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I need a compact leaderboard module that shows two key metrics—score and completion time—for every user. Viewers must be able to switch between an overall ranking and a by-category ranking, and they should also be able to filter results to display only today’s data. Your part is to handle the data layer and the core logic. The code should pull fresh figures from my existing database, calculate the rankings on the fly, and expose the results through a clean, well-documented endpoint (or set of queries) that I can plug straight into the front end. Deliverables • Queries or stored procedures that compute score and completion-time rankings • An endpoint or callable function returning overall or category ranks, with a “date=today” filter • Concise setup notes so I can drop everything into production Acceptance criteria • For any day, calling the endpoint without extra parameters returns the overall list sorted by score, then completion time • Supplying &view=category returns rankings confined to the requested category • Average response time under one second on a dataset of 100 k rows Keep the implementation straightforward, readable, and open to future additions such as weekly or monthly filters.
N° de projet : 40391033
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67 freelances proposent en moyenne $1 097 USD pour ce travail

Hello, I can build a clean, high-performance data layer for your two-metric leaderboard with real-time ranking based on score (desc) and completion time (asc). I’ll provide: Optimized SQL queries / stored procedures using efficient ranking functions Support for overall (default) and category-based views via parameters A simple endpoint with filters like view=category and date=today Proper indexing to ensure sub-second response time on ~100k rows Clean, ready-to-use response format for frontend integration The solution will be easy to maintain and extend (e.g., weekly/monthly filters later). I’ll also include concise setup notes so you can deploy quickly without friction. Budget and timeline can be discussed further based on your stack and requirements. Warm regards, Harpreet Singh
$750 USD en 5 jours
9,5
9,5

With over a decade of experience in high-performance Full-Stack Web, Mobile, and Blockchain Architecture, I understand your need for a Two-Metric Leaderboard with Filters. Your project goal of showcasing score and completion time metrics for users, with the ability to switch rankings and filter by category, aligns perfectly with my background in handling complex systems, including serving over 1 million users on Telegram Mini Apps and working on high-security FinTech projects. To ensure scalability and efficiency for your project, I recommend implementing a data caching strategy to reduce database load and enhance response times. Drawing from my experience in delivering solutions for large user bases, including the 1M+ user app on Telegram, I am confident in my ability to create a robust and responsive leaderboard module for you. I invite you to reach out to discuss the roadmap for implementing the Two-Metric Leaderboard with Filters. I am excited about the opportunity to contribute to your project and help you achieve your desired outcomes within the specified budget and timeline.
$1 200 USD en 20 jours
9,0
9,0

Hello, With a wealth of experience in database development and full understanding of JavaScript and PHP, my team at Our Software can deliver nothing short of a stellar job. Having created similar leaderboard modules in the past - some even more complex than your vision - I am confident that I can give you exactly what you desire: a two-metric leaderboard with efficient filters allowing a view of rankings defined by overall or by-category while providing response time that exceeds your expectations on any dataset. I assure you that my code will pull fresh data from your existing database effortlessly, compute ranking for both the scores and completion times and expose results through well-documented endpoints. Not only will our implementation meet your present need, but it would also be easy to adapt to future upgrades like weekly or monthly filters. Combining our expertise with your choice of entrusting this project to Our Software, success is definite. We believe in upholding excellence in every project we undertake, no matter how small or large it may be. Work with us and together let's turn your goals into reality, setting your business on an upward trajectory. Thanks!
$850 USD en 8 jours
8,6
8,6

Hi, This is Elias from Miami. I checked your project description and understand you need a compact leaderboard backend module that reads fresh data from your existing database, calculates rankings dynamically using score and completion time, and exposes a clean endpoint or callable query layer that supports overall, category-based, and today-only filtering. I’ve worked on data-heavy backend features and ranking logic before, including query optimization and API endpoints where response time and clean extensibility were important. For approach, I’d design the ranking logic at the query level first using efficient indexing/window functions or stored procedures, then expose it through a lightweight endpoint with clear parameters for overall/category/date filters, keeping the structure easy to extend later for weekly or monthly views. I’d be happy to go through the details and suggest the best technical approach. I have a few questions to get a better understanding: Q1 – What database and backend stack is your current system using (PostgreSQL, MySQL, SQL Server, Node, Laravel, etc.)? Q2 – How is “category” stored right now—directly on each result row, or through a related table/join? Q3 – Do you want ranking results returned as a paginated API response only, or should I also provide reusable stored procedures/views for direct internal use? Looking forward to hearing from you.
$1 125 USD en 7 jours
8,3
8,3

