Web Development
We build web applications that are scalable, efficient and tailored to complex business needs. Our teams turn ideas into secure, user-friendly platforms that perform under pressure and grow with your product.
Seamless performance, infinite possibilities
Our team builds responsive, interactive applications that support real-time data handling, third-party integrations and sophisticated workflows. We support every stage of the development process, beginning with architecture planning and crafting UI, all the way to writing clean, maintainable code.
Our clients rely on us to modernise legacy systems, improve usability or launch entirely new platforms. We align every build with your business goals, so that what we deliver is both technically solid and purpose-driven. Between customer-facing dashboards, internal admin tools, data-heavy interfaces and more, DO OK helps you get there with speed, precision and attention to every detail, no matter how small.
Solutions
We design and build interactive web applications that solve real problems and adapt easily to future needs.
Custom Web App Development
We design and deliver tailored platforms for internal dashboards, custom tooling, customer portals and full-scale digital products, built to meet specific business requirements. Our team provides end-to-end development support, so that each solution is fully aligned with your operational and technical needs.
Progressive Web Apps (PWAs)
PWAs offer an alternative to mobile-native apps with features like offline access, installability and rapid load times. We build PWAs that expand accessibility, especially for users in bandwidth-constrained environments, and help businesses extend their reach without duplicating development across platforms.
Front-End Development (Responsive UI)
DO OK develops responsive, accessible front-end interfaces that adapt smoothly across devices and screen sizes. Our team focuses on performance, usability and maintainability, so that the visual layer of your application supports your product goals and brand. Every interface is built for ease of use, speed and long-term consistency.
Backend & API Development
We build scalable backend systems and robust APIs that power core functionalities, including everything from business logic and authentication to integrations and performance monitoring. Our solutions are designed to support long-term growth, maintain security and keep your data flowing efficiently across platforms and users.
Real-Time Dashboards & Data Visualisation
Our teams create interactive dashboards and visualisation tools that surface live data clearly and accurately. These tools help teams monitor performance, detect anomalies and act fast in data-rich environments. Each dashboard is designed for usability, performance and the specific metrics that matter to your business.
React
Next.js
Angular
FastAPI
Python
Vue.js
TailwindCSS
NestJS
Node.js
PostgreSQL
Antdesign
RESTful API
Chakra UI
Express.js
Flask
GraphQL
Material UI
MongoDB
MySQL
OpenAPI
Redis
Swagger
Web Components
Docker
Why DO OK?
Tightly Aligned Delivery Process
We treat planning as a foundation for trust. Our delivery process starts with structured discovery, realistic timelines, defined responsibilities and full alignment on business objectives. This prevents scope creep, reduces risk and keeps everyone on the same page from the very beginning.
Business-Oriented Thinking
Technical decisions are always tied to business impact. Every feature is designed to support your operations and scale with users. This includes hosting setup, whether on cloud, bare metal or on-premise, so that performance, compliance and cost align with your long-term strategy, not someone else’s defaults.
Seamless Integrations
We build web applications designed to work within your broader tech environment, creating stable, secure and maintainable integrations for solutions such as payment systems, CRMs, maps, analytics or internal APIs. Your platform will connect smoothly with the tools your team and users already rely on.
Reliable Long-Term Support
Our work doesn’t stop after version 1 ships. DO OK provides proactive support, performance improvements and roadmap input long after release. Clients rely on us as a steady technical partner, one that sticks around, scales with you and cares about the product’s long-term health.
Client Testimonials
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We have been comparing the offers of 7 companies and selected DO OK, as the reviews of the projects they have completed were positive, and their vision of implementation of the project was close to our expectations. DO OK is willing to undertake any challenge we might encounter in the project and provide full support. Our web app was produced in short terms and fully relevant to the user story. The task was challenging, so the vendors we previously worked with either refused to attempt the project or could not deliver the product within the defined time limit.
Olga Miciak
- Project Manager, Translavic
Ready to build your platform?
From data-heavy dashboards to responsive customer portals, we design and develop secure, scalable web applications that integrate smoothly with your systems and grow with your business.
Frequently asked questions
How long does it take to build a custom web app?
A basic MVP typically takes between 8 and 12 weeks, depending on design depth, integrations and backend complexity. For more advanced products, we recommend phased delivery tied to clear milestones. We start by defining a critical path to launch, so you can release something valuable early and iterate based on real user input.
How do you handle security and scalability?
We design applications with security and scalability built in from the start. That means using best practices like access control, data validation and secure deployment pipelines. Scalability is addressed through modular backend design, smart caching and infrastructure planning to make sure your app performs well as demand increases.
Do I need to provide full specs before starting?
No, detailed specifications aren’t necessarily required. We work with many clients who come in with only a high-level idea. Through discovery workshops and technical consultation, we help define user stories, technical scope, and delivery phases, giving you clarity and direction without needing everything documented upfront.
Can you modernise my existing web app?
Yes. We take on legacy platforms that need updating without losing core functionality. Our team can refactor codebases, replace outdated frameworks, and improve speed, usability, and maintainability. We ensure the upgraded system fits modern standards while continuing to serve your business and users reliably.
What’s the difference between a web app and a PWA?
A web app runs in the browser and typically requires an internet connection. A PWA is a more advanced form of web app that can also work offline, send push notifications and be installed on a user’s device. It bridges the gap between web and native apps, offering extended reach and engagement.
Do you offer post-launch support and feature development?
Yes. DO OK provides long-term support options after release, including feature iteration, bug resolution, performance tuning and architectural scaling. Our clients often stay with us as their product evolves, and we structure our delivery model to support growth, shifting priorities and technical consistency over time.
How do we communicate during the project?
We set up a shared Slack/Teams channel, weekly standups, and a standing review call. You’ll have direct access to the team and real-time progress boards.
Do you provide post-launch support?
Yes. We offer support and maintenance plans with SLAs, monitoring, security updates, performance tuning, and a roadmap for ongoing improvements.
