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Description: I need a backend developer to assist with analysing and troubleshooting an existing web service. The task includes reviewing API requests/responses, debugging issues, and updating a specific module with new validations or logic. Responsibilities: Review current service behaviour Identify cause of incorrect output Modify backend code (Java/Spring preferred) Fix validation or mapping issues Test the functionality using Postman/SoapUI Provide final working code + short documentation
Projektin tunnus (ID): 40319708
29 ehdotukset
Etäprojekti
Aktiivinen 12 päivää sitten
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29 freelancerit tarjoavat keskimäärin ₹20 902 INR tätä projektia

With over 9 years of experience and a proven specialization in Java and Spring Boot development, I can be your go-to expert to troubleshoot, analyze and update your websocket by ensuring validations and logics are correctly implemented. I am well-versed in reviewing API requests/responses and provide modifications that are efficient, fault-isolated, and clean -- everything needed for a smooth back-end service. My use of distributed system approaches have worked well in decoupling services,reducing retry rates while maintaining fault isolation. As a bonus, my skills also extend to testing functionalities using Postman/SoapUI as well as providing high-quality documentation. I respect the importance of security in APIs, having substantial experience securing them through various validation techniques. My thorough understanding of AWS and Docker allows for efficient deployments while maintaining consistent functionality across different systems. Having led teams on enterprise-grade platforms, most especially within the healthcare space, I understand the importance of clean architecture and long-term maintainability of services - two qualities that would significantly benefit your project. I look forward to bringing this extensive expertise to bear as your chosen backend developer to drive the success of your health diagnostic project
₹12 500 INR 5 päivässä
7,2
7,2

I have 21 years of experience, Principal Software engineer at Microsoft, extensive experince with Java and spring boot , developed scalable microservices based applications with MVC and distributed system design. I can understand and improve the problems in your code base, can test and fix the bugs and improve performance. I have extensive experince with SQL too. I have understood your requirements and can deliver it.
₹25 000 INR 7 päivässä
5,6
5,6

Hi, I’m a Java Spring Boot developer with strong experience in debugging and fixing backend services, including API issues, validation problems, and data mapping errors. ✅ Relevant Expertise ✅ Java (8–21) & Spring Boot ✅ REST API debugging (requests/responses analysis) ✅ Validation & data mapping fixes ✅ MySQL / PostgreSQL ✅ Postman / SoapUI testing ✅ Clean code refactoring ? Approach • Analyze current API behavior and responses • Identify root cause of incorrect output • Fix validation, mapping, or business logic issues • Test thoroughly using Postman/SoapUI • Ensure stable and correct functionality ✔ Deliverables ✔ Updated backend code with fixes ✔ Correct API behavior ✔ Tested endpoints ✔ Short documentation of changes I focus on quick debugging, clean fixes, and stable results. Ready to review your service and start immediately. Best regards, Abhay
₹25 000 INR 7 päivässä
3,7
3,7

I am an experienced backend developer with a strong background in Java and Spring, adept at analyzing and troubleshooting web services. My expertise in debugging API requests and responses, coupled with a meticulous approach to modifying code and implementing new validation logic, ensures that I can effectively improve your existing service. I am committed to delivering high-quality, documented solutions that meet your needs.
₹25 000 INR 7 päivässä
3,5
3,5

Hi, I am an experienced Backend Developer with a focus on building scalable eCommerce Microservices using Java, Spring Boot, HCL commerce, SAP Hybris Commerce Cloud. I am available to begin to work immediately and would welcome the opportunity to discuss my background further with you. Regards Sanjay
₹12 500 INR 10 päivässä
3,0
3,0

Your Java/Spring backend needs debugging for incorrect API outputs and validation issues. I'll review the service behavior, identify root causes in the request/response flow, then fix the mapping and validation logic. Testing with Postman to confirm everything works properly. Built similar diagnostic systems including a price aggregation engine that processes 800+ products with complex validation rules and API integrations. Also created an algorithmic trading bot handling real-time API data with strict error handling. You can see more at ffulb.com. Need access to your codebase and API endpoints to assess the current setup first, then I can start debugging right away. Should have this sorted within a few days once I take a look.
₹13 907 INR 7 päivässä
2,2
2,2

