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I need an experienced Betfair Exchange API developer to build a small but rock-solid program that automates lay betting on horse racing. The core of the job is to link directly to Betfair’s API, pull live market data, and use that feed to place lay bets without manual input while continuously recording performance. Key features I must see working: • Real-time odds tracking on all relevant UK and international horse-racing markets • Automated bet placement for lay bets with adjustable stake and liability parameters • Ongoing profit-and-loss tracking that can be exported to CSV for later analysis I already have the staking logic and race-selection rules drafted, so your focus will be integration, data handling, error management, and a clear, testable user interface (CLI or lightweight GUI—whichever you build fastest and is easiest to maintain). Efficient caching, proper authentication flow, and safe handling of in-play market changes are essential acceptance criteria. If you have previously passed Betfair’s vendor assessment or have functioning demo code, that will speed things up. Let me know your preferred language, tooling, and how soon you can demo real-time odds streaming plus a sandbox lay bet.
Project ID: 40611317
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143 freelancers are bidding on average £2,061 GBP for this job

Hi, I noticed you're looking for a way to automate lay bets on horse racing, especially catching the live odds updates and making quick bets. I love working with APIs that handle real-time data, like in the SportsRepeat and Freetemp-booking apps I worked on before. I'll make sure your system pulls fresh odds, places bets based on your rules, and keeps track of bets and profits easily. Did you think about handling market errors or sudden changes in odds during bets? Let’s discuss a plan and build something impressive together. Regards, Nick
£1,500 GBP in 9 days
9.4
9.4

Hi — Elias here from Miami. I understand you're looking to develop a Betfair API Lay Betting Tool aimed at creating a reliable solution for real-time betting data and trade execution. A common issue in systems like this is managing the complexities of API integration while ensuring data integrity and speed. What usually matters most is stability and the ability to scale as user demand grows. The tricky part often revolves around maintaining a clean architecture that supports future enhancements without major rework. My approach would involve building a modular system that emphasizes clear separation of concerns. This would allow for easier debugging and expansion. I would use PHP for the backend, ensuring robust error handling and logging mechanisms to catch issues early. I've worked on similar projects integrating APIs for financial applications, giving me insight into the nuances of data handling and automation. A few questions to better understand the scope: Q1 – What specific user roles and permissions do you envision for this tool? Q2 – Are there particular performance metrics or thresholds you expect to meet? Q3 – How do you plan to handle data redundancy or recovery in case of a failure? Happy to discuss the details and suggest the best technical approach. Looking forward to hearing from you.
£2,000 GBP in 10 days
8.5
8.5

Hello, As an experienced API developer with a specific focus on Betfair Exchange, I'm confident that I can deliver the powerful, efficient, and user-friendly program you're seeking for your lay betting needs. My expertise in C# Programming and PHP, along with my proficiency in managing complex data systems and error handling, make me the perfect fit for this project. At Our Software, we emphasize the importance of building rock-solid and versatile applications that can meet various stakeholder needs. We've successfully developed numerous tools that require real-time data streaming and dynamic decision-making just like your envisioned betting tool. This project will benefit from our strong knowledge of web design & development, Content Management Systems, and SEO services as it involves creating a user-friendly interface with efficient caching and fail-safe handling of in-play market changes. Our proven track record in bridging APIs and extracting accurate data, coupled with our past success in vendor assessments, guarantees that we'll exceed your expectations. We're committed to providing the "WOW" factor you've mentioned through prompt communication, meticulous attention to detail, and superb customer service throughout our journey together. Let's turn your dream of an automated betting tool into a reality that will not only enhance your profit but also simplify your processes. Thanks!
£1,600 GBP in 12 days
8.6
8.6

As an avid developer experienced in working with API integrations, I'm confident I can deliver the automated bet placement tool you're seeking. Even though my primary expertise lies in C# and PHP, I believe in being adaptable and learning quickly. I've worked with numerous APIs in the past, gaining the ability to build strong connections that can effectively pull real-time data, a skill crucial for your project. Apart from being an exceptional coder, I'm well-versed in racing terminology and patterns, which allows me to better understand and meet your specific needs for this horse racing-focused project. Additionally, my competency in developing tools that handle large amounts of dynamic data while maintaining quick response times aligns perfectly with the demands of your program. Lastly, I consider creating user-friendly interfaces integral to any tool's effectiveness. Whether you choose CLI or GUI, rest assured I'll develop it for you in a manner that's both easy-to-use and maintainable. With a firm commitment to efficient caching, proper authentication flow, and data safety during market changes, I’m dedicated to producing a program that not only meets your current demands but is also future-proofed. To give you an early glimpse - within days I can showcase real-time odds streaming as well as lay bet functionalities of the project in sandbox mode before swiftly transitioning to its full-scale development.
£2,250 GBP in 7 days
8.1
8.1

