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I’m building a Python-powered web application focused on data processing—specifically stream data processing—and I need your help to get the first working version online. What I need • A server-side component in Python that accepts a live data stream, performs on-the-fly transformations (filtering, aggregation, enrichment, etc.), and publishes the processed results immediately. I’m comfortable with FastAPI, Flask, or Django Channels as long as the final code is clean and documented. • A lightweight browser client that connects over WebSocket (or comparable real-time transport), receives the processed events, and displays them—raw JSON is fine for now, but a minimal chart or table helps confirm everything is flowing. • Clear separation between ingestion, processing, and broadcasting layers so I can swap in production sources later (Kafka, MQTT, or another broker). • Containerisation with a Dockerfile plus a concise README so I can spin the whole stack up quickly. • Unit tests covering the main processing functions and a sample script that fires 100 events per second to demonstrate end-to-end latency below 200 ms. Deliverables 1. Python server code with real-time processing pipeline. 2. Simple HTML/JS client to visualise live output. 3. Dockerfile, README, and test suite. 4. Git repository hand-over. If you’ve built real-time data pipelines or WebSocket services in Python before, I’d love to see a quick note on your chosen framework and any similar projects.
Project ID: 40674006
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133 freelancers are bidding on average €485 EUR for this job

⭐⭐⭐⭐⭐ Build a Python Web App for Real-Time Stream Data Processing ❇️ Hi My Friend, I hope you are doing well. I've reviewed your project requirements and see you are looking for a Python-powered web application for data processing. You don’t need to look any further; Zohaib is here to help you! My team has successfully completed 50+ similar projects for real-time data processing. I will create a clean and efficient server-side component to handle live data streams, ensuring everything is well-documented. ➡️ Why Me? I can easily build your real-time data processing application as I have 5 years of experience in Python development, specializing in web applications, data processing, and real-time systems. My expertise includes FastAPI, Flask, and WebSocket programming. Not only this, I have a strong grip on Docker for containerization and unit testing, ensuring quality and efficiency in your project. ➡️ Let's have a quick chat to discuss your project in detail and let me show you some samples of my previous work. Looking forward to discussing this with you in chat. ➡️ Skills & Experience: ✅ Python Development ✅ FastAPI ✅ Flask ✅ WebSocket Services ✅ Real-Time Data Processing ✅ Docker ✅ Unit Testing ✅ Data Transformation ✅ API Development ✅ HTML/JS Client Development ✅ Clean Code Practices ✅ Documentation Waiting for your response! Best Regards, Zohaib
€350 EUR in 2 days
8.1
8.1

Hi, I can build a Python-powered web application focused on data processing. I will create a server-side component that accepts a live data stream, performs on-the-fly transformations, and publishes the processed results immediately. I will utilize FastAPI for its performance and ease of use, ensuring the final code is clean and well-documented. To handle the key technical risks, I will implement a clear separation between ingestion, processing, and broadcasting layers, allowing for easy swapping of production sources like Kafka or MQTT. I will also ensure that the WebSocket client is lightweight and capable of displaying processed events in real-time. For testing, I will develop unit tests covering the main processing functions and create a sample script to demonstrate end-to-end latency. I will provide a Dockerfile and a concise README to facilitate quick deployment. I have experience with real-time data pipelines and WebSocket services, and you can view my relevant projects in my portfolio: https://www.freelancer.com/u/techplusintl. Ready to start immediately!
€300 EUR in 10 days
7.8
7.8

For this first working version, I would use FastAPI with an asyncio-based pipeline: an ingestion layer accepting generated or external events, a processing layer for filtering, aggregation, and enrichment, and a broadcasting layer publishing results through WebSockets. This separation will make it straightforward to replace the demo source with Kafka, MQTT, or another broker later. I’ll provide a lightweight HTML/JavaScript client that connects to the WebSocket, renders incoming JSON, and includes a simple table so event flow is immediately visible. I’ll also add a Python load script producing 100 events per second, with latency measurement to verify the below-200 ms target under the demo workload. The project will include pytest coverage for the core transformations and pipeline behavior, clear error handling, a Dockerfile, and a concise README covering setup, configuration, testing, and running the full stack. My experience with Python/FastAPI services, real-time APIs, Docker, and full-stack applications allows me to keep the implementation compact while leaving a clean path to production sources. I’ll hand over everything in an organized Git repository. Should the generated 100 events per second use a simple JSON format, or do you already have a sample event structure? Muhammad Saad
€550 EUR in 3 days
7.5
7.5

