Optimisation des performances Jobs

I need an experienced instructor who can take me through advanced-level administration of both Oracle Core databases and Oracle E-Business Suite. I already work daily with the technology; what I’m missing is a structured, in-depth programme that ties together best practices, real-world troubleshooting, and the latest features. Scope • Oracle Core DBA topics: upgrade paths (12c-19c), RAC configuration, Data Guard, RMAN backup/recovery, performance tuning, and diagnostic utilities. • Oracle E-Business Suite: architecture, cloning, patching with adop, concurrent manager tuning, and secure configuration. Training Style We will meet online in live, interactive sessions that mix white-board style explanations with hands-on labs I can reproduce on my own VM. I prefer short...

I need an experienced instructor who can take me through advanced-level administration of both Oracle Core databases and Oracle E-Business Suite. I already work daily with the technology; what I’m missing is a structured, in-depth programme that ties together best practices, real-world troubleshooting, and the latest features. Scope • Oracle Core DBA topics: upgrade paths (12c-19c), RAC configuration, Data Guard, RMAN backup/recovery, performance tuning, and diagnostic utilities. • Oracle E-Business Suite: architecture, cloning, patching with adop, concurrent manager tuning, and secure configuration. Training Style We will meet online in live, interactive sessions that mix white-board style explanations with hands-on labs I can reproduce on my own VM. I prefer short...

My WordPress site has become sluggish across the board—homepage, product pages, and even blog posts now take far too long to appear. After adding a few new plugins, Google PageSpeed Insights scores have dropped and the user experience is suffering. The job is straightforward: • Diagnose every bottleneck affecting the homepage, product pages, and blog posts. • Optimise code, images, database queries, and remove or replace any plugin that slows things down. • Configure caching, minification, lazy-loading, and the other best-practice speed tweaks that work for WordPress. • Deliver a clear before-and-after report from Google PageSpeed Insights (mobile and desktop) showing substantial improvement. Everything must remain fully functional once you are done, with ...

My site works, but it feels slow. I need an experienced developer to dig in, streamline the code, and cut the page-load time dramatically—loading speed is the top priority. While you are under the hood, I also want you to apply modern SEO best practices and be sure every improvement holds up on mobile, tablet, and desktop. If an idea boosts UX or search visibility without compromising speed, I am open to it. Here is what I expect: • A clear audit of current bottlenecks (caching, image weight, script order, server settings, etc.) • Concrete performance gains—sub-2-second first meaningful paint on the home page and solid Core Web Vitals that pass Google Lighthouse. • No broken layouts or lost functionality; the site must remain responsive across devices. &...

I need a Farsi-speaking web professional who can jump in right away and refresh my existing site. The first priority is to add a full catalogue of (service-based products) so visitors can browse, compare and purchase with ease. Alongside that, I want the look and feel of several pages refined, a couple of practical new features introduced, and overall speed and performance boosted. Because the site is already live, I’m looking for someone who can work directly on production (with proper backups) and deliver visible results quickly. A solid grasp of RTL styling, Persian fonts and Farsi copy entry is essential; if you’ve previously optimised WordPress, Shopify or any custom PHP stack for Farsi audiences, please highlight that. Deliverables I’ll review for acceptance: &bul...

I have a live SwiftUI-based social app that already ships chat, video feeds, stories, live scenes, an in-app currency (stars) and subscription flow. The code follows MVVM, talks to a set of REST back-ends and is in the store today. What I need now is an experienced iOS engineer who can drop into the existing project, diagnose issues quickly and raise the overall quality bar. The immediate focus is three-fold: • First, do a thorough walkthrough of the current codebase so you understand our MVVM layers, networking helpers and IAP logic. • Next, remove bugs that are spiking our crash reports and tighten up general stability. • Finally, tune performance in the chat and media areas, then layer in a handful of small feature requests we already have queued for those modules....

I’m expanding our infrastructure team and need an India-based engineer who already lives and breathes Zabbix. This is a permanent role, not a short contract, so I’m looking for someone who can take full ownership of our monitoring platform and grow it with us. To hit the ground running you will: • Build and fine-tune end-to-end system monitoring on fresh and existing hosts. • Create intuitive, real-time dashboards that speak to both ops engineers and executives. • Craft actionable alert rules that work consistently across Linux, Windows and macOS environments. Only an expert level of Zabbix experience will work here; you should be comfortable architecting high-availability setups, optimizing proxies, and scripting advanced item prototypes without hand-hol...

