For over 20 years, Smartsheet has helped people and teams achieve–well, anything. From seamless work management to smart, scalable solutions, we’ve always worked with flow. We’re building tools that empower teams to automate the manual, uncover insights, and scale smarter. But more than that, we’re creating space– space to think big, take action, and unlock the kind of work that truly matters. Because when challenge meets purpose, and passion turns into progress, that’s magic at work, and it’s what we show up for everyday.

We are looking for a passionate and experienced Senior Software Engineer to join our Workflow Builder UI pillar. In this role, you will be the primary craftsperson of our next-generation drag-and-drop workflow experience – the visual layer that thousands of teams rely on to design, configure, and automate their processes. You will shape every pixel and interaction, working at the intersection of high-performance rendering, rich component design, and developer experience.

This is your opportunity to build a product that end-users see and touch every single day, deeply integrating modern React patterns, leading UI component libraries, and – as a nice-to-have – MCP UI tooling to accelerate development velocity.

You will work remotely from Bulgaria and will be reporting to an engineering leader.

You Will:

Own the Workflow UI Experience

Architect, build, and iterate on the Workflow Builder front-end, delivering a performant, accessible, and delightful drag-and-drop editing experience.
Drive component design, layout systems, and interaction patterns that scale across Smartsheet's enterprise customer base.
Champion visual quality, pixel-precision, and a high bar for UX polish throughout the development lifecycle.

Develop with React & UI Libraries

Build production-grade features using React (v18+), leveraging hooks, context, concurrent rendering, and Suspense for advanced UI behaviors.
Integrate and extend component libraries (e.g., MUI, Radix UI, Shadcn/ui, or internal design system components) to create a consistent, reusable UI language across the product.
Evaluate and champion the adoption of new React capabilities and ecosystem tooling that improve developer productivity and user experience.

Collaborate on Architecture & APIs

Work closely with back-end engineers and product managers to design clean REST API contracts that serve the workflow rendering and interaction needs.
Participate in architectural discussions and code reviews, advocating for front-end best practices: code splitting, memoization strategies, accessibility (WCAG AA), and performance budgets.
Define and uphold front-end coding standards, patterns, and automated testing strategies (unit, integration, visual regression) across the pillar.

Deliver High Quality at Scale

Write comprehensive unit and integration tests (Jest, Cypress, Playwright) with a strong culture of test-driven development and visual regression coverage.
Monitor front-end performance metrics (Core Web Vitals, bundle size, rendering throughput), identify bottlenecks, and drive measurable improvements.
Partner with UX designers to translate wireframes and prototypes into refined, fully accessible UI components.

Mentor & Lead

Serve as a UI subject matter expert for the team, mentoring junior and mid-level engineers on React best practices, component design, and scalable state management.
Contribute to technical roadmap planning and effort estimation for UI-heavy features, surfacing risks and tradeoffs to engineering leadership.

Strategically apply AI Tools

Champion the use of AI-assisted development tools (GitHub Copilot, Claude, Cursor, etc.) within the team to accelerate feature development and code quality improvements.
Build and evaluate AI-powered features in the Workflow Builder that leverage generative AI or agentic workflows to deliver measurable customer value.

You Have:

5+ years of professional front-end software engineering experience with a strong focus on UI/UX-facing product work.
Expert-level proficiency in React (v17+), including hooks, context API, concurrent features, and performance optimization techniques (memoization, virtualization, profiling).
Deep experience with TypeScript, HTML5, and CSS3 (including CSS custom properties, CSS Modules, Grid, and Flexbox).
Hands-on experience integrating and customizing UI component libraries (MUI, Radix UI, Shadcn/ui, or similar) and/or contributing to an internal design system.
Strong understanding of state management patterns (Redux Toolkit, Zustand, Jotai, or React Query) and when to apply each in complex application scenarios.
Experience building accessible UIs (WCAG 2.1 AA compliance) and a genuine understanding of why accessibility matters.
Proven track record of optimizing front-end performance (code splitting, virtual scrolling, React.memo/useMemo tuning, bundle analysis, memory profiling).
Experience with modern front-end testing frameworks (Jest, Cypress, Playwright, or Storybook visual regression).
Excellent verbal and written communication skills in English; proven ability to collaborate across design, product, and engineering stakeholders.
1+ year professional experience leveraging AI-based workflows to author, review, and maintain code.
1+ year building AI-augmented product features that incorporate generative AI or agentic workflows to solve real customer problems
Legally eligible to work in Bulgaria on an ongoing basis.
Fluency in English is required.

Nice to have:

Experience with MCP UI tooling or Model Context Protocol integrations in front-end workflows.
Familiarity with canvas/SVG rendering libraries (Fabric.js, Konva, React Flow, or custom WebGL/Canvas 2D) for building interactive workflow diagram surfaces.
Exposure to micro-frontend architectures and module federation in large-scale React applications.
Background in drag-and-drop UI frameworks (dnd-kit, react-beautiful-dnd, interact.js, or similar).
Advanced certifications in front-end (e.g., Google UX Design, AWS Certified Developer) or relevant open-source contributions.

Get to Know Us:

At Smartsheet, your ideas are heard, your potential is supported, and your contributions have real impact. You’ll have the freedom to explore, push boundaries, and grow beyond your role. We welcome diverse perspectives and nontraditional paths—because we know that impact comes from individuals who care deeply and challenge thoughtfully. When you’re doing work that stretches you, excites you, and connects you to something bigger, that’s magic at work. Let’s build what’s next, together.

Equal Opportunity Employer:

Smartsheet is an Equal Opportunity (EEO) employer committed to fostering an inclusive environment with the best employees. It is our policy to provide equal employment opportunities to all qualified applicants in accordance with applicable laws in the US, UK, Australia, Germany, Costa Rica, Japan, Bulgaria, and India. All qualified applicants will receive consideration without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, protected veteran or disabled status, or genetic information.

If there are preparations we can make to help ensure you have a comfortable and positive interview experience, please let us know.

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Sr. Software Engineer, Automation Experience (Remote Eligible from Bulgaria)