Prediction Markets Engineer (Backend/API + Market Mechanics)

@AwaisChaudhry

Hello, I’m Muhammad Awais, and I will design a robust backend and market mechanics for your prediction markets platform. I will focus on correctness under load, clean data models, and reliable real-time updates. My approach is to build a clear data model for markets, outcomes, orders, trades, positions, and balances in Postgres, with a real-time feed via WebSockets, idempotent order submission, and a state machine for settlement. I’ll ensure matching/clearing handles partial fills and race conditions, and I’ll implement comprehensive audit logs for reconciliation and analytics-friendly event history. Key questions I’d like to clarify: - Preferred stack and deployment approach (e.g., Rust + Postgres, hosting, CI/CD) - Liquidity model: AMM-style curve or order-book mechanism, or a hybrid - Oracle/dispute input and final payout rules, including dispute windows - Auditability and testing strategy, especially around race conditions and partial fills What is your preferred stack and deployment approach, and do you want AMM vs order-book liquidity with a clear oracle/dispute policy? Best regards,

@irsolutions

With over a decade of experience in web and mobile development, specializing in prediction markets, exchanges, and trading systems, I understand that your project requires expertise in backend/API development and market mechanics. In my past projects, I have successfully designed and built core components for prediction markets platforms, ensuring correctness, consistency, and clean data models. My experience aligns perfectly with your requirements, from implementing YES/NO outcome tokens to resolving disputes and final payouts. I have a proven track record in backend/API engineering, real-time systems, and database design, making me well-equipped to tackle the "hard parts" of pricing consistency, double-submit prevention, and clean data schema. Let's discuss how I can bring my skills and experience to your prediction markets platform. Reach out to me to further explore how I can contribute to the success of your project. Looking forward to working together.

@MashoodurRehman1

I am a seasoned backend engineer with extensive experience in developing robust and scalable systems for financial and trading platforms. My background in working with exchanges and prediction markets aligns perfectly with your project requirements. I have a strong foundation in building highly concurrent, real-time systems using a variety of tools and technologies, ensuring consistency and availability even under heavy load. My expertise includes designing comprehensive data models and architectures that support complex market mechanics, as well as creating efficient, reliable APIs for market operations. My experience with PostgreSQL and real-time communication protocols like WebSockets will ensure efficient handling of real-time market updates and transactions. I have implemented idempotent operations and robust synchronization mechanisms to handle issues such as double-submit prevention and partial fills, crucial for maintaining integrity in trading systems. I am interested in discussing the project further and understanding your specific needs. Could you please provide more details on your preferred engagement model and any other key requirements? Best regards.

@melikatfz

Hi there, regarding your project, I've noticed that many overlook the importance of optimizing database queries for speed. My approach ensures that every query runs efficiently, delivering fast results even under heavy loads. This prevents bottlenecks that could slow down the entire system. In a recent project, I revamped an e-commerce site's backend, resulting in a 40% decrease in page load times, which greatly enhanced user experience. I include 30 days of post-deployment bug-fixing. How many concurrent users do you anticipate handling at peak times? Let's discuss how I can help.

@ZohaibRoy

⭐⭐⭐⭐⭐ Build a Reliable Prediction Markets Platform with Expert Engineering ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and see you're looking for a freelance engineer to design and build core components of your prediction markets platform. Look no further; Zohaib is here to help you! My team has successfully completed over 50 similar projects in this field. I will focus on creating robust market mechanics, ensuring data consistency, and developing a reliable backend. ➡️ Why Me? I can easily do your prediction markets project as I have 5 years of experience in backend development, API design, and real-time systems. My expertise includes database design, market mechanics, and ensuring reliability under load. I also have a strong grip on technologies like WebSockets and PostgreSQL, which are essential for your project. ➡️ Let's have a quick chat to discuss your project in detail. I would love to show you samples of my previous work and how I can add value to your project. Looking forward to chatting with you! ➡️ Skills & Experience: ✅ Backend Development ✅ API Design ✅ Real-Time Systems ✅ Database Design ✅ Market Mechanics ✅ Data Modeling ✅ Concurrent Processing ✅ Reliability Engineering ✅ Event-Driven Architecture ✅ WebSockets ✅ Testing and Debugging ✅ Analytics Integration Waiting for your response! Best Regards, Zohaib

@ixorawebmob

Hello, I’ve gone through your project details, and this is something I can definitely help you with. With 10+ years of experience in backend and API development, particularly in systems that prioritize correctness and performance, I’m well-equipped to assist in designing and building core components for your prediction markets platform. My focus on clean data models will enhance both UI and analytics, ensuring your system is robust and efficient under load. I have a strong background in building trading systems and real-time applications utilizing technologies that support WebSockets and pub/sub strategies, alongside effective database design with PostgreSQL. My experience with order books, liquidity management, and market mechanics aligns well with your requirements. Here is my portfolio: https://www.freelancer.in/u/ixorawebmob I’m very interested in your project and would love to clarify a few details to ensure the best approach:Could you clarify which specific outcomes or features you prioritize in the initial phase of development? Let’s discuss over chat! Regards, Arpit Jaiswal

@tangramua

Dear ,   We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time.   We are 25 years in this business and our technical specialists have strong experience in Analytics, PostgreSQL, Backend Development, Rust, Data Architecture, Database Design, API Development, Market Analysis, Software Engineering, Performance Tuning and other technologies relevant to your project.   Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews.   Please contact us via Freelancer Chat to discuss your project in details.    Best regards, Sales department Tangram Canada Inc.     

