Web Development
Services with JavaScript

Secure, scalable Back-End Development tailored to the highest Business Standards.

Stay ahead of the curve with our comprehensive Full-Stack Development Services.

Responsive, conversion-oriented, and visually striking Front-End Development.

We design and build industry-leading custom web products that meet your business goals and bring value to your customers.

Every pixel we craft is meticulously planned to ensure optimal performance, engagement, and scalability.

Secure, scalable Back-End Development tailored to the highest Business Standards.

Stay ahead of the curve with our comprehensive Full-Stack Development Services.

Responsive, conversion-oriented, and visually striking Front-End Development.

and recognitions


What our clients say

Anton CEO, Norby AI

“I’m really impressed with Lengin. They demonstrated a truly personable and client-centric approach. They were reliable and professional.”

Arkadii COO, Cyberland

“What I liked most about Lengin is that they didn’t just do assigned tasks but discovered new opportunities to improve the final product.”

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Keven Tech Lead, Modulos

“It’s hard to find a good front-end developer in terms of skills, high involvement, proactive, and communication well with the rest of the team is a bit tricky. We were lucky with Lengin.”

Dmytro Lead Engineer, NitroHire

“We collaborated with Lengin for over a year and achieved so much together. Their team was highly professional and a pleasure to work with.”

Natalie EIC, The Right Hairstyles

“Lengin delivered an impeccable website redesign, prioritizing speed and user experience. Their keen attention to our needs and innovative solutions garnered positive user feedback.”

Nick Founder, RevUp Dental

“After working with Lengin’s team, we were left really impressed to the point where we realized we didn’t need to hire a new developer directly.”

Alexis CEO & Founder, seniors@work

“I got exactly what I expected – the flexibility and not only one developer but, in the end, a team of different individuals.”

Natan CEO, Robusta Dev

“My number one concern was around quality, but the output speaks for itself. It’s more like a real partnership. It’s been almost two years, and you could’ve switched your engineer to another project with better profit, and it’d be best for you, but you didn’t!”

Shray Founder, OttoStory

“I went through a whole swath of different contractors, but you’re the most organized and have a strong team. I’ve enjoyed working with you.”

Paulo CTO, Neso Brands

You provide the most stable and reliable team. The work with you shows a good Return On Investment. Communication is almost real-time and devs are vey adaptive.

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Video Interview
Case portfolio:
Interview insights

Our web development services

“Any application that can be written in JavaScript will eventually be written in JavaScript.”
Jeff Atwood, founder of Stack Overflow


Front-end development

Enhance your web app user experience and visual appeal with our expert front-end development services. We create responsive and interactive interfaces that engage and delight users.


Back-end development

Ensure a solid foundation for your web app success with a robust and scalable back-end. We develop secure and efficient architecture on which your business can rely.


MVP development

Launch your Minimum Viable Product quickly and efficiently with our specialized development approach. We help you validate your idea, build a functional prototype, and gather user feedback to iterate and improve.


eCommerce development

Build a powerful online store that drives sales and delivers exceptional user experiences. Our eCommerce development solutions offer seamless payment integration, inventory management, and customizable features to maximize conversions.


PWA development

Harness the benefits of Progressive Web Applications to create fast, reliable, and engaging web solutions. We leverage modern web technologies to deliver offline capabilities, push notifications, and app-like experiences across devices.


Proven web development process

Delivering high-quality coding with agile methodologies tailored for business needs.

Analysis and Design
  • Define project requirements, conduct market research
  • Identify needed features, UX/UI design
  • Refine design based on user feedback, create wireframes
Application Development
  • Develop back-end infrastructure and databases
  • Implement front-end functionalities and features
  • Integrate necessary third-party services and APIs
Testing and Debugging
  • Conduct functional, compatibility, and load testing
  • Validate security measures, identify any bugs or issues
  • Debug and retest to ensure seamless performance
  • Deploy the app, and set up the production environment
  • Prepare detailed product guides and materials
  • Monitor initial application performance
Post-Launch Maintenance
  • Deployment and production environment setup
  • Optimize features based on user data and feedback
  • Monitor application performance and engagement
Schedule a free web development consultation

We are happy to answer all your questions!