I’m looking for ongoing, month-to-month care that keeps my WordPress site running fast and smoothly. My top priority is overall site performance, and the quickest win will come from tightening up server-side efficiency. Each month I’d like you to review performance metrics, implement back-end tweaks, and leave the front-end feeling effortless for visitors. Typical tasks include checking and updating plugins and themes, configuring caching layers, refining database queries, and fine-tuning any server-level settings that influence time-to-first-byte. I frequently monitor Google PageSpeed Insights and GTmetrix, so your work should show measurable gains there. You’re free to bring in tools like WP Rocket, Cloudflare, or custom Nginx/Apache rules—whatever best lifts rea...

I am looking for an experienced WordPress developer who can diagnose and fix performance issues on my website. My website has recently become very slow and takes a long time to load. I suspect there may be a file conflict, plugin conflict, or another technical issue causing the problem. The task includes: Identifying the root cause of the slow performance Fixing any plugin, theme, or file conflicts Optimizing the website to improve loading speed and overall performance This task is urgent, so I am looking for someone who can start immediately and resolve the issue quickly. . You will need to: • Profile the installation to uncover the bottleneck—whether that’s a rogue plugin, theme conflict, bloated queries, or an oversized asset. • Resolve the conflict or mis-conf...

Ich setze das Amalia Booking Tool produktiv ein und kämpfe aktuell mit zwei Hauptproblemen: spürbare Performance-Einbrüche sowie Störungen in der Benutzeroberfläche (Darstellungs­fehler, Buttons reagieren verzögert usw.). Ich brauche deshalb gezielte Fehlerbehebung und fortlaufenden Support durch eine Person, die Amalia aus der Praxis kennt. Dein Auftrag umfasst: • Analyse der Ladezeiten und Identifikation der Performance-Flaschenhälse • Behebung der erkannten Ursachen (z. B. Datenbank-Optimierung, Caching, Skript-Anpassungen) • Korrektur der UI-Probleme, sodass sämtliche Buchungsschritte wieder flüssig und intuitiv ablaufen • Abschluss-Tests und kurze Dokumentation der vorgenommenen Änderungen Ich stelle a...

I'm looking for an experienced SQL Server optimization specialist to improve performance on my SQL Server 2019 instance. Key Areas of Focus: - Query performance - Indexing strategies - Database design Ideal Skills and Experience: - In-depth knowledge of SQL Server 2019 - Proven track record in optimizing SQL Server databases - Strong analytical skills to identify bottlenecks - Expertise in indexing and query optimization techniques - Familiarity with database design best practices Please provide examples of previous work and success metrics.

Overview: The system must be architected to meet enterprise CPaaS performance. Post award of project you will be shared a GitHub Repo update to be pushed there only. The scope includes backend API development, database schema design, & webhook hooks. The service must be built as a extension to existing service to ensure seamless, scalable, and repeatable integration into the main platform. 1. API & Webhooks for Clients • Public API endpoints for sending campaigns, managing templates, and fetching reports. • Webhook support for: • Delivery receipts (DLRs) • Incoming messages/user replies • Sustain minimum 500–1,000 send requests/sec under normal load. • Burst handling up to 3,000 TPS with graceful queuing (no message loss). 2. Integration Layer...

I need a seasoned LUA developer who also speaks the language of audio engineering to extend the processing palette on Symetrix, RANE and Allen & Heath DSP platforms. The work sits squarely inside each manufacturer’s SDK, so the GUI framework is already included what we need from you is efficient signal-flow code that drops straight into the existing interface. Primary tasks • Write well-commented LUA modules for DSP • Add pitch and general frequency-management routines that can be chained with, or operate independently of, the above effects. • Optimise code and supply test files that we can provide feedback on Further details on request..

