You are the architect of developer velocity. Your goal is to eliminate every second of friction in the engineering lifecycle, ensuring that a complex, multi-language (C++/Node.js) project feels as lightweight and responsive as a modern greenfield app. You don’t just manage servers; you manage the "AI-Ops" infrastructure that allows our Specialists and Staff engineers to work at 3x traditional speeds.

Tasks

• Environment Mastery: Design and maintain a "5-minute onboarding" workflow using Docker and DevContainers. You ensure that "it works on my machine" is a guarantee for every new hire.
• AI-Ops & RAG Management: Manage the team’s local AI infrastructure, including Retrieval-Augmented Generation (RAG) clusters, Cursor Skill libraries, and the custom documentation indexing that feeds our LLMs.
• The Bridge Pipeline: Automate and optimize the high-complexity compilation and hot-reload cycle between the OnlyOffice C++ core and the Node.js/JavaScript frontend.
• Autonomous CI/CD: Build "intelligent" pipelines that don't just report failures but use AI to analyze logs and automatically suggest (or apply) patches for brittle legacy build steps.
• Performance Guardrails: Implement "Continuous Profiling" in the build chain to catch 16ms frame-budget violations before code ever reaches a pull request.

Qualifications

• Advanced proficiency in Docker, GitHub Actions/Jenkins, and Makefile/CMake environments.
• Expertise in Python, Go, or Rust for building high-performance internal automation tools.
• Strong experience with Modern Web Tooling (Vite, Webpack, esbuild) and optimizing large-scale JS monorepos or project builds tests, CI/CD pipelines, dependency installation, local development workflows.
• Familiarity with managing Vector Databases or LLM self-hosting (Ollama/LocalAI) is a significant advantage.
• The AI Factor: You are the team’s "Prompt Architect" for infrastructure. You will use models like Claude Opus 4.6 Max and specialized DevOps agents to automate the "toil" of system administration, focusing your human intelligence on systemic optimizations and creating a seamless "Flow State" for the coding team.
• The Gaming Edge: We highly value experience from AAA Game Build Engineering. If you have managed the automated pipeline for complex, multi-platform assets and codebases where "Build Time" and "Asset Cooking" are primary KPIs, you have the exact DNA we need for this high-performance office suite.

Benefits

• Hybrid working model.
• Flexible working hours through trust-based working hours.
• At some locations a subsidized canteen and various free drinks.
• Modern office space with very good transport connections.
• Various employee discounts for activities and products.
• Employee events such as summer and winter parties, as well as workshops.
• Numerous training and development opportunities.
• Various health offers, such as sports and health courses.

Du bist der Architekt für Developer Velocity. Dein Ziel ist es, jede Sekunde Reibung im Engineering-Lifecycle zu eliminieren und sicherzustellen, dass sich ein komplexes, mehrsprachiges Projekt (C++/Node.js) so leichtgewichtig und reaktionsschnell anfühlt wie eine moderne Greenfield-App. Du verwaltest nicht einfach nur Server – Du verantwortest die „AI-Ops“-Infrastruktur, die es unseren Specialists und Staff Engineers ermöglicht, mit der dreifachen Geschwindigkeit zu arbeiten.

Aufgabenbereich

• Environment Mastery: Du entwirfst und betreibst einen „5-Minuten-Onboarding“-Workflow mit Docker und DevContainers. Du stellst sicher, dass „läuft auf meiner Maschine“ für jeden neuen Kollegen Realität ist.
• AI-Ops & RAG Management: Du betreibst die lokale KI-Infrastruktur des Teams, einschließlich Retrieval-Augmented-Generation-(RAG)-Cluster, Cursor-Skill-Libraries und der individuellen Dokumentations-Indexierung, die unsere LLMs speist.
• Die Bridge-Pipeline: Du automatisierst und optimierst den hochkomplexen Compile- und Hot-Reload-Zyklus zwischen dem OnlyOffice-C++-Core und dem Node.js/JavaScript-Frontend.
• Autonomes CI/CD: Du entwickelst „intelligente“ Pipelines, die nicht nur Fehler melden, sondern mithilfe von KI Logs analysieren und automatisch Patches für fragile Legacy-Build-Schritte vorschlagen (oder direkt anwenden).
• Performance Guardrails: Du implementierst „Continuous Profiling“ in der Build-Chain, um 16-ms-Frame-Budget-Verletzungen zu erkennen, bevor Code überhaupt in einen Pull Request gelangt.

