Manage application state using plain JavaScript, leveraging core language features and browser APIs.
JavaScript development services
Are you settling for average JavaScript developers? We aren't. We transform business challenges into real solutions with developers who raise the bar - ready to start in two weeks.
Trusted by startups and enterprises:
OUR SERVICES
Scale your projects with nearshore talent
Need skilled JavaScript developers? At ZenDev, we understand finding the right talent is challenging. Our experts work closely with you to deliver projects on time and within budget. Connect with top developers who can integrate with your team or fully own your project.
Here's how we can help:
Full-stack JavaScript development
Are clunky systems holding you back? We create end-to-end solutions that improve operations for businesses across industries like e-commerce, logistics, and healthcare. For Greenfee365, we didn't just build a booking platform; we delivered a 121% increase in order values and a 63% rise in bookings while streamlining their entire payment and management system.
Front-end development and optimization
Is your website losing potential customers due to slow performance? We rebuild e-commerce platforms using modern JavaScript frameworks to create fast, responsive experiences that drive conversions. For Arvid Nilsson, we rebuilt their e-commerce platform with custom APIs and integrations. The result? Processes that once took days now complete in minutes, with significantly improved site speed and data retrieval.
Enterprise JavaScript applications
We build custom, scalable JavaScript solutions that not only address your challenges, but also unlock new opportunities for your business. For Zynka, we developed a platform for managing and visualizing building infrastructure data. The solution was so successful it attracted investment to launch a new company around the platform.
BENEFITS
Why Choose ZenDev for your Javascript Development needs?
MORE THAN CODE
We build what matters
Technical expertise? We have it. But after eight years of building systems for Nordic businesses, we know what truly counts: solving the problems keeping you up at night.
This isn't about trendy frameworks or endless meetings. It's about results like:
- Transaction systems that handle millions in revenue while others struggle with basic loads
- E-commerce platforms where order values grew by 121%
- Data processes that used to take days now finishing in minutes
- A search platform, Foboko, processing millions of queries across seven languages without breaking a sweat
When business leaders come to us, they're tired of:
- Developers who can't see beyond their code
- Solutions that crack under real pressure
- Projects that drain budgets without delivering value
We fix that. Not with fancy presentations or empty promises, but with systems that:
- Actually solve your business problems
- Handle large transaction volumes with ease.
- Are designed to grow with your expanding business.
Here's the truth: you don't need more developers. You need a partner who understands what keeps your business running and knows how to fix it.
Ready for someone who gets it? Let's talk about what's really holding your business back.
TECHNOLOGIES WE USE
The Javascript tech stack we used in previous work
State Flow Management
Manage application state using plain JavaScript, leveraging core language features and browser APIs.
- Vanilla JavaScript
- Event Listeners
UI Design and Styling
Style user interfaces and create dynamic, responsive layouts using standard web technologies.
- CSS
- Media Queries
- DOM Manipulation
Routing and Navigation
Control client-side navigation and manage application URLs.
- History API
- Hash-based Routing
Form Management
Handle user input, validation, and submission of HTML forms with JavaScript.
- Vanilla Forms
- Validation
Data Handling
Retrieve, send, and manage data using JavaScript and standard data formats.
- Fetch API
- JSON
Testing and Debugging
Test, debug, and troubleshoot JavaScript code using browser tools and built-in functionalities.
- Console API
- Debugger
- Browser DevTools
Build and Deployment
Prepare JavaScript code and related assets for production deployment.
- Task Runners (Grunt, Gulp)
- Webpack
- Parcel
Globalization and Localization
Adapt applications for different languages, regions, and cultural conventions.
- Intl API
- Date Methods
Animation Framework
Create smooth and performant animations using JavaScript and related techniques.
- CSS Animations and Transitions
- RequestAnimationFrame
Authentication and Security
Implement client-side authentication and manage sensitive data securely.
- JWT
- LocalStorage/SessionStorage
Error Tracking and Debugging
Handle runtime errors gracefully and implement robust error tracking mechanisms.
- Error Handling
- Custom Error Objects
WORK MODELS
Tailored solutions for every Javascript project
PROCESS
Here is how we work together
-
Discovery call
We start with a discovery call to understand your goals, team dynamics, and project specifics. We're not just gathering requirements; we're challenging assumptions to ensure we deliver real results.
-
Team assembly
We carefully select top JavaScript developers to augment your team, create a dedicated team, or manage the full project. You'll work with developers who've solved similar challenges, eliminating the learning curve for your time and budget.
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Onboarding and integration
Our developers integrate with your team or take full project ownership. We provide clear, honest communication and address challenges directly, ensuring your project stays on track.
-
Project kickoff
After the project launch, we’re still your partner. We’re here to provide updates, implement new features, or handle fixes as needed. You get a reliable partner, not just a vendor.