Good to see this project, I will build the ranking logic, database queries, and API endpoint that compute score and completion-time leaderboards — overall and by-category — with a "date=today" filter, plus concise setup documentation for production deployment. For sub-second responses on 100k rows, I will use composite indexes on (category, date, score, completion_time) and materialize the ranking with window functions (RANK/DENSE_RANK) directly in SQL rather than sorting in application code. This keeps the endpoint lightweight and makes adding weekly or monthly filters a simple WHERE clause change later. Questions: 1) Which database engine are you using — PostgreSQL, MySQL, or something else? 2) Should the endpoint be REST-based, or do you prefer a callable function within an existing framework? Looking forward to potentially working together. Thanks, Kamran
$790 USD en 13 jours
8,4
8,4

Hello, I can create a simple and reliable data layer that pulls your score and completion-time metrics, computes rankings in real time, and returns clean results for overall, category-based, and today-only views. The logic will stay straightforward and easy to extend later as you add weekly or monthly filters. I’ll keep the SQL and endpoint structure readable so you can plug it directly into your front end without extra work, and everything will be optimized for fast responses even with large datasets. Thanks, Teo
$1 000 USD en 5 jours
6,8
6,8

The main risk here isn’t query complexity—it’s keeping sub-second response times once ranking logic (especially per-category + date filters) starts scanning 100k+ rows repeatedly. Without careful indexing and query structure, this will degrade quickly under load. I’d implement ranking using optimized MySQL window functions (or fallback variables if needed), backed by composite indexes on (date, category, score, completion_time). A single parameterized query or stored procedure will handle both modes (overall vs category) and apply a dynamic date filter (defaulting to CURRENT_DATE). The PHP endpoint will act as a thin layer—validating inputs and returning a consistent JSON structure. To keep latency predictable, I’d avoid unnecessary joins and ensure the query is fully index-covered. As a small improvement, I’d design it to support future range filters (weekly/monthly) without rewriting logic. Built similar ranking APIs in Aras (Python/MySQL) handling 150k+ records under 500ms response, and scalable API layers in Bubbl (Vue/Nuxt/Express). Happy to align this cleanly with your existing schema. Q1: What does your current table schema look like (columns, indexes, row growth rate)? Q2: Is “completion time” stored as a timestamp or duration value? Q3: Do you expect concurrent writes during ranking queries (real-time updates)?
$1 000 USD en 7 jours
7,0
7,0

Hello, I read your requirement for building a leaderboard data layer with score and completion-time ranking, and I can implement a fast, clean, and scalable solution. I will design optimized queries/stored procedures that: Rank users by score (desc) and completion time (asc) Support both overall and category-based views Include a date filter (e.g., today) I’ll expose this via a lightweight API endpoint (Node.js or your preferred stack) with parameters like: view=overall | category category_id (if applicable) date=today The system will be optimized for performance using indexing, efficient sorting, and caching if needed, ensuring sub-1s response time on ~100k records. Deliverables: Optimized SQL queries / stored procedures API endpoint or callable function Clear setup and integration notes The structure will be flexible to extend later (weekly/monthly filters, pagination, etc.). Quick questions: Which database are you using (MySQL, PostgreSQL, etc.)? Do you prefer raw queries or API-based access? I can start immediately and deliver a reliable, production-ready solution. Regards, Jay
$1 125 USD en 7 jours
6,7
6,7

Hi there, I will implement MySQL queries/stored procedures and a PHP-callable endpoint that compute live two-metric rankings (score + completion_time) from your existing DB, with overall, category, and today-only filters; I will optimize for 100k rows and sub-1s responses. - Deliverable: MySQL queries/stored procedures that calculate score rank primary then completion_time tie-breaker, including indexed temp tables and parameterized date and category inputs - Deliverable: PHP endpoint (or callable function) returning JSON: overall or &view=category, with date=today default and pagination - Risk/quality-control: backup checkpoint + staged deployment and post-deploy validation to ensure minimal downtime and rollback plan Skills: ✅ MySQL ✅ PHP ✅ SQL queries / stored procedures ✅ API endpoint / PHP-FPM hosting ✅ Performance tuning / indexing / EXPLAIN Certificates: ✅ Microsoft® Certified: MCSA | MCSE | MCT ✅ cPanel® & WHM Certified CWSA-2 I’m available to start immediately. Is your database MySQL (version), and do you want the endpoint implemented as a RESTful PHP route or as stored-procedure calls wrapped by a lightweight callable function? Best regards,
$900 USD en 5 jours
6,0
6,0

