Senior Full Stack Developer Needed for Secure Financial Data Tracking Platform

@sptechnocrats

As the founder and CEO of Shanti Infotech, I can positively say that we are the best fit for your senior full-stack developer project. With over 11 years of experience successfully delivering 2500+ projects, including complex financial data tracking platforms, we know how to turn your vision into a practical, scalable reality. Our team includes 250+ experienced engineers, designers, and product specialists who excel in the specific skill sets required for your project. We have extensive knowledge in using Node.js + Express, PostgreSQL + Redis for data processing and storage, REST API design for seamless integration with other systems, WebSocket for real-time data streaming, and deploying on platforms like Railway.app. Moreover, our developers are proficient at creating lightweight SDKs in JavaScript and Python and publishing them on npm and PyPI respectively. This allows third-party developers to integrate with ease – an essential consideration that's already an integral part of your project specification! Trust Shanti Infotech to deliver high-quality code on time and within budget. Let's build robust technology solutions that move your business forward!

@utamshingala

Hi- As the ideal candidate for your project, I bring over 5 years of hands-on expertise in full-stack development À la carte, but most importantly, I have a true grasp of the powerful potential and importance of the intricate work being orchestarted by your platform. Having worked on projects in various sectors including fintech, much like yours, I possess the nuanced understanding and abilities to effortlessly pul information from multiple external APIs. This inclusive customized feature is one which I have actively contributed towards its improvement in different sectors. Let’s connect to discuss the details! Best, Uttam

@techwelfare

Hi I am confident in my ability to build the sophisticated platform you require for your financial data tracking project. Over the past 3+ years, I have honed my skills in REST API design and implementation, PostgreSQL and Redis database management, as well as WebSocket integration. My hands-on knowledge will allow me to seamlessly construct a robust backend with 10-15 endpoints using the aforementioned technologies. Let’s discuss in more details so i could quote in details. I could start immediately. Let me know if you would like to see our previous work. Best Regards Techwelfare

@kishanbwts

I’ve built multi-API platforms that normalize data and serve clean responses, including real-time updates using WebSockets. For a financial project before, I handled failover strategies where cached data ensured uptime when sources timed out, which fits your needs perfectly. For the Node.js backend, I’ll design efficient REST endpoints with caching via Redis to manage rate limits and speed. WebSocket support will push live updates seamlessly to your apps. I’ve published npm and PyPI SDKs before, focusing on simple, well-documented one-liner methods so third-party devs can integrate quickly. A couple of questions: Do you have preferred API rate limits you want enforced in Redis? Also, for error fallbacks, should the caching layer prioritize specific external APIs when available? I’m ready to start building your secure, fast financial data platform and SDKs on Railway with smooth GitHub deployment. Let’s get this live.

@gaurangdev

Hello There, I hope you are doing well! I have strong experience with Node.js and Express, designing clean REST APIs with PostgreSQL and Redis for caching, rate limiting, and performance optimization. I’ve also implemented WebSocket streaming, fallback logic with cached responses, and production deployments with auto-deploy pipelines. Building structured, reliable APIs that other apps depend on is something I take seriously. On the SDK side, I can create well-typed, developer-friendly JavaScript and Python packages with clear abstractions, solid documentation, and proper npm/PyPI publishing workflows. My focus will be making integration feel simple, clean one-liner methods, strong error handling, and clear examples. I’d love to review your API sources and discuss architecture decisions so we can structure this cleanly from day one. Let’s connect and map the implementation plan. Thanks & Regards!

@amitarai

Hi, I can help you build this platform end-to-end. I have strong experience with Node.js + Express, PostgreSQL, Redis, REST API design, and WebSockets. I can: Build your 10–15 REST endpoints Integrate and normalize data from external APIs Add Redis caching and rate limiting Implement fallback logic using cached data Set up WebSocket real-time streaming Deploy on Railway with auto-deploy from GitHub I can also create and publish both: JavaScript SDK (npm package) Python SDK (PyPI package) Clean code, proper documentation, and production-ready setup guaranteed. Let’s connect and discuss the details.

