Mikhail Mustonen

In development since 2019: from fullstack MERN projects to enterprise applications in healthcare, government, and logistics.
Worked both at project initiation (architecture design) and in scaling/refactoring long‑lived systems. Experienced in micro‑frontends, modular architectures, and trade‑off evaluation.
Regularly collaborate with analysts, back‑end developers, and designers to shape contracts and user flows. Interact with customers via demos; wrote internal articles, contributed to knowledge base.
In debugging, focus on root causes over quick fixes. Enjoy tackling complex tasks, breaking them down, and delivering simple, maintainable, reliable solutions.
Currently focused on deepening frontend expertise, updating toolset, and broadening into adjacent areas.

Competencies & technologies:

— Architecture & scalability: Micro‑frontends (redux‑micro‑frontend, Web Components, Module Federation), FSD, Layered Modular Architecture.
— Data & state management: Redux/RTK+RTK Query, Axios, Zustand, React Query, query‑key factory, Redux-Saga, Reselect, strict TypeScript (generics, conditional types).
— Forms & validation: Formik+Yup, React Hook Form, Zod, React Final Form; multi‑step dynamic forms, form arrays, deep nesting, async validation.
— Tables & lists: Custom solutions, tanstack‑table, Ant Design tables; server‑side pagination/filtering/sorting, template saving, virtualization of large lists.
— UI & customization: Material UI (deep theme customization), Ant Design, shadcn, Styled Components, Tailwind, recharts.
— Integrations & infrastructure: AWS (Amplify, Cognito, SNS), Firebase (Realtime DB, Cloud Functions), Swagger (openapi‑typescript, orval), Socket.io. JWT, keycloak.
— Refactoring & support: Migrated from vanilla Redux to Zustand, from CRA to Vite, from Redux-Saga to React Query, introduced API type generation, upgraded libraries.
— Code style, config, docs: Configured Vite+ESLint+Prettier+Husky. Documentation (stack, architecture, module examples).
— Testing: Load testing by k6+Grafana+InfluxDB (user scenarios, load profiles, bottleneck analysis). E2E testing by Playwright (OOP, detailed Allure reporting).
— Performance: Selector/memoization optimization, virtualization, query caching trees, suspense.
— Teamwork & processes: Scrum, git‑flow, interviews, cross-reviews, onboardings, Jira, Confluence, MS Teams.
— AI-assisted development: Claude Code, internal Qwen (OpenCode); MCP (Context7, Figma, Playwright), skills/plugins. Built projects from scratch and integrated into legacy systems — multi-fold productivity gains.