Senior Frontend Engineer

Job not on LinkedIn

🔥 10 minutes ago

🇪🇺 Europe – Remote

⏰ Full Time

🟠 Senior

💻 Frontend Engineer / Web Developer

👻 Ghost score 10%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Aiphoria

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2022

💼 Consulting

📦 Logistics

📣 Marketing

💰 $34M Series A - Aiphoria on 2025-07

Consulting • Logistics • Marketing

Aiphoria is a provider of AI-driven virtual employees and a proprietary platform that automates multi-channel customer-facing and back-office tasks. Its Aiphoria Pros are multilingual, multi-modal agents (voice, chat, email, calls) that handle support, sales, collections, legal, HR and marketing workflows for enterprise customers in industries such as banking, telecom and e‑commerce. The company offers cloud and on‑prem deployments, analytics and open-architecture integrations to reduce human labor, improve response times and boost customer satisfaction.

📋 Description

• Build and evolve React interfaces for an AI agent platform, including conversation and prompt engineering tools, graph-based collaborative flow builders, agent configuration and testing interfaces, and call analytics dashboards • Own and develop the BFF layer on NestJS, aggregating REST microservices through typed clients generated from OpenAPI • Handle authentication, pagination, streaming, and error contracts to keep the frontend layer thin • Contribute to backend development with PostgreSQL and Redis • Drive the evolution and consistency of the frontend component ecosystem • Consolidate legacy Ant Design components into a design system built on Mantine • Own the shared UI library and Storybook and keep multiple product applications consistent • Ensure product quality through Vitest unit/component tests and Playwright end-to-end and critical user-flow testing, including SDK functionality • Collaborate across teams and product v-teams on API contracts, SDK protocols, code reviews, bug fixes, QA support, and test scenarios • Partner with the documentation team to create and maintain integration guides and practical code examples

🎯 Requirements

• 6+ years of professional experience in frontend/full-stack product development • 5+ years of React in production • Strong senior-level expertise in TypeScript, including strict mode, React 19, Vite, and monorepos • 2+ years of Node.js development on the server • Hands-on experience building and operating BFF or API gateway layers • Understanding of service aggregation, authentication, pagination, error contracts, and clear BFF boundaries • Strong production experience in microservice environments, ideally working with 10+ services • Experience building complex, stateful UIs such as graph/canvas editors or collaborative interfaces • Experience with undo/redo, optimistic updates, conflict handling, and non-trivial state management • Frontend architecture and code organization skills; familiarity with FSD or modular/layered architectures • Product sense and autonomy in making UI and UX decisions from product context and an existing design system • Hands-on experience writing and maintaining unit/component tests with Vitest • End-to-end testing experience with Playwright • Experience with React Query, Socket.io, Prisma, and PostgreSQL • Hands-on experience with AI-assisted development tools such as Claude Code, Cursor, Codex, GitHub Copilot, or similar • Experience with NestJS is a strong plus • Experience owning or maintaining shared component libraries or migrating legacy UIs to new design systems is nice to have • Experience with Yjs, Automerge, operational transforms, WebRTC, SIP, Kubernetes, Helm, OpenTelemetry, Prometheus, Prisma, Kysely, or PostgreSQL query optimization is nice to have • Domain experience in voice AI, telephony, contact centers, conversational AI, or LLM-based products is nice to have

🏖️ Benefits

• The team has built award-winning AI products for tech corporations - devices, voice assistants, products that are actually in the world • Cutting-edge tech stack: Speech Technologies, NLP, Generative AI (LLMs, diffusion models), voice-first agentic architecture with privacy-first and on-premises deployment • High engineering bar and real ownership - the team cares about what actually works in production, not what looks good in a demo, and you'll see the impact of your work directly • Fast career progression - a senior-heavy team and a high volume of real problems means you grow faster than you would anywhere else • Startup pace with enterprise stability - real clients, real revenue, no bureaucracy • Fully remote across Europe • 21 vacation days + public holidays + 5 sick days • Private English lessons via Preply