Senior Software Engineer (.NET / Java)

@augurstech

A Warm Hello! We are readily available to start working on this project! We would love the opportunity to support your team as a long-term software development partner. Our agency specializes in building scalable enterprise applications, cloud-native backend systems, and high-performance APIs using both .NET (C#) and Java technologies. With years of experience delivering enterprise-grade software solutions across finance, healthcare, SaaS, logistics, and business automation, we understand the importance of writing clean, maintainable code while collaborating effectively with distributed teams. We can assist with: - Backend application development - REST API design and integration - Database architecture and optimization - Cloud deployment and infrastructure - Performance tuning and scalability improvements - Production issue investigation and resolution - Automated testing and code reviews - System architecture and technical planning We would be happy to share resumes of our senior developers, relevant project experience, and discuss how we can best support your long-term development goals. We look forward to speaking with you. Best regards, Ana

@diektech

Hi — Elias here from Miami. I see you’re looking for a Senior Software Engineer with strong skills in .NET and Java. It’s clear you’re aiming to enhance your team's capabilities with robust, scalable solutions. The real technical challenge often lies in ensuring seamless integration across various systems while maintaining high performance and reliability. What usually matters most here is establishing a solid architecture that can adapt to future needs. A common issue in projects like this is managing complexity as you scale, especially around API development and cloud deployment. My approach would involve first assessing your current architecture to identify potential bottlenecks. I would then design a modular system, focusing on maintainability and future-proofing. I have extensive experience in both .NET and Java ecosystems, having worked on similar projects that required efficient backend solutions and seamless cloud integration, ensuring systems remain stable under load. A few questions to better understand the scope: Q1 – What are your current challenges with the existing system or architecture? Q2 – Are there specific user roles or permissions that need to be managed? Q3 – What integrations do you foresee as critical for this project? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.

@ehsankayani

Hi, I'm a Senior .NET Developer with 15+ years of experience building scalable web applications, REST APIs, and backend systems using C#, ASP.NET Core, MVC, Entity Framework, SQL Server, and Azure. I've worked on large enterprise applications, POS integrations, e-commerce platforms, and high-traffic systems. I write clean, maintainable code and have extensive experience working with remote teams and international clients. I'd be happy to discuss how my experience aligns with your requirements. Thank you for your consideration. Best regards, Ehsan Ullah Kayani

@AhteshamAK

Backend systems fail when scalability, API design, and maintainability are treated as afterthoughts. Your requirement needs an engineer who can build reliable services, work with databases, and contribute to architecture decisions — not just complete isolated tasks. I have experience building enterprise applications using C#, ASP.NET, ASP.NET Core, MVC, REST APIs, SQL databases, and cloud-based solutions. My approach focuses on clean architecture, scalable backend services, secure APIs, and production-ready code with proper testing and documentation. At Pixcile Technologies, I have worked on business applications, SaaS solutions, and custom software platforms involving backend development, integrations, and cross-functional delivery. I would like to understand your current stack — are you mainly working with ASP.NET Core APIs, and is your architecture currently monolithic or moving toward microservices? Best Ahtesham

@a4logic

Hello, With over 5 years of professional software development experience, predominantly with Java and .NET (C#), I match the requirements for your Senior Software Engineer role perfectly. Throughout my career, I have consistently built and maintained backend applications, APIs, and databases using these powerful languages. Additionally, my familiarity with cloud platforms like AWS, Azure, or GCP coupled with a deep understanding of software design principles enhances my suitability for this position. One of the key strengths I bring to the table is my relentless focus on delivering high-quality code and maintaining excellent problem-solving skills needed for troubleshooting and resolving production issues effectively. My portfolio is rich with projects that required native English speaking capability for client meetings, technical discussions, and cross-functional collaboration. As a native American English speaker myself, rest assured that our communication lines will always be top-notch. Yasir Abdullah is all about turning dreams into reality through well-executed projects. We can deliver on your requirements for a senior software engineer proficient in .NET/Java and more. As a remote freelance opportunity requiring long-term commitment from both parties, working together would be mutually beneficial - helping your company scale new heights while broadening my own horizons in one of the largest web service provider companies in Thanks!

