I specialize in custom development: creating websites, web applications, mobile applications, desktop programs, and business software modules (CRM, ERP, etc.) tailored to specific customer needs, and I also provide consulting and audit services.
Each service is more than just code writing; it's a solution to a specific business problem, taking into account industry specifics, scalability, and the legal requirements of France and the European Union. I will be your digital transformation partner, not just a technical contractor.

  • DEVELOPMENT OF WEB APPLICATIONS AND SITES

    Full cycle: from technical specifications to launch and support
    Integrations: I connect to your current systems and services
    Responsiveness: Perfect display on all devices
    Performance: Optimized loading speed
    Security: Data protection and compliance

  • DESKTOP APPLICATIONS


    Accounting and reporting systems: Automation of accounting, inventory control, and production
    Specialized editors: For design, engineering, and data processing in specific niches
    Integration gateways: On-premises software for connecting legacy systems with modern cloud services

  • MOBILE DEVELOPMENT


    From prototype to publication: Full cycle – from design to placement in the App Store/Google Play
    Integration: The app becomes part of your ecosystem
    Analytics: I integrate data collection systems to analyze user behavior
    Security: Data protection, compliance with app store policies

  • CONSULTING AND AUDIT


    A clear report with a straightforward list of issues and priorities
    A step-by-step improvement plan with estimated timelines and budgets
    Technology recommendations without pushing unnecessary changes
    Expert risk assessment before major IT investments.

  • SOFTWARE MODULES AND INTEGRATIONS

    For an online store: An order from the website is automatically transferred to 1C, and the customer receives an SMS with the package tracking number.
    For a service company: Booking through the website → task created in CRM → notification to the technician → integration with Google Calendar.
    For reporting: Automatic data collection from various sources and dashboard creation for management.

  • FULL CYCLE OF TURNKEY DEVELOPMENT

    Pre-project analysis: Business process studies, user interviews
    Technical design: Specifications, database schemas, API contracts
    Iterative development: Agile approach with demos every 2-3 weeks
    Testing and debugging: Unit tests, load testing, security checks
    Deployment and launch: Setting up servers, domains, SSL certificates
    Training and documentation: User manuals and technical documentation
    Support and development: Warranty service, monitoring, and enhancements
Work methodology

  • Immersion and analysis

    In-depth interview: I understand your business, processes, and pain points
    Analysis of current systems and technical requirements
    We formulate clear goals and project success metrics
    Result: Detailed technical specifications and schedule

  • Design and architecture

    I create prototypes/mockups of key screens
    I develop the solution architecture: database schema, API, integrations
    We approve each element with you before development begins
    Result: A complete design project and technical documentation

  • Iterative development

    I break the project into 2-week sprints.
    Each sprint ends with a working version and a demo.
    You make adjustments as you go, not at the end.

    Result: Continuous progress and oversight.

  • Testing and debugging

    Unit testing of each component
    Security and vulnerability testing
    Load testing for real-world scenarios

    Result: A stable product ready for launch

  • Implementation and launch

    Deployment on your servers or cloud infrastructure
    Configuring domains, SSL, and backups
    Basic training for your team
    Result: A working system in productionеде


  • Support and development

    Warranty period (usually 1-3 months)
    Regular updates and monitoring
    Readiness for scaling and improvements

    Result: Long-term partnership, not a one-time job
FOR SMALL PROJECTS (up to 100 hours)

Fixed price with payment in installments


Ideal for:

Landing pages

Small corporate websites

Modules/improvements to existing systems

MVP (minimum viable product)

$
400
FOR MEDIUM AND LARGE PROJECTS (from 100 hours)

Time & Materials (pay for actual time spent)


Ideal for:

Complex web applications

Mobile applications

Custom CRM/ERP systems

Projects with changing requirements

$
700
FOR LONG-TERM SUPPORT

Subscription model with a fixed monthly fee


Ideal for:

Supporting ongoing projects, actively developing projects, and key business systems requiring ongoing development



$
200
More products
Tech stack
Python/Django, JavaScript/React, Java/Spring; AWS, Google Cloud, Azure; Docker, Kubernetes; PostgreSQL, MongoDB, Redis.
  • Modern programming languages
    Working with Python/Django, JavaScript/React, Java/Spring to create effective solutions.
  • Cloud platforms
    Using AWS, Google Cloud, Azure for scalability and reliability of projects.
  • Containerization and orchestration
    Using Docker and Kubernetes to manage and orchestrate containers.
  • Databases
    Working with PostgreSQL, MongoDB, Redis for storing and processing data.
Solve your problem
Didn't find the service you need on the list?
Describe your needs—I'll suggest the best solution.
Free 30-minute consultation.
+33 0119225975
TVA - FR63100126812
zelenkovsdanils@inbox.eu
1 RUE DU LAVOIR, 77090 COLLEGIEN

Zelenkovs Danils 2026

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