I’m looking for a Swift-savvy iOS developer who can turn my finished Google AI Studio design (supplied as TSX files) into a production-ready SwiftUI application that downloads video and audio from popular social networks. Here is the full scope of work: • SwiftUI build: translate every screen from the existing TSX design into clean, maintainable SwiftUI code, keeping the original look and feel intact and making sure the layout is 100 % iPhone-compatible, all the way back to the oldest iOS version still accepted by the App Store. • Background downloading: implement reliable, resumable downloads so users can leave the app while large files finish in the background. • No login flow: the app must work without any form of user authentication. • Local storage ...

Tengo una base de datos MySQL 5.7 (compatible con MariaDB) que alimenta una aplicación PHP / Laravel con tablas de millones de registros. El principal dolor que quiero resolver son las consultas lentas; necesito que el sistema responda con la agilidad que nuestros usuarios esperan. Busco a alguien con experiencia probada en entornos de alto volumen que analice a fondo la base, detecte cuellos de botella y me entregue soluciones listas para producción. Valoro el dominio de EXPLAIN, performance_schema y cualquier otra herramienta de análisis de consultas. Quiero trabajar específicamente en: • Optimización de consultas • Revisión de índices • Revisión y ajuste de la configuración de MySQL Entregables espera...

We are looking for an experienced GraphQL Engineer with strong skills in C# .NET and Microsoft Azure to help design and build scalable GraphQL APIs for distributed systems. The main focus of this role is GraphQL API ownership, backend development, and Azure cloud operations. Experience with Kafka or event-driven systems is a plus but not required. Responsibilities Design, develop, and maintain GraphQL APIs Define and evolve schemas, resolvers, and data models Integrate multiple backend services into a unified GraphQL layer Optimize API performance (N+1, batching, caching) Build backend services using C# .NET Deploy and operate applications on Microsoft Azure Collaborate with frontend teams consuming the API Requirements 5+ years of software engineering experience Strong experie...

My website already runs on a JavaScript front-end, but the current server-side rendering is spotty—some pages arrive half-rendered or drop key components altogether. I need a developer who can refactor the SSR layer so every page consistently ships fully rendered HTML to the browser before hydration, no matter the device or browser version. Once the rendering pipeline is solid, I want the site’s organic visibility strengthened. That means: • Dynamic keyword-driven titles, headings, and schema that pull from our CMS • Clean, unique meta tags and descriptions injected at render time • Page-speed wins that are easy to prove—compressed assets, smart caching, and any low-hanging performance tweaks you spot Acceptance criteria • No incomplete or inc...

We have a binary trading website with a working graph, but we want to improve its performance and fix some issues. The goal is to make the graph smoother, more responsive, and professional like top trading platforms. Tasks: 1. Optimize Graph Smoothness: • Make real-time updates smooth without jumps or lag. • Use incremental updates instead of full re-rendering. • Improve animations using requestAnimationFrame or similar methods. 2. Improve Performance: • Limit the number of candles loaded for efficiency. • Compress or aggregate older data for smoother scrolling. • Ensure fast rendering even with live data updates. 3. Bug Fixes: • Fix price jumps or candle overlaps. • Resolve any WebSocket or data feed issues. • Sync server and clien...

I keep getting the message “The action cannot be completed because the other program is busy” on my Windows machine and it’s driving me crazy. The alert pops up constantly—there’s no single app I can link it to—so I need someone who can dig in, trace the root cause, and stop it for good. You’ll have remote access to the computer to run diagnostics, inspect event logs, check for stuck COM or DDE calls, and rule out background services or conflicting startup items. Once the culprit is identified, I expect the fix applied, a short summary of what was wrong, and clear steps I can follow if it ever re-appears. Deliverables • Root-cause report (brief but specific) • Applied fix with confirmation the alert no longer appears after a reasona...

