Senior React Frontend Developer

ALGOTEQUE is an IT consultancy firm that helps startups, mid-sized and large corporations to create and deliver innovative technologies. Our team has a successful track record in designing, developing, implementing, and integrating software solutions (AI, ML, BI, Web, Automation) for Telecom, Energy, Bank, Insurance, Pharma, Automotive, Industry, e-commerce. We deliver our services both in fixed-price and time-and-materials models, helping our customers achieve their business and IT strategies. Job Description We are hiring for our client – a growing company undergoing a major software modernization initiative – for a Senior React Frontend Developer to join their team. Location: Almere, Netherlands (Hybrid). Company: Confidential (details shared at later stage) Location: Almere, Netherlands (Hybrid) Position: Senior React Frontend Developer About The Role Our client is in the midst of a major software modernization initiative – completely dismantling their legacy platform in favor of a scalable, modern ecosystem built on React, Next.js, and AWS. They are looking for a frontend engineer with a deep understanding of web fundamentals (native browser mechanics, DOM manipulation, complex state management, performance optimization), who will also lead the adoption of AI Spec-Driven Development (SDD) across the team. Key Responsibilities Spearhead the legacy platform modernization – architect and lead the frontend rebuild into a modern React/Next.js environment Champion AI Spec-Driven Development – eliminate ad-hoc "vibe coding" in favor of structured AI workflows built on comprehensive specification frameworks Draft and maintain living specs – own the full SDD lifecycle: writing project constitutions, defining feature intent, translating requirements into technical architecture, and orchestrating AI implementation Design scalable, modular frontend architecture that integrates seamlessly with AWS infrastructure Act as the strategic gatekeeper for AI-generated code (Copilot, Claude, Gemini), ensuring it adheres strictly to specifications and enterprise-grade quality standards Mentor and upskill mid-level engineers – both in elite React patterns and spec-first AI development methodology Profile / Requirements Core Requirements (Critical): 🚨 Expertise in React and AI Spec-Driven Development – hands-on experience (or deep theoretical mastery) of spec kits and spec-first methodologies; ability to lock in constraints, edge cases, and architecture before any AI-generated code is produced 🚨 Leadership & Team Enablement – proven track record of leading from the front, with the communication skills to mentor and elevate the entire engineering team 5+ years of experience – unrivaled expertise in React, modern JavaScript/TypeScript, and Next.js; deep mastery of performance optimization, complex state management, and web fundamentals Migration mastery – battle-tested experience breaking down and migrating large legacy monoliths into modern, component-driven architecture Systems thinking – pragmatic, architectural mindset; understanding of AI as an execution engine, with the human engineer providing the master blueprint Nice To Have Strong familiarity with deploying containerized or serverless frontend applications on AWS Knowledge of or experience with microfrontend architectures (Webpack Module Federation, single-spa) Familiarity or hands-on experience with React Native for cross-platform mobile development Why This Role? A rare opportunity to be at the bleeding edge of AI-native engineering – not just building React components, but writing the playbook for automated, spec-driven workflows that enable rebuilding complex enterprise software with speed, precision, and power. Do you have experience with spec-driven tools (e.g. spec kit, structured prompting for AI agents), or have you led migrations of large legacy systems? If this sounds interesting, please send me your CV in English 🙂 We'll get back to selected candidates with next steps. 🙌 AO4296