Hello, I understand you need a dedicated tool to automate your lay betting strategy. The system will maintain a persistent connection to the Betfair API, stream real-time horse racing odds, and apply your specific race selection and staking rules to programmatically place lay bets. It will manage the full bet lifecycle from placement to settlement, logging all performance data for simple CSV export. Technical approach: I recommend a Python backend for its robustness in data processing and API communication. We'll use the Betfair API-NG for both the streaming feed and betting execution. A lightweight command-line interface (CLI) is the fastest and most stable option. For tracking, a local SQLite database is perfect for managing P&L data without overhead. Core modules: Authentication and session manager; Real-time market data streamer; Betting engine to host your logic; Order execution and management module; P&L tracker with CSV export. Relevant systems: Our Fanhut social platform was built to handle real-time WebSocket data feeds for live sporting events, which is architecturally very similar to processing Betfair's high-frequency odds streams. My first step would be to build a small prototype that connects, authenticates, streams live odds, and places a sandbox bet. I could demo this within a few days. We would then integrate your rules and build out the robust P&L and error-handling components. Regards, Rohit
£1,500 GBP in 20 days
8.0
8.0

Hi! This is something we can handle without issues. A couple of things before I scope it properly: you mention the staking logic and race-selection rules are already drafted — are those in a document you'd share, or do you expect us to translate them into code from scratch? That changes the shape of the work quite a bit. Also, do you have a Betfair vendor account already, or would we need to factor that approval process into the timeline? On our end, we'd build this in Python — clean, testable, easy to maintain — using Betfair's Streaming API for live odds and the Exchange API for bet placement. For the interface, a lightweight CLI with structured logging is the fastest path to something solid; a GUI is doable but adds time without adding much value at this stage. Happy to show how we'd structure the auth flow and caching layer once we've aligned on the staking logic handoff. Gustavo & the DoTheCode team
£2,600 GBP in 7 days
7.8
7.8

Hi I am a software engineer with over 16 years of experience. I have extensive experience building reliable API-driven automation, real-time data services, trading workflows, and testable desktop/CLI tools. I can develop your Betfair lay-betting tool in Python, using Betfair’s streaming and betting APIs for responsive odds monitoring, authenticated order placement, adjustable stake/liability controls, and accurate P&L reporting to CSV. The application will account for suspensions, price movement, partial matches, reconnects, rate limits, and in-play transitions, with clear logs and safeguards to prevent duplicate or unintended bets. I would first connect the market stream and demonstrate live horse-racing odds, then validate bet placement safely before integrating your staking and race-selection rules. A lightweight GUI can be provided without making the system difficult to maintain. Do you already have an approved Betfair application key and certificate-based API access, and is the staking logic documented with sample scenarios? I can provide an initial real-time streaming demonstration within 4 days. Please contact me to discuss details.
£2,500 GBP in 18 days
7.5
7.5

Since 2015 I have been working in C/C++/C# programming and 10(ten) years of experience in C/C++/C# programming. Windows Desktop Application, Console Application, Image Processing and have knowledge in Driver Development in C. Expert in data structure building and Object Oriented Programming (OOP). Have a great experience in C++ MFC and C++ WinUI 3 for GUI design and development. Also expert in C/C++ GPU CUDA programming. If you want a good delivery of the project, then send me a message, please.
£3,000 GBP in 15 days
7.4
7.4

Hello!, I am a Florida-based senior software engineer(frontend, backend, ecommerce, etc) with 15 years of experience in C#, PHP, C++, API development, automation, software architecture, and testing. I read your Betfair API Lay Betting Tool description carefully, and I understand you need something small but rock-solid, not a quick script that fails in live exchange conditions. I’ve built trading and data automation systems where reliability, clean error handling, and precise execution matter most. For this tool, I’d handle it in phases: confirm the exact lay-betting rules and workflow, design the Betfair API integration and state handling, build the core logic with logging/retries/safeguards, then test edge cases so it behaves predictably. I’m very detail-focused on projects like this because the small things usually decide whether the tool is genuinely useful or frustrating. If needed, I can also keep the structure flexible so future features can be added without a rewrite. Could you please clarify the following questions to help me better understand the project? 1) Should the tool place lays automatically, or only calculate and prepare them for manual confirmation? 2) Do you want this built in C#, PHP, or another desktop/server setup? 3) Are there specific markets, staking rules, or stop-loss conditions that must be enforced from day one? I can help turn this into a reliable, practical tool. -James
£2,300 GBP in 11 days
7.1
7.1

