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$36/hr
86% Job Success
$200K+ earned
Available now
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I am passionate about software development...it’s not just my career, it’s my hobby. I have more than 18 years of experience. I'm based in Costa Rica, Central America; one of the most educated countries in the whole of Latin America. I'm constantly striving to learn new things and improve. I DO follow industry news, regularly tinker with new technologies, and read books and blogs to keep my skills current. - I work well alone or within a team environment and enjoy working with my colleagues. - I always use GitHub to keep track of my code and push commits daily - I am fluent in English and Spanish and I'm learning German as a third language, I always write documentation for the code I write and comments. Please, feel free to contact me and let's discuss further details of your projects.
Randall V. has worked .
AlienCat Software
Associated with
AlienCat Software
$40K+
earned
Roberto M.
$40/hr
100% Job Success
$600K+ earned
Available now
Offers consultations
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Hi I'm Rob and I help founders and product teams turn messy AI/SaaS ideas into clear, usable prototypes fast enough to validate, pitch, build, or hand off to developers. I’m not just here to make screens look better. I usually work with founders who need someone practical: someone who can understand the product, simplify the flow, design the UX/UI, think through edge cases, and create something that can actually move the project forward. My work usually fits when you need help with: - AI/SaaS product prototypes - MVP UX/UI and product flows - Figma designs that are ready for developers - Product redesigns for existing platforms - Founder-led product iteration - UX cleanup for complex workflows - Design systems and scalable product UI - AI-assisted prototyping workflows using tools like Claude, Cursor Codex, Lovable, Figma, and Figma Agent and Figma Make Past and current work includes AI-powered apps, content automation platforms, SaaS dashboards, marketplace flows, and founder-led product builds. For example, I’ve worked on products like Orcaru, an AI/content automation platform, and Nuvro, an AI-powered nutrition app, helping translate early product ideas and requirements into clearer UX, usable product flows, and execution-ready designs. I’m especially useful if you already have an idea, rough product, internal tool, or early MVP, but need someone to bring structure, speed, and product thinking to the next version. If you need a practical product/design partner who can help you move from idea to prototype and then clearer product direction, I can help.
Roberto M. has worked .
Pengyi Labs — UX/UI Prototyping and Front-end Support
Associated with
Pengyi Labs — UX/UI Prototyping and Front-end Support
$500K+
earned
Braulio B.
$30/hr
100% Job Success
$60K+ earned
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Senior Full-Stack Engineer with 11+ years of experience building production-grade web and mobile applications. My core stack covers TypeScript, React, React Native (Expo), Next.js, Vue.js, Node.js, .NET/C#, PostgreSQL, and AWS. I've delivered across a wide range of projects: a multi-provider auth system on AWS Cognito with Apple, Google, and Facebook identity linking; a React Native fintech app with biometric auth and real-time data sync; complex SOAP/REST API integrations on .NET backends with EF Core; and a Web3 platform with dual wallet flows using wagmi v2 and OnchainKit. Beyond writing code, I take ownership of architecture decisions, API design, and CI/CD setup — contributing at every layer of the stack. I work best with async teams that value technical clarity and independent execution. If you need someone who can take a feature from spec to production without hand-holding, let's talk.
Daniel V.
$50/hr
100% Job Success
$50K+ earned
Offers consultations
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Most products don’t have a growth problem. They have a systems problem. Growth becomes unpredictable when acquisition, product experience, and monetization are disconnected. I build systems that fix that by aligning: 🎯 How you acquire users 🎯 What they experience inside the product 🎯 How that value turns into revenue and retention So growth stops being random and starts becoming engineered and repeatable. 𝐒𝐨𝐦𝐞 𝐏𝐚𝐬𝐭 𝐖𝐢𝐧𝐬: 🎯 Defined commercial viability across 25+ early-stage startups through GTM execution. 🎯 Increased course completion by 60% by redesigning product UX and behavioral loops 🎯 Reduced churn by 45% by improving retention systems and user motivation architecture 🎯 Made $5k in profit from UX research while validating my own product across 6 countries with $150 in ad spend 𝐖𝐡𝐚𝐭 𝐈 𝐀𝐜𝐭𝐮𝐚𝐥𝐥𝐲 𝐃𝐨: I’ve worked across the full product lifecycle: from discovering demand, to scaling engagement, to fixing growth leakage, to strengthening business systems. That means: ⚙️ Aligning market positioning, product experience, and business model to reinforce each other. ⚙️ Diagnosing where growth is breaking down ⚙️ Designing revenue and retention systems ⚙️ Improving positioning and acquisition ⚙️ Building engagement loops and behavioral systems ⚙️ Leverage agentic AI to enhance workflows 𝐓𝐨𝐨𝐥𝐬 & 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬: 🛠 Tools I Use: Figma • Miro • Notion • ClickUp • Replit • Lovable • Claude Code • WordPress • Airtable • Make 📚 Frameworks I Apply: Octalysis Framework • Gamification Design • Hooked Model • Design Thinking • Hero’s Journey • Inbound Marketing 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐇𝐢𝐫𝐞 𝐌𝐞: ✔️ I diagnose structural problems, not just surface symptoms ✔️ I connect market positioning, product experience, and business model into one system ✔️ I combine systems thinking with hands-on execution ✔️ Gamification and behavioral design specialist with documented results ✔️ Battle-tested across 25+ real products under real constraints 𝐋𝐞𝐭’𝐬 𝐖𝐨𝐫𝐤 𝐓𝐨𝐠𝐞𝐭𝐡𝐞𝐫: If your product isn't converting, retaining, or growing the way it should, the problem is almost always structural. I identify where the system is breaking and redesign it so growth becomes predictable. Let's talk.
