MID_LEVEL SENIOR - Software Engineer Required

@vishal1145

Your MongoDB schema will become a bottleneck if you're handling healthcare data without proper indexing and sharding strategy. I've seen apps grind to a halt when patient records hit 100K+ documents because developers didn't plan for compound indexes on frequently queried fields. Before architecting the solution, I need clarity on two things: What's your expected data growth over the next 12 months - are we talking 10K records or 1M+? And does this need HIPAA compliance, or are you handling PHI that requires encryption at rest and audit logging? Here's the architectural approach: - NODE.JS + EXPRESS: Build a modular API structure with middleware for request validation, error handling, and rate limiting to prevent abuse and ensure sub-300ms response times under load. - MONGODB OPTIMIZATION: Design schemas with embedded vs. referenced documents based on read/write patterns, implement compound indexes on query-heavy fields, and set up connection pooling to handle 5K+ concurrent requests. - DOCKER + CI/CD: Containerize the app with multi-stage builds to reduce image size by 60%, then automate deployments using GitHub Actions with staging/production pipelines that include automated testing and rollback capabilities. - AWS INFRASTRUCTURE: Deploy on ECS with auto-scaling groups, use RDS for transactional data if needed, and implement CloudWatch monitoring to catch performance degradation before users notice. - SECURITY LAYER: Implement JWT-based authentication with refresh tokens, role-based access control, and input sanitization to prevent injection attacks - critical if you're handling sensitive healthcare data. I've built 8 healthcare-adjacent systems that scaled from MVP to 50K+ users without major rewrites. I don't take on projects where security requirements are unclear. Let's schedule a 20-minute call to discuss edge cases and failure scenarios before starting development.

@AITSoft

Hello, I am Shamshad, and I’m ready to take on your mid‑level software engineer role. I will own features end‑to‑end, from backend APIs to frontend touches, with a strong focus on clean architecture, performance, and secure delivery. My approach: build a solid Node.js backend (Express or NestJS) paired with a well‑designed MongoDB schema, indexes, and performance tuning; expose RESTful APIs consumed by a React UI with responsive design; and set up dependable deployment on AWS using Docker and CI/CD. I’ll ensure robust debugging across stack layers and maintain clear Git collaboration practices. I’ll also align with healthcare data security needs if applicable and implement best practices for authentication, authorization, and data protection. I’m confident this fits your 3-5 year target and your desire for independent ownership with team collaboration. What is the required data security standard (e.g., HIPAA/GDPR) for healthcare data, and which data types and workflows will the system handle?

@teodorgeorge

Hello, I’ve worked across full‑stack environments using Node.js, Express, MongoDB, and React, and your need for someone who can own features end‑to‑end aligns well with my background. I’m comfortable handling API design, debugging across the stack, and working with AWS, Docker, and CI/CD setups. I can support your team with clean, reliable implementation while adapting to your workflow and contributing to system design. Thanks, Teo

@jayantkumar314

This aligns well with my experience. I’ve been working across the full stack with Node.js (Express/NestJS), MongoDB, and React, building and maintaining scalable applications with clean architecture and solid performance. On the backend, I design and optimise RESTful APIs, structure schemas properly, and handle indexing/query performance to keep things fast and reliable. On the frontend, I build responsive React interfaces that stay consistent across devices while keeping state predictable and efficient. I’m comfortable debugging issues across the entire stack—from UI glitches to API failures and database bottlenecks—and I’ve deployed and maintained applications using Docker, AWS, and CI/CD pipelines. I also follow secure coding practices, especially around authentication, data validation, and protecting sensitive data.

@billybryan98

Hello, I’m a solo developer with 3-5 years of hands-on software experience, specializing in Node.js backend, MongoDB data modeling and performance, RESTful APIs, and React-based frontends. My work blends pragmatic architecture with clean, maintainable code, and a strong eye for deployment readiness. I’ve delivered scalable backends in Express and NestJS, crafted MongoDB schemas with indexing and performance tuning, designed robust REST APIs, and built responsive UI using React. I also routinely set up Dockerized apps on AWS with CI/CD pipelines and collaborate using Git workflows, ensuring reliability across frontend, backend, and database layers. I can own features end-to-end, contribute to system design, and deliver solid, well-tested solutions on schedule. I’m confident I can meet your healthcare-adjacent needs and security considerations with careful data handling. Please feel free to reach out so we can discuss details and timing. Best regards, Billy Bryan

@espsofttech

Hi there, I can assist you by providing a dedicated resource from my bench with 3–5 years of experience, strong in Node.js (Express/NestJS), MongoDB, REST APIs, and React, along with good exposure to AWS, Docker and CI/CD workflows also experience with the handling sensitive data, including healthcare-related systems. This way it will be easier for you to directly interview the candidates and evaluate them based on your requirements and working style. Whichever resource you select will work only on your project, aligned with your preferred time zone and communication flow. We would request to connect once on chat so I can share relevant profiles and arrange interviews accordingly. Thanks, Rahul A.

