We Build Software That Ships.

A freelance software development agency. Senior engineers, direct communication, production-ready code. No fluff.

Who We Are

Senior developers who actually deliver.

We're a freelance software development agency built by senior engineers with 10+ years of experience each. No project managers in between, no outsourcing to juniors. You get direct access to the developers building your product. We've shipped SaaS platforms, mobile apps, internal tools, and APIs for startups and enterprises across fintech, healthcare, e-commerce, and logistics.

What We Do

End-to-end software development services.

01

Full-Stack Web Apps

React, Next.js, Vue, Node.js, Python, Go. Production-grade web applications from database to deployment.

02

Mobile Development

React Native and native iOS/Android. Cross-platform when it makes sense, native when it doesn't.

03

API & Backend Systems

REST, GraphQL, microservices, event-driven architecture. Backends that handle scale without falling over.

04

Cloud & DevOps

AWS, GCP, Azure. CI/CD pipelines, Docker, Kubernetes, Terraform. Infrastructure that runs itself.

05

UI/UX Design

User research, wireframes, prototypes, and design systems. Interfaces that convert and make sense to real users.

06

Technical Consulting

Architecture reviews, code audits, tech stack decisions, scaling strategy. Honest advice from people who build.

Our Work

Series A Fintech Startup

FinTrack Pro

Real-time financial analytics dashboard processing 50K+ transactions daily. Built the entire platform from scratch in 4 months.

ReactNode.jsPostgreSQLWebSocketAWS

Healthcare Platform

MediConnect

HIPAA-compliant telehealth platform serving 10K+ patients. Video consultations, scheduling, EHR integration.

Next.jsPythonAWSRedisWebRTC

What clients say after launch.

These are the kinds of responses we collect after shipping. The CMS stores the full submission record, while the website only publishes testimonials you approve.

Client testimonial

1 of 3

They moved like an internal product team, not an external agency. We got sharp technical guidance, clean execution, and a portal our customers actually enjoy using.

Clear communicationSpeed of deliveryProduct thinking

Ava Sinclair

Founder & CEO

Northstar Client Portal

Overall satisfaction: Very satisfied

LinkedIn

Our Tech Stack

Technologies we use to build and ship.

React / Next.js / Vue

Modern frontend frameworks. Server-rendered when SEO matters, SPA when speed matters.

Frontend

Node.js / Python / Go

Backend languages chosen per project. Node for full-stack JS, Python for ML/data, Go for performance.

Backend

PostgreSQL / Redis / MongoDB

Relational for structured data, Redis for caching and queues, MongoDB when documents make sense.

Database

AWS / GCP / Docker / K8s

Cloud-native deployments with CI/CD, containerization, and infrastructure as code.

Infrastructure

No BS. Just good software.

We write clean code, communicate clearly, hit deadlines, and don't disappear. That's it.

Got a project? Let's talk.

Tell us what you need built. We respond within 24 hours with a plan and honest estimate.

hello@butterflyinstruments.com
Remote-first — Worldwide