Maksym Sulym - Senior Frontend / Product Systems Engineer

Profile

I lead frontend and product engineering on enterprise React/TypeScript platforms—Staff-level architecture, delivery systems, CI/CD quality gates, and hands-on work where technical risk is highest.

Senior Frontend / Product Systems Engineer with 10+ years of experience building, modernizing, and leading enterprise web platforms. Strongest where frontend architecture, product workflow delivery, engineering process, API contracts, quality gates, and team execution need to operate as one system.

Operated as a frontend/UI engineering lead with Engineering Manager-level responsibilities across 1:1s, hiring interviews, onboarding, performance feedback, individual growth, task assignment, sprint planning, delivery ownership, stakeholder reporting, and team health.

Hands-on where technical risk is highest: React/TypeScript architecture, complex product workflows, generated API clients, RBAC/PBAC-aware interfaces, data-heavy forms and grids, file-processing flows, production hotfixes, build systems, CI/CD, and frontend observability.

Selected impact

Led frontend/UI engineering for teams up to 8 engineers and mentored 3–6 additional engineers across junior, middle, and senior levels.
Reduced deployment time from approximately 10–15 minutes to 3–6 minutes in applicable environments.
Established reusable frontend foundations using Nx, shared packages, shared configs, generated TypeScript clients, private package workflows, and maintainable app structure.
Introduced engineering process improvements across PR/review standards, branch/release policy, commit validation, quality gates, Storybook, Playwright/Vitest, release checklists, rollback flow, and dependency updates.
Built and modernized product UIs with RBAC/PBAC-aware admin workflows, data grids, file-processing flows, and validation-heavy interfaces.

Target roles

Frontend / UI Engineering Lead
Staff Frontend Engineer
Frontend Engineering Manager
Frontend Platform Lead
UI Platform Lead

Core positioning

Engineering leadership

Led frontend/UI engineering for teams up to 8 engineers.
Mentored 3–6 additional engineers across junior, middle, and senior levels.
Conducted 1:1s, hiring interviews, onboarding, performance review input, individual growth planning, and quality conversations.
Owned sprint planning, task decomposition, delivery deadlines, release readiness, stakeholder reporting, and team process improvements.
Coordinated delivery across PM/PO, BA, QA, UX/design, backend, and stakeholder groups.

Staff-level frontend architecture

Defined frontend architecture standards, package boundaries, shared configuration, generated client workflows, and delivery foundations reused beyond the original team.
Established monorepo structures, shared packages, application foundations, internal package workflows, and frontend/backend integration patterns.
Reviewed architecture, resolved frontend/backend/product/design disagreements, and acted as technical escalation point.
Defined long-term migration strategies for legacy frontend systems while keeping active product delivery moving.

Engineering process and delivery systems

Introduced PR templates, defect-reporting templates, coding conventions, branch/release policy, commit validation, lint/test/coverage gates, Storybook process, Playwright/Vitest strategy, deployment/release checklists, rollback process, dependency update process, and monorepo boundaries.
Replaced manual deployment paths with CI/CD workflows covering build, test, validation, deployment, rollback readiness, security checks, commit checks, and PR quality gates.
Improved debugging and production visibility through frontend observability, Datadog RUM/logging, structured issue reproduction, and production signal capture.

Hands-on implementation depth

React, TypeScript, Next.js, TanStack, Redux/RTK Query, Vite, Webpack, HTML/CSS.
Complex forms, data grids, admin workflows, routing, state management, design-system integration, permission-aware interfaces, large data workflows, and file-processing flows.
API integration through REST, OpenAPI-generated TypeScript clients, validation, error handling, and contract-driven frontend/backend delivery.
Backend-adjacent workflow delivery with NestJS, Prisma, workflow APIs, validation services, simple schemas/migrations, and backend incident participation where product boundaries required it.

Professional Experience

Avenga 07/2022 - Present

Senior Frontend Developer / Team Lead

Functional scope: Frontend/UI Engineering Lead with Engineering Manager-level responsibility

Enterprise data-mapping and operational workflow platform

Domain: enterprise healthcare/biopharma data workflows, internal operations, permission-aware administration, validation-heavy product flows

Team context: small full-stack team; frontend-primary ownership with workflow-level backend/API implementation where needed

Architected a new Nx/Next.js/NestJS platform foundation with shared packages, generated TypeScript clients, Storybook, Playwright/Vitest, and CI quality gates.
Standardized frontend/backend integration around OpenAPI-generated clients, validation behavior, and contract-driven delivery.
Hardened RBAC/PBAC-aware admin workflows across authenticated UI constraints and backend/API authorization checks.
Improved data-heavy workflow behavior by addressing rendering bottlenecks, validation hot paths, file-size constraints, large dataset handling, and payload format efficiency.
Delivered NestJS/Prisma workflow services for validation logic, process utilities, data-grid endpoints, and file-processing flows.

Core stack: React, TypeScript, Next.js, NestJS, Prisma, Nx, TanStack, OpenAPI-generated TypeScript clients, Playwright, Vitest, Storybook

Cloud-based operations platform

Domain: commercial operations SaaS covering inventory, ordering, billing, reporting, analytics, customer/admin workflows, and operational tooling

Team context: 6–8 frontend engineers dynamically; multiple frontend applications across separate repositories; shared packages and frontend foundations

Led frontend delivery across legacy stabilization, new application foundations, shared packages, generated clients, and CI/CD quality gates.
Owned sprint planning, task decomposition, estimation, technical clarification, frontend release readiness, and cross-functional coordination.
Designed reusable frontend application foundations with shared configuration, package boundaries, generated API clients, test setup, and maintainable project structure.
Replaced manual deployment flows with CI/CD pipelines; reduced deployment time from approximately 10–15 minutes to 3–6 minutes in applicable environments.
Introduced Datadog RUM/logging and stabilized legacy frontends through refactoring, production fixes, and incremental modernization without freezing delivery.