@Srashtasoft

Hello, I understand you’re building a data aggregation platform that collects from multiple external APIs, normalizes responses, and delivers structured data to web/mobile apps—along with lightweight JavaScript and Python SDKs for third-party integration. I can help you design and deliver a scalable, developer-friendly backend and SDK ecosystem. Here’s how I will approach your project: 1. Build a robust Node.js + Express REST API (10–15 endpoints) with clean architecture. 2. Implement PostgreSQL for user/config data and Redis for caching, rate limiting, and failover handling. 3. WebSocket integration for real-time streaming updates. 4. Resilient error handling with fallback to cached data when sources fail. 5. Deployment on Railway with GitHub auto-deploy pipeline. 6. JavaScript SDK (npm) and Python SDK (PyPI) with simple wrapper methods and full documentation. I have strong experience building scalable APIs, real-time systems, and publishing production-ready SDKs with clear developer documentation. Estimated timeline: 3–4 weeks including testing and package publishing. A couple of quick questions: • How many external APIs will be integrated initially? • Do you require API authentication (API keys, OAuth, etc.) for SDK users? Let’s set up a quick call to discuss things better. Let’s discuss it more in chat. Best Regards, Jemin Sagar

@irazon15

I’ll architect a resilient Node.js + Express API with PostgreSQL + Redis, smart caching, rate limiting, WebSocket streaming, and fallback logic to ensure uninterrupted structured responses. Clean REST design (10–15 endpoints), auto‑deploy via Railway + GitHub CI/CD. Alongside the core API, I’ll build and publish polished JavaScript (npm) and Python (PyPI) SDKs with clear docs and one‑liner integrations—developer‑friendly, scalable, and production‑ready.

@thinkbotictech

Hello sir I can build your full data-aggregation platform with a scalable Node.js + Express API, Redis caching/rate-limiting, PostgreSQL persistence, and WebSocket streaming with failover-to-cache logic. I’ll structure clean, versioned REST endpoints and deploy via Railway with automated CI/CD from GitHub. Additionally, I’ll deliver well-documented JavaScript (npm) and Python (PyPI) SDKs with typed wrappers and usage examples for seamless third-party integration. Questions: What is the expected request volume and rate-limit policy per client? Do you require API key-based auth, OAuth, or both?

@abbas021

Hello Kumar A., I’ve gone through your project description carefully, and I’m confident that I can handle this project efficiently. We are an expert team which have many years of experience on JavaScript, Python, Node.js, PostgreSQL, Redis, Git, API Development, API Integration, REST API Lets connect in chat so that We discuss further. Thank You

@sumanj555

Hello, Greetings! I’m a senior full-stack developer with 6+ years of experience in building scalable mobile and web applications. I specialize in cross-platform and native mobile development using Flutter, React Native, Swift (iOS), and Kotlin/Java (Android), along with strong backend expertise in Node.js, Django, FastAPI, and Laravel, supported by modern cloud technologies. My team and I build end-to-end mobile solutions including custom dashboards, internal tools, automation systems, role-based platforms, secure APIs, real-time features, payment integrations, push notifications, and complete app store deployments. We focus on creating smooth user experiences, clean architecture, and reliable performance. We’ve worked on numerous mobile projects with different requirements and complexities, helping clients turn their ideas into well-designed, high-performing applications. Your project aligns well with our technical skills and development approach. I’d be happy to discuss your project scope, ideas, and goals, and suggest the best technical approach. Best regards, Suman Joshi

