Create a Calculator on the Website

Task Description: We are looking for a developer to create a simple web-based parking space management system without monthly paid subscriptions, turnkey.What is available: A detailed parking layout in DWG (AutoCAD) format. In total, about 500 parking spaces.Main task: It is necessary to transfer this layout to a web interface so that each parking space becomes clickable and dynamically changes color (for example, Green — Free, Red — Occupied). This is an electronic register for long-term rentals (manual data entry by the manager is planned; automation with sensors, barriers, or cameras is not needed).Role distribution and access: Manager: Works from a computer in the office. Has access to the "admin panel," where they can change the status of each parking space (free/occupied) and enter a description (for example, the name of the renting company). Security: Located on the premises, connects from mobile devices (phone, tablet, or laptop) via mobile internet. Security has view-only access (Read-only). They click on a space and see information: Space number, Status, Company name. They do not have the ability to change anything.Implementation requirements: Turnkey work: from adapting the layout for the web to deploying the system and database. The map interface must be responsive for easy scaling and finger clicks on smartphone screens. Propose the optimal way to host the system: either deploying on our office PC (external access setup will be needed for the security's mobile internet) or using free cloud limits.Please, in your response, suggest your version of the tech stack and architecture (where it is better to host the database so that security has access from 4G), and also indicate the estimated cost and timeline for the project. Important note regarding budget and functionality: The project is being done exclusively for internal use and basic convenience. We DO NOT need complex design solutions, CRM systems, integrations with payment gateways, SMS notifications, and the like. We need a maximally simple, concise, and functional interface without excess code. Therefore, please assess the project adequately — offers with overpricing will not be considered. Thank you.

Experienced OpenCart developer needed for project acceptance and further support I am looking for an experienced OpenCart programmer (not a studio) who can professionally accept the online store from the current developer and will further handle its support, development, and SEO optimization. About the project Online store on OpenCart. The project is approximately 99% ready and verified according to the technical specifications. A technical audit needs to be conducted before the final handover of the site. After the handover, long-term cooperation for project development is planned. Main tasks Conduct an audit of the code and project structure. Check the quality of the implemented functionality. Check the installed modules, their compatibility, and correct operation. Assess the security and stability of the site. Check the performance and suggest recommendations for improvement. Check the implemented SEO part and propose a further optimization plan. Ensure that the project is fully ready for independent support without dependence on the previous developer. Check the correctness of the transfer of all accesses: source code; database; FTP; hosting; domain; email; administrative panel; installed modules and their licenses. If necessary, participate in communication with the current developer during the project handover. Provide a list of recommendations and comments before the final acceptance. Further cooperation After the site acceptance, regular work on the project is planned: development of new functionality; SEO optimization; performance improvement; integration with external services; technical support. Candidate requirements A specialist is needed who: has significant experience specifically with OpenCart; has a good understanding of OpenCart architecture and popular modules; has experience in auditing and supporting existing projects; can reasonably assess the quality of completed work; takes agreements seriously and adheres to agreed deadlines; is interested in long-term cooperation. In your response, please indicate experience working with OpenCart; examples of implemented online stores; whether you have conducted technical acceptance or audits of other projects; estimated cost: technical audit; participation in project acceptance; hourly or project support after the handover. Preference will be given to specialists with many years of experience working with OpenCart, who take their work seriously, adhere to agreed deadlines, and are ready to become a technical partner of the project for the long term.

It is necessary to migrate the Opencart online store from PHP 7.4 to PHP 8.x. Currently, the core version is 3.0.3.8. We read that most likely the core will also need to be migrated to version 4.0 and there shouldn't be many difficulties... The functionality is mostly custom, and there are also Simple, OCFilter, Nova Poshta. We are waiting for recommendations and an approximate price. Ideally, someone who has already done similar work.

Hello everyone, we need to create a website for event creation and ticket sales. Possible options include using a ready-made template, a framework, or your own solution. It is preferable that you have experience in developing websites for ticket sales. We will send examples of websites in private messages. If necessary, we will create a prototype. If you have previously worked on similar websites, please send examples in private messages. We will discuss the details in private messages. Thank you and have a great day!

