Hire JavaScript Developers
JavaScript engineering expertise from a team trusted by 350+ businesses worldwide
Hire JavaScript developers to strengthen your team with full-stack web and mobile development expertise. Our engineers can build new functionality, modernize existing applications, and support ongoing product development. We match developers from our team to your technical requirements and adjust their involvement to your staffing needs.
JavaScript Developers for Hire
Hire JS developers from SysGears without spending additional time and resources on in-house vetting and recruitment. You can adjust the number of developers involved as your workload and staffing requirements change, dynamically balancing resources. Choose from three cooperation models (staff augmentation, dedicated team, outsourcing) and work with engineers whose working hours can overlap with your team across time zones, including CET, WET, and EST.
50,000+
developers all over the world trust our open
source contributions to Yarn Modern –
a JavaScript package manager
How We Select Our JavaScript Developers
Founded in 2010, SysGears has built its engineering culture based on hands-on project experience and evolving software development practices. Every developer who joins SysGears goes through a structured recruitment process. This means that when you hire JS developers from SysGears, their professional experience, along with their problem-solving abilities, technical knowledge, and communication skills, have already been evaluated before they join your project.
Strategic Talent Sourcing
We identify JavaScript specialists through professional referrals, established recruitment channels, as well as our internship and training programs. These sources help us find qualified engineers with relevant technical backgrounds for current and upcoming project needs.
Recruiter Interview
Our recruiters review the applicants’ previous experience and assess their communication skills, adaptability, motivation, and ability to work effectively within a development team.
Test Task
All applicants complete a practical assignment that allows us to evaluate how they apply software engineering principles to when solving a development problem.
Technical Interview
Senior SysGears engineers conduct an in-depth interview to assess relevant technical knowledge, understanding of software engineering practices, and the ability to reason through development problems.
Joining the Team
Only those who successfully complete all required stages receive an offer to join SysGears. Before working on client projects, new engineers complete onboarding and training on our internal engineering and delivery standards. Each developer then follows a Personal Development Plan (PDP) throughout their career with us, which is regularly reviewed and updated to support their continued professional development.
JavaScript Development Services We Provide
Web Development
Build and evolve full-stack web applications with React and Next.js on the frontend, and Node.js, Express, and NestJS on the backend. Hire JavaScript developers to implement user-facing functionality,
Cross-Platform Mobile Development
Develop cross-platform mobile applications with React Native and Expo. Our engineers can build new applications or extend existing ones, add mobile features, integrate backend services, and work with shared and platform-specific code where platform requirements differ.
Enterprise Application Development
Develop and extend enterprise applications using JS technologies across the frontend and backend. Our JavaScript experts can implement business workflows, role-based functionality, as well as application modules tailored to organization-specific processes and requirements.
API Development and Integration
Build and integrate REST and GraphQL APIs that connect applications with backend services and external systems. SysGears’ developers use Node.js with frameworks such as Express and NestJS, as well as GraphQL, to implement server-side logic, define API endpoints, integrate third-party services, and adapt existing API contracts as requirements change.
Software Modernization
Modernize existing JavaScript applications through dependency upgrades, JavaScript-to-TypeScript migration, code refactoring, and replacement of deprecated functionality. Our engineers account for the existing architecture, dependencies, and integrations when planning and carrying out modernization changes.
Support and Maintenance
Maintain existing applications through defect investigation and fixes, dependency updates, compatibility work, as well as performance and maintainability improvements. Our JavaScript programmers for hire can also implement incremental functionality as product requirements evolve.
What to Expect When You Hire JavaScript Developers
When you hire a JavaScript developer from SysGears, we match the engineer’s technical background to your project requirements. Their specific technical skills depend on their specialization and previous project experience. We continuously develop our engineers’ competencies through mentorship, knowledge sharing, code reviews, and ongoing training.
