Top Custom Software Development Company

Build great custom
software solutions with
cross-functional team

Join 230+ CTOs and Product Owners who build their competitive advantage and grow their custom software applications with our teams

Services

With custom software development expertise in UX Design, Frontend and Backend implementations

our developers and designers can help you execute quickly and ship products faster. We specialize in designing, building, and maintaining distributed multi-tenant, secure, and robust custom software solutions.

Cost-effective
Development

We all speak English and work from one office. Our accessibility and strategic feedback ensure broadband communications, productivity and efficient delivery.

Cross-functional
Agile Team

We work in Scrum and have a sense of ownership. Designers and developers care about clients showing initiative and a proactive approach to problem-solving.

Technology
Expertise

Leverage the up-to-dateness of our technical skills, high-quality coding practices and expertise in making architectural decisions related to custom software development.

Quality

Client satisfaction

surveys reveal the average score for product and service quality in the last two years have been 85% and 90.2% respectively. We keep working to go beyond that.

I look for 5 key things in a software development partner: great programmers, consistent quality, excellent value, a responsive management team, and a fun experience. Selleo is a solid 5 out of 5 by my standards.

Myron WeberMyron WeberCEO at Northwood Advisors
Alyne GmbH is a Munich-based venture-backed B2B RegTech company providing SaaS software products in the domains of cyber security, risk management, and compliance. The solution is trusted by such industry-leading companies as Barclays, Allianz, Deloitte and solarisBank.
Manuel Reil
We wanted to augment our team, speed up the development process, and transfer knowledge. Selleo worked diligently to provide a solution that runs effectively. They produced a result that followed the specifics of a complex project.
Manuel Reil
CTO, Alyne, Germany
Speed-up and scale development process
Seeking expertise to ship complex features faster?
Speed-up and scale development process
Alyne needed software development expertise on improving the flexibility of the frameworks they use for SaaS products. Selleo provided expertise on improving the framework for a SaaS solution. This included providing insight on API and UI. They leveraged our skills and expertise to ship features faster and demonstrate their ability to execute.

Hire experienced custom software developers

Arkadiusz Janik
Arkadiusz Janik

Lead Designer

  • The head of design for several SaaS platforms delivered for global clients.
  • Responsible for the UX/UI part of a funding platform used by leading European investors.
  • Evangelist of modern web design with the mobile first approach.
Szymon Kieloch
Szymon Kieloch

Lead Developer

  • The architect of business process management application used by Fortune 500 companies
  • Augmented development of apps which were featured in Mashable, Forbs, TechCrunch, BusinessInsider
  • Maintained and governed RoR security app with 40+ mln users and optimized the SaaS platform functionalities speeding them up 3000 times.
Ireneusz Skrobiś
Ireneusz Skrobiś

Lead Developer

  • The Team Leader of several cloud-based and SaaS services, delivered for clients from 7 countries in Europe and America
  • Managed an augmented a team that developed web application which raised almost 2 mln USD in funding
  • A speaker and a mentor sharing Ruby on Rails best practices and helping developers boost their coding skills

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Years in business

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Designers & developers

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Software projects

Looking for experienced developers?

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