized Applications (DApps)
📹 Video Streaming Platforms
🏢 Real Estate Management Software
🌿 Carbon Footprint Tracking Apps
♻️ Renewable Energy Marketplaces
⚡️Renewable Energy Trading Platform
🗑️ Waste Management Solutions
📈 Healthcare Platforms
🏃 Fitness Tracking Apps
🚚 Transportation Management Systems (TMS)
📦 Warehouse Management Software (WMS) and Inventory Management Systems
🎲 Sports Betting Websites
📈 Betting Exchange Platforms
📱 Telegram Mini Apps
🎮 TON Games
📲 IoT Device Management Solutions
🧑💻 𝐓𝐞𝐜𝐡 𝐰𝐞 𝐥𝐨𝐯𝐞:
🔸 JavaScript, TypeScript, Next.js, Node.js, Nest.js, React, Express.js, Redux. React Native, three.js,
🔸Rust, Solidity, Web3.js
🔸PHP, Yii, Symfony, Laravel
🔸HTML5, CSS3
🔸 MySQL, PostgreSQL, MongoDB, JSON, XML, RESTful API
🔸 Git, Jira, Slack, Linux, AWS.
Experience our comprehensive product development and outsourcing/outstaffing services driven by cutting-edge technologies.
🌟 Discover why our clients rave about us with our 𝐫𝐞𝐯𝐢𝐞𝐰𝐬.
🚀 Dive deep into our 𝐬𝐮𝐜𝐜𝐞𝐬𝐬 𝐬𝐭𝐨𝐫𝐢𝐞𝐬 and 𝐩𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨 to witness our impact firsthand.
🤝 𝐇𝐢𝐫𝐞 𝐮𝐬 today to unlock unparalleled innovation and growth for your business.
Yurii F.
has worked
.
Associated with
Wetelo🥇Top rated JS, AI & Web3 experts
$400K+
earned
Indonesia
$20/hr
100%
Job Success
$30K+ earned
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I have many experience developing custom database using Filemaker.
All application can be accessed by all platform OS, like Mac, Windows, iOS, Android by webdirect.
I can help you create system application from scratch or improve existing application as your business process flow with best UI/UX interfacing.
Feel free to discuss with me.
Associated with
ICTech Solution
$10K+
earned
$125/hr
100%
Job Success
$100K+ earned
Available now
Start of list.
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EXPERT-VETTED (TOP 1%) | 100% JOB SUCCESS
Most AI projects look finished in a demo, then break in production.
I build production-grade software. That means it holds up with real users :
Scales under real traffic, not just a demo
Secure and tested, not "looks fine, ship it"
Clean architecture your next hire can build on
Costs you can predict before you commit
25 years building software. Now my team and I direct AI agents across the full build and review every line before it ships. Fast, but not vibe coding.
I AM A FIT IF YOU
Have an idea but no technical leadership to run the build
Have a vibe-coded app generating MRR but need a stable foundation under it
Started building but need architecture and senior oversight to finish
Want to use AI without losing control of your codebase
REAL RESULTS
A traditional build was quoted at $1.2M. My team and I delivered it for $95K, same scope.
Replaced a client's manual spreadsheet process with a web app. Revenue up 71%.
Architecture that held through 500% traffic growth
79M pricing calculations a month, in production
WHAT WORKING WITH ME LOOKS LIKE
Full team: I bring engineers, a product owner, a designer, and QA. I lead the architecture. AI executes. Nothing ships without senior review.
Advisory: I come in as your technical advisor. Same judgment, scoped to what you need.
Either way, there's a senior engineer on it from the first call to the final release.
RECENT PROJECTS
Automotive SaaS: A real-time pricing platform running 79M price combinations a month 24/7.
AI Knowledge Platform: A voice-first knowledge platform that works offline at sea. Captures what senior crews know and makes it searchable for the next crew.
Live broadcast with AI: A multi-agent engine that writes and narrates stories live, adapting to the audience in real time.
TECH STACK
AI/ML: LLMs, RAG, vector search, multi-agent orchestration Backend: Python, Node.js, TypeScript Frontend: React, React Native, Unity Cloud: AWS, Docker, Kubernetes Data: SQL, NoSQL, vector DBs
BEFORE YOU COMMIT TO ANYTHING
Book 30 minutes with me directly. Honest feedback on feasibility, realistic cost, and fit. No pitch. No commitment. NDA first.
Associated with
RSM Studio