Fix Backend Crashes & Frontend Errors in NestJS + React (AWS ECS)

@extreamcode

Hi, With all due respect, I believe my extensive experience in solving complex backend and frontend issues like the ones you're experiencing would make me an excellent fit for your project. I am proficient in technologies like NestJS, React, AWS ECS, SendGrid, and have demonstrated a keen eye for null/undefined data handling issues similar to the ones you've mentioned. To tackle your backend crashes effectively, I will methodically trace down all unsafe property accesses and refactor your notification/email logic to ensure the stability of your tasks and server as a whole. In addition, I understand the need for consistent APIs between backend and frontend, and I am experienced with TypeORM- precisely what you need to ensure uniformity in data types. To ensure successful deployment on AWS ECS without container health failure or rollback, I will deploy better logging systems and a fault-tolerant error handling mechanism leveraging my strong cloud computing background. Moreover, since you mentioned MySQL optimization as an optional task, let me assure you that it's second nature to me; improving performance is always a top priority. My passion for solving complex coding problems combined with my experience with similar technologies piques my interest in working with you on this important project. I am ready to bring my sharp skills, never-give-up attitude, and technical knowledge to stabilize your stack while promising full sup Thanks!

@SBITServices

Hi, I have 5+ years of experience in Flutter. I will design and develop a fully functional Flutter mobile application for your business. The app will be cross-platform, responsive, and optimized for both Android and iOS. I will ensure smooth navigation, clean UI, and reliable performance. My Skills Include: a) Flutter Development – Expertise in building cross-platform mobile apps with responsive UI. b) State Management – Experienced in Provider, Riverpod, and Bloc for scalable apps. c) Backend Integration – Skilled in connecting apps with REST APIs, Firebase, and third-party services. d) Database Handling – Proficient in Firebase Firestore, MySQL, and SQLite. e) Deployment & Support – Experienced with publishing apps on Google Play Store and Apple App Store. Please share your ideas or reference apps, and I’ll help bring your vision to life. Lets connect in chat so that We discuss further. With Regards, Sai

@nikhilgarg96

Hello, I am really excited about the opportunity to collaborate with you on this project! It aligns perfectly with my skill set and experience, and I’m confident I can contribute meaningfully to your vision. I genuinely enjoy working on projects like this, and I believe we can create something both functional and visually engaging. Please feel free to check out my profile to learn more about my past work and client feedback. I’d love to connect and discuss the project details further your goals, expectations, and any specific features or ideas you have in mind. The more I understand your vision, the better I can bring it to life. I am ready to get started right away and will put my full energy and focus into delivering quality results on time. My goal is not just to complete the project, but to exceed your expectations and build a long-term working relationship. Looking forward to hearing from you soon! With Regards! Nikhil

@Webtechfusion23

Hi, ➡️ I read your project description about fixing backend crashes and frontend errors in your NestJS + React application on AWS ECS. I understand the critical nature of these issues and am ready to resolve them efficiently. ⏺️ With over 12 years of experience as a Full Stack Developer, I specialize in resolving complex runtime errors and enhancing system stability. My expertise in NestJS, React, and AWS ECS makes me a perfect fit for addressing your systems crashes and inconsistencies. I will focus on critical areas such as null property access, data type consistency, and error handling to ensure robust application performance. Regards, Aftab Ahmad Full Stack Developer (12 Years of experience)

@DeveloperStation

Hi Client, We’ve tackled similar issues with NestJS and React, where we fixed backend crashes and frontend errors caused by inconsistent data handling. We also improved logging and error management to enhance overall system stability. With our extensive experience in AWS, we can optimize your ECS setup for better performance and cost efficiency. We’ve worked with both Fargate and EC2, so we know how to configure services for maximum reliability. Let’s schedule a quick 10-minute call to discuss your project in more detail and see if I’m the right fit for your needs. I’m eager to learn more about your exciting project. Best, Adil

@khurshid040462

Hello, I understand the urgency in addressing the backend crashes and frontend errors you’re encountering with your NestJS and React application on AWS ECS. With extensive experience in debugging and optimizing production systems, I can swiftly identify and rectify the issues outlined. My approach will involve meticulous examination of the backend to safely access properties like '.email', ensuring reliable scheduled jobs, and refactoring the email logic to manage null and undefined data robustly. I also suggest establishing clearer data contracts between the backend and frontend to prevent inconsistent data formats. I recently resolved a similar issue with a multi-module application, stabilizing its ECS deployment and enhancing its error handling significantly. I estimate this can be completed within 10 days. Regards, Khurshid Ahmed