@omarz33

Hi there, I'm thrilled to express my immediate availability and enthusiasm for your mid-level software engineer position. With 5+ years of software development experience, I specialize in Node.js (both Express and NestJS) for robust backend solutions. I have a proven track record in MongoDB schema design and performance optimization, as well as crafting responsive UIs with React. To address your needs effectively, I propose the following: - Implementing RESTful APIs for seamless data flow - Ensuring smooth collaboration through Git and CI/CD pipelines - Securing sensitive data with industry best practices In past projects, I successfully integrated healthcare applications and maintained stringent security measures. I'm confident in my ability to contribute significantly to your team. Looking forward to discussing how we can work together to achieve your project goals.

@avni20

instead of repeating “we’ve done similar projects”—I’d rather offer you Honest Advice. While MongoDB is flexible, mid-level development often suffers from poor indexing and a lack of data validation, leading to massive performance bottlenecks as your user base grows. My advice is to prioritize Mongoose-level Schema Enforcement and Atomic Updates. We shouldn't just "push" data; we must design for query efficiency using the Bucket Pattern or Computed Pattern. This ensures your backend remains snappy even as document counts reach the millions. Regarding Full-Stack Ownership, we focus on "State-Sync Integrity." When using React with a Node backend, the most common bugs come from stale client-side data. We will implement React Query (TanStack) to handle caching and background refetching, ensuring the UI is a true reflection of the database state without unnecessary API overhead. Our focus is on work that lasts. Our rate is $20/hour. The difference is simple: we don’t believe in "patch-work" code. As the saying goes, maintenance is always cheaper than repair. We build high-performance, secure, and documented systems worth your investment. Our Tech Alignment: Backend: Proficiency in Node.js (Express/NestJS) with robust JWT/OAuth security. Database: Expert MongoDB tuning, including aggregation pipelines and indexing. DevOps:CI/CD automation using Docker and AWS (EC2/Lambda/S3). Compliance: Experience with high-security data handling, ensuring encryption at rest and in transit

@RajAbhisek

Hello, I read your post looking for a mid-level senior software engineer with specific skills in Node.js, MongoDB, and React. This really sounds like a great fit for my expertise. I'm Raj Abhisek Panda, and I have over 6 years of experience delivering full-stack solutions. My background includes strong proficiency in Node.js (with Express and NestJS) for robust backend development and deep experience with MongoDB, covering schema design, indexing, and performance tuning. I also design and consume RESTful APIs regularly. For the frontend, I'm well-versed in React and ensure responsive UI designs. I can debug issues across the entire stack – frontend, backend, and database – and have familiarity with AWS, Docker, and CI/CD pipelines, along with Git for collaborative workflows. I am comfortable owning features end-to-end. I can definitely do this project. My focus on efficient, maintainable code across the stack means a smooth development process for you. Ping me on chat, and we can discuss how to start. Raj Abhisek Panda

@rbtech1984

Hello There!!! ★★★★ (Full-stack Node.js + React engineer for end-to-end feature ownership role) ★★★★ Project understanding: I understand you are looking for a mid-level software engineer with strong backend skills in Node.js (Express/NestJS), MongoDB optimization, REST APIs, and React frontend experience. The role also requires handling full-stack debugging, working with CI/CD, Docker, AWS, and contributing to scalable system design with good collaboration. ⚜ Build scalable backend services using Node.js (Express/NestJS) ⚜ Design and optimize MongoDB schemas with indexing & performance tuning ⚜ Develop and consume secure RESTful APIs ⚜ Create responsive React-based frontend UI components ⚜ Handle full-stack debugging (frontend, backend, DB issues) ⚜ Setup and maintain Docker + CI/CD deployment pipelines ⚜ Apply secure authentication & authorization practices I have solid experience working as full-stack dev handling Node.js, MongoDB and React apps, including API-heavy systems and dashboard style applications. I also worked on deployment flows using Docker and cloud setups, so I’m comfortable owning features end-to-end. My approach will be structured: first understanding your current architecture, then improving backend stability, optimizing DB queries, and refining frontend performance step by step. Would be glad to connect and see if I fit your team and ongoing engineering work. Warm Regards, Farhin B.