My WooCommerce store looks great, yet Google Lighthouse keeps flagging it for slow page load and inefficient resource use. I already run a caching plugin and multiple optimizations, but it clearly isn’t enough—especially because the site is reaching around 70-80 in google lighthouse Here’s what I need from you: Optimize the post pages and the product pages to reach 90-100 on google lighthouse. Keep the workflow transparent, I have backed up everything and you can directly work in production Here is the website https://xn--80abdexbacmj8a3a8e.xn--90ae/

I recently purchased a commercial Laravel starter kit and have run into two main pain-points: certain features break during specific user actions and overall performance drags under load. I need an experienced Laravel developer to dive into the repository, trace the root causes, and ship clean, tested fixes. Here’s what I’m dealing with right now: • Functionality issues surface only when particular workflows are triggered (for example, navigating deeper into authenticated areas, saving complex forms, or hitting AJAX endpoints). Your task is to audit the codebase, locate and repair the offending logic, then optimise any queries or middleware that are slowing things down. I’m already set up with Git, so you’ll work in a separate branch, commit frequently, a...

Actualmente gestiono un inventario de productos en una base de datos de Microsoft Access y la limitación de un solo usuario está frenando el crecimiento del negocio. Quiero trasladar toda la información a Microsoft SQL Server para que varias personas puedan leer y escribir datos simultáneamente y, de paso, incorporar algunas mejoras sobre la funcionalidad actual. Lo esencial del encargo: • Migrar por completo la estructura y los datos del inventario desde Access a SQL Server, manteniendo la integridad y las relaciones existentes. • Configurar roles y permisos que permitan a distintos usuarios leer y escribir datos de forma segura. • Replicar las funcionalidades que ya uso en Access (formularios, consultas clave, reportes básicos) y pr...

Hace unos días mi tienda en línea fue infectada por un virus malicioso. Desde entonces sufro redirecciones indeseadas y un rendimiento cada vez más lento. Busco a alguien de habla hispana con experiencia demostrable eliminando malware “invisible” en sitios de comercio electrónico. Lo que necesito que hagas: • Realizar un escaneo completo para localizar todos los archivos o scripts infectados. • Eliminar por completo el malware sin interrumpir las ventas ni perder datos. • Reforzar la seguridad (firewalls, permisos, actualizaciones, copias de seguridad) para evitar futuras infecciones. • Restaurar la velocidad normal de carga y verificar que no queden redirecciones. • Entregarme un informe final con los archivos m...

My SaaS-style web platform is already about 90 % complete; what I need now is a seasoned full-stack developer who excels at stepping into an existing codebase and driving it across the finish line. The top priority is thorough bug fixing and system testing. I expect a balanced mix of manual exploration and automated test suites so we can catch both edge-case glitches and any regressions before launch. Scope of work • Run a full test pass, document defects, and patch them. • Validate and, where needed, correct the usage-limit logic that controls free vs. paid quotas. • Polish the UI for mobile, tablet, and desktop breakpoints so every component renders cleanly and responsively. • Integrate the remaining ad slots and confirm the affiliate and withdrawal flows func...

My Supabase-backed web application needs a solid, automated maintenance routine. The core of the project is to keep the database healthy and fast, so I want complete coverage for three areas: regular backup and reliable recovery paths, performance tuning that actually shaves time off the heavier queries, and a clean workflow for applying Supabase/PostgreSQL updates and security patches without downtime. I already have the project running on Supabase; what’s missing is the living set of scripts, schedules, and monitoring rules that turn ad-hoc admin work into a predictable process. You’ll work directly in Supabase (and the underlying Postgres layer) and can bring in any complementary tooling—pg_dump, cron, pgBouncer, Grafana, or similar—as long as it integrates smoo...

We are looking for a Senior Embedded Software Engineer with strong experience in Telecom/O-RAN to work with us on a client project. The role involves development, optimization, and maintenance of embedded software components in a Linux environment, with a focus on performance, reliability, and clean code. Responsibilities: Design, develop, and maintain embedded C/C++ modules for telecom/O-RAN systems Work on Linux-based environments, including debugging, optimization, and performance tuning Integrate and test software components within existing telecom infrastructure Collaborate with our internal engineering team and client’s technical team Write clean, maintainable, and well-documented code Participate in code reviews and propose improvements Requirements: Strong hands-on e...

