Hire the Best Enterprise Software Developers
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Khadija B.

Fairfax, Virginia

$30/hr
5.0
6 jobs

Software Developer with 6 years of experience building production grade applications for companies in the area. I specialize in the Microsoft tech. stack. I enjoy solving complex technical challenges while continuously expanding my skill set. My technical experience includes C#, .NET, Microsoft SQL Server, React, database design and data modeling. I take pride in writing clean, maintainable, and scalable code while collaborating effectively with cross-functional teams to deliver high-quality software solutions. Adaptable, resourceful, and driven by continuous learning, I'm always eager to take on new challenges and quickly master the tools and technologies needed to deliver successful projects.

  • Java
  • C#
  • Python
  • JavaScript
  • Microservice
  • Ember.js
  • Software Debugging
  • Database
  • Back-End Development
  • Front-End Development
  • .NET Stack
  • Software Testing
  • Software Development
  • Enterprise Software Development
  • REST API
Kanai A.

Oakland, California

$95/hr
5.0
6 jobs

I build the system that turns missed calls and dead website traffic into booked jobs: an AI agent that answers, qualifies and books, wired into the site, the calendar and the CRM. Most businesses lose revenue in the same two places. Nobody answers after hours, and the website doesn't convert the people who do land on it. I fix both as one system instead of two projects. WHAT I BUILD • AI voice agents and AI receptionists that answer, qualify, escalate real emergencies, and book directly into your calendar. Twilio, OpenAI API, calendar and CRM integration. • AI chatbots and RAG assistants trained on your own documentation, so they cite your policies instead of inventing them. • Workflow automation in n8n, Make and Zapier: lead routing, qualification scoring, CRM sync, with alerting so nothing fails silently. • Missed-call text-back and automated review generation. • Websites and web apps in Next.js, React, TypeScript, Tailwind and WordPress, built for conversion and local search rather than decoration. • Full-stack SaaS. I designed, built and shipped MealPreppi, a multi-tenant AI meal-planning app on Supabase with role-based permissions enforced in Postgres RLS, realtime sync across households, and an AI planner that reads leftovers, cook rotation and each member's macro targets. MEASURED, NOT CLAIMED • 100% Job Success Score. • A 28-page WordPress lead-generation site scoring 100/100/100 on Lighthouse across five page types. LCP 0.5s, CLS 0, TBT 0ms. • A cinematic scroll site where I found a repaint bottleneck and took worst-frame render time from 1055ms to 39ms. • A canvas scrub engine tuned from 70ms to 29ms p95, verified on both GPU and software rendering harnesses. • Six-plus years front-end. Day job: front-end developer for the Alameda County District Attorney's Office, where I have led multiple full rebuilds of public platforms serving 30,000+ monthly users, improved performance by up to 30%, refactored legacy systems of 20,000+ lines, and driven three county websites from below WCAG A to full WCAG 2.1 AA under DOJ-mandated standards. Government work is unforgiving about performance, accessibility and not breaking URLs. That turns out to be exactly what local search rewards too. WHO I WORK WITH Service businesses and trades: HVAC, plumbing, electrical, tree service, locksmiths, med spas. Plus agencies and founders who need an automation or integration built properly rather than bolted on. WHAT THINGS COST AI automations and integrations: $300 to $1,500 AI agents, voice receptionists and booking systems: $1,500 to $5,000 Websites and web applications: $2,000 to $8,500 Ongoing tuning and management: from $299/month Fixed price wherever the scope allows it, so you are not carrying the risk of how long it takes. HOW I WORK I build before I pitch. Several pieces in my portfolio are complete, deployed sites I built to win the job rather than after winning it. I would rather show you working software than a list of adjectives, and it means you can judge the quality yourself instead of taking my word for it. I tell you what I found even when you didn't ask. Every project closes with numbers: what it produced, what it recovered, and what is still exposed. If you already know what is broken, send me the specifics and I will tell you exactly what I would build and what it would cost. B.S. Computer Science, CSU East Bay · CompTIA CySA+, certified May 2026 · 6+ years front-end

  • AI Agent Development
  • AI Chatbot
  • API Integration
  • n8n
  • OpenAI API
  • Full-Stack Development
  • Automation
  • React
  • TypeScript
  • Artificial Intelligence
  • Web Development
  • Web Application Development
  • Progressive Web App
  • Node.js
  • Landing Page
  • Search Engine Optimization
  • CRM Software
  • Prompt Engineering
  • Supabase
  • PostgreSQL
Numan U.

