Custom Software Development
Your system.
Your code.
Microservices, APIs, web apps, mobile apps. Built from scratch in the right tool for the job. Source code delivery is standard, so you own every line we write.
Proof points
- BizRP: 15 Go microservices powering full ERP plus storefront
- Sotto: 29 .NET projects, sub-500ms voice AI for UK restaurants
- ViewCasta: 19 Rust services running a VOD and OTT platform
- BitsPath Voice: a Rust PBX engine of roughly 517,000 lines
What is the LoneSock custom software service?
A build-from-scratch engagement where LoneSock architects, develops, and ships enterprise software for the client. Stack is chosen per problem: Go for throughput, .NET 10 for enterprise patterns, Rust for systems work, Next.js for the UI.
Where a KaritKarma product would replace the need to build, we say so. When the client needs a standalone codebase they own outright, we build it from scratch and ship the full repository with infrastructure-as-code, tests, and runbooks.
Technology stack
Right tool for the job.
The languages and frameworks LoneSock uses across client engagements, and what each one is for.
Go
High-throughput microservices, ERP backends, event-driven systems.
.NET 10
Enterprise CQRS, event sourcing, multi-tenant SaaS, Wolverine, MassTransit.
Rust
Systems programming, PBX engines, payment switches, protocol parsers.
Next.js 16 + React 19
Server components, Tailwind CSS 4, TypeScript, App Router.
React Native
Cross-platform iOS and Android. Native Swift or Kotlin when needed.
PostgreSQL 18
Always PostgreSQL. PostGIS for geo, pgvector for embeddings, full-text search built in.
How we compare
LoneSock vs typical agency vs in-house build.
| Dimension | LoneSock | Typical agency | In-house build |
|---|---|---|---|
| Source code ownership | Delivered on every milestone | Sometimes, with caveats | Built-in |
| Time to first sprint | 1-2 weeks after architecture | 4-8 weeks | Hiring cycle, 3-6 months |
| Architect hands on keys | Yes, every sprint | Pre-sales only | Depends on hire |
| Effective hourly rate | $20 | $80-150 | $60-200 fully loaded |
FAQ
Frequently asked.
- What is the LoneSock custom software development service?
- It is a build-from-scratch engagement where LoneSock architects, develops, and ships enterprise software for the client. Primary backends are Go, .NET 10, and Rust. Frontends are Next.js 16 with React 19 and Tailwind CSS 4. Mobile is React Native. PostgreSQL is the default database. Engagements bill at $20 per hour with full source code delivery.
- Which language do you pick for which problem?
- Go for high-throughput microservices, ERP backends, and event-driven systems. .NET 10 for enterprise CQRS, event sourcing, and multi-tenant SaaS where Wolverine, MassTransit, and Aspire pay off. Rust for systems-critical paths such as payment switches, PBX engines, and protocol parsers. Next.js for any user-facing surface that needs SSR plus React.
- What is delivered at the end of an engagement?
- A complete repository with code, infrastructure-as-code definitions, deployment scripts, CI/CD pipelines, automated tests, runbooks, and architecture documentation. You receive everything required to run the system without LoneSock if you choose to.
- Do you build mobile apps as well?
- Yes. React Native is the default for cross-platform iOS and Android. Native Swift or Kotlin when a feature depends on deep platform integration. Flutter is on the table for clients with existing Flutter codebases.
- Can you modernize a legacy system instead of rebuilding from scratch?
- Yes. We have migrated VB6, classic ASP, and .NET Framework systems to modern .NET 10 and Go using strangler-fig patterns. The legacy system keeps running while modules are carved off one at a time, so production never goes dark.
- How does LoneSock compare to a typical agency for custom builds?
- Architects build, not just sell. The same engineers who design the system write the production code. Hourly rate is $20 because the cost base is Dhaka, not San Francisco. Source code ownership is standard and unconditional. There are no managed service contracts that turn the client into a long-term subscriber.
Ready to build?
Tell us what you need. We will tell you how we would approach it, what it would cost, and when it would ship.