Qualifikationen

• Sehr gute Kenntnisse in Docker, GitHub Actions/Jenkins sowie Makefile-/CMake-Umgebungen.
• Expertise in Python, Go oder Rust für den Bau hochperformanter interner Automatisierungstools.
• Fundierte Erfahrung mit modernen Web-Toolchains (Vite, Webpack, esbuild) und der Optimierung großer JavaScript-Monorepos.
• Erfahrung im Umgang mit Vektor-Datenbanken oder Self-Hosting von LLMs (Ollama/LocalAI) ist ein großer Pluspunkt.
• Der AI-Faktor: Du bist der „Prompt Architect“ des Teams für Infrastruktur. Du nutzt Modelle wie Claude Opus 4.6 Max und spezialisierte DevOps-Agenten, um operative Routinearbeit zu automatisieren, und konzentrierst Deine menschliche Intelligenz auf systemische Optimierungen sowie das Schaffen eines nahtlosen „Flow States“ für das Entwicklerteam.
• Der Gaming-Vorteil: Erfahrung im AAA-Game-Build-Engineering ist für uns besonders wertvoll. Wenn Du automatisierte Pipelines für komplexe, plattformübergreifende Assets und Codebases betreut hast, bei denen „Build Time“ und „Asset Cooking“ zentrale KPIs sind, bringst Du genau die DNA mit, die wir für diese High-Performance-Office-Suite suchen.

Benefits

• Hybrides Arbeitsmodell.
• Flexible Arbeitszeiten durch Vertrauensarbeitszeit.
• An einigen Standorten eine bezuschusste Kantine und verschiedene kostenfreie Getränke.
• Moderne Büroflächen mit sehr guter Verkehrsanbindung.
• Diverse Mitarbeiterrabatte für Aktivitäten und Produkte.
• Mitarbeiterevents wie Sommer- und Winterfeiern, sowie Workshops.
• Zahlreiche Weiterbildungs- und Entwicklungsmöglichkeiten.
• Verschiedene Gesundheitsangebote, wie Sport- und Gesundheitskurse.

About the role:

We are looking for a Forward-Deployed Engineer to join our Professional Services team. This is not a traditional consulting role—you will embed directly with our most strategic enterprise customers to drive transformational outcomes across frontend modernization, platform migrations, and AI adoption.

In this role, you will lead complex Next.js migrations, architect high-performance applications, and build production AI solutions—all within customer environments. You'll work hands-on-keyboard alongside customer teams, whether you're migrating a legacy React application to App Router, conducting a deep-dive code audit, or deploying production agents using Vercel's AI SDK. You will be equally comfortable leading a technical discovery session with engineering leadership as you are refactoring a complex rendering strategy or optimizing an agentic workflow.

Our Forward-Deployed Engineers operate with high agency and autonomy. You'll navigate ambiguous enterprise environments, assess technical debt, design migration strategies, and deliver measurable business value—all while building long-term relationships that expand our partnership with each customer.

You will report to the Director of Professional Services and will be remote-first with significant travel (25-40%) to customer sites for embedded engagements.

What you will do:

1. Lead complex frontend migrations—modernizing legacy React, Vue, or other frameworks to Next.js, including Pages to App Router transitions, incremental adoption strategies, and large-scale codebase transformations.
2. Conduct technical assessments and code audits, analyzing customer codebases for performance bottlenecks, architectural anti-patterns, and optimization opportunities—delivering actionable roadmaps that drive measurable improvements.
3. Architect and implement high-performance Next.js applications, leveraging App Router, Server Components, streaming, ISR, edge functions, and advanced rendering strategies to meet enterprise scale and performance requirements.
4. Optimize Core Web Vitals and application performance, using tools like Vercel Speed Insights to diagnose issues and implement fixes that improve SEO, conversion rates, and user experience.
5. Build production AI solutions using Vercel's AI SDK and AI Cloud—including conversational interfaces, production agents, MCP servers, and agentic workflows that transform customer operations.
6. Embed with strategic customers to build production applications—working within their systems, understanding their constraints, and shipping TypeScript code that goes live.
7. Drive enablement and knowledge transfer through workshops, pair programming, and documentation—ensuring customer teams can extend and maintain solutions independently.
8. Navigate complex enterprise environments by building relationships with stakeholders across engineering, product, and executive teams—translating technical capabilities into business outcomes.
9. Participate in pre-sales activities by providing technical expertise during discovery calls, scoping sessions, and proposal development for migrations, audits, and AI transformation engagements.
10. Contribute to our service evolution by identifying repeatable patterns, building reusable components, and sharing implementation insights back to Product and Engineering teams.