Hi, I reviewed your need for a Python web stream processing app: accept a live stream, transform events on the fly, and broadcast results in real time to a browser client. I’ll implement a clean ingestion, processing, and broadcasting separation using FastAPI, WebSocket messaging, and JavaScript-based front-end rendering for raw JSON plus a minimal table/chart. I’ll structure the processing functions so they’re testable and easy to swap for Kafka or MQTT later. I’ll ensure clean, documented code, reliable low-latency behavior, and unit tests with a script that pushes 100 events/second. Let’s discuss here now.
€250 EUR in 30 days
7.4
7.4

Hitting sub-200ms latency while keeping ingestion, processing, and broadcast layers cleanly separated is the important part here; the code has to be more than “working” so you can later swap in Kafka or MQTT without rebuilding everything. I’d structure this as a small FastAPI-based service with a WebSocket broadcast layer, isolated processing modules, and a simple browser dashboard to verify the event flow in real time. I’ve worked on Python services where low-latency event handling, JSON payload transformation, and real-time delivery were the core requirements, including socket-driven dashboards and modular backends prepared for future broker integration. For this kind of first version, FastAPI is usually the cleanest fit because it keeps the async flow straightforward and makes the Docker/testing setup lighter. A small latency view or event counter can also be included in the browser client so validation is easier. - Do you already have a sample event schema, or should I define one for the demo stream? - Should the enrichment step call static lookup data only for now, or do you expect external API/database lookups in v1? - Do you want the 100 events/sec demo script built as an async Python producer?
€250 EUR in 7 days
7.1
7.1

With a skill set that covers everything from firmware development to IoT product engineering, I'm confident I can deliver exactly what you're looking for in this project. I have extensive experience with Python and have built real-time data pipelines and WebSocket services before using frameworks like FastAPI, Flask, and Django Channels. This means I'm comfortable utilizing any of these technologies to develop a server-side component for your web application that can efficiently process live data streams with on-the-fly transformations such as filtering, aggregation, enrichment, and more. Regarding the client-side aspect, my proficiency in HTML/JS will ensure that the lightweight browser client perfectly connects over WebSocket and effectively visualizes the processed events for you. Moreover, my expertise in full-stack development will enable me to maintain a clear separation between ingestion, processing, and broadcasting layers to make future integration with other production sources (Kafka, MQTT) seamless. Finally, my firm grasp on Docker ensures that I can containerize the complete stack quickly with a Dockerfile. Additionally, you can expect comprehensive documentation (a concise README) and an effective unit tests suite covering the main processing functions as well as a sample script generating 100 events per second for end-to-end latency evaluation below 200ms.
€500 EUR in 7 days
7.1
7.1

SURE---------------GOT the scope of work----------------Let’s build your real-time Python data processing pipeline with a clean, modular architecture that is ready to scale. I specialize in FastAPI with WebSocket support, stream processing, and containerized deployments, delivering low-latency, production-ready systems. Proposed approach: Server: FastAPI + WebSocket for ingestion, processing, and broadcasting, with clear separation between layers. Client: Lightweight HTML/JS page to display live events in JSON and a simple chart or table. Processing: Filtering, aggregation, and enrichment functions with unit tests and a sample script generating 100 events per second. Deployment: Dockerfile, README, and Git repository for easy setup and handover. Relevant experience: Built real-time WebSocket services for IoT and financial data pipelines. Designed modular stream processing systems with sub-200ms latency. Delivered containerized Python applications with full test coverage and documentation. I am ready to start immediately and deliver a working version quickly.
€600 EUR in 7 days
7.1
7.1

Hi, I can help you with "Python Web Stream Processing" as per your given set of instructions. Please get in touch to discuss more in detail and start with the initial discusssion. I usually work in small milestones, keep the code organized, and provide regular updates so changes are easy to review. Can you share a few more details? I'll suggest the best implementation and an accurate timeline. ⭐ 5.0/5 from a recent client: "A more professional version: “Excellent work! The job was completed within the committed timeline. Great quality, professionalism, and timely delivery. Highly appreciated and recommended.”" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
€563 EUR in 10 days
6.9
6.9

Your project requires an efficient server-side component in Python that can handle live data streams for immediate processing and visualization. I would build this with FastAPI for its speed and smooth WebSocket integration, ensuring a clear separation of ingestion, processing, and broadcasting layers to accommodate future scalability. This solution will utilize Docker for easy deployment and include a lightweight HTML/JS client for visualizing processed data in real time. My expertise with Python web frameworks, along with a focus on clean documentation and unit testing, will ensure a reliable outcome. I have a 4.9-star rating across 200 reviews and have completed 220 projects. What specific transformations do you envision for the live data stream?
€600 EUR in 14 days
6.9
6.9

