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Custom web app development services

Maspex logo
Kontomierz logo
Prospector logo
Future Collars logo
We are your tech partner

The power of web

Web browser has never been more powerful. They offer the fastest signup path and the lowest customer acquisition costs, allow us to quickly test the MVPs, and offer great solutions working on all screens.

What is your digital strategy?

New venture

Are you building a new venture based on the web interface? We can offer a complex service starting from UX design and customer interviews through development and maintenance services. Our custom solutions are based on low-code technology, which guarantees a short time to market and affordable budgets. Your future portal could be easily integrated with all kinds of social media logins, payments systems, chats, and chatbots and can support notifications and ticketing systems.

Management tool

If you want to build custom web applications that digitalize existing business processes, we can help you integrate this new solution with your infrastructure and user management system. We support all SSO services and have experience in integrating with enterprise-grade systems like SAP, MS Dynamics and others.

New SaaS product

We can help you to offer your new services by building a web portal where user can easily log in, also with their social media accounts, manage their product, order a subscription with a free trial period and different payment methods, manage their users, and grant different level of permissions depending on a selected plan.

Migration of an existing web portal

Is your business dependent on existing legacy software? This can limit the implementation of the new features or even put your entire business at risk. In both cases, you should consider engaging a new software provider who could run an audit and assessment of the existing web portal and its infrastructure and help you build a roadmap of migration that will meet your business priorities.

What is included in Web App Development Services?

We start with the discovery process, where we learn about your business and its priorities. Then, we transfer them into the working product. This is why we provide the full range of optional services to build the web portal from 0 to 1. 
Design Thinking Workshops
UX/UI Design
Low/Hi-Fidelity Mockups
Clickable prototype
Research and User Interviews
Agile Coaching
Backlog Management
Web Portal Development
Quality Assurance 
Automated tests 
Release management
Support and SLA

What sets us apart from other agencies?



While many agencies primarily provide you with developers, we go a step further by taking full ownership of your projects.


Short time to market

We don’t reinvent the wheel from scratch but leverage proven components and solutions that save development time.


Experience from 60+ apps

You get the assurance of working with a highly skilled team that builds top-tier mobile apps, resulting in 5-star client reviews.


Automated tests

Forget regression bugs. Our robots make sure that everything is okay, so that you don’t need to. This means higher overall app quality.


Agile culture

We embrace Agile with Scrum as our default, but we also do Scrumban and Kanban. You gain the advantage of an adaptive approach to project management.


On time and budget

Our managers constantly monitor the projects to ensure they are delivered on agreed-upon time and budget, providing a predictable project experience.


We are on the tech edge

We closely monitor the new technologies and solutions to build state-of-the-art applications and software.


Your tech partner

We are taking responsibility for the tech side of the project and recommend solutions that fit your business needs.



Transparency in the way of project management and access to our project tracking tools. It promotes collaboration and contributes to the overall success.

Examples of our custom web apps

Case Study of Maspex ContentBox
Maspex ContentBox logo
Mobile & Web Application

Maspex ContentBox

Case Study of Prospector App
Prospector logo
Web Application


Case Study of Kontomierz app
Kontomierz logo
Web Application


Reviews of our work

Maspex logo

We’ve selected LeanCode because they offered us a great analysis of our needs and helped to structure them as a product. LeanCode was reliable in the maintenance phase and product delivery. They were helpful, responsive and provided constant communication for the progress. Moreover, they met the expected output.

Agnieszka Czura
Agnieszka CzuraInnovation Project ManagerMaspex
Prospector logo

The team not only delivered what we needed, but they improved on what we wanted as well. The new platform is a significant advantage to our sales. I have worked with many IT teams developing software for over 30 years. This team is top grade.

Brent Jackson
Brent JacksonOwnerIRD Group
Kontomierz logo

Working with LeanCode is at a very high level! LeanCode has skillfully delivered the project as per the client's requirements. The service provider ensures effective and productive communication through meetings, interviews, and email. Their commitment, project management, availability, and supportive approach are key elements of their work.

Marzena Wójcik
Marzena WójcikProduct OwnerFinelf.com

How can you start with custom Web App Development?

Related services

Meet our expert

Let’s talk about your new web app project!

Łukasz Kosman, CEO LeanCode

During our first interview, we will discuss your vision for the web app or web portal, current resources, and how we can be helpful. We will inform you about the potential budget and timeline. 

Łukasz KosmanCEO at LeanCode


How much does it cost to build a web application? 

How long it takes to build an MVP? 

How about no/low-code solutions?

What happens after an app is completed? What if there are some further issues? 

I have a Proof of Concept app built in a low-code solution. Can we use that? 

I have a web portal, but it has some tech debt. Can we fix that?