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TESIBY

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Bucharest, Romania
Senior engineers for SaaS, AI & custom software.
We’re a senior software development team building SaaS products, AI-powered applications and custom web platforms. We work with startups, established businesses and agencies that need an experienced technical team to take ownership of a product, a feature set or a difficult integration. Our core stack includes Laravel, PHP, Vue/Nuxt and modern cloud infrastructure. We handle architecture, backend and frontend development, APIs, third-party integrations, automation and AI-assisted workflows. We can join an existing codebase or build a focused product from scratch. We also build and run our own SaaS products, Contalys (AI accounting automation) and Grantium (EU funding applications), so we know what production software demands. We intentionally keep the team small and senior: direct communication, practical technical decisions and reliable delivery without unnecessary layers of account management.
4 people in their team
Speaks Romanian, English, Russian
6 projects in their portfolio
Works remotely across the globe
Sortlist member since 2026
Founded in 2024
Open website


Services

4 services offered by TESIBY

Service name
Experience level

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  • Description
    We build custom web applications for businesses that need more than a standard website. From SaaS products and internal platforms to complex business tools and AI-powered features, we handle the full development process — from technical planning and architecture to development, integrations and launch. Our team is made up of senior developers, so we focus on clean, scalable solutions that are easy to maintain and evolve as the product grows. Our core web stack includes Laravel, PHP and Vue/Nuxt, supported by modern APIs and cloud infrastructure.
    Skills in Web Application (8)
    Web ApplicationSaaSLaravelPHPVueJSWeb DevelopmentWeb Application DevelopmentAdmin dashboard
    Works in Web Application (5)
    AI operations assistant for a broadcast technology company - Web Application
    Contalys — AI accounting engine for Romanian firms - Web Application
    Live video operations software for a broadcast technology company - Web Application
    Grantium — AI platform for EU funding consultants - Web Application
    Reviews in Web Application (2)
    Sebastian Forsberg
    Gabriel Cernei
    Clients in Web Application (3)
    Confidential clientMedia | international
    ContalysAccounting | national
    GrantiumManagement Consulting | national

    Learn more about Web Application


  • Description
    We add practical AI capabilities to web products and business workflows. Our focus is not AI for the sake of AI, but features that remove manual work or make existing software more useful. Typical projects include document understanding and OCR workflows, structured data extraction, classification, AI-assisted back-office tools, LLM/API integrations, validation flows and automation around existing business systems. We integrate these capabilities into secure, maintainable web applications rather than treating AI as a standalone demo.
    Skills in Artificial Intelligence (6)
    Natural Language ProcessingArtificial IntelligenceDigital Process AutomationDocument DigitizationGenerative AILarge Language Models (LLM)
    Works in Artificial Intelligence (5)
    Contalys OCR — verification layer for AI document extraction - Artificial Intelligence
    AI operations assistant for a broadcast technology company - Artificial Intelligence
    Contalys — AI accounting engine for Romanian firms - Artificial Intelligence
    Grantium — AI platform for EU funding consultants - Artificial Intelligence
    Clients in Artificial Intelligence (3)
    ContalysAccounting | national
    Confidential clientMedia | international
    GrantiumManagement Consulting | national

    Learn more about Artificial Intelligence


  • Description
    We build custom software for businesses that need more than an off-the-shelf tool. This includes SaaS products, internal platforms, business applications, APIs, integrations and automation-heavy workflows. Our senior developers can take a product from technical planning and architecture through implementation and launch, or join an existing codebase to take ownership of a specific feature or technical area. We focus on maintainable architecture, clear communication and software that can evolve as the business grows.
    Skills in Software Development (8)
    SaaSSoftware ArchitectureSoftware DevelopmentBackend DevelopmentAPI DevelopmentCustom Software DevelopmentSystem Integration ServicesEnterprise Software Development
    Works in Software Development (6)
    Contalys OCR — verification layer for AI document extraction - Software Development
    AI operations assistant for a broadcast technology company - Software Development
    Contalys — AI accounting engine for Romanian firms - Software Development
    Live video operations software for a broadcast technology company - Software Development
    Clients in Software Development (2)
    ContalysAccounting | national
    Confidential clientMedia | international

    Learn more about Software Development


  • Description
    We help businesses keep existing websites and web applications reliable after launch. Our work includes ongoing maintenance, bug fixing, dependency and framework updates, performance improvements, hosting and deployment support, security-related fixes and incremental feature development. We can also take over existing projects, stabilize older codebases and provide senior technical support without the cost of building a full in-house development team.
    Skills in Website Administration (7)
    Web Hosting ManagementWebsite AdministrationLaravelWebsite OptimizationWebsite MaintenanceApplication ModernizationSoftware Maintenance and Support
    Works in Website Administration (3)
    Contalys — AI accounting engine for Romanian firms - Website Administration
    Live video operations software for a broadcast technology company - Website Administration
    Grantium — AI platform for EU funding consultants - Website Administration
    Clients in Website Administration (3)
    ContalysAccounting | national
    Confidential clientMedia | international
    GrantiumManagement Consulting | national

    Learn more about Website Administration

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Team

4 members in TESIBY's team

StoryTESIBY was founded by engineers with 7+ years each of building B2B platforms for international clients. Today we build our own AI-powered SaaS products and help companies and agencies turn operational problems into reliable software. Clients work directly with the engineers who build their product.
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Reviews

2 reviews for TESIBY

5/5
(2 reviews)
GC
Gabriel CerneiCEO at EVILDEV
ServiceWeb Application
5/5
Budget
Quality
Schedule
Collaboration

What was the objective behind your collaboration?We worked with TESIBY on a project for a foreign client. The project involved an online store for selling products and an AI-assisted customer support component. The goal was to integrate both parts into a solution suited to the client’s business.

What did you enjoy the most during your collaboration?We appreciated working with the same team on both the store and the AI support features. Having both parts covered within one collaboration was valuable for us. The focus on a practical business use for AI was particularly relevant to this project, and we would be happy to collaborate again.

Gabriel Cernei recommends this agency


ServiceWeb Application

SF
Sebastian ForsbergCEO at EVERSTONE
ServiceWeb Application
SectorOthers
Team1 - 10
5/5
Budget
Quality
Schedule
Collaboration

What was the objective behind your collaboration?We needed a reliable development partner to help us build and improve a custom web platform, including backend development, integrations and several complex product features. We had AI features including scanning and processing documents and create reports based on these. The goal was to move quickly while keeping the codebase scalable and maintainable.

What did you enjoy the most during your collaboration?What stood out most was the technical experience of the team and how easy they were to work with. Communication was direct, they understood the product quickly and they were proactive when it came to finding better technical solutions instead of simply following requirements blindly.

Are there any areas for improvements?As with most software projects, some requirements evolved along the way, so having even more detailed planning at the beginning could make future projects even smoother. Overall, the collaboration was very good.

Sebastian Forsberg recommends this agency


ServiceWeb Application
SectorOthers
Team1 - 10
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Contact

Contact details of TESIBY

Details



  • HeadquarterSplaiul Unirii, Bucharest, Romania