Hi there, I understand you need a Python-based real-time stream processing application where live events are ingested, transformed on the fly, and immediately pushed to a browser client over WebSocket, with the architecture kept modular for future Kafka, MQTT or other production sources. I’m confident I can build the first working version with clean separation between ingestion, processing and broadcasting. My approach is to first define the event schema, processing rules and real-time data flow. Next, I’ll build the Python backend using FastAPI with WebSockets, separating ingestion, transformation, aggregation/enrichment and broadcasting into maintainable components. Then, I’ll create a lightweight HTML/JavaScript client to display the processed events through a table or simple visualization. Finally, I’ll containerize the complete stack with Docker, add unit tests and run a 100-events-per-second load test to validate the required sub-200 ms end-to-end latency. I’ll also provide the Dockerfile, README, test suite, sample event generator and Git repository, with the ingestion layer structured so a future Kafka/MQTT integration can be added without redesigning the processing pipeline. Will the initial live stream be generated by the provided test script, or do you already have a specific data source/protocol that the first version needs to consume? I’m ready to start immediately. Warm Regards, Aneesa.
€250 EUR in 2 days
6.4
6.4

Hi there, I see you're looking for a Python-based web application for real-time stream processing. I have extensive experience with building real-time data pipelines using frameworks like FastAPI and Flask, alongside a solid understanding of Docker for containerization. I can structure the server component to ensure clean separation of ingestion and processing, and provide a lightweight client for displaying data via WebSockets. My goal will be to create a robust solution that meets your requirements for unit testing and documentation. Your satisfaction is my priority and I guarantee that I will deliver you a high-quality result. Regards, Ali
€250 EUR in 14 days
6.4
6.4

I am MOHD SADAB, a seasoned developer specializing in Django, Docker and Python among others, and I am the perfect fit for your Python Web Stream Processing project. My team and I have extensive hands-on experience with building real-time data pipelines and WebSocket services. Drawing from our range of skills, we are well-versed with implementing Odoo ERP, designing custom IoT hardware and have a comprehensive understanding of MQTT-connected sensor networks. This offers an exceptional advantage when it comes to your project requirements as it seamlessly aligns with weaving AI into your workflows, reading live sensor data, and acting promptly based on the information received. Our strength in deploying on AWS, GCP, and Azure ensures that all your server-side components are correctly assembled for efficient service delivery. The system's core is agentic AI which initiates autonomous agents; exactly the kind of intelligent systems framework you need. Additionally, our capability in creating LLM integrations and predictive ML models resonates precisely with streamlining your data processing objectives to meet real-time demands.
€500 EUR in 7 days
6.5
6.5

Your pipeline will bottleneck if you process 100 events per second in a single-threaded loop without async handling—WebSocket broadcasts will queue and latency will spike past 500ms under load. You also need backpressure controls so slow clients don't block the entire stream. Quick questions - are you planning to run this on a single container or scale horizontally behind a load balancer? And do you need exactly-once delivery guarantees or is at-least-once acceptable for your use case? Here's the architectural approach: - FASTAPI + WEBSOCKETS: Async event loop with Redis pub/sub to decouple ingestion from broadcast, keeping per-client latency under 100ms even at 500 events/sec. - DOCKER COMPOSE: Multi-stage build with separate services for the API, Redis, and a load generator that fires configurable event rates to validate throughput. - PYTEST + LOCUST: Unit tests for transformation logic plus load tests proving sub-200ms end-to-end latency at your target rate with 10 concurrent WebSocket clients. I've built similar real-time pipelines for 2 fintech clients processing market data feeds at 2K events/sec with sub-50ms p99 latency. Let's schedule a 15-minute call to align on your production broker requirements before I start the build.
€450 EUR in 21 days
7.2
7.2

Stream processing where the browser sees results immediately is a backpressure problem: if the client is slower than the producer, something has to give — buffer, drop, or slow the source. Deciding that upfront prevents a rewrite later. - FastAPI server with an async pipeline: ingest, transform (filter/aggregate/enrich), publish — with the flow rate handled explicitly - WebSocket endpoint pushing processed events to the browser, with reconnect and replay of the last N events so a refresh does not lose context - Lightweight JS client rendering the live stream, documented and clean - Dockerised, so the first version goes online without a bespoke server setup Proof: I run Python data pipelines and containerised services in production for industrial clients, including live dashboards fed by continuously updating sources. Where does the stream come from (sensor, API, queue?), and roughly what event rate? That decides whether we need a broker between ingest and processing. Ready to start. Martin
€389 EUR in 5 days
6.6
6.6

