jQuery Developers Who Build Production Web Apps
TESSA Marketing & Technology has been delivering jQuery services since 2012. Our jQuery developers create interactive, performant, and maintainable web applications for global companies, small businesses, and everything in between.
This page covers what TESSA’s jQuery developers do, how our process works, the technical skills our team members bring to every project, and why companies hire us when they need reliable software development on the most widely deployed JavaScript library there is.
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Why Companies Still Hire jQuery Developers in 2026
The “jQuery is dead” narrative is louder than the reality. According to W3Techs, jQuery is used by approximately 64% of all websites as of November 2026, holding roughly an 85% market share among sites that use any known JavaScript library. That makes jQuery, released in 2006 by John Resig, still the most widely deployed JavaScript library in use, by a significant margin.
The reason isn’t nostalgia. The reason is that jQuery powers tens of millions of production websites, WordPress installations, e-commerce platforms, and internal business applications that work, generate revenue, and don’t need replacing. Companies hire jQuery developers because rewriting a working codebase in React or Vue is expensive, risky, and rarely justified by business value.
Our developers help companies maintain, extend, and optimize the code that runs their businesses, without forcing them into unnecessary rewrites or risky migrations.
Legacy jQuery Code Maintenance
The vast majority of jQuery work in 2026 is maintenance and incremental improvement of existing codebases. Our team specializes in working with jQuery code that’s been in production for years: finding bugs, speeding things up, adding new features, and keeping these sites running reliably.
WordPress Development at Scale
WordPress ships with jQuery by default, and a huge percentage of WordPress themes, plugins, and custom work relies on it. Our WordPress team uses jQuery daily to create the interactive elements that make WordPress sites feel modern, fast, and responsive.
Faster Development for Specific Use Cases
For interactive UI features that don’t justify a full single-page application — accordions, modals, animations, AJAX form handling, dynamic content loading — jQuery still ships faster than spinning up React infrastructure. Our developers know when jQuery is the pragmatic choice.
Cross Browser Compatibility
jQuery was originally created to solve cross browser compatibility issues. Browser engines have closed most of those gaps, but compatibility quirks still appear, and jQuery’s battle-tested abstractions still save development time when supporting older browsers or edge cases matters.
Custom Plugins for Specific Business Needs
jQuery’s extensive plugin ecosystem covers most common interactive patterns, but specific business requirements often call for a custom plugin written from scratch. Our team creates custom plugins that integrate cleanly with existing codebases without bloating the page or introducing new dependencies.
Modernization Path, Not Forced Rewrites
When a jQuery codebase genuinely needs to evolve toward modern JavaScript frameworks like React, Vue, or vanilla JavaScript, we help companies plan a phased migration rather than a risky big-bang rewrite. Our developers’ approach: write the right code for today, leave the codebase ready for tomorrow.
What TESSA’s jQuery Development Services Cover
Our jQuery development services span the full lifecycle of an engagement, from initial planning and architecture through development, testing, deployment, and post launch support. We take on new projects, ongoing maintenance, and modernization work.
Custom jQuery Plugin Development
Our developers create custom plugins from scratch for projects with unique interactive requirements. Each plugin we deliver follows modular coding principles, includes proper documentation, ships with an easy-to-use API, and integrates cleanly with the broader jQuery library and existing application code.
jQuery Performance Optimization
Performance is the most common complaint about jQuery codebases, and most of those complaints are about poor implementation, not the library itself. Our work includes audits, code refactoring, selector caching optimization, event handling improvements, and Core Web Vitals work that directly impacts SEO rankings.
AJAX and Dynamic Content
jQuery’s AJAX methods remain a pragmatic way to load dynamic content, submit forms without page refreshes, and power interactive web apps. Our developers implement AJAX patterns that handle errors gracefully, work in modern browsers and older ones, and integrate with REST APIs or GraphQL backends.
jQuery and WordPress Integration
WordPress is one of our most common use cases for jQuery and web development. We build custom WordPress themes and plugins that use jQuery effectively without conflicting with the version WordPress bundles or creating compatibility issues with other plugins.
Legacy jQuery Migration
For companies whose codebase started a decade ago, we offer migration services: moving from older jQuery versions to current ones, modernizing patterns, removing deprecated APIs, and reducing technical debt without breaking existing functionality.
