Back-End Engineer for Financial Trading System

@AwaisChaudhry

Dear Client, I’m Muhammad Awais, ready to build a solid back-end for your financial trading system. I will focus on real-time data handling, reliable APIs, and a scalable architecture that fits a medium-scale setup without over-engineering for high-frequency needs. My approach combines Node.js for the core services, websockets for live feeds, and a robust data layer with NoSQL (like MongoDB) and structured APIs to keep data consistent and fast access at scale. I’ll align with your listed skills and deliver clean, modular code that’s easy to maintain and extend as your market data grows. I will: - design stable event-driven services with efficient error handling and replay capabilities - implement secure, low-latency API endpoints for trading data and order flow - set up reliable real-time streams and historical data storage for analytics - ensure testing, monitoring, and deployment processes are in place from day one Write a single, focused question about the project scope to prompt a reply from the client, tone should be assertive and concise Best regards,

@corpmember29

REAL-TIME FINANCIAL DATA SYSTEMS BUILT FOR SPEED, ACCURACY AND SCALABILITY As per the job pos, we bring 12+ years of IT experience delivering high-performance backend systems across trading platforms, real-time data pipelines, AI, blockchain, and API-driven architectures. We clearly understand the requirement for a medium-scale financial data system handling real-time market feeds, APIs, and WebSocket-based streaming with reliability and low latency. TECH STACK: Node.js (backend), WebSockets (real-time streaming), REST APIs, Redis (caching/pub-sub), PostgreSQL/MongoDB (data storage) WORKFLOW: Market Data Sources → API/WebSocket ingestion → normalization layer → real-time processing engine → client streaming via WebSockets → frontend/dashboard consumption USER ROLES: • Traders/Users: consume live market data, charts, updates • Admin: manage data sources, API keys, system monitoring • System: handles ingestion, processing, and distribution of real-time feeds CORE FEATURES: • Real-time market data streaming via WebSockets • API aggregation layer for multiple financial sources • Low-latency data processing pipeline • Scalable backend architecture for medium load systems • Data caching for performance optimization • Monitoring & error handling for continuous uptime

@Microlent

Hi, this aligns well with the kind of real-time backend and workflow systems I’ve worked on recently especially applications involving live data handling, WebSocket communication, APIs, and scalable dashboard architectures. Relevant work: • Finance SaaS Platform • Custom CRM/dashboard systems with API-driven architecture • More portfolio & case studies: https://www.freelancer.com/u/microlent Approach: • Build scalable Node.js/WebSocket backend architecture for reliable real-time data flow • Optimize API communication, event handling, and medium-scale performance stability • Structure clean, maintainable services with monitoring and efficient data synchronization Tech experience includes Node.js, WebSockets, PostgreSQL, REST APIs, real-time integrations, and scalable dashboard systems. I’d be happy to discuss your current architecture, data flow requirements, and the best approach for balancing scalability with performance. ~ Rajesh

@DeveloperStation

Hi, We’ve built several web apps that handle real-time data and integrate with multiple APIs, including a trading platform that connects with brokers like Binance and Alpaca. We’re experts in Node.js, Python, and PHP, and we can work with any language you prefer. We also have strong DevOps capabilities, so we can set up CI/CD pipelines and manage servers to ensure your app is secure and reliable. Let’s schedule a 10-minute call to discuss your project in more detail and see if I’m the right fit. I usually respond within 10 minutes. I’m eager to learn more about your exciting project. Best regards, Adil

@mrresearcher99

Hi there, I’ve reviewed your Node.js project requirements and would love to help. With 5+ years of experience in backend and API development, I specialize in building fast, scalable, and secure applications using Node.js, Express, and MongoDB. I’ll start with a clear architecture plan, provide regular progress updates, and ensure the solution is well-tested, efficient, and production-ready. Let’s connect to discuss your project in detail — I’m ready to get started! Best, Bhargav Node.js Developer | Backend & API Expert

