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Turning complex workflows into secure, observable products.

I connect domain rules, backend services, web and mobile interfaces, and production operations so teams can understand, ship, and run the whole system.

View selected work

From workflow constraint to production signal

A concrete trace of the decisions that connect domain rules, product boundaries, delivery, and operations.

Model the real workflow

Users, roles, constraints, state changes, and failure cases become the system boundary.

One product, treated as a complete operating system

Buku: booking is the visible action. Coordination is the real system.

A multi-application appointment-booking, business-management, and service-discovery platform for appointment-based businesses.

Explore the Buku system

  1. 01

    Customer intent

    Service · staff · time

  2. 02

    Booking engine

    Rules · availability · sequence

  3. 03

    Business operation

    Calendar · staff · notification

Decisions made visible

  1. D1Go backend with PostgreSQL, PostGIS, and Redis
  2. D2Separate customer, business, and administration experiences
  3. D3Next.js web application and React Native mobile applications
  4. D4Multi-service sequential booking for the MVP

Completed

Monorepo, shared packages, and local infrastructure established

Completed

Core booking, staff, business, and administration workflows defined

In progress

Customer and business experiences under active implementation

Planned

First hosted end-to-end release

Production evidence, without exposing confidential systems

Production systems where reliability, security, integrations, and operational visibility provide the strongest evidence of delivery.

  1. 01

    Public Records and Information Request Management Platform

    ISA Consulting GroupConfidential client project

    Delivered maintainable tenant-aware request-management and authentication workflows with production-readiness, security, observability, and error-handling considerations built into implementation and review.

    View project details

  2. 02

    Enterprise Legal Technology and Document Review Platform

    ISA Consulting GroupConfidential client project

    Improved the reliability, maintainability, security, and operational visibility of existing platform functionality through production issue investigation, dependency remediation, technical specifications, and production-readiness review.

    View project details

  3. 03

    Automotive Regulatory Data and Integration Platform

    Lufthansa Industry SolutionsConfidential client project

    Improved integration reliability and operational visibility through corrected data contracts, trace-correlated logging, distributed tracing, metrics, dashboards, alerts, and dependency-security remediation.

    View project details
View the complete project archive

How I can help

I work with companies that need more than isolated feature development: a clear product definition, sound architecture, and software that remains reliable after launch.

  1. 01

    SaaS and digital product development

    Design and implementation of customer-facing or multi-tenant products, including authentication, roles, workflows, administration, subscriptions, integrations, web applications, and mobile experiences.

  2. 02

    Internal tools and operational systems

    Software for inventory, approvals, invoicing, reporting, audit trails, staff workflows, and other business processes that need to replace spreadsheets or disconnected manual tools.

  3. 03

    Backend, integration, and production engineering

    Focused engineering support for APIs, system integrations, observability, cloud infrastructure, application security, production troubleshooting, and reliability improvements.

A method for making complicated systems legible

I am most engaged by projects where the technical problem is inseparable from the domain: scheduling, inventory integrity, document workflows, fiscalization, accessibility, or production reliability. I enjoy turning those constraints into systems that are understandable, maintainable, and useful to the people operating them.

I approach software as both an engineering system and a business tool. The goal is not only to ship features, but to make the product understandable, operable, and useful.

  1. Start with the domain

    Clarify users, roles, workflows, constraints, failure cases, and the decisions the software must support before optimizing implementation details.

  2. Define a focused first release

    Separate essential workflows from later enhancements so that the first release is coherent, testable, and useful.

  3. Design for production

    Treat validation, security, observability, migrations, error handling, deployment, and operational support as part of the product.

  4. Deliver iteratively

    Use specifications, small implementation steps, review, and validation to keep complex systems aligned with the original problem.

Bring me the complicated part.

I am available for selected B2B engagements where product workflows, backend systems, integrations, security, and production reliability need to work as one system.

A useful first message includes the problem, intended users, current stage, desired timeline, and any important technical or operational constraints.

Discuss an engineering engagementGitHub

Or write directly to laerti98@gmail.com.