@rohitpatidar001

Hello, I am a Senior Java Backend Engineer with over 11 years of experience designing and developing enterprise applications using Java, Spring Boot, REST APIs, Microservices, PostgreSQL/MySQL, and cloud-based solutions. I have worked on scalable backend systems, API integrations, authentication, database design, performance optimization, and production support. I follow clean architecture, write maintainable code, perform code reviews, and collaborate effectively with distributed teams. I have experience working with Git, CI/CD, Docker, cloud platforms, and Agile development practices. I enjoy solving complex technical problems and contributing to architecture and design discussions. While my primary expertise is Java rather than .NET, I am confident in delivering high-quality backend solutions and adapting quickly to project requirements. I am available for long-term collaboration and would be happy to discuss how my experience can contribute to your team. Thank you for your consideration. Best regards, Rohit

@MashoodurRehman1

I am a Senior Software Engineer with over 7 years of experience in software development, specializing in .NET and Java technologies. My extensive background in building and maintaining backend applications, APIs, and databases aligns well with the requirements of your project. I am proficient in using cloud platforms such as AWS and Azure, which complements my strong foundation in software design principles and best practices. In my previous roles, I have successfully led projects that required collaboration with cross-functional teams, delivering scalable, high-quality code. I possess excellent problem-solving skills and have actively contributed to system architecture and technical decisions. My abilities to write well-tested code and participate in code reviews ensure that I can maintain the quality standards your team expects. I am keen to explore how my skills can benefit your team further. Please let me know if there is any additional information you require. I look forward to the possibility of discussing this opportunity in more detail. Thank you for considering my application.

@seefattechnologi

SURE------------------Let me share my resume------------------I am highly proficient in working on this project as per y matching skills . I am Passionate .NET /Full stack developer with rich experience with all the latest technologies with so many successful Tasks. Please ping me to get started and provide you great results. Thanks!!!

@techplusintl

Hi, To develop and maintain backend applications and services, I will leverage my 5+ years of experience in .NET (C#) and Java. I will ensure the implementation of clean, scalable, and well-tested code while collaborating with product and engineering teams to deliver new features. I have a strong understanding of software design principles and best practices, and I am comfortable participating in client meetings and technical discussions in English. Happy to discuss the details.

@efanntyo

Hi there, I am excited to apply for the Senior Software Engineer position. With over 5 years of professional experience in software development, I have honed my skills in both .NET and Java, specializing in building robust backend applications and APIs. My familiarity with cloud platforms, particularly Azure, aligns well with your project requirements, ensuring efficient deployment and scalability of applications. My experience encompasses a strong understanding of software architecture and design principles, enabling me to deliver high-quality, maintainable code. I am adept at working independently, yet I thrive in collaborative environments, participating actively in client meetings and technical discussions. My communication skills, both verbal and written, are exceptional, allowing me to engage effectively with cross-functional teams and stakeholders. I am committed to developing clean, scalable, and well-tested code, and I am eager to contribute to your system architecture and technical decisions. I look forward to bringing my problem-solving skills to troubleshoot and resolve production issues efficiently. Thank you for considering my application. I am enthusiastic about the opportunity to contribute to your team and help deliver innovative solutions. I have attached my resume for your review and look forward to the possibility of discussing this exciting opportunity with you. Best Regards,

