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United States
$100/hr
$100K+ earned
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I'm a product designer who loves bringing clarity and simplicity to all things complicated. I love new challenges and I am always pushing my limits seeking something dull and boring and turning it into something new and exciting.
• I can create a design from start to finish (wireframes, mocks, user research, to high-fidelity design)
• I'm experienced in UI, UX, Wireframing, Prototyping
• I can also Art Direct and provide Design Consultation
If you wanna chat about opportunities, please write to irene@irenegeorgiou.com
$60/hr
100%
Job Success
$70K+ earned
Available now
Offers consultations
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Top Rated Plus on Upwork. $70K+ earned, 100% Job Success, 3,500+ hours across 3 multi-year retainers. I build vertical SaaS for construction, real estate / PropTech, logistics / 3PL, and AI / RAG SMB tools, on Next.js, Node, TypeScript, and Postgres.
That first line is the pitch. Here's the proof.
Shipped:
• TheBuildTrack: construction management SaaS with dynamic punchlists, daily logs, bid packages, and subcontractor portals. Cut project coordination time by ~70%, 20+ active projects.
• AllAmericanWarehouses: commercial real estate platform with interactive property search, CMS-driven content, and lead capture. 60% faster lead conversion, 80% less admin overhead, 8-week build.
• Ship Stampede: logistics / 3PL workflow tooling, live carrier rates, label printing, Shopify / Amazon / Cin7 integrations. Currently fractional CTO.
• QuickChat / Zesty / 500 Designs RAG work: AI documentation and support over retrieval-augmented search with sub-2-second response times in production.
Stack: Next.js, React, React Native, Node.js, TypeScript, PostgreSQL, Prisma, Tailwind. Currently Engineering Team Lead at Bee Techy LLC and founder of Medianeth Solutions, so I bring team-tested architecture, not solo-dev shortcuts.
How I work:
• One client at a time. When you hire me, you get a dedicated engineer, not a generalist juggling four jobs.
• I own the build end-to-end: schema, API, UI, deploy, post-launch.
• I write to non-technical founders the same way I write to CTOs. Plainly.
Best fit if you:
• Have a vertical SaaS stuck between MVP and v2, or a stalled internal tool with real users.
• Need someone who already speaks construction, real estate, logistics, or RAG instead of learning your domain on your dime.
• Want a 30 to 90 day engagement with a clear scope, not a forever retainer.
Not a fit for: WordPress builds, no-code prototypes, or agency white-label work.
Free 30-minute scoping call before any commitment. Send me the problem you're trying to solve and I'll respond within 24 hours.
$80/hr
$0 earned
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I am an iOS Engineer with 6 years of experience designing and developing high-performance applications. My expertise spans multiple areas, from creating intuitive mobile interfaces to implementing complex algorithms in machine learning. I have successfully contributed to projects across various sectors, including finance and insurance, enhancing user experiences and driving engagement.
I specialize in developing scalable and efficient iOS applications, leveraging the latest technologies to deliver top-notch solutions. Whether working on new features or optimizing existing functionality, I thrive on challenges and bring innovative ideas to the table.
If you are looking for a skilled iOS developer who understands both technical requirements and user needs, I would love to discuss how I can contribute to your project. Let's connect to explore the possibilities!
United States
$60/hr
$0 earned
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I’m a Full Stack Developer with 6+ years of experience building modern web and mobile applications. I specialize in React, React Native, Node.js, JavaScript, TypeScript, .NET, and SQL. I enjoy turning ideas into reliable, user-friendly applications and can help with everything from new features and integrations to debugging and improving existing projects.
$100/hr
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I'm an expert in mobile applications /games development with extensive experience in building high quality apps and games in Android, iOS, Xamarin, Cocos2dx and Unity3D.
I've 8+ years of experience range from building popular social apps, awesome puzzle and challenging business applications for Android, iOS and Xamarin as well as high performance guessing, escape and strategy games in Cocos2dx and Unity3D. I like working with team that cares about maintaining high programming standards and performance.
It's always been important to me to build long term relationships with clients, so I'm looking for long term projects. Upwork has recognized me as "Upwork Pro Mobile Developer" based on my skills and performance with 100% success rate.
I'm a full time freelancer and flexible with my working hours. It's more fun to me to stay in sync with other team members while working.
I look forward to hear from you!
United States
$90/hr
$0 earned
Available now
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I build production Flutter apps for iOS and Android, with a specialty in AI voice agents that place real phone calls — not chatbots that only type in a window.
