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As a seasoned IT consultant and Solutions Architect, I offer comprehensive guidance to individuals and businesses seeking expertise in the following areas: Solution Architecture: I can provide guidance on designing robust and scalable software solutions tailored to your specific business requirements. Whether you're looking to migrate to the cloud, optimize your existing infrastructure, or build a new application from scratch, I can help you navigate the complexities of solution architecture and ensure the success of your project. Technical Leadership: Drawing from my experience as an Engineering Manager and Technical Lead, I offer guidance on effective team leadership, project management, and collaboration strategies. Whether you're leading a small development team or overseeing a large-scale IT project, I can provide insights and best practices to help you maximize productivity, foster innovation, and drive success. Technology Selection: With expertise in a variety of technologies including .NET, C#, React, Next.Js, Go, and various databases, I can assist you in selecting the right tools and technologies for your project. Whether you're evaluating different programming languages, frameworks, or databases, I can offer unbiased guidance to help you make informed decisions that align with your business goals and technical requirements. Problem-Solving: I excel in solving complex technical challenges and can provide guidance on troubleshooting issues, identifying root causes, and implementing effective solutions. Whether you're facing performance bottlenecks, security vulnerabilities, or integration challenges, I can help you overcome obstacles and achieve your objectives. Questions I Can Answer: What is the best approach for designing a scalable and secure software architecture? How can I effectively lead and motivate my development team to achieve project success? Which technology stack should I use for my project, and how can I ensure compatibility and scalability? What are the key factors to consider when migrating to the cloud, and how can I mitigate risks? How can I optimize the performance of my application and improve user experience? What are the best practices for implementing DevOps principles and automation in my development workflow? How can I ensure data integrity and security in my application architecture? What strategies can I employ to mitigate risks and ensure project delivery on time and within budget?
Currently, David is unavailable for new clients - please watch this space for updates. ========= David has been a software engineer since 1986. He is a full stack web developer with a wide range of experience. He is *very* good at figuring out solutions that stump engineers with less experience. David has been a Web Engineer at 10 Up, where he had the honor of working with a world class WordPress development team. With the release of WordPress 4.5 he is proud to add "WordPress core Contributor" to his list of accomplishments. David has been the chief software architect and CTO of 3B Alliance, an SaaS provider focusing on eCommerce and business to business solutions. In this role he implemented complex payment processing in a distributed environment. David has over 30 years of Software Engineering and IT experience. Involved in internet development since 1994, David has worked as the Director of IT and Software Engineering for an International Insurance Company and the Chief of South Eastern Operations for an International IT Consulting Firm. His professional writing has been published by Sitepoint, DICE, Microsoft, C/C++ User's Journal, PC Techniques and John Wiley & Sons. He has served as an expert witness in Federal court in a software copyright infringement case. He has worked as a consultant for Fortune 500 companies in the manufacturing and financial industries. As an Artificial Intelligence and Physics Simulation Programmer for a major game developer his credits include NFL Full Contact Football, Indy Racing, Jeff Gordon XS Racing and Centipede 3D. Specialties: WordPress, HTML 5, CSS, JavaScript, Web Development, Software Design, Technical Writing, PHP, mySQL, C++, Application Security, eCommerce, API Based Programming, Game Development.
Full Stack Developer for 9 Years Currently Teaching on Codementor Exclusively on Wednesdays and Fridays. Please DM to schedule Full Stack Javascript Developer React + Redux + Node.js. Strapi.io Winner of multiple Ethereum Hackathons (EthGlobal, Gitcoin, AAVE, theGraph, Matic, Polygon, Badger) DeFi Yield Farming Strategy Developer Former Lead Dev at Ethereum Crypto / DeFi Startup Experienced in developing with Solidity, theGraph, Hardhat, Vyper, Brownie. Tons of Wordpress and some Python. Java during CS. Understanding of Bitcoin and Blockchain Technology (course at UNIMIB + experience) Bachelor in CS.
I'm an experienced full-stack developer who has been working as a freelancer for over 10 years now. Right now I'm focused a lot on developing with Elixir, but most of my time I have spent working on projects with PHP. I love creating software that's usable, testable and maintainable. Front-end wise my current framework of choice is VueJS. My projects range from short term projects for smaller customers to bigger and longer projects with bigger companies. My working times are rather flexible, so I don't have a problem working something out that fits me and my clients. I look forward to working with you!
Software Engineer with 9.5+ years of experience in web development, backend development, and server architecture. Expertise in building and maintaining various web/backend solutions, from automobile websites to job portals to freelance platforms with live chat integration . Proficient in server architecture setup, deployment, and optimization. I will give a **full refund** if I am not able to help.
