Fullstack Engineer Needed - Latin America

@AwaisChaudhry

Hi there, I’m Muhammad Awais, and I’m excited to help you shape and own the tech health of your mission-critical web apps. I’ll start with a practical assessment of your .NET backends and React frontends, map out the architecture for scalable and secure REST APIs, and establish clear documentation and coding standards to keep debt under control. My approach focuses on robust, high-performance blocks with clear interfaces, strong SQL Server tuning, and reliable CI/CD pipelines in Azure. I’ll guide the team through code reviews and mentoring to lift overall output while ensuring deliverables stay aligned with stakeholder needs. The plan includes gradual refactoring where needed, automated tests, and a nearshore/offshore friendly collaboration rhythm to keep momentum and transparency ongoing. What is your current CI/CD setup (tools, pipelines, and deployment frequency) and how do you envision the target state for improved automation and reliability? What are the top three architectural concerns you want addressed in the next sprint (security, latency, debt reduction)? Do you expect any specific Azure services or on-prem integration to be included in the roadmap, and what are the data migration constraints, if any? Best regards, Muhammad Awais

@Microlent

Hello! Your need for a Senior Fullstack Engineer to maintain and evolve mission-critical .NET and React applications aligns closely with my experience working across modern full-stack environments and scalable web architectures. Approach Full-Stack Architecture I work comfortably with .NET Core / .NET 5+ backends and React frontends, focusing on clean architecture, performance, and long-term maintainability. I prioritize modular services, clear API contracts, and structured frontend state management. Backend & API Design • Build and maintain secure RESTful APIs using .NET Web API • Improve system reliability and performance • Reduce technical debt through refactoring and documentation Frontend Development Using React + TypeScript, I build responsive, accessible interfaces with strong state management and scalable component structures. Database & Performance I have experience managing SQL Server environments, optimizing complex queries and stored procedures, and ensuring database performance under production workloads. DevOps & Delivery • Git-based workflows and CI/CD pipelines • Cloud deployment (Azure or similar environments) • Continuous performance monitoring and improvement I’m comfortable working in distributed teams, startup environments, and client-facing roles, and I value clear communication and proactive collaboration. Best regards, Jasmin

@AhteshamAK

Hello, I'm Ahtesham. Your need for a Senior Fullstack Engineer who can confidently own architectural evolution and elevate a team aligns strongly with my experience. I’ve led complex .NET Core and React ecosystems, modernized legacy components, and introduced clarity through documentation and structured delivery workflows. I’m highly versed in RESTful API design, SQL optimization, Azure DevOps pipelines, and frontend craftsmanship using React and TypeScript. I can step into diverse codebases and bring both stability and innovation, ensuring high performance across backend services and fluid, accessible user interfaces. I focus on reliability, technical debt reduction, and mentoring teams to raise overall engineering standards. Looking forward to partnering with you. Regards, Ahtesham

@tangramua

Dear ,   We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time.   We are 25 years in this business and our technical specialists have strong experience in Cloud Computing, C# Programming, React.js, Full Stack Development, Web API, RESTful API, .NET Core, DevOps, API Development, CI/CD and other technologies relevant to your project.   Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews.   Please contact us via Freelancer Chat to discuss your project in details.    Best regards, Sales department Tangram Canada Inc.     

@akshaybhagwat76

***.NET EXPERT*** Hi, As you're looking for a Senior Fullstack Engineer to own mission-critical .NET backends and React frontends with SQL Server mastery, I'm pleased to offer my services for the same. I have extensive experience leading complex enterprise-level web applications using C#/.NET Core 5+, React.js with TypeScript, Web API development, SQL Server schema design/stored procedures/performance tuning, modern state management, Azure CI/CD pipelines, Git workflows, deep code reviews, technical mentorship, and advanced English communication for US-based client collaboration perfect for driving your technical excellence, system reliability, and team elevation in nearshore/offshore startup environments. Kindly let me know your suitable time for further discussion about this role. In the meantime, please review my client feedback and portfolio below. Looking forward to driving technical excellence together... Thanks, Akshay

@sunainawbst

Hi, I reviewed your role description and understand that you are looking for a Senior Fullstack Engineer who can take ownership of mission-critical web applications, ensuring strong .NET backend architecture and modern React frontend development while maintaining system reliability and improving technical quality across the team. I have solid experience working on full-stack web platforms, focusing on scalable architecture, performance optimization, and maintaining high code quality across both backend and frontend systems. Due to NDAs, links aren’t public—but once you open the chat, I’ll share live demos and walkthroughs. I deliver high quality work on time. Let us connect over chat to discuss and start the work as per your requirements. Regards Ranjana

@OutsourceMan

⭐⭐⭐⭐⭐ Leverage CnELIndia’s extensive fullstack expertise to architect and deliver high-performance .NET Core/5+ backends and dynamic React frontends, ensuring scalability, security, and reliability. Utilize Raman Ladhani’s hands-on experience in complex SQL Server environments for optimized schema design, query tuning, and data-driven backend solutions. Implement robust RESTful APIs and cloud-native integrations (Azure) to automate workflows and streamline enterprise operations efficiently. Apply CI/CD best practices and DevOps automation to maintain continuous delivery and minimize technical debt across the project lifecycle. Provide proactive technical mentorship and code reviews to elevate team performance, foster knowledge sharing, and maintain engineering excellence. Ensure clear documentation and effective communication with stakeholders to align development outcomes with business goals and project timelines. Focus on building responsive, accessible, and modern user interfaces with React, TypeScript, and state management frameworks for superior user experiences. Monitor system reliability continuously and implement best practices for performance optimization, proactive issue resolution, and technical innovation.