Sacramento, California

$40/hr
4.8
69 jobs

𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗣𝗹𝘂𝘀 | 𝟭𝟬𝟬% 𝗝𝗼𝗯 𝗦𝘂𝗰𝗰𝗲𝘀𝘀 | 𝟭𝟯+ 𝗬𝗲𝗮𝗿𝘀 | 𝟴,𝟬𝟬𝟬+ 𝗨𝗽𝘄𝗼𝗿𝗸 𝗛𝗼𝘂𝗿𝘀 | $𝟮𝟬𝟬𝗞+ 𝗘𝗮𝗿𝗻𝗲𝗱 | I'm a senior .NET / C# developer and Azure cloud architect who builds and scales production systems for companies that can't afford downtime or rework — healthcare platforms, fintech products, e-commerce systems, and real estate/property-management software. If your project needs more than someone who writes code to spec — if you need someone who can architect the solution, own the delivery, and still be there for support six months later — that's the role I take on. WHAT I BUILD ──────────────────────── ✦ SaaS Platforms — multi-tenant, subscription-based .NET Core / Azure applications built to scale from a handful of users to enterprise volume ✦ Healthcare Systems — HIPAA-aware EHR/EMR platforms, HL7/FHIR integrations, and clinical workflow tools built to compliance standards ✦ Fintech & Payments — secure transaction processing, Stripe/PayPal integrations, reporting and reconciliation systems, PCI-conscious architecture ✦ E-Commerce Platforms — custom storefronts, order/inventory management, and integrations with payment gateways, CRMs, and ERPs ✦ Real Estate & Property Management Systems — listing platforms, tenant/lease management tools, and workflow automation for property teams ✦ AI-Powered Features — OpenAI/LLM integrations, intelligent document processing, and AI-assisted workflows added to existing .NET applications ✦ Legacy Modernization — turning outdated ASP.NET/VB.NET systems into maintainable, cloud-ready .NET 8 platforms without breaking what already works TECH STACK ──────────────────────── + Backend: C# · .NET 8 / .NET Core · ASP.NET Core · ASP.NET MVC · Web API · Entity Framework Core · LINQ · Blazor · SignalR · Microservices · REST & SOAP APIs + Frontend: Angular · React · TypeScript · JavaScript · HTML5 · CSS3 · Blazor UI + Cloud & DevOps: Microsoft Azure (App Services, Functions, AKS, Service Bus, Key Vault, Azure SQL) · AWS (EC2, Lambda, RDS, S3) · Azure DevOps · GitHub Actions · CI/CD · Docker · Kubernetes · Infrastructure as Code + Databases: SQL Server · PostgreSQL · Cosmos DB · MongoDB · Stored Procedures & Query Optimization for high-volume systems + Integrations: Stripe · PayPal · Twilio · SendGrid · OAuth 2.0 · HL7 · FHIR · CRM/ERP integrations HOW I WORK ──────────────────────── I stay involved from architecture through deployment — writing clean, documented, production-ready code, and communicating progress clearly at every step. I manage scope, timelines, and stakeholder expectations as carefully as I manage the codebase itself. Depending on what your project needs, I can work as a hands-on senior engineer, a solution architect, or a long-term technical lead. I'll tell you honestly, early, if I'm the right fit for what you're building. Send me your project scope and I'll respond within a few hours.

  • C#
  • Microsoft Azure
  • Azure DevOps Server
  • ASP.NET
  • ASP.NET MVC
  • ASP.NET Core
  • .NET Framework
  • AWS Development
  • Azure DevOps
  • DevOps
  • ADO.NET
  • Microsoft SQL Server
  • Web Form
  • ASP.NET Web API
  • .NET Core
  • VB.NET
  • .NET Stack
  • Azure App Service
  • Angular
  • DevOps Engineering
Micah L.