Hello!⚡ The requirement that shapes the whole architecture is your own instruction: clean separation between ingestion, processing and broadcasting so you can swap in Kafka or MQTT later. Most first versions weld those together — the WebSocket handler does the filtering inline — and then swapping the source means a rewrite. So I'd build three independent layers from the start, connected by internal queues: ingestion just receives and normalises, processing transforms, broadcasting pushes to clients. Later, replacing the ingestion layer with a Kafka consumer touches one module and nothing downstream changes. That separation is the actual value of a "first version" done right. For the sub-200ms latency at 100 events/second, the trap is doing the processing on the event loop and blocking it — so the transforms run without stalling the async broadcast, and I'd verify the latency under the 100/s load rather than assume it. FastAPI with its native WebSocket support fits best here — one async framework for ingestion and broadcast, clean and fast. Deliverables: the three-layer Python pipeline, a minimal HTML/JS client showing live events as a table and small chart, Dockerfile, README, unit tests on the processing functions, and the 100/s load script proving end-to-end latency. Git handover. Best.
€500 EUR in 7 days
6.3
6.3

Hello, I have carefully read your project description and understand that you are looking for a skilled professional to build a Python-based real-time stream processing application with WebSocket communication, live transformations, and a lightweight browser interface. To approach your project I will develop a clean Python backend using FastAPI and WebSockets, separating ingestion, processing, and broadcasting so future Kafka, MQTT, or other streaming sources can be connected without restructuring the core system. I’ll implement filtering, aggregation, and enrichment logic, then create a lightweight HTML/JavaScript client showing incoming events through JSON, tables, or a simple chart. I’ll also provide Docker configuration, documentation, unit tests, and a 100-events-per-second load script to verify the required sub-200ms end-to-end latency. In terms of relevant experience, I have experience developing Python APIs, WebSocket-based applications, real-time data processing workflows, Dockerised services, automated testing, and scalable backend architectures. I focus on clean, modular code so the first working version can evolve smoothly into a production-grade streaming platform. I’d love to discuss your expected event structure, transformation rules, and preferred deployment environment so we can get the first version online quickly. Best Regards, Rabia Shaikh.
€250 EUR in 3 days
6.0
6.0

I can develop a Python server that processes live data streams in real-time using FastAPI or Flask. My first step will be to set up the server-side component with clear separation between ingestion, processing, and broadcasting layers. Based in Toronto, I work quickly and am always available to discuss progress or clarify requirements. Looking forward to helping you build this application.
€250 EUR in 7 days
6.1
6.1

Hi there, Building a robust real-time data processing application can be challenging, especially when managing the performance and scalability of live data streams. With my experience in creating similar systems, I'll ensure your application efficiently processes and displays data, maintaining low latency and high reliability. Here are my questions: What kind of data transformations are you most keen on prioritizing initially? Are there any specific production sources you plan on integrating later? Let's discuss your project now!
€750 EUR in 15 days
6.0
6.0

Hello, Your Python web stream processing project aligns perfectly with my expertise in Python, Django, FastAPI, and JavaScript. With over a decade of experience in web development and software architecture, I have successfully delivered similar real-time data processing solutions. I propose to create a robust server-side component in Python utilizing FastAPI for efficient data stream processing. The lightweight browser client will connect over WebSocket to display the processed events, ensuring seamless communication. By implementing clear separation between the layers and containerizing the solution with Docker, scalability and flexibility are guaranteed. To add value, I recommend incorporating a minimal chart visualization for quick data confirmation. With a keen eye for detail and a client-centric approach, I am committed to delivering high-quality results promptly. Let's discuss how we can bring your vision to life.
€500 EUR in 7 days
6.1
6.1

Hello, The important design decision is keeping ingestion, transformation, and broadcasting independent so the prototype can later accept Kafka or MQTT without rewriting the processing layer. FastAPI with WebSockets is a sensible fit for the first version, with an async processing pipeline and explicit backpressure/error handling rather than coupling stream intake directly to browser connections. The 100 events/second test should measure end-to-end latency under sustained load, not just demonstrate that individual messages arrive quickly. I would also make the processing functions independently testable before wiring them into the real-time transport, then containerize the complete stack for repeatable deployment. Should the 200 ms target include browser rendering time, or only ingestion through server-side processing to WebSocket delivery? Have a nice day
€450 EUR in 14 days
5.9
5.9

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