@corpmember29

Hello, WE HAVE DEVELOPED ENTERPRISE BACKEND SYSTEMS, CLOUD-NATIVE APIs, AND LARGE-SCALE .NET/JAVA APPLICATIONS FOR LONG-TERM PRODUCT TEAMS AND CAN PROVIDE RELEVANT EXAMPLES. ***40 -45 hours weekly I am available for work*** *** you will track all progress of the project thru the tracker*** I reviewed your requirement carefully and understand that you are looking for a senior engineer who can contribute across architecture, implementation, production support, and client-facing technical collaboration. I have 10+ years of experience in backend and full-stack engineering, including .NET (C# / ASP.NET Core), Java (Spring Boot), REST APIs, microservices, PostgreSQL/MySQL, Azure, AWS, Docker, CI/CD, automated testing, and performance optimization. I have worked on long-term remote product teams, participated in code reviews, architecture discussions, client meetings, and cross-functional delivery planning, and am comfortable taking ownership of features from design through production. My experience includes: - ASP.NET Core / Web API development - Spring Boot and Java backend services - Cloud deployments on Azure and AWS - Database design and query optimization - CI/CD pipelines and DevOps workflows - Production troubleshooting and performance tuning - Distributed systems and service-oriented architecture I eagerly await your positive response. Thanks, Christina

@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 Java, .NET, Cloud Computing, Software Architecture, Azure, Software Development, ASP.NET, Backend Development, API Development, Software Engineering 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.     

@starttechno

Your post reads like you need someone who can own backend services end to end in .NET (C#) or Java, not just ship features but resolve production issues and weigh in on system architecture. That's the work I do daily. On the .NET side I've built ASP.NET Core Web APIs backed by SQL Server and Postgres, keeping controllers thin with logic in services and EF Core for data, plus xUnit tests so regressions surface before deploy. On Java I've worked with Spring Boot REST services and JPA. For cloud I lean on Azure (App Service, Azure SQL, Blob) and AWS, containerized with Docker so environments stay identical from local to prod. Joining a team like yours, I'd start by reading the existing codebase, mapping the domain and current pain points, then contribute in small reviewed PRs rather than big risky drops. I take code reviews and clear written communication seriously, and I'm comfortable driving technical discussions and client meetings in English. One thing that shapes how I'd prioritize early: is the current backend a monolith you want to keep hardening, or are you moving toward splitting services out? That decides where the first architecture effort should go. Muhammad Saad

@MSHOAIBK

Hello, I’m a Senior Full-Stack .NET Developer with 6+ years of experience building enterprise applications using C#, .NET Core/.NET 8, ASP.NET Core, Web APIs, SQL Server, Azure, and cloud-based architectures. I have developed scalable backend systems, REST APIs, microservices, and business-critical applications with a strong focus on clean architecture, performance, and maintainability. My expertise includes: Backend development with C#/.NET and SQL Server REST API and third-party integrations Azure cloud services, CI/CD, Git, and Azure DevOps Database design, optimization, and performance tuning Code reviews, debugging, testing, and production support Agile development and cross-functional collaboration I enjoy solving complex technical challenges and contributing to architecture decisions while delivering reliable, well-tested code. I am available for long-term collaboration and can dedicate 40+ hours per week. Hourly Rate: $25/hour Availability: Immediate Note: While I have strong written and spoken English and regularly collaborate with international clients, I want to be transparent that I am not a native American English speaker. If this requirement is flexible, I would be happy to discuss how my technical expertise can contribute to your team. I look forward to discussing your project. Regards, Muhammad Shoaib

@ruslanv4

Hello, With over 5 years of professional software development expertise, I'm well-aligned with your requirements for a Senior Software Engineer specializing in both .NET/C# and Java. I thrive at building and maintaining backend applications, APIs, and databases. Steeped in the best practices of software design principles, I take pride in my ability to work independently and deliver high-quality code even when faced with complex challenges. My clients love my problem-solving acumen as it translates into practical solutions that improve their overall products. Apart from the technical skills you’re seeking, I’m also proficient with cloud platforms such as AWS, Azure, and GCP - beneficial assets to ensure smooth scaling within your infrastructure. Furthermore, being a native American English speaker, I possess exceptional verbal and written communication skills which enable me to actively participate in client meetings and contribute effectively during technical discussions or cross-functional collaborations. Given my extensive experience, high-fidelity code churns out from my keyboard effortlessly. Rest assured, selecting me means you have someone who can hit the ground running on day one. Let's leverage my deep understanding of system architecture to shape intelligent solutions that collectively meet your vision! Thanks!