@jdbsoftech

Hello Dear, I am Jagmohan Kumawat, a multidisciplinary digital expert with 5+ years of experience building luxury websites, mobile apps, digital marketing, automations, intelligent systems and high impact creative assets. My focus is always on delivering results with precision, style and longterm scalability. Signature Excellence • Luxury Websites & Web Systems • iOS & Android Mobile App Development • Custom API Integrations • Advanced Workflow Automation & AI Systems • Salesforce CRM Setup, Flows & Cloud Integrations • Professional Branding & UI/UX • Social Media Content & Digital Strategy • E-Commerce Systems & Automation • Premium Video Creation & Cinematic Editing Technology & Creative Mastery Node.js | React | Laravel | WordPress | PHP | JS | Shopify | Android/iOS | Salesforce Cloud | CRM Automations | REST APIs | Firebase | AI Solutions | Figma | Adobe Suite (Illustrator, Photoshop, Premiere Pro, After Effects) Canva Pro | AutoCAD | Motion Graphics & AI Video | Digital Marketing | Content Writer | SEO/SMO I’m ready to take your project forward with precision, creativity and technical excellence. Feel free to share more details. I will prepare a customize plan for your exact needs. Best Regards Jagmohan Kumawat

@akshaygejge

Hello, Thanks for posting this opportunity. It must be overwhelming going through all those bids. I'll keep mine short. I meet your requirement. Comfortable with pay. My approach ensures: Fast, reliable API responses with Redis caching Error handling with fallback for any failing source Clean, maintainable code with clear documentation Production-ready deployment with auto-update from GitHub I can dedicate full-time focus to deliver a polished, production-ready solution within your timeline. I’m happy to discuss further details, clarify endpoint requirements, and align on milestones. Kindly allow me to work with you on this. Best regards, Akshay

@NaveenVajrad21

I can build your Node.js + Express API with PostgreSQL, Redis caching, and WebSocket support, plus deploy on Railway with CI/CD. I’ll also develop and publish clean JavaScript and Python SDKs with full documentation for seamless third-party integration.

@manngurjar13

Here’s a shorter, high-impact Upwork proposal: Proposal: API Platform + JS & Python SDK Development Hi, I can help you build a clean, scalable API layer that aggregates external data, normalizes it, and serves structured responses to web/mobile apps — along with lightweight JS and Python SDKs for third-party developers. I have 3+ years of experience with Node.js, Express, PostgreSQL, Redis, and WebSockets, building production APIs with caching, rate limiting, failover handling, and real-time streaming. What I’ll Deliver: Node.js + Express REST API (10–15 endpoints) PostgreSQL schema + Redis caching layer WebSocket support for real-time updates Fallback logic (serve cached data if source APIs fail) Deployment on Railway with GitHub auto-deploy JavaScript SDK (npm package) Python SDK (PyPI package) Clear documentation with examples I focus on clean architecture, performance, and developer-friendly design. Happy to discuss scope and timeline. Best, Manoj

@anjali0940

Hi, I’m a backend developer with 3+ years of experience in Node.js, Express, PostgreSQL, Redis, and WebSocket architectures. I can build your REST API with caching, fallbacks, real-time streaming, and Railway auto-deployment—plus deliver clean, well-documented JavaScript (npm) and Python (PyPI) SDKs for seamless integration. Ready to discuss architecture, timeline, and milestones. Best Regards Anjali

@uttraBhargav07

I am a Full Stack Developer with experience building scalable REST APIs and integrating multiple external data sources. I have worked with Node.js, Express, PostgreSQL, Redis, WebSockets, and cloud deployments. For this project, I will build a robust API server that pulls and normalizes data from multiple external APIs, implements caching with Redis for performance and rate limiting, and supports real-time streaming via WebSockets. I will also ensure proper error handling with fallback mechanisms to serve cached data if a source fails. I have experience deploying applications on cloud platforms with CI/CD pipelines and GitHub auto-deploy workflows. Additionally, I can develop lightweight JavaScript and Python SDKs with full documentation and examples, and publish the JS SDK to npm. I am detail-oriented, communicate clearly, and provide regular progress updates. I am available for up to 40 hours per week and can start immediately. Looking forward to discussing your requirements. Thank you.

@nikunjtechgeek

Hello Kumar, hope you’re doing well. Scalable API layer can be structured with clean endpoint design, Redis-backed caching and rate control, and fallback handling to keep responses stable even when upstream sources fail. SDKs will wrap endpoints into simple developer-friendly methods with clear docs, enabling fast third-party adoption across JS and Python ecosystems. Happy to connect and align on architecture and rollout. Regards, Nikunj