Passionate Android Developer with 7+ years on hand with the Android Framework, Google Developer Expert @ Android & Firebase, Google Associate Android Developer Certification, have made several apps and created delivery app Uh-lala! My mission is to **help you understand the ins and outs of android development** and let you progress in your Android development career. I have been in multiple startups and worked with different apps (fintech, delivery apps, uber apps, and social media apps) which brought to me a broad range of knowledge on these different areas. Currently I'm working as a **Senior Android Engineer** for a big eCommerce app located in LA called ThriveMarket I'm also focused on **backend development** with Firebase which will let you scale your application for large apps and Architecture with MVVM. I have a strong love for **Clean Architecture** and best practices while coding, love to read, and learn every day.
I turn builders into agentic engineers who ship faster, smarter, and with confidence—one-on-one. WHAT I TEACH • Agentic engineering fundamentals: design, orchestration, and evaluation of AI agents • AI-assisted development: coding workflows that 2–5x velocity without sacrificing quality • Generative AI: local and cloud image/video generation, diffusion models, and end-to-end pipelines • Complex automated workflows: retrieval, tools, function-calling, evaluators, and monitoring • Prompt engineering that scales: patterns, guards, and reproducibility • Efficiency playbook: from Cursor/Copilot prompts to claude code, opencode, amp, repoprompt, CI, telemetry, and test harnesses. WHY ME • 13+ years building production apps across startups and Uber-scale systems • 2 years hands-on in generative AI, local and cloud-hosted LLMs and image generation, prompt engineering, and automations • I focus exclusively on 1:1 teaching—no cohorts, no fluff, just outcomes HOW 1:1 WORKS • Personalized roadmap tailored to your product, stack, and constraints • Live build-and-architect sessions focused on your real projects • Fast async support for quick questions and advice between sessions • Project planning, code reviews, and architecture critiques • Developer experience upgrades: templates, dev tools, CI, prompts, and guardrails • Curated resources and practical exercises to lock in skills OUTCOMES YOU’LL GET • Ship agentic features in days, not months • Choose the right approaches for your use case and budget • Stand up local and cloud image/video generation with reproducible results • Automate complex multi-step workflows with evaluation and monitoring • Write prompts and system designs that survive real users WHO THIS IS FOR • Engineers and founders who want hands-on guidance, not theory • Teams ready to integrate AI into production with confidence READY TO LEVEL UP?
Working as Staff Software Engineer at VISA INC. Skilled in Java, Microservices, Data Structures, Spring Boot, Rest Apis, MVC, CICD, Bamboo, Jenkins, OOPS, Angular, TypeScript, Javascript. Having strong engineering professional with a Bachelor of Technology (B.Tech.) from Vellore Institute of Technology, Vellore.
Full-Stack Web Developer, started coding from 15. A goal-oriented web developer with strong commitment to collaboration and solutions-oriented problem-solving. A self-motivated Web Developer with a high level of experience working on multiple projects. Passionate and hardworking with penchant for meeting deadlines. Interested in roles with companies promoting best practices and offering diverse customer projects. Enjoy process of development, learning new things. Habit of clean,elegant,sophisticated design style to make code maintainable, reusable. Technology Stack: - React.js/Vue.js/Angular.js - MySQL/PostgreSQL/MongoDB/Redis - Node.js/Python/Php - Express/GraphQL/Firebase - Docker/Nginx - Socket.io/REST/WebRTC - Google/Facebook/Twitter/Stripe APIs - Server-Side Configuration(Ubuntu,HTTP->HTTPS) - AWS Services
I love learning new things and taking on new challenges. For me, software development is an expression of those goals. My main experience is in native mobile app development with Swift for the iOS platform and java/kotlin for Android. I am familiar with many apple frameworks including, UIKit, Spritekit, CoreData, AVKit and AVFoundation as well as third-party frameworks like, AWS, Firebase, Admob and Facebook. I also frequently work with Android. I'm currently working on a smart home app that features integrations with AWS and bluetooth libraries. I care deeply about UI/UX and providing the best possible quality to users. I would be happy to help with any questions or projects.
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The length of a project depends on many factors, including the scope of your project and the technical complexity of it. When you post a freelance Payment systems project request on Codementor, you’ll have the option to indicate when you’d expect the project to be completed. We suggest chatting with the interested developers to ensure both sides are on the same page. For more information on how to post a freelance Payment systems request on Codementor, check out our article.
We don’t charge anything when you post a freelance hiring request for Payment systems developers! You’ll have the chance to determine what the budget for your project is when you post the request. You’ll only need to pay the developer if you’re 100% satisfied with their work. Please know that Codementor charges a small service fee when a developer completes the job.
We do a comprehensive technical and communications screen of all Payment systems developers at Codementor. Our network includes book authors, popular open source contributors, top Stack Overflow users and engineers at top tech companies. In addition, to continually ensure the quality of our freelancers, we regularly check in on existing Payment systems developers’ user satisfaction rates.
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