Hi, I can help you analyse and troubleshoot your existing web service effectively. I have strong experience in Java and backend development, particularly with Spring-based applications, and I’m comfortable working with APIs, debugging request/response flows, and identifying issues related to validation, mapping, and business logic. I follow a structured approach—reviewing the current service behaviour, isolating the root cause of incorrect outputs, and implementing precise fixes while ensuring no regression in existing functionality. I also use tools like Postman and SoapUI to thoroughly test APIs and validate responses. Once the updates are completed, I will provide clean, well-documented code along with a brief explanation of the changes made for clarity and future maintenance. I’m detail-oriented and focused on delivering accurate and reliable results within the given timeframe. Let’s connect and get this resolved efficiently.
₹30 000 INR 7 päivässä
1,5
1,5

Hello! I see you’re looking for a backend developer to analyze and troubleshoot your existing web service, particularly in the health diagnostics sector. I have extensive experience in Java and Spring, which aligns perfectly with your requirements. I specialize in reviewing API requests/responses and debugging issues, ensuring any validation or mapping problems are addressed efficiently. My approach emphasizes quality and communication, so you can expect regular updates on progress and any challenges encountered. Furthermore, I am thorough in testing functionalities with tools like Postman and SoapUI, ensuring everything works seamlessly before delivery. Along with the final working code, I'll provide clear documentation to help you understand the updates made. I am excited to discuss how we can enhance your service together! Thanks,
₹27 750 INR 1 päivässä
0,0
0,0

Thank you for sharing the details of your project. We at DemiVision, LLC understand the importance of robust, reliable health diagnostics platforms and are well-versed in backend development, particularly with Java and Spring. Your requirement for a thorough analysis and troubleshooting of your existing web service aligns perfectly with our expertise. Our team has extensive experience in reviewing and refining API interactions, diagnosing output discrepancies, and implementing precise validation and mapping logic for healthcare applications. We recognize the critical nature of accurate data handling in medical contexts and will ensure each update is rigorously tested using tools like Postman and SoapUI to guarantee correct functionality and compliance. Our proposed approach involves thoroughly reviewing your service’s current behavior and API flows to pinpoint the source of any incorrect output. We will then update your backend code, focusing on the relevant module, to incorporate the necessary validations or logic changes. Following comprehensive testing, we’ll deliver clean, working code with concise documentation to support your ongoing maintenance. We are committed to providing clear communication, technical excellence, and reliable solutions tailored to the healthcare sector. We look forward to collaborating with you to enhance your health diagnostics service and ensure seamless, accurate outcomes.
₹25 000 INR 10 päivässä
0,0
0,0

With over two decades of experience as a developer, I am confident in my abilities to tackle the tasks at hand for your project. My expertise lies in developing applications in Dotnet and Dotnet core, specifically with backend functionality utilizing SQL Server and front-end work using Angular JS and ASP.Net Web Forms. Additionally, I have significant experience working with APIs, which is particularly relevant for the task you've outlined. In terms of troubleshooting existing web services, this is an area where I shine. My years of practical knowledge have honed my ability to pinpoint issues with precision and develop efficient solutions. I am well-versed in appraising API requests and responses, debugging problems, and implementing new validations or logic where needed. Moreover, I understand the significance of thorough testing in ensuring the functionality of an app. Working with tools like Postman and SoapUI to confirm the seamless flow of data is essential to me. From my side, you can expect not only a fully-functioning backend but also a concise document outlining the changes made and their impact on overall system functionality. My commitment to providing quality results paired with my extensive background make me a strong fit for your project. Let's chat to discuss the requirements in detail.
₹25 000 INR 10 päivässä
0,0
0,0

Hi, I’d be happy to help you analyze and fix your existing web service. I have solid experience in Java and Spring Boot, working extensively on backend systems, API development, and debugging production issues. I’ve handled similar tasks involving incorrect API responses, validation bugs, and mapping problems. ? How I’ll approach your task: Review current API behavior and request/response flow Debug and identify root cause of incorrect output Fix validation, business logic, or mapping issues Update the specific module cleanly (maintainable code) Test thoroughly using Postman / SoapUI Deliver working code with clear explanation/documentation ? Why me: Strong Core Java + Spring Boot experience Experience with debugging real-world backend systems Clean, readable, production-quality code Quick turnaround and clear communication I can start immediately and ensure the issue is resolved efficiently. Looking forward to working with you! Best regards, Tuhin
₹22 000 INR 6 päivässä
0,0
0,0

Silahkan dibeli ya saya tunggu ya nanti kalo minat chat aja ya aku on terus menerus dan cepat untuk mendapatkan hasil.
₹25 000 INR 2 päivässä
0,0
0,0