The biggest failure point here isn't placing lay bets—it's keeping the betting logic synchronized with Betfair's live market state when odds move, markets suspend, or races go in-play. I'd build the API integration around that first, with reliable authentication, efficient market data handling, and safeguards so orders are only submitted against valid market conditions. Since you've already defined the staking logic and race-selection rules, the focus stays on connecting those rules to live data, recording every action and P&L cleanly, and producing CSV exports for analysis. I'd also keep the interface intentionally simple so it's easy to test and maintain, whether that's a CLI or lightweight GUI. One question that affects the implementation: do you want to use Betfair's streaming API for live odds, or should the application poll the Exchange API?
£2,000 GBP in 10 days
7.2
7.2

Hi there, I am Efanntyo, and I am excited to help you develop a Betfair API Lay Betting Tool. Your project requirements align perfectly with my skills and experience in API development and software architecture, particularly in the realm of automated betting solutions. I understand the necessity of real-time odds tracking and automated lay betting with flexible stake and liability settings. My experience with Betfair's API ensures seamless integration and efficient data handling. I prioritize error management and will build a user-friendly interface (CLI or GUI) based on your preference, focusing on quick implementation and ease of maintenance. Having previously worked on similar projects, I am adept at implementing efficient caching and ensuring secure authentication flows. I also understand the critical nature of handling in-play market changes and will incorporate this into the solution for robust performance monitoring, complete with CSV export capabilities. I am well-versed in PHP and C#, and with your approval, I can quickly demonstrate real-time odds streaming and sandbox lay betting. My previous projects have passed Betfair’s vendor assessment, attesting to my competence in this field. I am looking forward to bringing your vision to life with precision and reliability. Best Regards, Efanntyo
£2,250 GBP in 20 days
6.9
6.9

Hello, I've carefully reviewed your project and understand that the trading strategy is already defined—the focus is on building a stable, low-latency Betfair Exchange API integration that reliably streams live horse-racing markets, executes automated lay bets according to your rules, and records detailed trading performance without manual intervention. I have experience building API-driven automation systems and would recommend Python for this project due to its mature Betfair ecosystem (betfairlightweight), excellent performance for real-time market streaming, robust logging, and straightforward deployment. The application will securely authenticate with the Betfair Exchange API, subscribe to live market updates, continuously monitor UK and international horse-racing markets, execute lay bets with configurable stake and liability settings, handle market suspensions and in-play transitions safely, and maintain comprehensive trade logs with real-time P&L tracking and CSV export. I'll also implement proper retry logic, caching, exception handling, and detailed audit logging to ensure reliable operation during live trading. PLEASE INITIATE CHAT SO I CAN SHARE MY PREVIOUS WORK. Best Regards, Nikita Gupta
£2,200 GBP in 10 days
6.9
6.9

Hello, I have experience developing **real-time trading and exchange API integrations**, with a focus on reliable automation, low-latency data processing, and robust error handling. I can build a Betfair Exchange application that streams live horse racing markets, executes automated lay bets based on your rules, and tracks performance with detailed CSV reporting. The solution will include secure authentication, real-time odds streaming, configurable stake/liability settings, caching, in-play safeguards, comprehensive logging, and a clean CLI or lightweight GUI. The code will be modular and well documented, making future strategy updates straightforward. I can deliver a self-contained application with full source code and demonstrate live odds streaming together with sandbox paper/live testing before deployment.
£2,950 GBP in 7 days
6.8
6.8

As a seasoned developer with over a decade of work experience, specializing in Automation and Software Architecture, I am confident I possess the necessary skills and experience to deliver for your project. My wide-ranging expertise, especially in Crafting Trading Bots and Web Scraping for Smart Data Extraction will prove instrumental in building the robust program you're looking for with foolproof integration to Betfair's API. Additionally, my proficiency in various tools and languages such as Python for Algo Development, will serve us well. Over time, I have amassed significant proficiency at efficiently managing data which would come handy in ensuring effective real-time odds tracking on all horse racing markets as needed. My prior projects have been characterized by clean, optimized code which is essential for robust automated betting. More importantly, since you've already laid out your staking logic and race-selection rules, my major focus- data handling, error management, safe functioning of in-play market changes; aligns perfectly with your needs.
£2,000 GBP in 3 days
6.7
6.7

With my comprehensive experience in API development and trading, I am ideally positioned to deliver on your request for a robust Betfair Exchange API-based horse-racing betting tool. Having worked on similar projects in the past, I understand what it takes to build a reliable, high-performing tool that seamlessly interacts with Betfair's API. This includes real-time odds tracking, automated bet placement, and intuitive profit-and-loss tracking, all features you prioritize.
£1,500 GBP in 10 days
7.0
7.0