Hi, I am looking for an experienced DevOps / Linux server optimization expert for a LIVE high-traffic production website. Please apply only if you have real experience handling 50,000+ concurrent users, Cloudflare setups, and strong security hardening. IMPORTANT: The website is already LIVE and fully uploaded. CyberPanel is already installed and running. I only need optimization, scaling, and security improvements (NOT fresh installation). Current Infrastructure: • Dedicated main server: 64GB RAM, 1TB NVMe () • Offshore VPS: 1GB RAM (to be used as reverse proxy/security layer) • Domain provider: • Panel: CyberPanel + OpenLiteSpeed (already installed) • Laravel/PHP website (already live) • Need full integration My Requirements: PERFORMANCE: • Extreme...

We need a senior developer (freelancer or agency) to fix critical issues and deliver production-ready updates for a mobile-first app. Tech stack - Backend: ASP.NET Core Web API (C#) - Database: PostgreSQL - Realtime/chat: Firebase Firestore - Mobile: Flutter - Web/admin: React (nice-to-have) Must deliver (priority scope) - Password reset emails not delivered: diagnose provider/config/deliverability and make it reliable. - CV/PDF download shows “success” but file does not download/open: fix file storage + delivery flow (streaming or signed URL) and correct response headers. - Payment flow redirects/loops and the app cannot return after payment: fix return URL/deep link/callback handling and make the flow consistent. - Performance: Improve response times using pagination, index...

The goal of this project is to significantly improve the website’s loading speed and overall performance, ensuring a load time of under 3 seconds on both mobile and desktop devices. Faster website performance will enhance user experience, reduce bounce rate, and improve SEO rankings and conversion rates. Project Objectives • Achieve page load time below 3 seconds on mobile and desktop • Improve Google PageSpeed Insights, Core Web Vitals, and Lighthouse scores • Optimize website for better user experience and search engine performance • Ensure smooth performance without affecting design or functionality Scope of Work • Image optimization and next-gen format implementation (WebP/AVIF) • Minification of CSS, JavaScript, and HTML files • Browse...

My existing Power BI report pulls several large tables from Microsoft Dynamics 365 Business Central through the standard API. The model works, but the scheduled refresh now fails with frequent time-outs; reliability is my biggest concern. So far I have: • enabled incremental refresh on the largest tables • tuned a handful of queries • experimented with splitting data into smaller API calls None of these measures has eliminated the failure. I need an expert who can: 1. pinpoint the exact bottleneck within the current data model, gateway settings, or API calls 2. redesign the retrieval strategy so the report finishes every refresh window without timing out 3. leave me with a clean, documented PBIX (or dataflow) that follows best practice for query folding, pa...

Tengo un sistema de facturación electrónica para Ecuador escrito completamente en Java. Funciona bien a nivel de interfaz y cálculos, pero la lógica de negocio se vuelve lenta justamente en el paso de envío de la factura al SRI; allí aparecen cuellos de botella que provocan demoras y, en ocasiones, time-outs. Necesito que revises a fondo ese módulo, identifiques la causa del problema de rendimiento y entregues una solución limpia que mantenga compatibilidad con los requisitos del SRI. Me interesa especialmente: • Perfilado y diagnóstico claro del código existente. • Refactor o ajustes puntuales que mejoren la velocidad de conexión y respuesta. • Pruebas unitarias y de integración que de...

I’m refining an existing EdTech platform whose backend is built on Laravel and whose user-facing layer runs on Angular. I need a full-stack developer (7+ years of experience ) who can slip into the current codebase, resolve a handful of blocking bugs, and then roll straight into feature work and performance tuning. Ability to convert functional requirements into technical requirements, familiarity with API integrations, AI and automations is a must have. Deliverables • Fix the critical issues • Implement the new features and enhancements • Provide ongoing support Weekly commitment of 20hours/week.

The codebase is a React front end that relies on Supabase for authentication, data storage, and real-time updates. A series of stubborn bugs have crept in—misfired auth callbacks, occasional data mismatches after writes, and visibly broken UI states when the websocket drops. Your first mission is to isolate and eliminate those issues so the app runs cleanly, with no console errors and all existing unit tests green. Once the core bugs are gone, I’d like a quick pass on the database schema (a couple of tables need index tweaks and a foreign-key adjustment) and help preparing a production deployment workflow. The stack is already wired to GitHub; I deploy to Vercel, but I’m open to your preferred routine as long as rollbacks are painless. Everything needs to be wrapped up ...