Krononsoft

Krononsoft is a Polish software development company founded over 11 years ago with approximately 65 clients across their tenure. The company emphasizes a high-seniority team: 86% senior developers, 72% of whom are long-term employees (suggesting stability), and reports a 91% client retention rate. They specialize in custom software development, web and mobile applications, legacy modernization, and consulting.

The outfit works primarily with startups, SMBs, and established companies across e-commerce, real estate, travel, sports, and business automation. Their client roster includes MontiPlanet (e-commerce platform expansion), Tackle Group Europe (warehouse automation), BahamaGo (tourism booking platform, 8-year partnership), Plei Inc. (sports platform), Edit Suits Co., and Zuhda App (real estate).

Services and capabilities

Krononsoft splits its offerings into five main categories. Web development covers custom web applications (SaaS platforms, booking systems, operational dashboards), technical consulting and project planning, business process tools, and app maintenance. They deliver mobile applications with "advanced features" for iOS and Android, handle legacy app modernization (code refactoring, database cleanup, performance optimization, security hardening), offer microservices consulting for monolith-to-microservices transitions, and take on project rescue and continuation work.

Their technical stack includes Ruby on Rails, Node.js, Nest.js, PostgreSQL, React, TypeScript, and integrations with payment systems, CRMs, and third-party APIs. Frontend builds are responsive and multi-device. They work in iterative cycles, shipping working versions weekly to clients for feedback and course-correction.

For legacy modernization specifically, they perform independent code audits, clean and migrate databases, optimize performance through deep analysis, and conduct modernization consulting. Their case: Kidiyo required a full technical rebuild moving from an outdated stack to Unity-based architecture for "gameplay, performance, and scalability needs." Luxury Therapist's app was rebuilt on PostgreSQL + Node.js/Nest.js "within weeks, not months." They claim to support "most mainstream tech" and avoid unnecessary rewrites; if the existing stack can be optimized, they'll argue for that first.

Notable work

Tackle Group Europe built a warehouse automation system integrated with e-commerce and inventory tools. MontiPlanet received an SEO-optimized e-commerce platform to expand into the U.S. market with "high performance, and a scalable architecture." BahamaGo's tourism booking platform launched in 2012 and has been described by its founder as "a stable solution with constantly expanding functionality"; Krononsoft modernized the legacy Ruby on Rails codebase, refactored it, and integrated APIs and payment workflows.

Plei Inc. has partnered with Krononsoft for 8 years; the company helped scale the platform "to support tens of thousands of users across multiple cities" and continually expanded features. Kidiyo's legacy children's learning app was modernized from an outdated architecture to a faster, safer system. Luxury Therapist's unfinished marketplace integration was revived and rebuilt.

How they work

The methodology follows a three-step cycle: Understanding Your Vision (initial discovery), Iterative Development Process (engineers add features weekly; clients receive a working build every week for feedback), and Continuous Growth and Improvement (post-launch enhancement and scaling). Pricing is not disclosed on the website; they offer free consultations and estimates. Communication appears to be direct and non-hierarchical—clients mention team leads "breaking things down and explaining clearly" and weekly check-ins. Engagement appears to support both full project delivery and ongoing maintenance.

Team and credentials

No founders are named in the source material. Team composition: 86% senior developers, 72% long-term employees. Total headcount is not disclosed, though they mention 65+ happy clients over 11+ years. The company does not mention ISO 27001, SOC 2, GDPR, HIPAA, or cloud partnerships (AWS, Google, Microsoft, Shopify). No Clutch, G2, or third-party ratings appear in the source. They do list testimonials on their website and reference a Clutch profile in passing ("See more about what our clients are saying on Clutch"), but specific review counts and scores are absent from the provided material.