---
title: "Custom software development"
description: "Custom software and APIs built for production. Type-safe React and Next.js frontends, high-throughput Rust, Go, or Node backends, and cloud infra that scales."
image: "https://foundrysoft.co/api/og?type=page&title=Custom+software+development&st=Custom+software+and+APIs+built+for+production.+Type-safe+React+and+Next.js+frontends%2C+high-throughput+Rust%2C+Go%2C+or+Node+backends%2C+and+cloud%E2%80%A6"
url: "https://foundrysoft.co/services/custom-software"
---

Software

Software

# Custom software development

Custom software and APIs built for production. Type-safe React and Next.js frontends, high-throughput Rust, Go, or Node backends, and cloud infra that scales.

Get in touch [All services](https://foundrysoft.co/services)

Focus

Software

Engagement

Fixed-scope or dedicated

Timeline

From 4 weeks

Ownership

100% yours

How we deliver

## Our process for custom software development

A fixed four-step path from first call to production, with weekly demos and a hard launch date.

Days 1–3

Step 01

### Systems audit

We analyze the current systems, constraints, and risks, then define scope and a fixed quote.

Deliverable

Systems map & fixed quote

Days 4–7

Step 02

### Architecture

We design the target architecture and a safe, incremental migration or build path.

Deliverable

Architecture & migration plan

Weeks 2–3

Step 03

### Build & test

We implement with rigorous automated testing, monitoring, and reversible, well-documented changes.

Deliverable

Tested, monitored code

Week 4

Step 04

### Deploy & handover

We verify reliability, optimize performance, deploy to production, and hand over full ownership.

Deliverable

Production release & docs

See where your project fits.

[Book your systems audit](https://foundrysoft.co/contact)

### Building reliable software

We treat software like physical infrastructure. It must be built to exact specifications and tested rigorously to handle production loads.

-   **Frontend development:** Building fast, type-safe interfaces with React and Next.js, optimized for performance.
-   **Backend engineering:** Building high-throughput backends in Rust, Go, or Node.js focused on speed and efficiency.
-   **Cloud infrastructure:** Setting up containerized environments with Kubernetes for high availability and global scale.
-   **Data and databases:** Designing database schemas and caching layers that remain reliable under heavy traffic.

### Performance standards

We focus on technical excellence, delivering high-performance software that is built to last.

-   **Reliability:** 100% test coverage requirements for core business logic.
-   **Security:** Integrated SOC2-ready protocols and automated security scanning in the CI pipeline.
-   **Performance:** Optimized for sub-500ms initial load times across all device classes.

#### What's included

-   Rigorous automated testing
-   Reversible, monitored rollouts
-   Clear technical documentation
-   100% source-code ownership

#### Have a project like this?

Tell us the goal, we'll reply with a scope and a fixed quote within a day.

Get in touch

#### Next service

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Explore more

## Related services

[All services](https://foundrysoft.co/services)

[Primary / Agents

### AgentOps

Run AI agents in production with telemetry, regression evals, and guardrails. We add observability, prompt versioning, and one-click rollbacks before launch.

Learn more](https://foundrysoft.co/services/agentops) [Artificial Intelligence (AI)

### AI Agent for Customer Service

Expert AI Agent for Customer Service services by FoundrySoft. We build scalable, secure, and modern solutions tailored to your business needs.

Learn more](https://foundrysoft.co/services/ai-agent-customer-service) [Artificial Intelligence (AI)

### AI Agent Development

Expert AI Agent Development services by FoundrySoft. We build scalable, secure, and modern solutions tailored to your business needs.

Learn more](https://foundrysoft.co/services/ai-agent-development)

## Ready to build custom software development?

Every project starts with a clear scope and a fixed timeline. Tell us what you're building and we'll reply within one business day.

Get in touch

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