@toriquldev123

Hello Dear! Greetings from Toriqul Global Solutions! We are pleased to introduce our company as a reliable and experienced provider of Web Design & Development services. Founded and led by Engineer Toriqul Islam, a B.Sc. graduate in Computer Science & Engineering from Rajshahi University of Engineering & Technology (RUET), our team brings over 10 years of industry experience. At Toriqul Global Solutions, we specialize in building modern, user-friendly, and high-performance websites that help businesses grow and stand out in the digital world. Our design approach focuses on simplicity, elegance, and functionality to ensure maximum user engagement. I have some question-- Technologies We Use: Custom Websites Development Using ======>Full Stack Development. 1. HTML5 2. CSS3 3. Bootstrap4 4. jQuery 5. JavaScript 6. Angular JS 7. React JS 8. Node JS 9. WordPress 10. PHP 11. Ruby on Rails 12. MYSQL 13. Laravel 14. .Net 15. CodeIgniter 16. React Native 17. SQL / MySQL 18. Mobile app development 19. Python 20. MongoDB We would be honored to discuss your project requirements and help bring your ideas to life. Thank you for your time and consideration. Warm Regards, Toriqul Global Solutions

@vipinjain1213

Hello, Real-time trading systems are less about features and more about consistency and latency. Handling live data streams, price updates, and API reliability without lag or data mismatch is where most systems struggle, especially once multiple users or feeds are involved. I’ve worked on backend systems using Node.js with WebSockets for real-time updates, handling streaming data, API integrations, and structured event processing. the focus is usually on keeping data flow predictable and fast while avoiding sync issues between services. Comfortable working with: Node.js backend architecture WebSockets for live data streams REST APIs and third-party integrations Data handling for medium-scale systems One thing I’d want to clarify: what kind of data are you streaming, market prices, order data, or analytics feeds? We can go deeper on approach and timelines on chat.

@ashinnd84

Hello there, we are a team of Senior Full Stack Web and Mobile App Developers, AI, ML experts. We can do this project. Please, send me a message to discuss the work. Thanks Ashish Kumar.

@billybryan98

Hello there, I hope you are doing well. I’m a backend developer with a strong background in financial data systems and real-time processing. I focus on robust API design, data ingestion pipelines, and scalable Node.js services to handle streaming market data and medium-scale APIs without the complexity of high-frequency trading. In past projects I’ve built and maintained Node.js backends with WebSocket feeds, REST APIs, NoSQL data stores, and microservices that coordinate streaming market data with reliability and low latency. I emphasize clean architecture, solid error handling, and clear interfaces for downstream analytics or dashboards. I can handle the work based on my expertise and past experiences, delivering a solid, maintainable backend that meets real-time data needs and API requirements. I’m confident I will deliver high quality work on time. Please feel free to contact me so we can discuss more details. I am looking forward to the chance of working together. Best regards, Billy Bryan

@IvBursuc

Seeking experienced backend or full-stack engineers with a background in financial markets and trading data systems. Must be comfortable handling real-time data, APIs, on a medium scale. (No need for High Frequency Trading experience.) Please share relevant projects, languages and experience. (Node.js, websocket, etc.)

@kishanbwts

I have worked on backend systems processing real-time trading data for mid-size financial platforms. I understand the challenge of handling streaming data and APIs smoothly without the complexity of high-frequency trading. Based on your needs, I’d focus on building a robust backend in Node.js using WebSocket for real-time data feeds, ensuring low latency and reliability. I’d also implement efficient data buffering and error handling to keep the system stable under varying loads. Have you already defined the core data endpoints and authentication methods? Knowing this will help me plan the API structure clearly. Also, are there specific trading instruments or data formats involved? I’ve helped a fintech client optimize their data pipeline to reduce delays and improve scalability, which is relevant here. This kind of problem can be addressed swiftly with the right architecture and tooling. Ready to jump in and start mapping out the backend flow as soon as you are.

@abdulhamidh2

Hi, I can help your project perfectly. Seeking experienced backend or full-stack engineers with a background in financial markets and trading data systems. Must be comfortable handling real-time data, APIs, on a medium scale. (No need for High Frequency Trading experience.) Please share relevant projects, languages and experience. (Node.js, websocket, etc. Abudul

@marjanahmed13

Hi! My name is Marjan and I'm here to offer you my services as a skilled applicant with over a decade of experience working on Freelancer.com. l believe I am the best fit candidate for this project due to my extensive experience; I would like to have a discussion to get to know that we both are on the same page. Once the scope will be locked, I will start working on it right away.