Development of the Architecture for a Unified Fleet Management Platform for WordPress SitesProject Context There is a fleet of several dozen WordPress sites hosted on a single server and maintained by one team. The sites are gradually being transitioned to a unified development and support standard — a common design system with a unified block library (ACF + Gutenberg) and a unified security standard. An architecture is required for centralized management of this fleet.Task A technical architecture for a unified fleet management platform for WordPress sites needs to be developed. The platform is not a metrics dashboard, but a full-fledged system for centralized management and access.Platform Requirements Single Sign-On for Super Administrator — a single entry point for managing all sites in the fleet: overview of status, versions, compliance status. One-click access to the admin panel of each site — the ability to enter the wp-admin of any site in the fleet from a single interface, without storing/entering passwords for each site separately. A well-thought-out authentication mechanism is required (tokens with limited lifespan, binding to a specific user, complete access logging). Role Segmentation: the super admin sees and manages the entire fleet; administrators of individual sites have access only to their own sites. Unified Design System with Site-Level Customization — a common block library (ACF + Gutenberg), distributed to all sites through a central update mechanism, but with the ability for local customization of blocks for a specific site without losing compatibility with future updates of the library. Common Monitoring and Alert Dashboard — status of sites and server, alerts about outages/problems, update status and compliance of each site with respect to the unified standard. Convenient Addition of New Sites to the Network — the platform must support quick cloning/deployment of a new site based on a unified standard (Core plugin, design system) and connect it to the Hub with minimal manual steps.Architectural Constraints (Important) WordPress Multisite is not considered and is not suitable for this task. The reason is not the convenience of the interface, but the fundamental architectural properties of Multisite: A shared database and core for all sites in the network mean a single point of failure: an incorrect plugin or core update can simultaneously disable all sites in the network, not just one. A shared pool of server resources (PHP workers, database connections) means that abnormal load on one site (promotion, traffic spike, attack) degrades the performance of all other sites in the network, including those not related to this load. This systemic property of Multisite cannot be eliminated by process or discipline — therefore, an architecture is required where each site remains an independent installation (own database), and unification and centralized management are achieved by other means.Preliminary Architectural Direction Currently, the most promising architectural approach appears to be Hub & Spoke, where independent WordPress installations (“Spokes”), each with its own database, are united: by a common distributable Core plugin (block library, security baseline, bridge module for connection to the Hub); by a central management application (“Hub”) — site registry, one-click login, monitoring, alerts. However, this architecture is not a predetermined solution. If the executor believes that there is a more suitable architectural approach, they may propose an alternative provided it is technically and economically justified. A separate task within the terms of reference — a reasoned analysis and recommendation: to build the Hub from scratch custom or to take a ready-made self-hosted solution (MainWP, InfiniteWP, ManageWP or analogs) as a basis and expand it under specific requirements (integration with the Core plugin, compliance tracking of block versions, future marketing layer). A comparative assessment of timelines, support costs, flexibility, and limitations of each option is needed, with a clear recommendation.Architectural Requirements When designing the solution, the following non-functional requirements must be considered: fault tolerance and absence of a single point of failure for the fleet of sites; the ability for independent updating, rollback, and maintenance of each site; minimization of blast radius during failures and update errors; the ability for horizontal scaling as the number of sites grows; security of centralized management and delegated access; the possibility of subsequently isolating the Hub into a separate infrastructure without changing architectural principles; expandability of the platform for adding new centralized services. Moreover, the architecture must remain viable when the number of sites increases from several dozen to 100+ without the need for a fundamental revision of the chosen approach.Long-Term Development of the Platform The platform is viewed as a long-term foundation for the company's digital ecosystem, not just as a tool for administering WordPress sites. When designing, the possibility of subsequently adding centralized services (for example, managing marketing activities, analytics, component library, integrations, and other modules) without the need to rework the basic architecture must be considered.Technologies The specific stack is not predetermined — the executor independently proposes and justifies technologies in the architectural document (language/framework for the Hub, hosting/deployment model, authentication mechanism, etc.), based on the requirements of the task. A reasoned proposal for technologies is a mandatory part of the work result, alongside a comparison of custom vs ready-made solutions for the Hub.What is Required from the Executor Experience in designing multi-site/multi-tenant architectures on WordPress (principally — NOT based on Multisite) Practical experience with MainWP/InfiniteWP/ManageWP or similar fleet management systems — understanding their capabilities and limitations at the API/extendability level Experience in developing production-level WordPress plugins (ACF, Gutenberg block development, REST API) Understanding security issues when building centralized/delegated access systems (token-based auth, access auditing, minimizing blast radius) Ability to prepare architectural documentation: diagrams, API contracts between Hub and sites, data schemaWork Format The first stage — an architectural document with a reasoned solution (custom vs ready-made solution), a scheme of component interaction, API contract Hub ↔ Core plugin, phased implementation plan. The document should include a wireframe scheme of the platform interface (key screens: site registry, admin access, monitoring dashboard). Following the approval of the architecture — further cooperation may be possible. Important Note Independent architectural development is expected, based on practical experience in designing and operating similar systems. It is not sufficient to provide a compilation of general recommendations or standard responses generated by AI. Each key architectural decision must be accompanied by a technical justification: why this approach was chosen, what alternatives were considered, what its advantages, limitations, and potential risks are in the context of this project. If necessary, the executor should refer to practical experience, existing solutions, documentation, open-source projects, or other sources that confirm the viability of the proposed architectural solutions.