@juanjosec63

Hello, I’m excited about the opportunity to contribute as a Senior Fullstack Engineer and help strengthen the architecture and reliability of your web applications. With extensive experience in C#, .NET Core, and React development, I can design scalable backend services, build responsive frontends, and ensure smooth API integrations that support high-performance enterprise workflows. I’m also comfortable managing SQL Server environments, optimizing queries, and maintaining strong CI/CD practices within cloud-based infrastructures such as Azure. You can expect proactive technical leadership, clear documentation, and high-quality code that improves system stability while supporting the growth and effectiveness of your engineering team. Best regards, Juan.

@Julian29

Hello, **** You can track the project’s progress using the tracker. I’m available to work 40 hours per week **** I have 10+ years of experience in fullstack development, with deep expertise in C#, .NET Core/5+, React, TypeScript, and SQL Server. I specialize in designing scalable architectures, optimizing database performance, and building responsive, maintainable frontends. I have led API integrations, CI/CD pipelines, and cloud deployments (Azure), ensuring high reliability and technical excellence. I WILL PROVIDE 2 YEAR FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE, WE WILL WORK WITH AGILE METHODOLOGY AND WILL GIVE YOU ASSISTANCE FROM ZERO TO PUBLISHING ON STORIES. I am experienced in mentoring teams, performing thorough code reviews, and delivering documentation that enables smooth collaboration. I can quickly adapt to client-facing, nearshore/offshore startup environments and drive project success end-to-end. I eagerly await your positive response. Thanks.

@devbaloni1983

Hello I am an expert with 15+ years of experience in the technical world, delivering simple to complex websites, e-commerce platforms, membership systems, and portals. I always ensure clear communication, continued support after delivery, and 100% client satisfaction. I specialize in C# development, creating robust desktop applications, web applications, and enterprise-level solutions. With expertise in .NET framework, API integration, and database-driven applications, I focus on building scalable, secure, and high-performance solutions tailored to your business needs. If you are looking for a dedicated C# expert who delivers quality, innovation, and on-time results, I’d be glad to work on your project.

@Sohail748

Hi there, I'm offering a 25% discount on this project. With over 8 years of experience in full‑stack development, I will build complete, scalable solutions for your needs—handling everything from frontend interfaces to backend infrastructure with clean, maintainable code. I'll start by understanding your specific requirements and technical goals. I will then develop comprehensive, production‑ready applications with modern frontend frameworks (React, Vue, or Angular), robust backend services (Node.js, Python, or your preferred stack), efficient database design, secure authentication and authorization, third‑party integrations as needed, and thorough testing across all components. You'll receive fully functional, production‑ready applications with clean, documented code and clear documentation for deployment and ongoing management. Let's build something great together. Best regards, Sohail

@emilesd617

Hi, I am a full-stack .NET developer with 8 years of rich experience. I am familiar with C#, .NET Core, React.js, TypeScript, and SQL Server. For this project, the most important point is building a stable backend architecture with .NET and well-structured REST APIs that work smoothly with the React frontend. This helps keep the system reliable, scalable, and easy to maintain while improving overall performance. I'm an individual freelancer and can work on any time zone you want. Please contact me with the best time for you to have a quick chat. Looking forward to discussing more details. Thanks. Emile.

@dataspro

Nice to meet you , It is a pleasure to communicate with you. My name is Anthony Muñoz, I am the lead engineer for DSPro IT agency and I would like to offer you my professional services. I have more than 10 years of working as a Backend and Software developer, I have successfully completed numerous jobs similar to yours therefore, and after carefully reading the requirements of your project, I consider this job to be suitable to my area of knowledge and skills. I would love to work together to make this project a reality. I greatly appreciate the time provided and I remain pending for any questions or comments. Feel free to contact me. Greetings

@mayankinnovative

Hi, As per my understanding: You are looking for a senior fullstack engineer who can take ownership of mission-critical web applications built with .NET and React. The role involves designing scalable backend architectures, building modern React interfaces, managing SQL Server performance, and ensuring system reliability. Additionally, the engineer should handle REST API integrations, maintain technical documentation, reduce technical debt, and contribute to team productivity through code reviews and mentorship while collaborating with stakeholders in a startup environment. Implementation approach: I would approach this by strengthening both the backend and frontend architecture. On the backend, I would design scalable .NET Core services, optimize REST APIs, and ensure secure, high-performance integrations. For the frontend, I would develop responsive React applications using TypeScript and modern state management for maintainability. SQL Server databases would be optimized through proper schema design, indexing, and query tuning. I would also implement CI/CD pipelines, maintain documentation, perform thorough code reviews, and ensure the codebase remains scalable, maintainable, and production ready. A few quick questions: Are the existing applications built as a monolith or microservices architecture? What is your current cloud environment and CI/CD setup (Azure DevOps, GitHub Actions, etc.)? What are the most critical systems or modules that need immediate improvement?

