Yojji

Yojji is a custom software development agency headquartered in Warsaw, Poland, founded in 2018. The company employs 50 to 99 people, works at an average hourly rate of $40, and keeps its minimum project budget available on inquiry. It specializes in UI/UX design, mobile and web development, microservices, and cloud solutions, positioning itself as a partner for custom web and mobile products across any industry and budget. The agency also emphasizes access to top-tier talent tailored to each client's needs.

The agency's service categories include web development, eCommerce development, web design, software development, mobile app development, and business consulting. Engagement models cover custom product development, dedicated teams, and staff augmentation, letting clients scale engineering capacity or hand over full product ownership. Its development stack spans frontend frameworks such as React, Angular, Vue, Next.js, and Remix, languages including JavaScript, TypeScript, and Go, backend tools like Node.js, Express, NestJS, Postgres, and Mongo, and cloud platforms AWS, Google Cloud Platform, and Azure.

Representative portfolio work includes a Time Track System built in 2019, a Covid-19 Symptom Screening & Tracking platform for schools delivered over 30 months, a Payment system for entrepreneurs from scratch valued at $250K-$500K, a Workforce Management Solution, a cross-countries payroll solution for SMBs, Smart Health, a Social Network App, the ValaPay web platform, an eCommerce project for a Matter of Design, CSI Helsinki, and STB Union. Project budgets across the portfolio mostly range from $20K to $100K, with the largest engagements reaching $250K-$500K. Named clients include ValaPay, Payroll System, and Time Track System.

Client feedback on DesignRush gives Yojji 4.9 out of 5 across 21 verified reviews. Reviewers highlight delivered MVPs, more efficient and functional products, punctual delivery, and open communication through meetings, phone calls, and email. Several clients specifically call out the agency's low personnel turnover, senior-level developers and QAs, and a partnership-centric approach in which the team offers suggestions beyond the original scope.

The agency has served organizations of varied sizes, from startups under 49 employees to enterprises with 1,000-4,999 staff. Known client industries include hospital and healthcare, automotive, financial services, information technology and services, education management, computer software, and transportation. Clients describe Yojji as communicative, flexible, and responsive, with a stable team that integrates closely with internal stakeholders on long-running projects.