WHAT I DO • Flutter mobile apps (iOS + Android, App Store / Google Play pipeline) • AI call automation with VAPI and secure cloud backends (Firebase / Cloud Functions) • Real telephony-style flows: outbound calling, appointments, bill payments, rent collection, customer support, negotiation follow-ups • Clean architecture so products ship and hold up when real users depend on them
WHAT I’VE BUILT I’m the sole developer behind Mickter Solutions and the creator of RYAN (R.Y.A.N. — Representing You As Needed), an AI calling assistant that dials utilities, banks, and service providers on the user’s behalf. I also build Taylor, a B2B PropTech-style AI calling product for property managers and small businesses — automated outreach, account/tenant context on calls, and a production mobile dashboard.
Public product showcases on GitHub (architecture + stack; production source stays private for security): • Link is in the UpWork linked accounts to see.
STACK I SHIP WITH Flutter · Dart · VAPI · Firebase / Cloud Functions · Node.js · iOS App Store Connect · Provider / GoRouter · practical Python tooling when needed
HOW I WORK Marine veteran. Disciplined, direct communication, no fluff. I care about clear scope, solid code, and apps that work when real people use them — not demos that only look good in a slide deck.
BEST FIT PROJECTS • Flutter MVP or full app that needs to ship • AI voice assistant / outbound call automation • Mobile + backend so keys and call logic stay secure off-device • Features that save users time: hold time, scheduling, collections, support routing
If that’s what you’re building, send a short note with:
1) the goal,
2) iOS / Android / both,
3) whether you need voice calling or mobile only.
I’ll tell you straight if I’m a fit and how I’d approach it
United Arab Emirates
$100/hr
$80K+ earned
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Information Security Professional with more than 10 years of hands-on experience in Secure code review, Threat modeling, Web & mobile application & API Security, Penetration Testing, Secure Architecture Reviews, Vulnerability Research and Exploitation.
I hold industry-recognized certifications like OSWE (Offensive Security Web Expert), OSED (Offensive Security Exploit Developer) and OSCE(Offensive Security Certified Expert). I also occasionally participate in vulnerability disclosure programs and have been rewarded by organizations like Google, Apple, ManageEngine, Microsoft, Adobe, Barracuda, Pinterest, Symantec, Oracle.
Areas of interest include web, mobile & embedded application security, reverse engineering & exploit development, code & architecture reviews, vulnerability research and security automation.
United States
$60/hr
$0 earned
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Experienced product-minded web and mobile developer.
13 years of React and React Native experience, including latest React Server Components, Expo, Redux, architecture/refactoring, high-throughput framerate optimization.
20+ years in the ruby/rails ecosystem, including recent job at Discourse, the largest open-source Ruby project.
Have delivered & managed several mobile apps using React Native, Objective C and Swift.
Architected, built and scaled an IOT app for sensing and lighting using React Native. Created CI/CD pipeline, managed Android + iOS app store presences over 5 years and dozens of releases.
Good design & product sense. Have mostly worked as a developer but have spent several years as a product manager as well.
$100/hr
100%
Job Success
$800K+ earned
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Featured on ReallyGoodEmails, my client portfolio includes brands such as Booking, Microsoft, Bloomberg, Chevron Gas, Ted Baker, IKEA, and JD Sports.
***** 60+ Five Star Reviews *****
***** 10,000+ Hours Worked on Upwork *****
***** 200+ Unique Clients *****
***** 99% Client Recommendation Rate *****
I help companies build revenue generating lifecycle email systems.
Over the past decade I have designed and implemented email programs for global brands, ecommerce companies, and SaaS platforms. My work focuses on turning email into a reliable revenue channel through lifecycle automation, conversion optimization, and scalable template systems.
Rather than simply designing emails, I work with teams to architect end to end lifecycle infrastructure, including onboarding, retention, re engagement, and transactional messaging.
What I help clients with
• Lifecycle email architecture
• Klaviyo automation and flow systems
• Conversion focused email design and UX
• High performance HTML email development
• Template systems for scalable campaigns
• A B testing and optimization frameworks
• Deliverability and list hygiene improvements
• Campaign strategy and lifecycle planning
Technical expertise
HTML email development with extensive cross client testing using Litmus.
Custom build systems and frameworks designed to dramatically increase development speed and maintain visual consistency across large email programs.
Platforms and technologies I work with include:
• Klaviyo
• Mailchimp
• Customer lifecycle automation systems
• HTML and CSS email frameworks
• React based UI systems when needed for marketing infrastructure
Typical projects include
• Building lifecycle email programs from scratch
• Auditing and optimizing existing email revenue systems
• Creating scalable template systems for large marketing teams
• Improving conversion and engagement through testing and UX improvements
If you are looking for someone who can move beyond individual email builds and help create a scalable lifecycle revenue system, feel free to reach out.
$60/hr
$0 earned
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I am a passionate developer whose focus in to deliver quality work for my clients and maintain a good relationship going forward. With many years experience as a full-stack developer in both MEAN, MERN, and WAMP stack, I bring in the expertise to work on your requirements to deliver Fully Crafted applications. Looking forward to working with you.