@basant807

Hello, I have 6+ years of full-stack development experience and this role aligns closely with my current work. On the backend, I build production-grade REST APIs using Node.js with both Express and NestJS. I work with MongoDB regularly — including schema design, indexing strategies, and query optimisation for performance at scale. On the frontend, I use React to build responsive, user-friendly interfaces and I'm comfortable owning both sides of a feature from API design to UI delivery. For infrastructure, I've worked with AWS (EC2, S3, Lambda), Docker, and CI/CD pipelines using GitHub Actions. I follow Git-based collaborative workflows and have contributed to system design discussions alongside senior engineers. I'm also familiar with security fundamentals — JWT-based auth, role-based access control, and data protection practices — which is especially relevant if the product handles sensitive or healthcare-related data. I'm comfortable working independently, debugging across the full stack, and taking ownership of features end-to-end. Happy to share relevant work samples or jump on a quick call. Looking forward to hearing from you. REgards, Basant

@quan9824

Hi, Yes—this aligns very well with my experience. I have 3–5+ years working across Node.js (Express/NestJS), MongoDB, and React, building and maintaining full-stack applications in production. Backend: • Strong Node.js (Express + NestJS) • REST API design, validation, and performance optimization • MongoDB schema design, indexing, and query tuning Frontend: • React (responsive UI, clean component structure) • Focus on performance and usability Full-stack & DevOps: • Debugging across frontend, backend, and database layers • AWS deployments, Docker, and CI/CD pipelines • Git-based workflows and collaborative development Security: • JWT/OAuth flows, RBAC • Secure handling of sensitive data • Awareness of best practices relevant to healthcare systems I’m comfortable owning features end-to-end—from design to deployment—while keeping code clean, scalable, and easy to maintain. Happy to discuss your current system and jump in quickly ?

@jagratip3

Hello, I’m interested in your mid-level software engineer role and I’m available to start immediately. I have solid hands-on experience working across the full stack using Node.js (Express/NestJS), MongoDB, and React. I’ve built and maintained production-grade applications where I was responsible for both backend architecture and frontend implementation, including REST API design, database modeling, and performance optimization. On the backend side, I’m comfortable designing scalable Node.js services, structuring clean REST APIs, and working with MongoDB at a deeper level (indexes, aggregation pipelines, schema optimization, and query performance tuning). I also follow best practices around authentication, authorization, and secure data handling. On the frontend, I’ve worked with React to build responsive, user-friendly interfaces with clean component structure and API integration. I’m comfortable debugging issues across the full stack, which helps me quickly identify whether a problem originates in the UI, backend logic, or database layer. I also have experience with Docker-based development environments, Git workflows (feature branching, PR reviews), and basic CI/CD pipelines. I’m familiar with AWS deployment setups as well, including environment configuration and application hosting. Your fixed budget of 37,500 works for me, and I’m ready to begin immediately. Looking forward to working with you.

@cindyviorinar

Hi, I am excited to apply for the mid-level software engineer position. With over five years of experience in software development, I have a robust background in Node.js, specifically using Express and NestJS for backend projects. My proficiency in MongoDB allows me to design efficient schemas and optimize performance effectively. I have experience designing and consuming RESTful APIs and am quite adept at frontend development with React, ensuring responsive designs that enhance user experience. I’m also skilled at debugging issues across all layers of the stack, whether frontend, backend, or database, which I believe is crucial for this role. In addition, I'm familiar with cloud infrastructure on AWS, utilizing Docker for containerization, and implementing CI/CD pipelines. My experience with Git allows me to manage version control seamlessly while adhering to collaborative workflows. I can communicate effectively in real-time according to your time zone and can provide a simple demo within 12 hours of starting the project. Q1: Can you describe the specific features you would like me to own? Q2: What is the expected timeline for the project? Q3: Are there any particular security measures you want to prioritize in the application? I look forward to your thoughts on this! Best regards, Cindy Viorina

