Full Stack Developer - UX (Europe, Remote)

iDelsoft · posted Nov 3, 2026

Open to candidates in Albania, Andorra and 46 more

Albania, Andorra, Armenia, Austria, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Georgia, Germany, Gibraltar, Greece, Hungary, Iceland, Ireland, Italy, Kosovo, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye, Ukraine, United Kingdom

Senior

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What this job asks for

Extracted by RemoteHunt

Must have

•5+ years building production React + JavaScript apps
•Deep knowledge of state management
•Experience with complex grid/table UIs
•Strong understanding of rendering performance
•Comfort with Node.js APIs, Postgres, Elasticsearch
•Strong product sense

Nice to have

•Real-time collaboration experience
•File handling expertise
•Familiarity with design systems
•Knowledge of feature flags, product analytics, error monitoring

Tools and technologies

React, JavaScript, Node.js, Postgres, Elasticsearch, TanStack Table, ag-Grid, Handsontable, Yjs, Automerge, Liveblocks, WebSockets, CSV, Parquet, Radix

Read the full posting

You'll own the UX and much of the application logic for a highly interactive, spreadsheet-style table. Your north star is speed, polish, and correctness the experience should feel as smooth as the best modern tools (Notion, Google Sheets, Clay).

What you'll do

Build a virtualized, configurable table that performs smoothly at scale (50k100k+ rows) with features like resize/reorder, hide/show, freeze, multi-select, bulk edit, and inline validation.
Deliver a rich filter and sort experience: multi-field, AND/OR groups, saved views, quick search, and faceting powered by a search backend.
Implement inline editing with optimistic updates, conflict resolution, and resilient fallbacks (e.g., retry queues).
Create advanced column operations: duplicate/rename, derived or computed fields, enrichment triggers per row/selection.
Maintain high UX standards, including empty/error/loading states, responsive layouts, and internationalization readiness.
Continuously instrument and optimize performance (virtual scrolling, memoization, batching) to meet TTI/LCP budgets, p95 latency goals, and fps targets while scrolling.

You may be a fit if you have

5+ years of experience building production React + JavaScript applications, with deep knowledge of state management.
Hands-on work with complex grid/table UIs (TanStack Table, ag-Grid, Handsontable, or custom solutions).
Strong understanding of rendering performance (virtualization, windowing, event batching) and core web fundamentals (layout, paint, compositing).
Comfort working with Node.js APIs (REST), Postgres, and Elasticsearch.
A strong product sense: you care about edge cases, usability, and discoverability.

Nice to have

Experience with real-time collaboration (Yjs, Automerge, Liveblocks, WebSockets).
File handling expertise: import/export (CSV/Parquet), bulk operations, clipboard integration.
Familiarity with design systems (Radix, Headless UI), accessibility audits, and visual regression testing.
Knowledge of feature flags, product analytics (PostHog/Amplitude), and error monitoring tools.

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