Hi. To build this, I’ll connect directly to Betfair Exchange API, stream live horse-racing markets, and wire your staking rules into an automated lay-betting flow with safe liability control. I’ll keep the system lean with a testable CLI or lightweight GUI, plus CSV export for PnL, audit logs, and retry logic around authentication and market-state changes. I’ll also add caching and guardrails so in-play updates do not trigger bad fills or stale decisions. As a Senior Backend Engineer, I have mastered API integration, real-time data handling, Python, and error-resilient automation, and have strong experience in trading tools, betting systems, and data-driven dashboards. I am sure I can deliver high-quality results within two weeks for a clean demo and production-ready foundation. Let’s get in touch and discuss more. Thanks.
£1,750 GBP in 14 days
5.8
5.8

I can help you build this automated lay betting tool. I recommend using C# (.NET) for the build. Its native asynchronous capabilities are highly efficient for handling continuous data streams without locking the execution thread. To achieve rock-solid real-time odds tracking, the architecture should utilize Betfair’s Exchange Stream API (ESA) rather than traditional REST API polling. This pushes zero-latency market updates via a persistent socket connection, eliminating rate-limit penalties and ensuring you react to price movements instantly. For error management and in-play safety, the program will continuously monitor the `marketStatus` flag. If a race suspends, transitions in-play, or experiences a runner withdrawal, the system will immediately halt new placements and kill unmatched bets to protect your liability parameters. Authentication will be handled via a certificate-based non-interactive login to ensure the bot can run unattended securely. I will structure this as a lightweight CLI application to keep system overhead as low as possible. Your custom staking logic will sit decoupled from the API layer, and all P&L tracking will be appended asynchronously to a CSV, ensuring disk write speeds never bottleneck your live market feed.
£2,000 GBP in 7 days
6.0
6.0

Thank you for the opportunity to develop your Betfair API Lay Betting Tool! I’m excited about the prospect of automating lay betting for horse racing and enhancing your betting strategy. Your focus on real-time odds tracking and automated bets aligns perfectly with my expertise. With experience in integrating APIs, I can ensure seamless data handling and error management, making your program robust. Here's what I propose: - Real-time odds tracking across UK and international markets. - Automated bet placement featuring adjustable parameters for stakes and liabilities. - Performance tracking with CSV exports to keep your analysis efficient. Rest assured, I’ll prioritize user interface design, providing either a CLI or a lightweight GUI to meet your preferences while ensuring the system is easy to maintain. I'm keen to leverage efficient caching and proper authentication flows while adhering to your acceptance criteria. Let's open a dialogue about your preferred language and tooling so we can kick things off. I'm eager to show you how quickly I can demo real-time odds streaming and execute a sandbox lay bet! What’s your favorite horse name to place a lay bet on—let’s make it a lucky race! Looking forward to your response! Best, Talha
£1,500 GBP in 14 days
5.8
5.8

For a rock-solid lay betting tool, I would separate live market streaming, rule evaluation, and order execution, with an audit trail for every price update, decision, and submitted order. My preferred stack is Python with Betfair’s Exchange Stream API for odds, REST endpoints for account and betting actions, PostgreSQL or SQLite for state, and a lightweight CLI first. I would implement UK and international market filtering, reconnect and resubscribe handling, session keep-alive, idempotent order controls, stale-price checks, in-play protection, adjustable stake and liability limits, and CSV P&L export. This keeps the system maintainable while reducing duplicate, rejected, or incorrectly priced bets. I handle API-heavy products end to end, including authentication, streaming data, background workers, logging, reporting, and deployment. The build would include simulation mode and acceptance tests for market suspension, partial matching, cancellation, and connection loss. A relevant example is Kingmovers, where I implemented WebSocket events, third-party integrations, webhook processing, notifications, and role-based analytics in a production application. With API credentials, I can demo real-time odds streaming within 3 to 5 working days, followed by a minimum-stake live lay test with your approval.
£2,250 GBP in 7 days
5.9
5.9

Dear Client, I read "Betfair API Lay Betting Tool" carefully and understand you need a sports betting platform that handles live odds and payouts without a hitch. My hands-on experience with PHP, API Development aligns directly with what you need. I've built betting platforms with live odds feeds, bet slips, wallet and settlement systems, and admin risk controls — built for accuracy under real-time load, with responsible-gambling safeguards in place. A few quick questions to get us started: 1. Will you integrate a third-party odds/data feed, or manage odds in-house? 2. Which sports/markets matter most for launch? 3. Which jurisdictions will you operate in, so we plan licensing/compliance needs? Thanks & Regards, Deepak
£1,950 GBP in 30 days
5.7
5.7

Stirling, United Kingdom
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