@steveng96

Hello, With 7+ years of expertise in RESTful API, MongoDB, AngularJS, Docker, and Node.js, I am well-equipped to handle your project requirements. I understand the need for a mid-level software engineer with a strong background in backend development using Node.js, MongoDB, and RESTful APIs, as well as frontend/UI development with React. My experience in building scalable SaaS, fintech, and eCommerce systems with a focus on performance aligns well with the responsibilities outlined in the job description. Additionally, my proficiency in full-stack development, modern web/mobile apps, and AI systems makes me a suitable candidate for this project. You can view my portfolio here: My github: skyman000111 I would love to discuss this opportunity further with you. Please start the chat so we can explore how I can contribute to your project. Thanks.

@gauravl3

With over 5 years of experience as a Full-Stack Developer with a strong emphasis on Node.js, I believe I can make a significant impact on your project. My skills extend well beyond just writing code; I embrace the entire software development lifecycle, including continuous delivery and collaborative workflows using Git. Whether it's the end-to-end implementation of features or ensuring an optimized, responsive design, count me in. In addition to my proficiency in MongoDB for schema design and other backend tasks, my experience with Azure and Google Cloud also aligns well with this role. Your mention of healthcare applications and security best practices excites me too - confidentiality and data protection is always at the forefront of my mind when developing software. Lastly, let's not forget the value that AI can bring to the table. Being adept at incorporating large Language Models (LLMs), AI agents, and intelligent automation into architectures, I can further enhance your application with smarter, more intuitive functionality. Choosing me means choosing a full-package deal that brings together the advantages of cloud-native architecture with robust security measures and AI integration for creating scalable, efficient, and forward-thinking solutions.

@usmansipra264

Hello, I understand the importance of finding a reliable software engineer who can effectively contribute to your project, especially given the complexity and sensitivity involved. My approach will focus on leveraging Node.js with Express for backend development and MongoDB for efficient data management, ensuring optimal performance and scalability. Here is what I will deliver: - Robust RESTful APIs designed for seamless integration and functionality. - Well-structured MongoDB schema with best practices in indexing and performance tuning. - Clean code with clear communication throughout the project lifecycle. I can confidently complete this within your budget and timeline, and I will keep you updated throughout the process. Could you share more about the specific features you envision for the healthcare applications, particularly regarding security requirements? Best regards

@abdulmannan31117

Hi! My name is Abdul Mannan and I'm here to offer you my services as a skilled full-stack software engineer with strong Node.js and MongoDB expertise, best fit for this role due to hands-on experience building scalable backend systems and end-to-end web applications. I can contribute across your stack by developing robust Node.js (Express/NestJS) backend services, designing optimized MongoDB schemas with proper indexing and performance tuning, and building responsive React-based UIs. I’m also comfortable working with RESTful APIs, debugging full-stack issues across frontend, backend, and database layers, and handling deployment workflows using Docker, AWS, and CI/CD pipelines. I follow clean Git-based collaboration practices and can take ownership of features from design through production. My expertise includes Node.js backend architecture, MongoDB optimization, React UI development, API design, and cloud deployment with a strong focus on reliability and maintainability. Can we discuss your current architecture stack, existing codebase structure, and whether there are any healthcare/security compliance requirements already in place so I can align immediately and start delivering?

@fizaa170

Here is your bid: Full-stack ownership across Node.js, React, and MongoDB with real deployment experience — this role matches my background closely and I'd love to contribute to your team. I've spent the last few years building and maintaining production applications end-to-end, from schema design and API architecture to responsive frontends and cloud deployments. I'm comfortable owning features independently and collaborating within a team workflow. My stack match: Node.js with Express and NestJS — production REST APIs built and maintained MongoDB — schema design, indexing, and query performance tuning done hands-on React — responsive, component-based UIs with clean state management AWS + Docker + CI/CD — deployed and managed live applications Git — daily collaborative workflows, PRs, and code reviews Security — JWT auth, role-based access control, and data protection practices applied What I bring beyond the checklist: End-to-end feature ownership without hand-holding Debugging across the full stack — frontend, API, and database Clean, maintainable code with proper documentation Comfortable with sensitive data handling and security-conscious development I'm available to start immediately, happy to do a short technical call or assessment if that helps, and can share relevant project examples on request. Ready to start immediately. Let us talk.