Encinitas, California

$275/hr
5.0
47 jobs

Enterprise Software Architect and Fractional CTO passionate about solving intricate problems and skillfully mastering complex technical challenges. Creative thinker innovating digital tools, building blocks, and abstractions that segue into powerful, connected, and elegant systems. Expert at solving multifaceted, robust technical difficulties while maintaining a friendly, responsive, and business-oriented approach to projects. Understands both the full technical scope and business-side of obstacles with a knack for big-picture problem solving. Expert-Vetted on UpWork and Top Rated Plus with a 100% Job Success Score.

  • Enterprise Software
  • Performance Optimization
  • Python
  • Django
  • Celery
  • Software Consultation
  • SQL
  • Software Architecture & Design
  • Application Integration
  • React
  • TypeScript
  • Software Architecture
  • Enterprise Software Development
  • Enterprise Resource Planning
  • Enterprise Architecture
  • Bot Development
  • Slack
  • PostgreSQL
  • JavaScript
  • Python Asyncio
  • SQLAlchemy
  • Redis
Martin P.

Golden, Colorado

$135/hr
5.0
62 jobs

Pell Software is a 100% US-based software development specialist based in Denver, Colorado focused on partnership and reliable, long-term support. About Us: • 100% US-based — Full-time staff, never outsourced • Prebuilt software templates — Save time & money • 70+ Perfect 5-Star Reviews! — Service-oriented approach • Long-term Partnership Focused — Collaborate directly with software engineers ———————————————————— What We Do: • API Integrations • Custom web programming • AI Development, AI-First Software Development • HIPAA compliant software & integrations • Web portals • Work management systems • Business portals & utilities • Middleware systems • eCommerce solutions • PWAs & desktop apps ———————————————————— Our Tech Stacks: • Microsoft: .NET Core, C#, VB, WebForms, MVC, Razor Pages, Blazor, Azure, MSSQL, Visual Studio, TypeScript • LAMP/WAMP: PHP, MySQL, Linux, Apache • Frontend: Vue, Angular, React, Boostrap • Ruby: Rails, Postgres • Other: git, Jira, Confluence, HTML, Javascript, jQuery, Claude Code, AI Software Development ———————————————————— Platforms & APIs: Authorize.NET, SagePay, MINDBODY Online, Brantree, PayPal, Amazon Pay, Fedex, UPS, FreightQuote, QuickBooks Online, QuickBooks Enterprise, Sage 100, Sage 300, Sage Cloud, Sage Intacct, Acumatica, ClubOS, Active Campaign, SharpSpring, Facebook, Google, FirstData, Counterpoint, Moneris Payments, Braintree, PaceJet, TaxJar, Avalara, Amazon, Facebook, Google, QuickBooks Online, MINDBODY Online, Active Campaign, SharpSpring, QuickBooks Commerce, Counterpoint, UPS, FedEx. ———————————————————— Pell Software, LLC *Check out our reviews online!*

  • JavaScript
  • PHP
  • WordPress Plugin
  • Payment Gateway Integration
  • Ecommerce Website Development
  • API Development
  • ASP.NET Web API
  • ASP.NET MVC
  • C#
  • Intuit QuickBooks
  • Sage
  • Sage 300
  • Custom App
  • Enterprise Resource Planning
  • API
Sanjay S.

Cupertino, California

$95/hr
4.9
286 jobs

I have experience in building custom software solutions tailor-made to your requirements. My skill-set spans multiple domains like financial, healthcare, eCommerce, advertising, education, life sciences, hotel/hospitality, media and entertainment, retail, real estate, sports and fitness, mobile and wireless, technology, non-profit and more industries. I use structured programming incorporating leading & tested frameworks, best programming practices, coding guidelines and standards. As the technology advances gradually and the programming landscape changes globally, inorder to accommodate the world's growing technological needs, I constantly evaluate the latest trends in the development community and try to constantly improve and upgrade my skills to provide my clients the best possible development solutions.

  • .NET Framework
  • PHP
  • Database
  • Python
  • React
  • Angular
  • AJAX
  • ChatGPT
  • Google Cloud Platform
  • Facebook Development
  • Google Map Maker
  • Linux System Administration
  • Moodle
  • OAuth
  • Open Source

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