Role Description - Build and maintain Next.js + TypeScript applications with clean, maintainable, and well-structured code. - Implement responsive, accessible, and visually appealing UI/UX components. - Integrate securely and efficiently with our backend NestJS API (REST + WebSockets). - Apply state management best practices using tools like Redux, Zustand, or React Query. - Implement client-side validation for a smooth user experience. - Follow Next.js best practices (routing, SSR/SSG, data fetching, API routes, component architecture). - Optimize performance for web and mobile responsiveness. - Handle error states, loading states, and edge cases gracefully. - Deploy and maintain projects on Vercel. - Write and maintain meaningful tests (unit, integration, or E2E). - Document code, design decisions, and deployment steps in README. Qualifications - Proven experience in Next.js and TypeScript. - Strong grasp of modern React (hooks, context, suspense). - Solid understanding of UI/UX principles. - Experience integrating APIs with error handling and validation. - Knowledge of state management libraries (Redux, Zustand, Jotai, or similar). - Familiarity with Git-based workflows and CI/CD pipelines. - Strong problem-solving and communication skills. - Bonus: Experience with Tailwind CSS, ShadCN UI, and Vercel deployments. Requirements - Experience with ShadCN UI, Framer Motion, or other modern UI animation libraries. - Knowledge of Tailwind CSS design systems and responsive design patterns. - Familiarity with internationalization (i18n) for multilingual interfaces. - Experience integrating real-time features via WebSockets or Socket.IO. - Knowledge of accessibility (WCAG) best practices. - Familiarity with frontend performance optimization (Lighthouse, Core Web Vitals). - Experience building SEO-friendly Next.js pages (SSR/SSG, metadata). - Comfort with design tools like Figma for collaboration. - Previous experience in EdTech or SaaS products. - Knowledge of analytics integration (Google Analytics, Mixpanel). Company Description COREnglish stands at the forefront of global online education and serves as a prominent resource for recruiting educators for schools across Asia.

mika is revolutionizing financial management for small businesses with an AI-powered platform that combines automated accounting, proactive insights, and conversational AI. We're on a mission to make expert financial navigation and compliance accessible to every small business owner – dramatically reducing costs and bureaucratic burden. We're a small, senior team shipping fast, and every line of code we ship matters. Our stack: FastAPI & Django backend, React frontend (Material UI, react-query), PostgreSQL, AWS. We build agentic AI systems that do real accounting work. Tasks We need a Senior Full-Stack Developer who leans frontend – someone who makes our product look and feel as good as it works under the hood. You'll own features end-to-end. That means you think through the entire user flow, edge cases, error states, and architecture before you start building. You work with high autonomy and take real ownership – we trust you to make good decisions and deliver clean solutions. Concretely, you'll: - Drive frontend improvements – not just fixing bugs but proactively elevating UX and visual quality on a regular cadence - Build and own complex full-stack features in our accounting platform - Use Claude Code, Cursor, or similar AI engineering tools as your primary development workflow – we are a senior team where everyone writes high-quality code at a high pace, and this is only possible through the use of the latest coding tools. You'll get access to all the subscriptions you need to work efficiently - Adapt and extend our Python/FastAPI & Django backend where needed (CRUD-level changes and beyond) - Contribute to code quality and architecture decisions in a small senior team Requirements - Professional experience in software development with a proven track record of owning and delivering complex projects. - Expertise in React to build high-quality, accessible, and production-ready user interfaces. - A sharp eye for design that ensures layouts and components are implemented with pixel-perfect accuracy. - Hands-on skill with AI-assisted engineering using tools like Cursor, Claude Code, Codex, or GitHub Copilot. You have already built real things with those tools. - The ability to work across the stack by independently navigating and extending a Python/FastAPI backend. - A systems-thinking mindset to map out full features, edge cases, and failure modes before writing any code. - Fluency in English, while any knowledge of German is a welcome bonus. Nice to have: - Background in agentic AI systems or LLM-powered products. - Familiarity with B2B fintech, PostgreSQL, or German accounting standards like DATEV. Benefits - A small team of strong, senior engineers who respect each other's time. - Real autonomy and ownership from day one. - Work that's genuinely hard and interesting – German tax law + AI agents is not a solved problem. - Competitive salary and a product that's actually used by real customers daily. - Almost no meetings – on average 95% focus time per day. - 100% Remote option, option to work abroad and no minimum required office attendence. - Fully flexible working hours apart from Daily Standup. - Berlin location preferred but remote possible.