@badarmadni927

Hi — Badar Madni here. The project involves building and maintaining backend applications, APIs, and databases, which requires a strong understanding of software design principles and best practices. This includes developing scalable and well-tested code, as well as troubleshooting production issues. The real technical challenge here lies in ensuring the system's scalability and performance, particularly when integrating with cloud platforms such as AWS, Azure, or GCP. What usually matters most is how the system will handle high traffic while maintaining data consistency. My approach would focus on leveraging .NET or Java to build robust backend applications, emphasizing clean and scalable code. I've worked on similar platforms where cloud platform integration was critical, and I'm familiar with the importance of delivering high-quality code. A few questions to better understand the scope: Q1 – What features are expected in the initial release? Q2 – How will user roles and permissions be handled? Q3 – Are there any specific database requirements or constraints? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you. Badar Madni

@akshaybhagwat76

With over 8 years of professional experience in software development, I am confident that I possess the skills and knowledge necessary to excel in this Senior Software Engineer role. I have a solid foundation in .NET (C#) and Java, backed by a track record of success with clients appreciating my excellent problem-solving skills and ability to deliver high-quality code. What sets me apart is not just my technical know-how but also my deep commitment to client satisfaction and maintaining effective communication channels. My 94% completion rate, on-budget deliveries, and client recommendations attest to my reliability and ability to meet deadlines while ensuring project quality. As a native English speaker, I would ensure seamless English-language collaboration and am comfortable participating in meetings and discussions at all levels. Your project’s requirements align well with my skill set as I can proficiently develop complex web applications, API frameworks, along with strong familiarity with cloud platforms like AWS and Azure - something your team is looking for. If selected for this position, I would leverage my expertise to drive innovation within your backend systems while collaborating effectively with other teams. Let's build great things together!

@mubeenm5026

As a seasoned Senior Software Engineer with more than five years of professional experience, I have demonstrated my proficiency in back-end development, API creation, and database management using both .NET and Java. My expertise expands to include knowledge of cloud platforms like AWS, Azure, and GCP that will be essential for delivering your project remotely. With a strong understanding of software design principles and impeccable problem-solving skills, I am confident in my ability to deliver exceptionally clean, scalable and well-tested code, fulfilling all your requirements. At Web Crest, we are committed to delivering secure, high-performance, and future-ready solutions tailored to our clients' needs - an approach that aligns perfectly with the long-term nature of this opportunity. Additionally, our strength in AI-powered solutions and automation systems makes us particularly poised to understand and handle complex technical aspects. For your team collaboration needs, my native American English fluency paired with exceptional verbal and written communication abilities ensure effective participation in client meetings and cross-functional discussions. Combined with transparent communication, fast response time, and long-term technical support you can count on even after project completion from Web Crest - Let's create something exceptional together!

@Muhammadzeesha59

Hello Sir/MAM I am a skilled full stack developer. Having rich experience in Java , C++ , C , C# , Python , Eclipse , Sql , Mysql , .Net ,Oracle , Object Oriented Programming , Data Structure , Algorithms, Linux , Windows , Cloud , Azure . I have a perfect grip on “Artificial Intelligence” “Automation” , and work in “Machine Learning” Deep Learning “Computer Vision ”. My track record as demonstrated in my 100% job completion and 5-star review rating showcases My ability to deliver exceptional results on time and with utmost quality I believe that my skill set makes me the ideal candidate for this project Please come on chat we will discuss more about this I will be waiting for your reply . Thanks and Best Regards