Hello! I am a US-based senior software engineer with extensive experience in PHP, JavaScript, SQL, and software architecture. I carefully read your project description and understand the goal of creating a compact leaderboard module showing score and completion time. With around 15 years in the field, I've successfully completed similar projects. Could you please clarify the following questions to help me better understand the project? 1. What specific functionalities do you envision for the leaderboard filters? 2. Are there particular design preferences or frameworks you want me to use? In my previous work, I developed a leaderboard system for a gaming platform that effectively managed real-time data updates and user interactions. Additionally, I have built data management dashboards for various clients, ensuring optimized performance and user experience. As someone who pays attention to detail, I believe clear communication and structured milestones are crucial for success. My tactical approach would involve defining project phases, starting with requirements gathering and prototyping, followed by development and rigorous testing to ensure the module meets your expectations. I am excited about the opportunity to work on this project and deliver a high-quality solution. Looking forward to discussing this further! Best, James Zappi
$1 200 USD en 5 jours
5,9
5,9

Hi, I have 9 years experience in (SQL, MySQL, API development, backend logic, and high-performance query design). For this project, I have real hands-on experience building ranking systems, and I will design optimized queries or stored procedures that calculate score and time-based rankings efficiently, then expose a clean endpoint with support for overall, category-based views, and date filters while keeping response times fast and the structure easy to extend later. You can expect clear communication, fast turnaround, and a high-quality result. Best regards, Juan
$1 000 USD en 7 jours
5,8
5,8

I can build the leaderboard logic to compute and serve rankings directly from your database. Similar projects I’ve done involved updating ranking queries to handle multi-metric sorting and date filtering efficiently—keeping response times fast even on large datasets. To meet your needs, I’ll write optimized queries or stored procedures that calculate rankings by score then completion time for each user. The endpoint will accept parameters for view=overall or category and date=today, defaulting to overall with today’s data. I’ll ensure the data is fresh by pulling from your source tables on each request, and index the queries for sub-second responses on 100k+ rows. A quick question: what database system are you using? This helps me tailor indexing and querying strategies. Also, should category filters accept multiple categories or one at a time? I’ll deliver clean, readable queries and a simple endpoint with clear setup instructions so you can deploy it easily. Ready to start and get your leaderboard providing instant, accurate rankings today.
$1 125 USD en 7 jours
6,1
6,1

Interesting problem you're solving here, requiring a compact leaderboard module that shows score and completion time for every user, with the ability to switch between overall and by-category rankings, and filter results to display only today's data, which is a unique challenge that requires a thoughtful approach to the data layer and core logic, I've worked on a similar project where I had to calculate rankings on the fly and expose the results through a clean endpoint, and that experience taught me the importance of keeping the implementation straightforward and readable, you're looking for an endpoint that can return overall or category ranks with a date filter, and you've specified that the average response time should be under one second on a dataset of 100k rows, what's the expected volume of categories and how will they be defined in the database, I'll make sure to provide a concise setup and a clean endpoint that meets your requirements, let's discuss the project details further. Happy to share more about my approach — just send me a message.
$867,36 USD en 7 jours
5,1
5,1

You need a compact leaderboard that ranks by score then completion time, with overall vs category views and a “today” filter — that’s straightforward to do in the data layer. The real issue is producing stable, tie-aware ranks on the fly while staying sub-second on 100k rows; proper window functions plus targeted indexes solve that without heavy caching. I built a similar MySQL leaderboard for a quiz app (≈120k rows) using stored procedures and a PHP endpoint — average response ~700ms in production. Plan: write parameterized SQL (MySQL 8 window functions: RANK()/ROW_NUMBER()) that partitions by category when requested, orders by score DESC then completion_time ASC, and supports date=CURDATE(); expose a simple PHP endpoint returning JSON and include concise setup and index notes for production. I’ll keep the queries readable and easy to extend for weekly/monthly filters. Quick question: what MySQL version are you running and what are the exact column names for score, completion_time and category (and do you want pagination or the full list)?
$1 125 USD en 7 jours
4,8
4,8

Hello, I understand the need for a compact leaderboard module that showcases two key metrics - score and completion time - for each user. The ability to switch between overall and category rankings, along with filtering options for today's data, is crucial for a seamless user experience. To tackle this project, I will focus on the data layer and core logic. By leveraging my expertise in PHP, JavaScript, SQL, and API development, I will ensure that the code efficiently retrieves real-time data from your database, calculates rankings dynamically, and provides a well-documented endpoint for seamless integration with the front end. With a keen eye on simplicity and scalability, I will deliver optimized queries or stored procedures for ranking computation, an endpoint or function for flexible ranking display, and clear setup instructions for hassle-free deployment. I am confident that my experience in MySQL, API development, and software architecture aligns perfectly with the requirements of this project. I look forward to the opportunity to collaborate and bring your two-metric leaderboard vision to life. Best regards, Jayabrata Bhaduri
$1 500 USD en 7 jours
4,4
4,4

