End-to-end software development

We help ambitious organisations turn complexity into clarity with digital products that scale, adapt and endure. Our teams deliver custom software solutions that create measurable value today and evolve for tomorrow, combining business insight with technical excellence to achieve sustainable long-term success.

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Mobile App Development

We design mobile applications that are intuitive, reliable and built for the long term, from standalone products to IoT companions and more, always aligned with your business goals.
- Kotlin
- Swift
- React Native
- Expo
Mobile App Development
Web Development

Our web applications go beyond static sites, delivering responsive, secure platforms such as dashboards, portals and data-heavy systems that scale with your product and your users.
- Next.js
- Angular
- NestJS
- FastAPI
Web Development
Iot & Cloud Solutions

Connected devices, cloud-native platforms, self-hosted solutions, you name it; we build secure, scalable systems that connect physical products to digital infrastructure, delivering efficiency, insight and long-term resilience.
- AWS
- Microsoft Azure
- Terraform
- Kubernetes
Iot & Cloud Solutions
AI & Machine Learning

We integrate AI where it makes a difference, applying predictive analytics, recommendation engines and automation to create smarter products and measurable business outcomes.
- Python
- LangChain
- Pandas
- TensorFlow
AI & Machine Learning
Product Development

Starting from raw concepts through launch and beyond, we support the full product journey with discovery workshops, lean MVP builds and long-term development that prioritises scalability and user experience.
- MVP Development
- Discovery Workshops
Product Development
Team Augmentation

Scale fast with vetted engineers and technical leads who embed directly into your workflows, strengthening your team’s capacity, knowledge and delivery without long hiring cycles.
- Engineers On-Demand
- Dedicated Teams
Team Augmentation

About us

150 clients

trusting our work
50 experts

in our team
9 countries

we are active in
15 years

on the market

Since 2010, we have grown from Poland to world-wide delivery, earning recognition from industry leaders like Deloitte and Clutch. Our story is one of steady growth, trusted partnerships and a commitment to purposeful software that adapts to tomorrow’s challenges.

Get to know us

Industries

PropTech

Real estate and property management companies modernise operations, improve energy performance and integrate smart building tech with DO OK. We connect devices, unify building data and enable ESG reporting for more efficient, transparent, future-ready property management.

BEHA – Smart heaters with remote management

BEHA, a Norwegian leader in heating solutions, partnered with DO OK to develop a comprehensive platform for remote heater management, including a robust mobile application and a backend system.

Health & Wellbeing

We design digital health platforms that empower users while protecting data privacy and building trust. For everything from wellbeing apps to telemedicine and data management systems, our solutions blend rigorous compliance with engaging experiences that improve lives and support healthcare providers.

Optima Sport – Athletic recovery with remote-controlled boots

Optima Sport, dedicated to advancing athletic recovery, partnered with DO OK to address a critical need: their top-tier Recovery Boots were paired with software that didn’t fully meet user expectations.

Insurance

Efficiency and loyalty in the insurance industry depend on modern, data-driven platforms. We deliver solutions that streamline claims, personalise offerings and keep policyholders engaged, all while aligning with GDPR and ISO standards across diverse European markets.

EdTech

Education technology is evolving fast, and we build tools that make learning more accessible, interactive and measurable. Our scalable platforms support adaptive learning, gamified experiences and safe, ethical AI-driven personalisation to keep students engaged and teachers empowered.

YOLI – Innovative IoT and AI educational games

YOLI consistently seeks innovative methods to captivate children’s interest, striving to develop games that engage children in learning while accommodating individual learning needs.

Logistics

Supply chains rely on transparency, efficiency and trust. DO OK develops platforms for asset tracking, fleet optimisation and ESG reporting that connect data across silos, helping carriers, shippers and operators make smarter decisions with real-time insights.

Versa – Smart IoT tracking solution

Versa is the next level of baggage service: a complete real-time luggage tracking solution at your disposal.

IoT

Connected devices are transforming industries from manufacturing to healthcare. We design IoT platforms that deliver insights, automation and cost control, balancing edge and cloud to match business priorities and scale effectively.

Fell Tech – Intelligent infrastructure for safety, energy efficiency and sustainable living

Fell Tech specialises in wireless and IoT safety and security solutions, bringing smart technology to industries such as home & building, marine and energy.

Other

Our expertise extends beyond core sectors, with successful projects across a wide variety of legacy and emerging industries. We apply proven technical capabilities to new domains quickly, adapting to specific regulations, user needs and market contexts.

FakeHunter

For The Polish Press Agency and The Ministry of Digitization, we developed a tool for monitoring fake news about the coronavirus on the web.

Our clients say it best!

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What impressed me the most about DO OK is their clear focus on the quality of the human resources they provide. DO OK thoroughly verifies the competencies of their specialists and ensures they match the required skill sets. The profiles of the specialists they propose are well-aligned with the appropriate seniority levels, and there’s never any doubt that the specialist assigned to the task is fully qualified for the job.

Agnieszka Uznańska

Head of Delivery, itCraft

We’ve used some specific backend technologies and I’ve been impressed by their ability to get up-to-speed with those. DO OK was also capable of suggesting immediate improvements. “We liked their eagerness and proactiveness on tracking the various issues we had.

Harrit A. Kingma

Founder, Catch-up

We have collaboration with dook.pro on and off for a couple of years and their understanding of our domain has built up over time. Coupled with their flexibility and the skill of their developers, were are able to accelerate the development of our platform.

John Macpherson

CEO, BMLL

To me, DO OK’s greatest strengths were their extreme professionalism and understanding of our social mission.

Maria Schindler

Product Owner, The Exempt From Theory Foundation

They were super-fast in adopting our planning and added value to our project within hours!! Super Awesome job.

Markus Waghubinger

CEO, halloSophia

Our application was not working optimally, it was unstable and not connecting to wi-fi as intended. DO OK presented a team which in their opinion would not only meet our needs for development, but also budget restrictions. Throughout the project, DO OK has been an extension of our in-house department and far more than a supplier.

Mette Elizabeth Rud Olafsen

Product Manager, BEHA

This was a great approach for proof of concept built with an agile mindset by DO OK.

Remi Caron

Concept Creator, Toba

Communication was strong, and DO OK was always very responsive. Their independence and agility were a good fit for both projects, and their cost and time estimates came very close to reality. Their developers are highly skilled and professional.

Ulyana Yasinovska

Account Manager, EL Passion

DO OK has a fantastic startup understanding and that is why we love to work with them. As a small startup, we are very dependent on partners and DO OK deliver what they promise.

Niklas Marschall

Co-founder, Yoli