About you:

• 5+ years of experience in software engineering with at least 2 years in a customer-facing technical role (consulting, solutions engineering, forward deployed engineering, or technical founder experience).
• Expert-level TypeScript skills—this is your primary language. You write production TypeScript daily and have strong opinions on type safety, patterns, and tooling.
• Deep expertise in Next.js, with a proven track record of architecting and delivering complex applications using App Router, Server Components, server-side rendering (SSR), static generation (SSG), incremental static regeneration (ISR), and edge functions.
• Demonstrated experience leading frontend migrations—you've modernized legacy applications to Next.js, navigated incremental adoption strategies, and understand the challenges of migrating large codebases in production environments.
• Mastery of React and its ecosystem, including advanced state management, performance optimization, and modern patterns like streaming, suspense, and concurrent features.
• Production experience with LLMs and AI applications, including prompt engineering, agent development, and tool use patterns. Familiarity with Vercel's AI SDK is strongly preferred.
• High agency with comfort in ambiguity—you thrive when given a problem to solve rather than a task to complete, and you can navigate complex organizations to drive outcomes.
• Exceptional communication skills with the ability to conduct technical discovery, present to executives, mentor engineers, and build lasting customer relationships—all with a low-ego, collaborative approach.
• Business acumen to understand customer objectives, translate technical capabilities into ROI, and identify expansion opportunities throughout engagement lifecycles.
• Willingness to travel 25-40% to customer sites for embedded work and relationship building.

Bonus if you:

• Have led large-scale migrations from legacy frameworks (Create React App, Gatsby, custom webpack setups) to Next.js in enterprise environments.
• Have expertise in performance optimization and Core Web Vitals, with experience diagnosing and fixing LCP, CLS, and INP issues at scale.
• Have experience with Model Context Protocol (MCP), building MCP servers, or implementing complex tool-use patterns in production AI applications.
• Have led enterprise AI transformation initiatives, including building production agents that automated manual processes or replaced legacy systems.
• Have worked with micro-frontends, module federation, or multi-team frontend architectures.
• Have contributed to the Next.js, React, or AI SDK open-source projects, or maintain popular related libraries.
• Have experience with enterprise deployment patterns including security reviews, compliance requirements, and multi-region architectures.
• Have a background in financial services, healthcare, retail/e-commerce, or media—industries with complex frontend ecosystems and growing AI adoption.
• Have spoken at conferences or published thought leadership on frontend architecture, migrations, or AI applications.

Benefits:

• Great compensation package and stock options.
• Inclusive Healthcare Package.
• Learn and Grow - we provide mentorship and send you to events that help you build your network and skills.
• Flexible Time Off - Flexible vacation policy with a recommended 4-weeks per year, and paid holidays.
• Remote Friendly - Work with teammates from different time zones across the globe.
• We will provide you the gear you need to do your role, and a WFH budget for you to outfit your space as needed.

Senior Frontend Engineer (Angular) – Greenfield Product

Castle Tech GmbH – Berlin or Munich (Hybrid)

We are building a new standalone product from the ground up and are looking for a Senior Frontend Engineer to help shape it.

This is a high-impact role where you will influence system design, architecture, and product direction from day one. You will work closely with product and engineering to turn ideas into production-ready software while setting the foundation for how the system evolves.

If you enjoy building products from scratch, designing clean architectures, and taking ownership of meaningful projects, this role will allow you to make a real impact.

What You’ll Work On

• Build a new production-grade product from the ground up

• Design and implement a scalable frontend architecture using Angular and TypeScript

• Take ownership of features from concept to deployment

• Collaborate closely with product managers, designers, and backend engineers

• Contribute to technical architecture and system design decisions

• Help establish development standards, CI/CD pipelines, and engineering best practices

• Mentor other engineers through code reviews and technical feedback

• Continuously improve development workflows using modern tools and AI-assisted engineering

AI-Augmented Engineering

AI is part of how we work. We expect engineers to actively use modern AI tooling to improve productivity and quality.

You should be comfortable:

• Using AI-assisted development tools in your daily workflow

• Writing effective prompts and evaluating AI-generated output critically

• Identifying AI limitations and failure modes

• Exploring modern AI workflows and tools

This is not about blindly accepting AI suggestions — it’s about using AI thoughtfully to work smarter and build better systems.

