I design and build production software systems.
I'm Turuu Byambaa, a full-stack engineer and product builder based in Mongolia. Over the past decade, I've worked on banking systems, SaaS products, AI platforms, open-source tools, and startup products from early concept to production.
I usually work across product decisions, system architecture, implementation, integrations, and the operational parts required after launch.
Banking systems · SaaS products · AI platforms · Open source · Startup experience
Selected work
A mix of professional systems, startup work, and independent open-source products.
What I work on
The four areas I am strongest in. Each one describes the kind of work, not a label.
Product engineering
Turning incomplete requirements into clear product flows, technical decisions, and working software.
SaaS systems
Authentication, multi-tenancy, roles, billing, credits, background jobs, integrations, and operational tools.
AI and data systems
Agents, RAG, extraction, structured knowledge, model integrations, and data-processing workflows.
Full-stack delivery
Building across frontend, backend, cloud infrastructure, deployment, debugging, and ongoing product operation.
Background
I began by learning from complete working source code and small applications, then moved into cloud products, production banking systems, SaaS platforms, startup work, and AI products. Today I split my time between professional engineering, independent products, and open-source work.
Recent writing
Notes from building software, operating products, working with AI systems, and learning from projects that did not go as planned.
Open to selected work
Working on a serious software product?
I'm open to selected product engineering, SaaS architecture, AI-system, and technical advisory work. Send me a short note about what you are building, its current stage, and where you need help.