Featured projects


Lengin in numbers

$ 500 m +

Has been raised
by our clients

100 +

5-star ranked Upwork

91 %

Of our projects
are long-term

30 +

Countries with satisfied clients

5 ★

Average Lengin rating of 150+
reviews on Clutch and Upwork


Of our clients were willing to refer Lengin


Client’s reviews

“Through effective communication, Lengin successfully designed and developed the client’s web app, implementing all the planned features on time and creating a seamless UX.”

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Vitaliy Malishchuk Tech Lead, SmartTek

“An exceptionally disciplined and highly-skilled team, Lengin delivered the project on time and within budget. The team utilized project management tools and communicated clearly and concisely, ensuring a seamless workflow.”

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Daniel Dramshev CEO, Netrocket

“Lengin has been working with the client for a long time now, and the client commends their high-quality performance. They impress the client with their motivation for work and ability to adapt to any situation.”

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Maayan Israeli Office Manager, Robusta

“The Lengin team helped the client improve the operational performance of the platform and built a user-friendly and responsive interface. They worked overtime to deliver everything on time and working properly despite several requested add-on features from the client.”

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Vasco Grieg CEO, OnHires

“Their team was highly communicative, responsive, and proactive, and the client was very pleased with their work.”

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Khomchenko Maksym COO, Wedex

“Lengin delivered a fully functioning site. The client was very satisfied with the deliverables and impressed with the partnership. The service provider’s team was flexible, professional, and communicative.”

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Max Dybenko CEO, IT-Outstaffing

“The project was successfully completed on time, and the team was very responsive to feedback. Lengin’s efforts were met with positive acclaim.”

Max Roodenburg
Max Roodenburg Marketer, De Klantenmachine

“Although the project is still ongoing, Lengin has made an impact on the project and has been quick in adapting to the client’s pace. Solutions, provided by Lengin saved us money and time”

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Stanislav Pavlov HR, Cyberland OÜ

“Lengin delivered the project, meeting the project’s requirements. Their exceptional communicative approach and the collaboration results impressed us.”

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Daniel Schacter President, CPM

“We had tight release deadlines with our stakeholders and urgently needed to find two full-stack developers. We initially tried to do it on our own but quickly realized it was taking too much time. Luckily, we were referred to Lengin, and they turned out to be a real lifesaver!”

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David Wenner Co-Founder, VocalReferences

“Lengin led a pixel-perfect implementation of the client’s designs. Their efforts resulted in a much more comprehensive site, allowing customers to better understand the client’s services. The team strictly adhered to the project’s timelines and managed to achieve every project milestone they set.”

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Mite Stojanov CTO, MyBlueLabel

“The client has been satisfied with Lengin’s ability to consistently deliver high-quality outputs. The products are always high-performing and only require minimal changes once reviewed.”

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Michael Wright Project Manager, Everbrave
View All Reviews

Frequently Asked Questions

What technologies do you specialize in for web development?

We specialize in developing tech solutions using JavaScript frameworks and libraries. However, we are versatile and can work with other technologies based on our client’s specific requirements and preferences.

Do you offer web app maintenance and support services?

Yes, we offer maintenance and support services to ensure your web app remains secure, up-to-date, and performs optimally. Our team can handle regular updates, bug fixes, security patches, and any required technical support.

Can you integrate third-party tools or systems into my web app?

We have experience integrating various third-party tools and systems such as payment gateways, customer relationship management (CRM) systems, content management systems (CMS), e-commerce platforms, and more.

Do you provide custom web development solutions?

Absolutely! We specialize in custom web development tailored to your unique business needs. Our experienced developers can create bespoke solutions that cater to your specific functionalities, design preferences, and scalability requirements.

Will my website be optimized for search engines?

We follow SEO best practices during the web development process to ensure your website is optimized for search engines. We implement proper HTML structure, meta tags, heading tags, and other on-page SEO elements to enhance your website’s visibility in search engine results.

Contact us

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    1 step Circle

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    2 step Circle

    We get to know you, your project, and the development requirements you have.

    3 step Circle

    We offer you the best-fit developers who can join your project in no time.

    Sales Manager at Lengin
    Tell us about your project

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      Project details
      Thank you for contacting us!

      We are already processing your request and will contact you within a day. Meanwhile, check out our Blog about software development, business, and insights.