ONESOL is a senior engineering studio. We design, build, and ship production software for teams who want to move fast without assembling an engineering org from scratch.
A clear, repeatable path so you always know what's happening and what's next.
We define the problem, constraints, and what success looks like together.
We design the system and data model before writing production code.
Iterative development with a working, reviewable build every week.
We deploy to production with monitoring and rollback in place.
We build web apps, APIs, and internal tools from the first commit, engineered to run in production and grow with you — not just a prototype that falls over under real traffic.
Cloud architecture, CI/CD pipelines, and performance work that keeps everything fast and reliable as usage grows. We stay on-call so releases go out safely and often.
Every engagement runs through the same phases, with visible progress the whole way.
No account managers, no handoffs — just a small senior team that owns the outcome.
Every line is written by an experienced engineer — no juniors learning on your budget.
From architecture to on-call, we take responsibility for the whole thing — not just the fun parts.
You see a working, reviewable build every week — progress you can click, not just status reports.
Monitoring, tests, and clean handover docs come standard, so the system keeps running without us.
Most start with a short scoping call where we define the problem, constraints, and success criteria. From there we send a scope and estimate, and can usually begin within one to two weeks.
Both. We can embed directly into your existing team and workflow, or take end-to-end ownership from architecture through on-call — whatever fits your stage.
Primarily TypeScript, React, Node.js, Go, PostgreSQL, and AWS, plus Kubernetes and Terraform for infrastructure. We pick tools that fit the problem, not trends.
After launch we stay on-call with monitoring and rollback in place, handle maintenance, and keep iterating on the product as it grows.
It depends on scope and duration. We work on fixed-scope projects and monthly retainers — reach out and we'll put together an estimate for your specific build.
Tell us what you're working on — we'll reply within a day.