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CallSoft

We build the systems businesses run on

Payroll, contact-center, compliance, and data systems, built and modernized by senior engineers. AI where it helps, and a person reviewing every change.

Start a project

or email inquiry@callsoft.com

Selected work

Four projects written up in full, from the problem to the result.

  • Healthcare

    Medical Waste Compliance Tracking

    Healthcare web application for viewing and tracking medical waste manifests for regulatory compliance. Comprehensive document management for mail-in and pickup services.

  • Enterprise

    Proprietary Payroll Management System

    Payroll solution aggregating data from contact centers, time clocks, and supervisor systems. Intelligent data normalization and dual-interface design for employees and administrators.

  • Enterprise

    Next-Generation Contact Center Interface

    Modern replacement for legacy contact center systems with VOIP integration, customizable screen layouts, and dynamic scripting. Bridges legacy TCP/IP with modern API-based solutions.

  • AI/ML

    AI-Powered Data Cleaning & Matching

    Data processing solution using AI for intelligent normalization and issue identification. Features custom MCP server integration for interaction with proprietary client data systems.

See all 12 projects

Services

New systems, old systems, and the integrations between them.

Build new

Full-Stack Development
End-to-end web applications with React, Node.js, Python, and .NET. From frontend to backend, we build scalable, maintainable solutions.
Mobile Development
Native and cross-platform mobile applications for iOS and Android using React Native, Flutter, and platform-native toolchains.
API Development
RESTful APIs, GraphQL endpoints, third-party integrations, and microservices architecture from design through documentation.

Modernize and integrate

Legacy Modernization
Strategic migrations, legacy system maintenance, and modernization. We find the most cost-effective path to optimal outcomes.
Cloud Architecture
Scalable cloud solutions on AWS, Azure, and Google Cloud. Infrastructure as code, containerization, and cloud-native development.

AI and security

AI & Intelligent Systems
LLM integrations, agentic workflows, MCP servers, and RAG pipelines engineered for production — not demos. Need data privacy? Fully offline inference or your own API keys.
Auth, Security & Compliance
Enterprise authentication, authorization, and compliance solutions. Experience building for regulated industries including healthcare and government, where security isn't optional.

Technologies

Frontend
React, Angular, TypeScript, Next.js, Vue.js, Blazor, Electron, Tailwind CSS
Backend
Node.js, Python, .NET / C#, Django, FastAPI
Mobile
React Native, Flutter, .NET MAUI, Blazor Hybrid, iOS (Swift), Android (Kotlin)
DevOps and CI/CD
Docker, Kubernetes, GitHub Actions, Azure DevOps
Cloud platforms
AWS, Azure, Google Cloud, Vercel
AI and data
LLM integration, Agentic workflows, MCP servers, RAG pipelines, Computer vision, TensorFlow, PyTorch
AI models
Anthropic, OpenAI, Google, Meta, Mistral, Locally hosted open-weight models
Databases
PostgreSQL, MongoDB, SQL Server, Redis, MySQL, Convex

Using something else? We'll learn your stack.

All brand names, logos, and trademarks are the property of their respective owners. CallSoft has no official partnerships or endorsements beyond utilizing their publicly available products and services to deliver solutions for our clients.

How we work

Small by design, so the person you talk to is the person who builds.

The engineer you meet builds your system

CallSoft is deliberately small. The senior engineer on your first call architects, builds, and ships your system, with no handoff to a bench you never met.

AI speeds the work, and engineers own it

We use agentic coding tools every day, directed by 16 years of production experience. An experienced engineer reviews every change before it ships.

Legacy systems are welcome

We maintain, modernize, and migrate legacy systems, and we look for the most cost-effective path, which isn't always a rewrite.

Process

  1. 1 Discovery

    Requirements analysis and scope definition

  2. 2 Design

    Architecture and user experience planning

  3. 3 Build

    Development with senior oversight

  4. 4 Deploy

    Testing, launch, and ongoing support

About CallSoft

CallSoft brings 16 years of hands-on engineering across enterprise, healthcare, and government systems.

Every project gets senior-level attention from engineers who have shipped production systems in regulated industries, complex integrations, and high-availability environments.

Security and IP, by default

  • NDA before code is shared
  • Full IP assignment on paid work
  • Client-owned repositories and infrastructure
  • AI tooling that runs fully offline or under your API keys
  • Used to vendor security questionnaires and regulated-industry constraints from healthcare and government work

Start a project

We reply within one business day. US-based and remote-first.

What you want built or fixed, and when you'd like to start.

Prefer email? inquiry@callsoft.com

Ways to work with us

Hourly
Detailed estimates based on your requirements.
Retainer
Ongoing maintenance, development, or team integration.
Fixed scope
For well-defined projects. You pay for outcomes, not hours.