Key Hard Skills
Strong knowledge of modern JavaScript fundamentals and ECMAScript features
Experience with TypeScript for developing and maintaining typed applications
Proficiency with React and Next.js for web application development
Expertise in server-side development with Node.js, Express, and NestJS
Competence in asynchronous JavaScript, including Promises and async/await
Experience in building and integrating REST and GraphQL APIs
Expertise in application state management with Redux and Redux Toolkit (RTK), MobX, and React Context
Strong knowledge of relational and NoSQL databases, including PostgreSQL, MySQL, MongoDB, and DynamoDB
Competence in testing and debugging JavaScript applications with tools such as Jest, React Testing Library, Cypress, Mocha, and Puppeteer
Experience in cross-platform mobile development with React Native and Expo
Core Soft Skills
Analytical thinking for evaluating technical trade-offs and solving engineering problems
Communication skills for discussing requirements and technical decisions with project teams
Ownership of engineering outcomes, including proactively identifying potential issues and suggesting improvements
Adaptability when working with different architectures, technology stacks, as well as project requirements
Attention to detail during implementation, testing, and code review
Time management skills for maintaining consistent delivery across long-term projects
Software You Can Build With Our JavaScript Developers
SysGears’ JavaScript experts work on software for different platforms and business needs, from customer-facing products to internal systems.
Web and Mobile Solutions
- Web Applications, Including SPAs and PWAs
- Cross-Platform Mobile Applications
- Customer and Employee Portals
Business Management Systems
- SaaS Platforms
- Real-Time Communication and Collaboration Applications
- Media and Entertainment Software
Our JavaScript Development Technologies
Our JavaScript developers for hire work with a broad technology stack covering frontend and backend development, data management, testing, cloud platforms, UI implementation, and AI integrations. The technologies we use include:
Frontend Technologies
JavaScript
TypeScript
React
Next.js
React Native
Expo
Backend Technologies
JavaScript
TypeScript
Node.js
Express
NestJS
Apollo
GraphQL
State Management
Redux
Redux Toolkit (RTK)
MobX
React Context
Apollo GraphQL
Databases and Data Platforms
MySQL
PostgreSQL
MongoDB
DynamoDB
Firebase Firestore
Firebase Realtime Database
Redis
Supabase
Testing Tools
Jest
React Testing Library
Cypress
Enzyme
Mocha
Chai
Puppeteer
Cloud Technologies
AWS
GCP
Azure
Firebase
UI Frameworks
Material UI
Tailwind CSS
Ant Design
NativeBase
Tamagui
Gluestack
AI / ML
OpenAI APIs
Google Vertex AI
Whisper engine
LangChainAI
Vercel AI
How Our JavaScript Developers Maintain Code Quality
Our dedicated JavaScript developers follow established engineering practices throughout the entire development process to keep code maintainable and reduce the risk of issues introduced by software changes.
Coding practices
- Clear and consistent code structure
- Established coding conventions
- Modular code with clear responsibilities
- Dependency management along with regular updates
Code review
- Peer review of code changes
- Review for correctness, maintainability, and consistency with project requirements
- Review feedback on implementation decisions and potential improvements
Testing
- Unit, integration, and end-to-end testing based on project requirements
- Rerunning relevant tests after code changes to detect regressions
- Tools like Jest, React Testing Library, Cypress, Mocha, and Puppeteer
Quality checks
- Static code analysis, including linting
- Automated testing and code-quality checks in CI/CD workflows where applicable
- Performance checks where application requirements make them necessary
Need JavaScript expertise to grow your existing team or for a new development project? We can match you with SysGears developers based on your technical requirements.
Our JavaScript Development Experience
Our JavaScript programmers for hire have worked across diverse software products, industries, and technical environments. From building new web and cross-platform mobile applications to modernizing existing solutions and extending them with new functionality, our engineers have contributed throughout different stages of the software lifecycle. Explore selected projects to see the experience and technical breadth they can bring to your development team.
What Clients Say About Our Developers
“Konstantin did an amazing job setting up the infrastructure, and doing back-end work for our company. Everything was set-up with best practices and has been easy to maintain since the project completed.”
Joseph Corey
Founder, Subspace Networks, Inc.