@Appworldz

Dear Hiring Manager, As a senior fullstack team, we specialize in mission‑critical .NET/React platforms with end‑to‑end ownership of architecture, code quality, and documentation. We bring 8+ years’ experience in C#, .NET Core/.NET 5+, React, TypeScript, Web API, and modern state management, building secure, scalable systems in Azure with automated CI/CD and Git workflows. Our engineers are fluent in SQL Server (schema design, complex stored procedures, performance tuning) and RESTful API design to streamline enterprise workflows. We work daily with US clients in nearshore/offshore, startup‑style environments, are comfortable navigating legacy and greenfield codebases, and mentoring mid/junior developers via structured reviews and pairing. We can: Stabilize and evolve your existing .NET backends and React frontends with a clear architecture roadmap. Reduce technical debt through refactoring, observability, and best‑practice DevOps. Provide proactive documentation, clear communication, and overlapping working hours with LATAM/US. Happy to start with a short technical session to align on the current stack, priorities, and success metrics. Regards Sahanaj

@mahads31

What challenges are you currently facing with your web applications? It sounds like you need someone who can take ownership of both backend and frontend tasks seamlessly. I have over 5 years of experience in fullstack development, specializing in .NET Core and React.js. This enables me to create robust architectures that ensure high performance and security. I also excel in designing RESTful APIs and optimizing SQL Server databases for optimal performance. With my background in CI/CD and cloud environments, along with a focus on mentoring junior engineers, I can contribute significantly to your team’s success. I’m excited about the opportunity to enhance both system reliability and team collaboration. Let me know if you’d like to discuss this further!

@mugencodes

Hello, I am Jayabrata Bhaduri, a seasoned Project Manager with a proficient team specializing in React.js, Full Stack Development, and API Development. I have thoroughly reviewed your project requirements for a Senior Fullstack Engineer and am confident in our ability to deliver exceptional results. Our team will take ownership of the technical health and architectural evolution of your mission-critical web applications, ensuring high performance, security, and scalability. We will lead the development of robust architectures using .NET and React, design seamless RESTful integrations, build exceptional user interfaces, manage SQL Server environments, and elevate team output through mentorship and clear communication. I would love to discuss this project further with you. Please feel free to schedule a call at your convenience. Regards, Jayabrata Bhaduri

@Shaiwan

❗❕‼️⁉️ Hello ⁉️‼️❕❗ I understand you need a Senior Fullstack Engineer to maintain and evolve .NET backends and React frontends with strong API, SQL Server, and cloud expertise. I HAVE SOME QUESTIONS REGARDING THE PROJECT SEND ME A MESSAGE FOR MORE DISCUSSION. ⇆ ⇆ ⇆ ➷➷➷ ★ Lead fullstack development using .NET Core/5+ and React.js for high-performance applications. ★ Design and maintain RESTful APIs and backend workflows for seamless enterprise integration. ★ Optimize SQL Server databases, queries, and schema design for scalability and performance. ★ Implement responsive, accessible frontends with modern state management and TypeScript. ★ Support CI/CD, DevOps, and cloud-native best practices for stable deployment. ★ Mentor engineers, perform code reviews, and ensure technical excellence across teams. ➷➷➷ ⇆ ⇆ ⇆ With 7+ years of experience in fullstack development, cloud deployment, and database optimization, I deliver robust, scalable solutions and guide teams to high-quality results. First, I will audit current architectures and workflows. Then implement backend and frontend optimizations for performance and scalability. Finally establish CI/CD pipelines, documentation, and team mentoring for long-term success. Let’s connect to discuss your fullstack priorities. Best Regards, Shaiwan Sheikh

@rbtech1984

Hi There!!! ★★★★ ( Senior Fullstack Engineer – .NET & React ) ★★★★ I carefully read your requirement for a senior fullstack engineer who can maintain and evolve mission-critical applications using .NET and React. You need someone who can handle backend architecture, build responsive interfaces, manage SQL Server performance and also support the team through mentorship and clean technical documentation. ⚜ .NET Core / C# backend architecture ⚜ React.js and TypeScript frontend development ⚜ RESTful API and Web API integrations ⚜ SQL Server schema design & query optimization ⚜ CI/CD pipelines and cloud deployment (Azure) ⚜ Performance tuning and technical debt management ⚜ Code reviews and engineering team support I bring 9+ years of fullstack development experience working with scalable web platforms, APIs and modern frontend frameworks. I have supported startups and offshore teams, helping improve stability, performance and dev workflow. My approach is to review the current codebase, stabilise backend services with .NET Core, optimise SQL queries, and enhance React UI performance while maintaining clear CI/CD pipelines. Would love to discuss how I can support your engineering team and product reliability. Warm Regards, Farhin B.