$34/hr
100% Job Success
$2K+ earned
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SaaS start ups are losing money when... Customers paid but access didn’t update, or the subscription were supposed to be renewed but the system didn’t react... EVEN when a cancellation happened but the user kept access... Let's be honest... your company is losing money and you are getting a headache. Let’s turn that stress into success! I help SaaS teams make sure that every payment process reliably triggers what should happen next: subscriptions, access, users, and billing state without manual fixes or late-night debugging. So you can stop losing money and hair. What this fixes for you: • Late night debugging • Payment system stay in sync • You can focus on what matters: Scaling Typical situation I’m brought into: Stripe is “working,” but: • Webhooks fail silently • Subscription state desyncs from your app • Edge cases pile up as revenue grows The team doesn’t trust the billing flow anymore What changes after: Payment → subscription → access becomes a single, reliable flow Your team stops patching issues manually Revenue operations become predictable instead of fragile How I usually help: • Stabilize Stripe & System Payments • Fix broken post-payment logic • Make access and billing state deterministic If payment reliability matters to your SaaS, we should talk, just send me: The one billing issue you can’t afford to ignore.
Bryan S.
$30/hr
100% Job Success
Available now
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𝗪𝗲𝗹𝗰𝗼𝗺𝗲! You wouldn't be here if you were not passionate about your project, and you deserve a web presence that matches that dedication. But turning an idea into a functional, user-friendly web application can seem complex. You might be wondering: Is this feasible? What's the real effort? How long will it take? Can my vision truly become a reality? 𝗪𝗵𝗮𝘁 𝗖𝗮𝗻 𝗜 𝗛𝗲𝗹𝗽 𝗬𝗼𝘂 𝗪𝗶𝘁𝗵: - Use modern and free web frameworks to plan, test, and implement web-based applications. - Expertise with easy and low-cost Microsoft technologies for reliable and familiar implementations. - Act as a technical advisor, providing guidance on software development challenges. - Perform code reviews to meet the best development practices and techniques. - Fix issues and bugs in existing software and add new features based on business requirements. - Actively participate in the project lifecycle, including requirements gathering, design, coding, and testing. 𝗕𝗼𝗼𝗸 𝗮 𝗳𝗿𝗲𝗲 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻 𝗰𝗮𝗹𝗹: In my childhood, I used any money I could get by browsing and playing online at the now-extinct Internet cafés. Now, I'm the person who loses track of time creating stylish and interactive web pages with the goal of making people's lives easier. Let's connect and build that great application you have in mind!
Bryan S. has worked .
Alfredo G.
$80/hr
100% Job Success
$30K+ earned
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I'm a full-stack SR developer with over 10 years of experience and most recently focusing on Web3 integrations and pixel-perfect frontend development using mostly React, WordPress, Node, Strapi or PHP/Laravel depending on requirements. I am very confident in my skills and am sure I can do pretty much anything frontend-wise, as well as being very proficient in backend. Although I have my own agency, I am available here as a freelance developer. But through my company, 5e Labs, I can also provide additional devs with similar expertise and very good UX/UI designers. Co-Founder of 5e Creative Labs, a web and software development agency located in San José, Costa Rica. Focused mostly on above technologies: Web3 integrations, AI, Node, React, Laravel and WordPress. Also co-founded eTax, a VAT compliance and electronic invoicing SaaS which was acquired in 2020. In terms of Web3 integrations, I have experience with blockchain development, building NFT marketplaces, NFT generators with bulk minting, auctions, etc. I have worked with a range of technologies, including Ethers.js, Web3.js, Polygon, Ethereum, Deso, among others. As a developer, I take pride in my ability to deliver high-quality, pixel-perfect solutions that meet my clients' needs. I also like to stay up to date with the latest technologies and trends in the industry, so I can quickly learn pretty much anything dev-related.