@Kashifscode

Hello, Being the Prediction Market Engineer with a strong backend/API engineering background, I have the necessary experience and skills to make a significant contribution to your project. Throughout my many years of work on exchanges, prediction markets, and various trading systems, I've gained extensive knowledge of building clean and data-driven models that are essential for any prediction platform. Regarding mechanics, I'm well-versed in designing market mechanisms, and transforming YES/NO outcome tokens into implied probabilities that align with the prices. Liquidity management through order books and AMM-style curves is another area in which I excel. I understand the intricacies of the entire market lifecycle - from open to trading to resolution to settlement - allowing me to effectively handle important aspects like oracle inputs, dispute windows and more. On top of my backend/API expertise, I have a strong understanding of real-time systems. Whether it's implementing efficient pricing updates over WebSockets or handling idempotence for order submissions, you can rest assured that your system will be reliable under high load with minimal race conditions or race conditions at all. And when it come Thanks!

@arvinjay007

Hi there, I see you're building a prediction markets platform where correctness, load consistency, and robust market mechanics are critical. Over the past 5 years, I’ve engineered trading and matching systems with real-time pricing, idempotent order flow, and safe concurrency, exactly the architecture challenges you’re tackling. To deliver this, I’ll design clean schemas for markets, orders, trades, positions, and balances; implement order-book or AMM pricing with safe matching and partial fill logic; build reliable APIs with idempotency keys and replay protection; and ensure real-time feeds via WebSockets or pub/sub. I’ll also structure a settlement state machine with complete auditability and event history suitable for analytics. Best regards, Arvin Jay

@Apps1m1ty

Hello, For a prediction market platform, the critical challenge is maintaining pricing consistency and transactional integrity under concurrent trading activity. I would structure the backend around PostgreSQL with strict transactional guarantees and a service layer that manages markets, orders, trades, positions, and balances through clearly defined state transitions. The trading engine can support either an order-book matcher or an AMM-style pricing curve, with safeguards for idempotent order submission, replay protection, and partial-fill handling. Real-time updates would be delivered through WebSocket streams backed by a pub/sub layer, ensuring UI clients receive deterministic market updates while the core system maintains server-side truth. Settlement would follow a state-machine workflow (open → trading → resolution → settlement) with a full event log for auditability and analytics. Best regards, MS

@TechizeBuilder

Hi, I came across your project "Prediction Markets Engineer (Backend/API + Market Mechanics)" and I'm confident I can help you with it. About Me: I'm a agency owner with over 8+ years of experience in PostgreSQL, API Development, Backend Development. , and I understand exactly what’s needed to deliver high-quality results on time. Why Choose Me? - ✅ Expertise in required Technologies and 1 year post deployment free support - ✅ On-time delivery and excellent communication - ✅ 100% satisfaction guarantee Let’s discuss your project in more detail. I’m available to start immediately and would love to hear more about your goals. Looking forward to working with you! Best regards, Deepak

@rohaansheikh90

Hello, I can do the work as I have recently completed a similar project involving the development of prediction markets mechanics and backend/API engineering. I am confident in my ability to deliver high-quality results for your platform. Please start the chat as I have a few questions and would like to discuss the project further. Thanks, Rohaan Sheikh

@PrateekP3003

As an experienced full-stack developer specializing in the design and construction of high-performance applications, I believe I possess the skills necessary to help bring your ambitious prediction markets platform to life. My expertise in backend development, particularly with PostgreSQL, aligns perfectly with your requirements for correct and consistent data models that support both UI and analytics. Combining this with my solid understanding of backend + API development, including real-time systems like WebSockets, I'm confident in my ability to deliver on your project demands. But what sets me apart from the rest is my experience with complex marketplaces. I have previously worked on exchanges, trading systems, and similar platforms that required rigorous transactional design and handling race conditions - exactly what your project entails. Over the years, I’ve honed my skills in ensuring pricing consistency under load, dealing with matching/clearing edge cases as well as developing audit-friendly event/history designs. In terms of deliverables, you can expect not just a solution that ticks off all the checkboxes but also code that is thoroughly tested for race conditions and partial fills. This meticulous approach, paired with my familiarity with AMM-style curves, settlement models, and database design will ensure a robust system that not only delivers the full functionalities you need but also accounts for potential disputes or resilience issues along the way.