“Roman is an excellent web front end engineer with expertise in React/Redux. He led the front end development for two projects over a six month period for us and transformed our front end architecture from plain javascript to the React framework. He was not only productive in delivering the requested functionality, but also diligently refactored his code to improve its structure. I will definitely bring him on my team for future development work.”
Eric Okimoto
Campaign Partners, Inc
“Evgeniy is a seasoned and well discipline senior software engineer. He worked well within our Scrum process and kept pushing my limits to keep up with him. He always exceeded my expected timelines for completing work. He was very good with both written and verbal communications (we met daily for standups and he wrote detailed API documentation). He contributed to architecture ideas as well as making suggestions to improve design and product. I can highly recommend Evgeniy for web development.”
Tom Setzer
Active Link
“Working with Alexey was fantastic. He doesn’t hesitate to make recommendations (and they’re always on point) and to hop on a call to discuss anything unclear. His daily recaps were always highly appreciated. He’s highly skilled, organized and proactive and we couldn’t have met successfully done this project it without him. Highly recommend!”
Marie-Claude Paquette
LittleBox
“We are very happy with Ruslan’s great work. He completed the task fully to our satisfaction and delivered results quickly. Thanks to his strong skills in Java and the Play Framework, he was able to understand our codebase quickly and solve all challenges effectively. Communication was friendly and professional throughout. Overall, a smooth and enjoyable collaboration. Highly recommended!”
Dominic Bruehwiller
insign gmbh
JavaScript Development Cooperation Models
Staff Augmentation
When you need to expand your existing development team or add JS expertise, you can opt for our JavaScript staff augmentation services to collaborate with one or more of our developers. Our engineers adapt to your established development processes and communication practices, with overlapping working hours available for regular syncs, progress tracking, and day-to-day collaboration.
Dedicated Team
If your project requires several developers contributing on an ongoing basis, you can hire dedicated JavaScript developers as a team focused on your project. Depending on your needs, the team can also include a lead who coordinates the developers’ work and communicates with your internal specialists and stakeholders.
Outsourcing
If you want SysGears to take responsibility for the entire software development process, you can outsource your project to us. We can bring together JavaScript developers, QA engineers, designers, and other specialists required to deliver your project, while your team remains involved in defining requirements, setting priorities, and making key project decisions.
Why Hire JS Developers From SysGears?
Full-Stack JavaScript Expertise
Our JavaScript expertise spans from React and Next.js on the frontend to Node.js, Express, and NestJS on the backend, covering all aspects of modern application development. Depending on their experience, our engineers can contribute across frontend and backend development, as well as cross-platform mobile development, within new and existing applications.
Open-Source Contributions
Our engineers have contributed extensively to open-source projects within the JavaScript ecosystem. Among them are Apollo Universal Starter Kit, Create Apollo App, and Yarn. Through this work, our engineers gain practical experience collaborating on publicly maintained software projects.
Consistent Engineering Standards
Our developers follow time-tested quality management practices that cover code reviews, testing, and knowledge sharing. These company-wide standards provide a consistent engineering framework for developers contributing to existing projects as well as new ones.
Continuous Developer Growth
We continue developing our engineers’ technical and professional skills after they join SysGears. Personal Development Plans, mentorship, knowledge-sharing activities, and ongoing training help developers expand their competencies and keep their knowledge relevant to the projects they work on.
Security-Oriented Development
We incorporate security practices into software development based on each project’s requirements. These can include secure coding practices, access controls, and encryption of data in transit and at rest, with implementation informed by OWASP security guidelines.
Transparent Collaboration
Our JavaScript programmers for hire collaborate directly with client teams through established communication and delivery processes. Regular progress updates, planning sessions, demos, and feedback help keep ongoing work and technical decisions visible to project stakeholders.
How to Hire JavaScript Developers with SysGears
Discuss Your JavaScript Requirements
First, we discuss how many developers you need, their expected responsibilities, required JavaScript expertise, and preferred start date. We also review your current or intended technology stack and team setup to identify the best roles for our developers to fill. If the project involves confidential information, we can sign an NDA before details are revealed. You can reach us through our website form, live chat, or at info@sysgears.com.