Hi — it sounds like you already have a working service, but something in the logic or data flow is breaking the expected output. These issues are usually hidden in validation, mapping, or edge-case handling, so a careful trace is key. I can step in and systematically analyse what’s happening — not just patch the issue, but make sure the fix is stable and doesn’t create side effects elsewhere. Here’s how I’d approach it: * Trace API requests/responses to pinpoint where the output diverges * Debug the service layer and mapping logic (DTOs, converters, validations) * Fix validation rules or data transformation issues cleanly * Update the specific module with minimal disruption to existing flow * Test thoroughly using Postman/SoapUI with real and edge-case scenarios * Share clean, well-commented code + a short explanation of the fix I’ve worked on similar Spring-based services where incorrect outputs were caused by subtle mapping bugs or validation gaps — and fixed them without breaking existing integrations. If you can share the API details or a failing scenario, I can start quickly and get this resolved. Let’s connect ? Praveen Sharma
₹12 500 INR 5 päivässä
0,0
0,0

Hello, As an experienced engineer and tutor, I have a unique ability to bridge the gap between complex scientific principles and real-world application - skills that I believe make me an ideal backend developer for your project. My proficiency in Java is extensive and built on solid foundations, making it second nature for me to navigate and troubleshoot codes - habits which greatly contribute to my role as a backend developer. Your project presents an exciting challenge that aligns perfectly with my skill set. My previous experience reviewing and modifying backend codes combined with my meticulous approach to testing functionality ensure that the analysis and troubleshooting tasks will be handled with utmost efficiency. Additionally, my familiarity with Postman/SoapUI provides significant advantage when it comes to testing the final functionality. In conclusion, my in-depth understanding of foundational concepts and problem-solving frameworks will be invaluable as we delve into reviewing your current service behavior, identifying issues, modifying backend code if needed, and rectifying any validation or mapping error. I look forward to providing you with not just a final working code but also clear documentation that serves as a lasting reference for your developers. Let's chat further about how I can fully step up for your project needs. Thanks!
₹12 500 INR 2 päivässä
0,0
0,0

Hi, I saw your project, debugging a Java/Spring API that's returning incorrect outputs. I deal with this kind of problem regularly. I'd love to take a look. Do you have any logs or sample requests showing the wrong behavior? Aymane
₹18 000 INR 7 päivässä
0,0
0,0

I would like to express my interest in assisting with the analysis and troubleshooting of your existing web service. With solid experience in backend development and API diagnostics, I am confident in my ability to efficiently identify and resolve the underlying issues affecting your system. Execution : I will begin by thoroughly reviewing the current service behavior, analyzing API request and response flows to pinpoint inconsistencies or incorrect outputs. Once the root cause is identified, I will implement the necessary fixes—whether related to validation, data mapping, or business logic—ensuring the solution is robust and scalable. All updates will be carefully tested using tools like Postman or SoapUI to guarantee accuracy and reliability. Additionally, I will provide clean, well-structured code along with concise documentation outlining the changes made.
₹12 500 INR 7 päivässä
0,0
0,0

I am java developer who is currently working as a software specialist in an IT company. I am having 5.5 years of experience in java spring boot and related technologies. I can easily understand the requirements and debug if any issue present and also suggest optimization for improved api performance
₹22 000 INR 10 päivässä
0,0
0,0

Could you please provide more details about the project regarding the API and issues to provide better understanding?
₹25 000 INR 7 päivässä
0,0
0,0

I am a Java Backend Developer with 3.6+ years of experience in Java, Spring Boot, and Hibernate, specializing in API development, debugging, and microservices. I have hands-on experience analyzing API requests/responses, identifying root causes of issues, and fixing validation and mapping logic efficiently. I am highly skilled in troubleshooting production issues, testing APIs using Postman, and delivering clean, reliable fixes with proper documentation. My strong debugging mindset and ability to quickly understand existing systems make me a great fit for resolving complex backend issues.
₹35 000 INR 10 päivässä
0,0
0,0

I read your project description and I am ready to help you troubleshoot, debug, and enhance your existing web service. With strong expertise in the Java/Spring ecosystem and a keen eye for identifying mapping and validation flaws, I can efficiently track down the root cause of your incorrect outputs and implement the necessary fixes. Because the exact scope of the debugging depends heavily on the current state of the codebase, I propose we start with a brief initial assessment. Once I have access to the code and can evaluate the complexity of the validation/mapping issues, I will provide you with a precise, fixed timeline and cost for the complete fix.
₹17 000 INR 7 päivässä
0,0
0,0

Sandton, South Africa
Liittynyt maalisk. 23, 2026
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