• Conduct research and assessments, and recommend efficient, robust software solutions tailored to client needs • Deliver high-quality, requirement-compliant code with a strong focus on performance • Proactively identify areas for improvement in existing applications and lead refactoring efforts • Collaborate closely with software engineers, product owners, team managers, and clients • Provide technical consulting to clients to ensure solutions meet their requirements • Mentor colleagues to develop their skills and knowledge

• Utilizar boas práticas de programação; • Escrever códigos eficientes e limpos; • Aplicar os principais design patterns, padrões de projeto e arquitetura; • Discutir possíveis soluções entre os times de UX, Back-end e Mobile; • Automatização de testes.

Role Description - Utilize your expertise to design, develop, test, deploy, maintain, and improve our software. - Produce code that follows high quality standards and take full ownership of your work. - Translate mockups from designers into performant React components and applications. - Contribute to solutions design, create, update, improve product architecture and optimize product performance. - Review, maintain and refactor to meet the requirements for improved or new features. Qualifications - Bachelor of Science degree or equivalent. - 2+ years of experience developing with React, preferably with TypeScript. - Production value and attention to detail are required. - Experience in communicating with cross-functional and technical teams, as well as product management to collect requirements, describe software product features, technical designs, and engineering/product strategy. - Relevant experience in Webpack, NPM, Yarn. - Basic understanding of CSS Modules, SASS and component libraries such as Ant Design. - Background in building complex user-facing features, and writing well-structured, efficient, and maintainable code. Benefits - Flexitime without core working time. - 30 days holiday. - Good work-life balance due to mobile working/workation options. - Individual support with regular training opportunities. - Working in international teams. - Option to use Jobrad, Wellpass, Deutschlandticket and corporate benefit.

Role Description Our client is looking for a Senior Frontend Engineer to build and maintain a new educational assistant product, automate end-to-end flows with Playwright, and develop the UI platform that powers the user experience. - Build and maintain the frontend layer for a new product inside an existing platform. - Work on the UI platform: shared components, patterns, and internal tooling to ship faster and keep UX consistent. - Build responsive chat experiences with both text and voice modes. - Design and optimise high-frequency real-time React state for smooth text streaming and interruptible two-way voice communication with LLMs. - Work with forms, dropdowns, charts, file uploads with graceful fallbacks. - Improve reliability and performance, optimise rendering and user flows. - Own technical decisions for frontend architecture. - Collaborate closely with product managers, designers, and backend engineers to deliver impactful features. - Develop Component and unit tests and Playwright E2E tests that validate main business flows, catch regressions early, and keep the product reliable. - Own features end-to-end: implementation, testing, monitoring signals (errors, user-reported issues), and continuous improvements. - Help establish engineering best practices, code quality standards, and technical documentation as the team scales. Qualifications - 6+ years of commercial experience in Frontend development. - Proficiency in modern React JS. - Proficiency in TypeScript. - Experience with agentic assistants and their typical UX patterns. - Form handling with React Hook Form + schema validation (e.g. Zod). - Charting/data visualisation (Recharts, visx, D3, or similar). - Experience with a server-state/data-fetching library (TanStack Query / React Query, SWR, or RTK Query): caching, invalidation, polling, and optimistic updates. - Strong CSS fundamentals: responsive layout (flexbox/grid), CSS custom properties, and a styling system (CSS Modules, Tailwind, or CSS-in-JS), as well as cross-browser behaviour. - Proven expertise in real-time React state for streaming AI: token streaming (SSE / fetch streams) and low-latency, interruptible bidirectional voice using WebRTC and/or WebSockets, the Web Audio API (AudioWorklet, media capture), and voice-activity/barge-in handling. - Hands-on experience with browser audio: getUserMedia, Web Audio / AudioWorklet, echo cancellation, voice-activity detection, and barge-in/interruption (cancelling in-flight TTS when the user starts speaking). - Ability to write maintainable architecture: clear abstractions, shared UI platform components, and good engineering hygiene. - Strong focus on security and data privacy (PII handling, tokens, safe storage practices). - Strong ownership: ability to do independent research, solve problems, and unblock yourself autonomously. Requirements - Accessibility for conversational UIs: live-region streaming, captions/transcripts for voice, keyboard and screen-reader support. - Knowledge of observability for frontend: Sentry, logging, analytics events, debugging production issues. - Startup experience where autonomy, ownership, and speed matter. - Knowledge of CI/CD pipelines and containerisation with Docker. - Expertise with subscription-based or B2B/B2C SaaS businesses. Benefits - Market salary. - 20 workdays/year paid vacation. - Full-time remote work with flexible working hours. - Fast-paced, product-driven environment with real ownership and autonomy. - Opportunity to shape architecture and tech stack in a VC-backed startup from the early stages. - Close collaboration with a strong product team (PM, Design, Growth). - A culture of transparency, minimal bureaucracy, and quick decision-making. - Smart, ambitious teammates who value impact over process.