Hybrid jQuery + Modern Frameworks
Modern web development often blends jQuery with React, Vue, or native JS. We create hybrid applications where jQuery handles legacy interactive elements while newer code uses current frameworks for state management, component architecture, and complex user interface work.
jQuery isn’t dead. It runs the web. Our developers help companies keep that production code working, performing, and converting customers, without expensive rewrites that don’t change business outcomes.
— TESSA Marketing & Technology
Technical Skills Our jQuery Developers Bring
The best jQuery developers aren’t just people who memorized the API. They’re software development professionals with broad technical skills who understand when jQuery is the right tool, when it isn’t, and how to write code that holds up over time. Our screening process tests for both technical skills and problem solving skills.
Vanilla JavaScript Foundation
Every one of our developers has deep expertise in vanilla JavaScript. jQuery sits on top of native APIs, and the best jQuery developers know exactly which patterns can be replaced with native browser APIs and which still earn their place in the codebase.
HTML, CSS, and the DOM
jQuery exists primarily to simplify HTML document traversal and DOM manipulation. Our developers have strong HTML5 and CSS3 skills, understand the document object model deeply, and can choose the right HTML element for accessibility, semantics, and search engine optimization.
Performance Optimization
Effective jQuery development requires understanding performance trade-offs: minimizing DOM manipulation, caching jQuery selectors, using event delegation, and avoiding patterns that block the main thread. Our developers also focus on load testing, Core Web Vitals, and page speed budgets.
AJAX, APIs, and Backend Integration
Most production jQuery work involves AJAX requests, REST API integration, and async data handling. Our developers implement clean async patterns with proper error handling, whether the backend is in PHP, Node.js, or a microservices architecture in another tech stack.
Modern JavaScript Frameworks Familiarity
Even when we’re writing jQuery, we maintain expertise in current frameworks like React, Vue, Angular, and Svelte. That cross-framework experience makes our jQuery developers better at recommending the right architecture and at designing applications that can evolve over time.
Communication and Problem Solving
Technical skills are necessary but not sufficient. Our programmers also bring strong communication skills, problem solving skills, expert knowledge of business context, and a commitment to continuous learning. We hire developers who can explain technical decisions to non-technical stakeholders.
Our jQuery Development Process
Every TESSA engagement follows a clear development process designed to deliver predictable, high-quality outcomes. Our process emphasizes upfront planning, clear communication, and rigorous quality assurance. The process is the same whether we’re starting a new codebase or maintaining a decade-old jQuery one.
Step 1: Discovery and Scoping. Every project starts with discovery — understanding the business goals, the existing codebase (if there is one), the user interface requirements, and the timeline. We document the problem before we start coding. This step alone catches scope creep before it happens.
Step 2: Architecture and Planning. For projects of meaningful size, we plan the architecture before writing code: file organization, plugin boundaries, existing plugins to leverage, custom plugins to write, and integration points with the rest of the tech stack. Good architecture saves weeks of refactoring later.
Step 3: Development and Iteration. Our jQuery developers write code in small, reviewable chunks, with regular client check-ins so problems surface early. We use version control, peer code review, and continuous integration to maintain quality. Clients can follow progress as the work moves along.
Step 4: Testing and Quality Assurance. Every deliverable goes through cross browser testing on current browsers and any legacy browsers the project requires, speed checks against page load budgets, and accessibility validation. We test the things that break in production, not just the happy path.
Step 5: Deployment and Launch. When code is ready, we coordinate deployment with the client’s existing infrastructure: staging environments, DNS, CDN configuration, and monitoring setup. Launch should be uneventful, and it usually is.
Step 6: Post Launch Support. Every TESSA engagement includes post launch support to catch issues in the first weeks after deployment. We offer ongoing maintenance plans for clients who want a long-term partner. This is where many development company relationships fall apart, and where TESSA excels.
Why TESSA’s jQuery Developers Stand Out
There are many jQuery development companies. Most are either offshore staff augmentation shops or marketplaces matching freelancers to projects. TESSA is something different: a full-service digital marketing and technology agency where jQuery developers work alongside SEO specialists, designers, content strategists, and senior engineers. That breadth changes what we can deliver for our clients.