@AhteshamAK

mySQL Hello, I’ve reviewed your NestJS + React system issues and can help you eliminate the recurring crashes blocking ECS deployments. I’ll perform a full audit of backend modules, especially scheduled jobs, to trace every unsafe .email access and apply consistent null-safe logic across notification, reminder, and SendGrid integrations. I will also enforce uniform data formatting so the React Leads page no longer breaks on split errors. AWS ECS health failures will be addressed by stabilizing startup routines and improving logging to prevent silent crashes. Your application will deploy reliably and run without circuit breaker rollbacks. Regards, Ahtesham

@SajidaSaqira

mySQL Hello, You've mentioned the recurring backend crashes and frontend errors in your NestJS + React project on AWS ECS. I have experience in fixing similar issues, such as stabilizing scheduled jobs and refactoring notification logic for safe data handling. In a recent project, I successfully resolved runtime errors and improved system stability for a client using a similar tech stack. For your project, my approach would be to thoroughly analyze the unsafe property access issues, stabilize scheduled jobs, and ensure consistent data types for frontend interactions. Could you provide more details on the current error handling mechanisms in place to better address the root causes of the crashes? To get a better sense of my skills, please visit my portfolio: https://www.freelancer.com/u/SajidaSaqira/SS-Technologies Best regards, Sajida Saqira

@shivamhardia

MySQL Hey, I understand the issue isn’t just isolated bugs; it’s about stabilizing runtime behavior across NestJS services, scheduled jobs, and ECS deployment health checks. I can step in to audit the backend for unsafe property access (especially .email), refactor cron/scheduler logic to safely handle null/undefined values, and harden the SendGrid notification flow. I’ll also standardize API responses to ensure consistent data types, preventing frontend crashes like the .split() issue on the Leads page. On the frontend, I’ll add defensive handling where needed without masking backend inconsistencies. Additionally, I’ll review ECS health checks, container startup flow, and logging to prevent circuit breaker rollbacks, and improve error handling so scheduled jobs don’t terminate the container. Performance and stability optimizations will also be applied across modules. I’ve handled similar NestJS + AWS ECS production stability fixes and can quickly identify root causes and stabilize deployments. Let's connect in chat to discuss and proceed further. Thanks!

@eaglegraphics247

I hope you're doing well! My name is Nawal, and I bring over nine years of experience in [ProjectTitle]. After carefully reviewing your project brief, I’m confident that I understand your needs and can deliver exactly what you're looking for. Here’s what I offer: ✅ Multiple initial drafts within 24 to 48 hours ✅ Unlimited revisions until you're 100% satisfied ✅ Final delivery in all required formats, including the editable master file and full copyright ownership You can check out my portfolio and past work here: ? Freelancer Profile – eaglegraphics247 I’d love to discuss your project further and explore how we can make your vision a reality. Let me know a convenient time for a quick chat! Looking forward to working together. Best regards, Nawal

@arslanshahid386

Hi there, It looks like you're facing some frustrating issues with backend crashes and frontend errors in your NestJS and React application on AWS ECS. From what you’ve shared, it seems the primary problem stems from unsafe property access leading to runtime errors, especially with email handling in your notification services. I would start by thoroughly reviewing the existing code to identify all instances of unsafe access and then implement robust null checks. With 4+ years of experience in developing and stabilizing applications, I can also help refactor your email logic and ensure that the backend consistently returns the correct data formats for the frontend. Additionally, I’d focus on stabilizing your scheduled jobs to prevent those health failures in ECS deployments. One question I have is: have you considered implementing more extensive logging to help track down the root cause of these errors? Best regards, Arslan Shahid

@krisk63

Hi there, I'm Kristopher Kramer from McKinney, Texas. I’ve worked on similar projects before, and as a senior full-stack and AI engineer, I have the proven experience needed to deliver this successfully, so I have strong experience in CSS, PHP, Frontend Development, Flutter and Apple Xcode. I’m available to start right away and happy to discuss the project details anytime. Looking forward to speaking with you soon. Best regards, Kristopher Kramer

@azwa04

mySQL, I’ll start by tracing crash logs (CloudWatch) to isolate all null/undefined access points and patch them with strict validation & safe guards. Then I’ll refactor cron jobs, notification/email services (SendGrid) to handle edge cases and prevent runtime failures. I’ll standardize backend responses (DTOs/TypeORM) to fix frontend .split() errors and ensure consistent data flow. Finally, I’ll stabilize ECS deployment with proper error handling, logging, and health checks so containers run without crashes.