Hi, I understand you need a compact leaderboard module that dynamically computes rankings by score and completion time, with support for overall and category views plus a today filter. I have 14 plus years of experience building high performance data driven systems with clean APIs. I will design optimized queries or stored procedures to calculate rankings in real time, ensuring sorting by score and completion time. I will expose a fast endpoint with parameters for category and date filters, structured for easy frontend integration. The solution will be efficient, readable, and scalable for future extensions like weekly or monthly views. Software expertise in Node, Python, SQL, Laravel, and scalable backend architecture. I will ensure response time under one second for large datasets and provide clear setup documentation for smooth deployment. Happy to discuss structure and timelines. Thanks Arun
$1 200 USD en 15 jours
4,6
4,6

⭐⭐⭐⭐⭐ ✅Hi there, hope you are doing well! I recently developed a leaderboard system that dynamically ranks users by multiple metrics, allowing seamless filtering by categories and dates, ensuring smooth integration with front-end components. The key to success in this project is efficient data querying and precise ranking logic that maintains fast response times even for large datasets. Approach: ⭕ I will design optimized SQL queries or stored procedures to compute rankings by score and completion time. ⭕ Develop a clean PHP or JavaScript endpoint that accepts parameters for overall or category views and date filters. ⭕ Ensure the system returns results within one second on datasets up to 100k rows. ⭕ Provide clear documentation and setup instructions for effortless deployment and future scalability. ❓ Could you clarify which database system and version you are currently using? ❓ Are there any existing APIs or frameworks preferred for the endpoint development? ❓ Is there a specific format or data structure required for the endpoint’s output? I am confident in delivering a straightforward, scalable leaderboard solution quickly while meeting your performance and usability expectations. Best regards, Nam
$1 200 USD en 7 jours
3,9
3,9

Hi, this is Carlos. I reviewed your project brief and understand you need a compact leaderboard module that shows user scores and completion times, with the ability to filter by overall or category ranking, and support for daily data queries. I have experience with backend systems and optimizing data queries for performance. Here’s how I would approach this: Q1: Do you have a specific database platform (e.g., MySQL, PostgreSQL) or is this agnostic to the choice of DB? Q2: Would you like any user data (e.g., user IDs, category names) stored alongside their metrics for future reference or analysis? Q3: Should the ranking computation consider additional parameters in the future (e.g., time-based weights, achievements)? I look forward to hearing from you!
$750 USD en 4 jours
3,7
3,7

Hello, I checked your project "Two-Metric Leaderboard with Filters" and I already have a clear idea how to deliver this efficiently. I have solid experience in PHP, JavaScript, SQL, Software Architecture, MySQL, Database Development, API Development, Data Management, and I’ve worked on similar projects where I delivered high-quality, scalable, and clean solutions. Why choose me? • Strong expertise in PHP, JavaScript, SQL, Software Architecture, MySQL, Database Development, API Development, Data Management • Clean, optimized, and scalable code • Fast communication and daily updates • 100% focus on delivering results, not just code If needed, I can also suggest improvements to make your project even better. Let’s connect I’m ready to start right away. Best regards, Umer
$750 USD en 2 jours
3,2
3,2

Hi, I think the main issue in your project at this time is building a fast, flexible ranking layer that can handle multiple views (overall/category) and date filters without slowing down queries on large datasets. The key is efficient sorting logic and clean parameter handling at the query level. I’ll implement optimized SQL (or stored procedures) that rank users by score DESC + completion time ASC, with optional filters for category and “today.” Then I’ll expose a lightweight API endpoint (Node/Django—matching your stack) that accepts params like view=category and date=today, returning clean JSON ready for your frontend. To keep response time under 1s on 100k+ rows, I’ll use indexed fields (score, category, timestamp), window functions (ROW_NUMBER/RANK), and caching where needed. The structure will stay simple so you can extend later (weekly/monthly filters, pagination, etc.). I’ve built similar leaderboard systems with real-time ranking and filtering, so I’ll focus on performance + clarity. To proceed, I’d need: • DB type (PostgreSQL/MySQL/etc.) • Table schema (users, scores, timestamps) • Preferred backend (Node or Django endpoint) Happy to discuss edge cases and scaling next ?
$1 500 USD en 7 jours
2,2
2,2

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