Core stack: React, TypeScript, RTK Query, Nx, GitHub Actions, Release Please, Vite, Playwright, Storybook, Datadog RUM, AWS CloudFront/S3/Lambda, private package registries

Omnichannel messaging and customer operations platform

Domain: customer messaging, account management, billing, reporting, access management, and real-time communication workflows

Team context: 6–8 frontend engineers dynamically; frontend/team-lead responsibilities across modernization and product delivery

Continued frontend/team-lead ownership across delivery scope, modernization constraints, release priorities, and cross-functional coordination.
Coordinated implementation across product, backend, QA, design, and stakeholder groups through backlog refinement, task breakdown, and release readiness.
Participated in architecture and implementation reviews for UI patterns, frontend modernization, release stability, and shared component direction.
Modernized a legacy frontend stack while keeping production builds stable during React and Webpack migration work.
Built design-system components and supported performance-sensitive browser media workflows through WebAssembly-based audio processing.

Core stack: React, TypeScript/JavaScript, Redux, WebSockets, WebAssembly, Webpack, Storybook, SCSS/LESS, frontend observability, Figma

Perfectial 06/2019 - 07/2022

Senior Frontend Developer

Omnichannel messaging and customer operations platform

Domain: customer messaging, account management, billing, reporting, and real-time communication workflows

Led frontend delivery for teams of 2–8 engineers across shifting product scope, backend dependencies, release priorities, and modernization constraints.
Maintained team velocity and code quality through backlog refinement, coding conventions, mentoring, PR review expectations, and delivery coordination.
Delivered proof-of-concepts and internal demos to validate feature direction and reduce product/engineering ambiguity.
Migrated a legacy frontend stack from older React/Webpack foundations to newer production-ready architecture while preserving build stability.
Coordinated with PM/BA/QA/design/backend stakeholders to keep releases focused, technically feasible, and aligned with product priorities.

Core stack: React, Redux, JavaScript/TypeScript, Webpack, Storybook, WebSockets, WebAssembly, SCSS/LESS, Figma

Perfectial 12/2015 - 06/2019

Frontend Developer

Enterprise and product UI projects

Domain: enterprise, finance, security, trading, reputation-management, and product workflow systems across legacy and modern stacks

Built and maintained frontend modules for enterprise, finance, security, trading, reputation-management, and product workflow systems.
Worked across legacy and modern frontend stacks, including React, JavaScript, Webpack, Babel, HTML/CSS, SCSS, and CSS-in-JS.
Supported technical backlog refinement, frontend implementation, UI fixes, cross-browser behavior, and legacy modernization.
Developed responsive interfaces, product workflows, admin surfaces, marketing/product pages, and UI integrations.
Built a foundation in practical frontend delivery across multiple domains before moving into senior/team-lead responsibilities.

Core stack: React, JavaScript, Webpack, Babel, HTML, CSS, SCSS, CSS-in-JS, Figma/InVision/Zeplin

SoftServe 01/2014 - 12/2015

UI Engineer

Enterprise HR management and compensation workflows

Domain: HR compensation logic, competence management, employee review processes, career mapping, and confidential employee data

Engineered UI for complex HR workflows involving compensation logic, competence management, employee review processes, career mapping, and confidential employee data.
Translated business rules and access-control requirements into responsive frontend forms, data visualizations, and user workflows.
Supported UI/usability testing, acceptance regression, localization, compatibility checks, and frontend quality standards.
Worked closely with business and engineering stakeholders to deliver enterprise UI under strict process and confidentiality constraints.

Core stack: HTML, LESS, jQuery, JavaScript, responsive UI, Zeplin

Webvizarts Sp. z o.o. 01/2013 - 12/2013

UI Engineer

Commercial web and CMS-based delivery

Domain: responsive commercial websites and UI components under short delivery timelines

Built responsive commercial websites and UI components using early frontend tooling and CMS-based delivery.
Delivered HTML/CSS/JavaScript interfaces, layout implementation, and frontend modifications under short delivery timelines.
Built practical foundations in UI implementation, cross-browser behavior, responsive layouts, and design-to-code translation.

Core stack: HTML, CSS/SCSS, JavaScript, jQuery, Bootstrap, CMS-based frontend work

Technical Skills

Frontend: React, TypeScript, JavaScript, Next.js, TanStack, Redux/RTK Query, Vite, Webpack, HTML/CSS, SCSS, TailwindCSS
Product UI: Complex forms, data grids, admin workflows, design systems, permission-aware interfaces, large data workflows, file-processing flows, dashboards, customer portals
Architecture/DevEx: Nx monorepos, shared packages/configs, generated clients, module boundaries, CI/CD, GitHub Actions, Release Please, private registries, PR quality gates
API/backend-adjacent: REST, OpenAPI-generated TypeScript clients, NestJS, Prisma, validation, error handling, simple schemas/migrations, API authorization integration

Testing/observability: Playwright, Vitest, Jest, Testing Library, Storybook, Datadog RUM, Kibana/APM, structured logging

Education

Ukrainian Academy of Printing

Bachelor's Degree, Publishing and Printing Information Technology

2009 2013

Languages

Ukrainian
English