Extensive Experience Since 2012
TESSA has delivered production software for clients since 2012, over a decade of work, and our founders put in over nine years before that. Our extensive experience spans the full evolution of jQuery from version 1.x through current releases, plus the parallel rise of newer frameworks. We’ve seen what holds up over time.
Senior Team With Proven Track Records
Our team includes senior staff with proven track records on production codebases at scale. Every developer goes through our screening process before joining client work. We test for technical depth, communication ability, and the judgment to know when to deviate from “best practices.”
Cutting Edge Solutions When Appropriate
We don’t fetishize new technology, but we deliver cutting edge solutions when they’re the right answer. That means integrating machine learning into web applications, leading digital transformation projects that span websites and AI, and using modern tooling and architecture decisions that future-proof what we ship today.
Integrated Digital Marketing Capability
Most development companies write the code and walk away. TESSA combines jQuery development with SEO, content strategy, conversion rate optimization, and digital marketing, so the application we build also performs in search results and converts visitors into customers. See our SEO services.
No Hidden Costs, Clear Pricing
Our project quotes include everything: discovery, development, testing, deployment, and post launch support. No surprises. No surprise change orders for things that were always part of the quote. Companies that have been burned by overseas firms or freelance platforms appreciate the difference.
Strategic Partnership for Business Growth
The best client relationships are multi-year partnerships, not single transactions. Our jQuery development work often leads to broader engagements: design, application architecture, machine learning integration, and digital transformation roadmaps that drive long-term business growth.
Industries TESSA’s jQuery Developers Serve
jQuery’s ubiquity means our developers work across many industries. We have served clients in software and technology, manufacturing, healthcare, nonprofit organizations, government and education, e-commerce, professional services, and hospitality. Each industry has its own constraints (regulatory, speed, accessibility), and our team has the extensive experience to navigate them.
Our jQuery work spans interactive landing pages for marketing campaigns, complex web application interfaces for SaaS products, e-commerce checkout flows, custom plugins for content management systems, and integrations with third-party services. We also handle the front end development for clients whose backend teams have APIs ready but need experienced front end specialists to consume them.
The best jQuery developers know when not to use it. We’ve turned down projects because the right answer was a different approach or a different framework, and we’ve taken on jQuery projects that competitors said couldn’t be done.
— TESSA Marketing & Technology
Hire jQuery Experts From TESSA: How It Works
Companies that hire jQuery experts from TESSA typically engage us in one of four ways. Each model fits different business situations, and we’ll help you figure out which makes sense during the initial consultation.
Project-Based Engagement
For clearly defined work, such as a custom plugin, a new feature, or a speed fix, we deliver projects with set deliverables and timelines. This is the most common engagement model for companies that need specific jQuery work without committing to long-term retainers.
Ongoing Retainer
For companies whose application needs continuous development capacity (new features, ongoing maintenance, speed work, content updates), we offer monthly retainer engagements. These provide predictable cost, consistent team availability, and the deep product knowledge that comes from long-term work.
Staff Augmentation
When in-house teams need specific jQuery skills they don’t have on staff, we provide dedicated jQuery programmers who integrate directly with the client’s team: daily standups, the same tooling, joint code review. The client gets specialized capacity without hiring full-time.
Full-Service Web Agency
For companies that need jQuery development alongside design, SEO, content, and digital marketing, TESSA delivers all of it under one roof. This is where our agency model really earns its keep: one team, one accountable partner, no finger-pointing between vendors.
Every engagement starts with a free strategy session. We discuss the project, evaluate fit, walk through similar work we’ve done, and give you a clear proposal with pricing. Some clients want a risk free trial, a small initial engagement that proves the working relationship before committing to anything larger. We’re happy to structure engagements that way.
What Sets the Top jQuery Developers Apart
The market is full of developers who claim jQuery expertise. The top jQuery developers, the ones worth paying for, have a set of characteristics in common that go beyond knowing the API. These attributes are what separate real jQuery programmers from generic developers.
The best jQuery developers approach every problem as a software development problem first and a library-specific problem second. They understand programming languages broadly — JavaScript, PHP, Python, and increasingly TypeScript — and know how to integrate jQuery cleanly with whatever else the codebase uses. Developers who only know jQuery, without that broader software development foundation, struggle on real production projects.