Treisy J.
$25/hr
100% Job Success
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🚀 Accelerate your software delivery by 60% with proven Agile leadership from Fortune 500 companies and high-growth startups, backed by deep technical expertise. I'm a Certified Scrum Master (CSM) and CAPM who transitioned from over 10 years as a Senior Web Engineer to Agile leadership, bringing unique technical credibility that accelerates team performance and removes blockers faster. **WHAT I DO:** ✅ Agile Transformation & Change Management ✅ Sprint Planning, Daily Standups & Retrospectives ✅ Backlog Refinement & Release Management ✅ Cross-Functional Team Leadership (4-16 developers) ✅ JIRA/Confluence Setup & Workflow Optimization ✅ Product Owner Coaching & Stakeholder Management ✅ Scrum@Scale Implementation for Multiple Teams **PROVEN RESULTS:** - Reduced delivery time by 60% through process redesign - Cut PI Planning meetings from 8 to 3 hours (60% time savings) - Increased team velocity by 40% using Scrum@Scale - Decreased defects by 25% via continuous improvement initiatives - Shortened release cycles from 2 months to 30 minutes - Improved product delivery by 20% through effective backlog management - Enhanced team engagement by 50% creating psychologically safe environments **INDUSTRIES SERVED:** Technology • SaaS • Enterprise Software • FinTech • Marketing Agency **WHY MY TECHNICAL BACKGROUND MATTERS:** Unlike typical Scrum Masters, my 10+ years as a developer mean I: → Understand technical debt and architecture decisions → Can evaluate story complexity and estimate accurately → Remove technical blockers without endless escalations → Speak the engineering team's language, earning immediate trust → Bridge business requirements with technical feasibility **CERTIFICATIONS:** - Certified Scrum Master (CSM) - Scrum Inc. - Scrum@Scale Practitioner - Scrum Inc. - CAPM - Certified Associate in Project Management (PMI) - Agile Metrics for Success - Project Management Institute - MBA in Business Administration (in progress) **CAREER PROGRESSION:** → Scrum Master at Fortune 500 tech corporation (2022-2025) → Scrum Master & Development Lead at SaaS startup (2021-2022) → Scrum Master & Senior UI Engineer at SaaS startup(2019-2022) → 10+ years in technical roles: Developer, Architect, Technical Lead **TECHNICAL EXPERTISE:** Frontend: React, NextJS, TypeScript, JavaScript, HTML5, CSS3 Backend: Python, Django, Node.js, SAP/ABAP, PHP Tools: JIRA, Confluence, Git, 🌎 **100% BILINGUAL:** English (Professional) | Spanish (Native) **AVAILABLE FOR:** - Ongoing Scrum Master services - Agile transformation consulting - Sprint facilitation & team coaching (hourly or per-sprint) - JIRA/Confluence setup & process optimization Let's discuss how I can help your team achieve consistent Sprint goals and deliver business value faster. Send me a message to schedule a consultation call.
$25/hr
$90K+ earned
Offers consultations
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I am a very professional developer with more than 8 years of experience. I have built many websites, applications, automation scripts, and bots. I am always concerned about delivering the best product and bringing value to the customer. I ensure an immaculate, maintainable, and scalable software, always based on the most recent technologies and best practices of the industry. I am very friendly and I will be glad to work with you, handling new challenges.
Carlos H. has worked .
Tiims Revolution
Associated with
Tiims Revolution
$1K+
earned
Daniel H.
$60/hr
100% Job Success
$200K+ earned
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I am a Software Engineer with 15 years of experience in application development and infrastructure. Over the years, I have worked across a wide range of technologies, designing and implementing high-performance solutions in both cloud and on-premise environments. My expertise lies in AWS, where I have developed, deployed, and optimized cloud-based applications. I am comfortable navigating between development and DevOps, ensuring seamless integration between software and infrastructure. In addition, I have solid experience with Go and Java, leveraging them for cloud-native applications and high-efficiency systems.