Define the Cooperation Setup
Based on your staffing needs, we agree on a cooperation model and the required level of developer involvement. If those needs change, we can adjust the team setup accordingly.
Review and Select Developers
At SysGears, we shortlist available JavaScript developers for hire based on the technical requirements and responsibilities of the role. You can review their CVs, interview the proposed developers, and select the candidates you consider the best fit for your team.
Integrate Developers into Your Team
After selection, our JavaScript experts get acquainted with the project’s technical context, their responsibilities, and your team’s development and communication workflows. The exact onboarding process can follow the practices already established within your team.
Manage the Ongoing Cooperation
During the cooperation, our partner success manager collects your feedback and helps address staffing and collaboration matters. If your needs change, we can discuss scaling the team up or down.
Tell us what JavaScript expertise your team needs, and onboard the right developers from SysGears.
Hire Developers by JavaScript Technology
Looking for expertise in a specific part of the JavaScript ecosystem? Explore our related developer hiring services:
Hire React Developers — for React-based web application development
Hire React Native Developers — for cross-platform mobile development
Hire Node.js Developers — for server-side JavaScript development
Hire Next.js Developers — for Next.js web application development
Hire TypeScript Developers — for typed JavaScript application development
FAQ
How do I know what type of JavaScript developer my project needs?
Start with the work the developer will be responsible for in your project. Frontend web engineers primarily work on client-side application logic and user interfaces, while server-side JavaScript specialists handle application logic, APIs, and data access in environments such as Node.js. If the role involves both client- and server-side development, a full-stack JavaScript developer may be the better fit. At SysGears, we assess your project requirements, planned or existing technology stack, and team composition to determine which JavaScript skills and level of specialization you need.
Should I hire a JavaScript generalist or a framework specialist?
A JavaScript generalist can be a good fit when the role spans multiple parts of the application or requires working across several JavaScript technologies. A specialist, though, may be more appropriate when the work depends heavily on a particular technology, such as React, Next.js, Node.js, or NestJS, or involves technology-specific architecture, performance, or migration challenges. We match the developer’s specialization to your codebase, project scope, and the responsibilities they will take on instead of treating experience with different JavaScript technologies as interchangeable.
What do I get from hiring a dedicated JavaScript developer from SysGears compared with a freelancer?
Our dedicated JavaScript developers works directly with your team while remaining part of SysGears. This means the developer can draw on support from our wider engineering team, while we take care of their professional development and other employment-related matters. If your project needs change, we can also discuss adding specialists with the required expertise or replacing a developer if their availability changes.
Our engineers continue developing their technical and professional skills through internal learning, mentorship, and knowledge sharing. This helps them expand the expertise they bring to your project.
With an independent freelancer, these responsibilities typically depend on one person. With SysGears, you work directly with the assigned developer while also having the support of a software development company behind the cooperation.
How do you select JavaScript developers for my project?
Before assigning a JavaScript expert to your project, we review their experience against your technical requirements, expected responsibilities, and existing or planned technology stack. This includes checking their experience with similar engineering tasks and the JavaScript technologies required for the role. You can then review the proposed developers’ experience and interview them before making a final selection.
Can I hire JavaScript developers for a short-term project or temporary capacity gap?
Yes. You can hire JavaScript developers for a limited period when your team needs additional engineering capacity without making a long-term staffing commitment. This can work for situations such as a release with a fixed deadline, a temporary increase in the development workload, or additional support during a migration. At SysGears, we adjust developer involvement based on the scope, workload, and duration of your staffing need.
How much does it cost to hire a JavaScript developer?
The cost of hiring a JavaScript developer depends on the engineer’s experience level, required technical expertise, and level of involvement. As a general benchmark, European software vendors working on an hourly basis, SysGears among them, typically charge from $35 to $80 per hour for software development services. After reviewing your requirements, we provide a tailored rate and recommend an engagement setup based on your project needs.
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