A development company that genuinely invests in continuous learning produces dramatically better outcomes than one that doesn’t. Our developers spend time on it every week: reading new releases, exploring new front end patterns, evaluating new tools, and contributing back to open-source projects. Front end development changes constantly, and modern web development demands flexibility, so staying current is part of the job.
Seasoned developers also bring problem-solving judgment that comes from years of delivering solutions on real codebases. They know which patterns scale and which create bottlenecks. They know when to write custom code and when to use existing plugins. They can read other developers’ work quickly and understand why it was written that way, a critical skill when maintaining legacy applications.
At TESSA, our talented team includes both junior and senior developers, deliberately structured so junior developers learn from experienced ones. This is how we develop the next generation of top jQuery developers, and how we make sure project knowledge doesn’t depend on a single person’s availability. The developers we hire are the ones who can teach others what they know.
Every application our team ships is reviewed by senior developers before deployment. This peer review process catches the kinds of subtle bugs that plague jQuery applications: memory leaks from unbound events, performance issues from inefficient selectors, security gaps from improperly sanitized AJAX requests. Code review by experienced jQuery developers is the cheapest insurance you can buy.
Frequently Asked Questions About jQuery Development
Who developed jQuery?
jQuery was developed by John Resig and released in January 2006 at BarCamp NYC. Resig wrote jQuery to solve the cross-browser JavaScript compatibility problems that plagued web development in the mid-2000s, when Internet Explorer, Firefox, and other browsers each implemented JavaScript and DOM APIs differently.
jQuery is maintained by the jQuery Foundation (now part of the OpenJS Foundation), an open-source community of developers worldwide who continue to release security updates, bug fixes, and incremental improvements. The library is distributed under the permissive MIT License.
Does anyone use jQuery anymore?
Yes. According to W3Techs data from November 2026, jQuery is used by approximately 64% of all websites globally and holds roughly an 85% market share among sites that use any known JavaScript library. That makes jQuery still the most widely deployed JavaScript library in use by a significant margin.
Most of that usage is legacy code: sites created during jQuery’s peak (2010-2018) that continue to run on it because rewriting working production code in React or Vue is expensive and rarely justified by business outcomes. WordPress, which powers 39.3% of all websites as of November 2026 according to W3Techs, ships with jQuery by default, which alone accounts for a huge portion of that usage. New greenfield projects in 2026 typically choose modern frameworks, but existing jQuery codebases will be maintained for years to come.
Should we replace jQuery on our website?
Usually not all at once. The jQuery library still runs a large part of the web, and most work with it today is maintaining and improving existing code rather than replacing it. If your website runs on WordPress, which ships with the library by default, keeping it and improving the code around it is often the practical choice.
When a codebase genuinely needs to move toward React, Vue, or vanilla JavaScript, we plan a phased migration rather than a risky big-bang rewrite, with the existing library handling the legacy interactive elements while new features use a modern framework. We also upgrade older versions and remove deprecated APIs without breaking existing functionality.
Ready to Hire jQuery Developers From TESSA?
If your project needs jQuery development capacity, whether for maintenance of an existing codebase, new feature development, performance optimization, custom plugin work, or a strategic modernization path, TESSA’s jQuery developers can help.
The next step is a free consultation call. We’ll discuss your project, review your existing code if relevant, and give you a clear proposal: scope, timeline, pricing, and the team that would do the work. No pressure, no obligation, no sales pitch you have to sit through. Just a working conversation about whether we’re the right fit for your business.
What you get: A 30-minute call with TESSA senior leadership. Real technical advice you can act on whether or not you hire us.
What it costs: 30 minutes of your time.
Who it’s for: Engineering leaders, CTOs, marketing executives, and business owners evaluating jQuery development services, web development services, software development partners, or digital transformation work that touches their websites.
When it happens: We schedule strategy sessions quickly after your inquiry, and most clients move from that first conversation to a signed proposal soon after.
Book My Free Strategy Call or call 703-214-9555 to speak with someone immediately.
For more on TESSA’s broader technical capabilities, see our custom website development services, our SEO services, our software and technology case studies, and our AI agent readiness work for clients moving into the next generation of web technology.