@prashanpatel557

Hello, I have experience building real-time trading and financial data systems using Python, Flask/FastAPI, WebSockets, REST APIs, and broker integrations. I’ve worked on live trading dashboards, TradingView webhook automation, Zerodha/Upstox integrations, and scalable event-driven systems handling real-time market data and execution workflows. I am comfortable working with: • Real-time WebSocket streams • API integrations and async processing • Node.js / Python backend systems • Medium-scale trading infrastructure • Logging, monitoring, and deployment on VPS/cloud servers Recent work includes: • Automated trading systems with broker APIs • Real-time market dashboards • TradingView → execution bridges • Multi-user financial monitoring tools I can quickly adapt to your existing architecture and contribute to backend development, API handling, and trading-data workflows with clean, maintainable code. Available to discuss your stack, architecture, and ongoing development needs.

@chiragpipal

⚠️ If you're not happy, you don’t pay. ⚠️ Hi there, Thank you for checking my proposal and sharing the detailed project brief. I can build your backend or full-stack engineering project for financial markets using Node.js and websocket with a scalable and performance-optimized design. I will deliver: • Real-time data management • API integration • Medium-scale system development • Websocket implementation You will also receive: • Comprehensive documentation I am confident I can execute your vision professionally and efficiently. Looking forward to discussing timeline and next steps. Best regards, Chirag.

@rbtech1984

Hi There!!! ★★★★ ( Backend trading system with real-time API and WebSocket data handling ) ★★★★ I understand you need a backend or full-stack engineer with financial trading system experience, focused on real-time market data, APIs, and medium-scale data handling using Node.js and WebSockets, without HFT complexity. ⚜ Real-time data streaming (WebSocket integration) ⚜ Node.js backend architecture development ⚜ REST API design & integration ⚜ Financial data processing systems ⚜ NoSQL/MongoDB database handling ⚜ Scalable backend structure for trading flows ⚜ Debugging & performance optimization I have experiance building backend systems with Node.js, API integrations, and real-time data workflows. I understand data-driven applications where latency and accuracy matters, and I focus on clean, stable architecture with proper event handling. I will structure APIs, manage data flow efficiently, and ensure smooth real-time updates with reliable socket communication. Let’s connect and discuss your trading system requirements further. Warm Regards, Farhin B.

@jagratip3

Hello, I have 10+ years of experience as a backend/full-stack engineer, with strong hands-on work in real-time systems, APIs, and data-driven applications. "Seeking experienced backend or full-stack engineers with a background in financial markets and trading data systems. Must be comfortable handling real-time data, APIs, on a medium scale. (No need for High Frequency Trading experience.) Please share relevant projects, languages and experience. (Node.js, websocket, etc.)" I’ve built systems using Node.js, WebSockets, and event-driven architectures to handle live data streams, notifications, and API integrations reliably at scale. I’m comfortable designing clean, maintainable backend systems with strong performance and stability. Happy to share relevant projects and discuss further. Regards, JP

@nicolasalexandro

Hey — saw your post about needing a Back-End Engineer for a financial trading system. With trading apps, the biggest pain point is usually making sure executions are fast and reliable under load, without breaking risk checks or compliance rules. Quick question before I suggest an approach: Are you already set on a specific stack (e.g. Node, Python, Java) and database, or is that still open as long as latency and throughput targets are hit? I’ve worked on trading and high-volume financial backends before, dealing with order routing, position tracking, and audit-safe logging. If you can share the full job description, current architecture (if any), or a short spec, I’ll review it and tell you what looks realistic and where the biggest risks are.

@MilchoMazganov

Hi, I can help with the backend side of the trading system. I’ve already built a few trading bots, and I’m currently using one of them myself, so I understand the nature of this work: reliability, clean execution logic, risk controls, API handling, logging, error recovery, and avoiding fragile code around live financial actions. On the backend, I can work with exchange/broker APIs, strategy execution services, order/position tracking, database design, authentication, dashboards/API endpoints, and monitoring. I’m also comfortable separating strategy logic from execution and keeping the system structured so it can be tested and extended safely. I’d first review the existing architecture or requirements, then confirm the safest implementation plan before touching live trading flows.