TRANSPARENT PRICING, ENSURED SATISFACTION
Across all project types, we guarantee the utmost value for your investment
Dedicated
Junior Developer
From EUR 35/hour
2 Years of experience
Cost-effective talent
A great choice for budget-conscious projects that need quality support without the high cost.
Fresh perspective
Junior developers bring energy and new ideas, eager to tackle challenges and grow with your project.
Reliable support for routine tasks
Perfect for handling essential tasks, allowing your project to progress steadily.
Premium
Dedicated
Senior Developer
From EUR 55/hour
5+ Years of experience
Expertise for high-stakes projects
Ideal for complex projects needing advanced skills, strategic thinking, and a proactive approach.
Efficient and strategic solutions
Senior developers bring deep technical knowledge, ensuring efficient, high-quality solutions.
Seasoned stability
Rely on a developer with a strong track record to provide stability and guide the project through challenges.
Dedicated
Mid-Level Developer
From EUR 45/hour
3 - 5 Years of experience
Balanced expertise and value
Perfect for projects that need both experience and cost-efficiency.
Adaptability and problem-solving
Mid-level developers are skilled at tackling complex issues while quickly adapting to your project’s needs.
Consistent workflow
Achieve consistent progress with a skilled developer who ensures smooth operations.
OUR LEADERSHIP TEAM
With over 50 years of combined experience, we have a well-experienced team leading the way. Interested in collaborating? Don’t hesitate to reach out!
FAQ
What is JavaScript, and why is it so popular for development?
JavaScript is a versatile, high-level programming language known for its ability to create interactive and dynamic user experiences. It's widely used for front-end web development, back-end server-side development (Node.js), mobile app development (React Native), and more. JavaScript’s vast ecosystem of libraries and frameworks, along with its cross-browser compatibility, makes it a top choice for building modern, user-friendly applications.
What types of applications can you build with JavaScript?
We build everything from single-page applications to complex enterprise systems, including:
- Interactive single-page applications (SPAs) using React, Angular, and Vue.js.
- Scalable server-side applications and APIs using Node.js and Express.js.
- Cross-platform mobile apps with frameworks like React Native and Ionic.
- Dynamic and feature-rich web applications, including eCommerce platforms.
- Progressive Web Apps (PWAs) for a native-like mobile experience.
- Real-time dashboards and data visualization tools.
Why should I choose ZenDev for JavaScript development?
At ZenDev, we blend technical mastery with a deep understanding of your business goals. Our JavaScript experts excel at building custom solutions that solve real-world challenges, from enhancing user interfaces to building scalable back-end systems. We're committed to delivering quality work on time and within budget, while fostering seamless collaboration with your team.
What JavaScript frameworks do you use?
Our developers have experience with leading frameworks like React, Angular, and Vue.js for front-end development and Node.js and Express.js for the back-end. We use tools like npm for package management and integrate databases like MongoDB and PostgreSQL. We tailor our tech stack to meet your project's specific needs and requirements.
Can JavaScript be used for both front-end and back-end development?
Yes, JavaScript can be used for both front-end and back-end development using Node.js. This allows you to have full-stack JavaScript developers working on your project, creating cohesive and efficient applications. It also lets you reuse code and build applications faster.
Do you provide ongoing support after development?
Yes, we offer support and maintenance to keep your application running smoothly. From bug fixes to new features, we're here to help at every stage.
How do I hire a JavaScript developer through ZenDev?
Share your project requirements, and we'll provide a curated list of developers who match your needs. You can interview candidates to ensure the right fit.
Do you sign NDAs to protect my project and data?
Yes, we prioritize confidentiality and sign NDAs to protect your intellectual property.
CLIENTS ABOUT US
Tailored payment solutions and SEO services for a global Golf booking club
CLIENTS ABOUT US
From days to minutes: ZenDev’s impact on our e-commerce efficiency
CLIENTS ABOUT US
A platform for women to easily find the right therapist
CLIENTS ABOUT US
From missing insights on machine delivery to all data in one app
Outsourcing can be scary because you leave the development of one of your products to somebody else. With ZenDev we have always felt safe, throughout the entire process. They really are competent and take responsibility.
Patrik Bäckström
Lead Developer at Me Analytics
We feel that the team is careful and ambitious with the assignment and has taken on challenges with new technology choices and handovers to new consultants in a good way. At important milestones, both the team and those in charge at ZenDev worked hard for a safe delivery.
Freddy Ehrenholm
Product Manager at Srenity
From the first moment on, ZenDev has taken a big responsibility always to ensure quality in our collaboration.They created a dedicated team that acted as our IT department for Go Care and had our website as their only focus.
Fanny Falkenberg
Founder and co-owner of Go Care
Patrik Bäckström
Freddy Ehrenholm
Fanny Falkenberg