@mhmamun360

Hi, mySQL — I see your system is crashing due to unsafe data handling across backend schedulers and inconsistent responses affecting the frontend, which is also breaking ECS deployments. The goal is to stabilize runtime behavior, ensure safe data flow, and achieve reliable production deployments without failures. I can audit and fix all unsafe property access (especially .email), stabilize cron jobs, and refactor notification/email logic to handle null/undefined safely. I’ll also standardize backend responses so the frontend no longer breaks (e.g., fixing .split() issues) and ensure ECS deployments pass health checks consistently. I’ve worked on NestJS + React systems where fixing data consistency and error handling resolved production crashes and deployment failures. If helpful, I can start with a quick log-based audit to pinpoint all breaking points before applying fixes. If you’d like, I can outline a structured fix plan and timeline. https://www.freelancer.com/u/mhmamun360 Best regards, Injaazh.

@letsgood

Hello, I reviewed your project requirements and understand that you need a developer to build a reliable solution. I’m a Full Stack Developer experienced in React JS, React Native, WordPress, and API integrations. I can help you build a clean, responsive, and scalable application based on your requirements. I focus on quality development, clear communication, and on-time delivery. Could you please share more details about the project features? Best, Abbas

@CodeAnchors

Opening: Greetings! I have carefully reviewed the project requirements for fixing backend crashes and frontend errors in a NestJS + React application deployed on AWS ECS. Understanding the critical issues causing runtime crashes and deployment instability, I am confident in my ability to address and resolve them effectively. Execution Approach: With a focus on structured requirement confirmation, controlled planning, clean implementation, and thorough testing, I will work diligently to identify and fix unsafe property access, stabilize scheduled jobs, refactor notification logic, ensure data consistency, and optimize the Leads page functionality. Professional Positioning: With expertise in NestJS, React, and AWS ECS, I bring a strong technical background to the table. My portfolio showcases successful projects in backend/frontend development, ensuring reliable execution and long-term results. I am committed to delivering high-quality solutions tailored to your specific needs. One thoughtful clarifying question: To better understand your priority, could you provide insights into any specific challenges faced during previous attempts to resolve these issues? I look forward to discussing the project further in an open chat to finalize the scope seamlessly. Best regards, Muhammad Anas Khan.

@amadorjay

Hello, The primary engineering challenge lies in ensuring consistent data handling across the backend and frontend. This inconsistency is likely causing runtime errors during scheduled job executions. Additionally, managing the stability of AWS ECS deployments amidst these crashes poses significant complexity. I would like to clarify a few points. What mechanisms are currently in place to handle errors during scheduled jobs? Is there a specific structure for the response data from the backend that needs to be enforced? Furthermore, how do you envision improving logging to aid in diagnosing these runtime issues? Looking forward to learning more about the architecture.

@Saifkhan642

Hey, I checked your project and I’m ready to make it happen. Simple, fast, and exactly how you want it. Just message me and we’ll begin

@kumarashish99

With more than 5 years of experience in backend development, DevOps and orchestrating scalable solutions, I'm confident about resolving the issues your NestJS-based backend is encountering. From analyzing the traceback you have provided, I can identify that it's likely caused by unsafe access to `.email` in your notification/reminder services. With my skills and experience in granular monitoring using Prometheus, Grafana and New Relic, I will be able to secure the infrastructure and fix the unhandled runtime exceptions during start-up/scheduler execution as this is causing disruption in your AWS ECS deployments. Furthermore, a crucial part of any project is ensuring its security compliance. My knowledge of frameworks like HIPAA, PCI-DSS, GDPR and implementing security measures will assure you that apart from addressing your current issues, I'll also optimize error-handling for improved future stability. Overall, employing me means getting an end-to-end cloud-based solution not only where your present concerns are resolved but where your application is future-ready Meanwhile advancements