Full Stack Developer - UX (Europe)

iDelsoft

Remote, Afghanistan; Albania; Algeria; Andorra; Angola; Antarctica; Armenia; Austria; Azerbaijan; Bahrain; Belarus; Belgium; Benin; Bosnia and Herzegovina; Botswana; Bouvet Island; Bulgaria; Burkina Faso; Burundi; Cabo Verde; Cameroon; Central African Republic; Chad; Comoros; Congo; Congo, The Democratic Republic of the; Cook Islands; Croatia; Curaçao; Cyprus; Czechia; Côte d'Ivoire; Denmark; Djibouti; Egypt; Equatorial Guinea; Eritrea; Estonia; Eswatini; Ethiopia; Faroe Islands; Finland; France; French Guiana; French Southern Territories; Gabon; Gambia; Georgia; Germany; Ghana; Gibraltar; Greece; Greenland; Guadeloupe; Guernsey; Guinea; Guinea-Bissau; Heard Island and McDonald Islands; Holy See (Vatican City State); Hungary; Iceland; Iran; Iraq; Ireland; Isle of Man; Israel; Italy; Jersey; Jordan; Kazakhstan; Kenya; Kosovo; Kuwait; Kyrgyzstan; Latvia; Lebanon; Lesotho; Liberia; Libya; Liechtenstein; Lithuania; Luxembourg; Madagascar; Malawi; Mali; Malta; Martinique; Mauritania; Mauritius; Mayotte; Moldova; Monaco; Montenegro; Morocco; Mozambique; Namibia; Netherlands; Niger; Nigeria; North Macedonia; Norway; Oman; Palestine, State of; Poland; Portugal; Qatar; Romania; Rwanda; Réunion; Saint Barthélemy; Saint Helena, Ascension and Tristan da Cunha; Saint Martin (French part); Saint Pierre and Miquelon; San Marino; Sao Tome and Principe; Saudi Arabia; Senegal; Serbia; Seychelles; Sierra Leone; Sint Maarten (Dutch part); Slovakia; Slovenia; Somalia; South Africa; South Sudan; Spain; Sudan; Svalbard and Jan Mayen; Sweden; Switzerland; Syrian Arab Republic; Tajikistan; Tanzania; Togo; Tunisia; Turkey; Turkmenistan; Uganda; Ukraine; United Arab Emirates; United Kingdom; Uzbekistan; Western Sahara; Yemen; Zambia; Zimbabwe; Åland IslandsRemotePosted 4 days agoFull-timeMid level

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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.

Originally posted on Himalayas

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