About the Company At Delta, we are re-imagining and re-building the financial system. Join our team to make a positive impact on the future of finance. 🎯 Mission Driven: Re-imagine and re-build the future of finance. 💡 Most innovative cryptocurrency derivatives exchange. With a daily traded volume of ~$0.5billion, and increasing. Delta is bigger than all the Indian crypto exchanges combined. 📈 Offer the widest range of derivative products and have been serving traders all over the globe since 2018 and growing fast. 💪🏻  Founding team is comprised of IIT and ISB graduates. Business co-founders have previously worked with Citibank, UBS and GIC; and our tech co-founder is a serial entrepreneur who previously co-founded TinyOwl and Housing.com. 💰 Funded by top crypto funds (Sino Global Capital, CoinFund, Gumi Cryptos) and crypto projects (Aave and Kyber Network). Skillset - You primarily identify as a senior frontend engineer and are comfortable working on the client-side using React, Typescript/JavaScript, HTML, and CSS. - You have a minimum of 5 to 10 years of professional experience and have shipped code to production recently and regularly. - You are fluent in using the tools of the trade: Editors, Git, Command line, Slack, Jira etc. - Strong proficiency in building high-performing real-time web/mobile applications using React. With emphasis on good state management patterns and component design patterns for re-usability and maintainability. - You can build features from scratch which are modular and scalable. You don’t hesitate to take them from design to implementation. You understand nuances of web performance enjoy tweaking javascript and build process for the best end user experience. - You are driven, care about turning in quality work which is beautiful, performant and responsive with good test coverage. - Bonus: You have experience in developing apps/web using React Native.

Role Description Vous rejoindrez l’équipe frontend en tant que Tech Lead pour structurer, accompagner et faire monter en compétences les développeurs, tout en contribuant activement au code. Vos missions - Leadership technique - Définir et faire évoluer l’architecture frontend en lien avec les besoins produit - Garantir la cohérence technique des développements et la qualité du code (revues de code, pair programming) - Participer aux choix technologiques et challenger les solutions en place - Être garant de la clean architecture adaptée au contexte Gatewatcher - Développement - Contribuer au développement des fonctionnalités en React / TypeScript - Maintenir et faire évoluer le state management (Redux en normalized state pour le state applicatif, React Query pour le server state) - Développer et enrichir la bibliothèque de composants interne exposée via Storybook, en collaboration étroite avec l’UI/UX designer - Écrire et maintenir les tests end-to-end avec Cypress et les tests unitaires / d’intégration avec Vitest - Accompagnement de l’équipe - Encadrer techniquement les 2 développeurs frontend : mentoring, montée en compétences, feedback régulier - Faciliter la collaboration avec l’UI/UX designer pour assurer la cohérence entre le design system et son implémentation - Animer le chapitre frontend : partage de bonnes pratiques, veille technique, harmonisation des standards entre équipes - Participer activement aux rituels Scrum (sprint planning, daily, rétrospective) au sein d’équipes pluridisciplinaires - Participer à l’amélioration continue des pratiques (CI/CD, conventions, documentation) - Industrialisation - Maintenir et améliorer la pipeline CI sur GitLab - Veiller à la performance, l’accessibilité et la maintenabilité des interfaces - Mettre en place des métriques de qualité et des bonnes pratiques de monitoring front Company Description