Backend-heavy product areas
APIs, business logic, critical workflows, reliability, and long-running systems.
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Valerii Tikhomirov
Backend-Focused Senior Full-Stack Engineer
I help improve SaaS products, APIs, internal tools, and other critical backend systems.
My strongest work is backend-heavy product engineering that needs ownership, reliability, and low-management-overhead execution. In recent years, that has included billing and subscriptions, production security, infrastructure migration, business logic, PostgreSQL-heavy optimization, and long-running service maintenance.
I built and continue to run MindLog, where I carry major solo ownership across backend, infrastructure, billing, product logic, and supporting systems. I have also worked across CRM, supporting microservices, and a Go-based mobile backend, usually in the parts of a system that needed stronger engineering judgment or recovery-oriented thinking.
I work best in remote, flexible, project-based or contract collaborations where I can take responsibility for an important product area and move it forward carefully.
Best-fit work
SaaS and internal tools
Products that need pragmatic engineering, careful ownership, and steady delivery.
Migrations and optimization
Security hardening, billing flows, PostgreSQL work, performance fixes, and system cleanup.
Selected proof
MindLog
Built and run with major solo ownership across backend, infrastructure, billing, and product-critical systems.
Go mobile backend
Reduced a slow dashboard flow from 20+ seconds to around 1 second and handled business-logic-heavy backend work.
Call-center CRM
Reworked a fragile bonus-calculation subsystem around safer recalculation, raw data preservation, and PostgreSQL-heavy improvements.
Explore the site
- selected work — Short case-study style summaries of the strongest backend and product work.
- work with me — Preferred collaboration format, best-fit projects, and how I usually work.
- resume — A structured background summary with core experience, stack, and working style.