Your Skills

Must Have

• 5+ years of experience as a frontend engineer

• Strong expertise with Angular (v11+) and TypeScript

• Experience designing scalable frontend architectures

• Strong understanding of software design principles and maintainable systems

• Experience with modern frontend tooling (NPM, Webpack or esbuild)

• Experience working with Git, CI/CD pipelines, and Docker

• Experience working in agile teams (Scrum or Kanban)

• Strong communication skills in English

Nice to Have

• Experience with frontend testing frameworks (Jest, Cypress, Playwright)

• Experience building greenfield products or new platforms

• Familiarity with AI-related components such as RAG or vector databases

• Experience with Material Design or product-oriented UI development

• Conversational German

What You’ll Own

As a Senior Engineer, you will play an important role in shaping both the technology and the team.

You will:

• Design systems with clear component boundaries and scalability in mind

• Identify technical risks and propose practical solutions

• Help improve the team’s engineering standards and productivity

• Mentor other engineers and contribute to technical decision-making

• Deliver high-impact features that support business and product goals

Why Join Castle Tech?

• Build something new – work on a greenfield product from the start

• Real technical ownership – influence architecture and system design

• Modern engineering environment – use the latest tools and workflows

• Flexible hybrid work – office and remote options in Berlin or Munich

• Your gear, your choice – MacBook or Windows setup with the tools you need

• Growth and development – structured onboarding, feedback cycles, and coaching

• Collaborative team – ambitious engineers who enjoy building great products

If you're excited about building a new product, shaping architecture, and working with a modern engineering team, we’d love to hear from you.

Team

For further development and expansion of our successful business, Raisin is looking for highly motivated, smart, and driven engineers to complement our team in Berlin. As a (Senior) Frontend Infrastructure & Tooling Engineer, you will work alongside our development teams to ensure a highly automated software development life-cycle, as well as enable them to deploy modern Frontend applications to the Cloud using Continuous delivery practices. As part of our Tech Platform tribe, you will work with cutting-edge technologies and initiatives that shape the vision of our Frontend Platform, assisting our product and development teams to stay highly productive.     

We are looking for someone with a strong software engineering experience, who seeks an opportunity to help other engineers solve complex problems using Platform Engineering practices. You will take full ownership of your work, from design to infrastructure, and are expected to challenge the status quo as a key work and culture component.

Your Responsibilities

• As an experienced Frontend Engineer, you will be providing a significant impact on our customers’ experience with Raisin product by optimizing Frontend applications for performance and scalability
• You will drive internal platform efforts, improving development tools and Frontend ecosystem according to modern principles
• You will contribute to building the development infrastructure used by stream-aligned teams, and drive different automation and integration projects with regard to the latest technology
• You will research, assess, develop and maintain new technology solutions for our Frontend Platform
• You will provide stable automated solutions for our internal customers to speed up product testing and delivery
• Nurture teams to strive for test automation and quality assurance throughout the development process
• You will own, maintain and continuously evolve a large-scale Frontend monorepo, ensuring its scalability, reliability and long-term sustainability
• You will own, optimise and scale the shared CI pipeline, improving build performance, stability and developer productivity across teams
• Act as a “Frontend First Aid” point of contact, proactively unblocking engineers on infrastructure, platform and build-related issues
• You will continuously enhance the developer experience by streamlining workflows, reducing friction and introducing improvements across the Frontend toolchain
• Drive architectural decisions together with the team, shaping the evolution of the Frontend platform in alignment with engineering standards and long-term strategy

Your Profile

• You hold a university degree in Computer Science or related fields or equivalent practical experience
• You bring 3+ years of experience as a Frontend or Full Stack engineer
• You can demonstrate proficiency in TypeScript, JavaScript, CSS, and HTML
• You have strong experience with React or similar frameworks/libraries
• You are familiar with CSS-in-JS like styled-components
• Experience with Next.js, Static Site Generators, the JAM-Stack, (headless-) Content Management Systems and material-ui is a huge plus
• You can show experience working with automated testing frameworks like Jest
• You have hands-on experience with micro-frontend architecture and monorepo setup
• You have a good understanding of Frontend build tools and bundlers like Webpack, Rollup, Babel
• You are devoted to quality and adhere to best practices within the JavaScript community
• You have a strong passion for Platform Engineering practices and have hands-on experience with modern CI/CD and automation for Frontend
• You feel comfortable and confident driving on participating in technical and architectural discussions
• You are an open-minded and creative team player who is eager to contribute to the ongoing improvement of our technology and culture
• You have great English communication skills

Join our mission, join our team – and grow with us!

At Raisin, we care about each other and it is one of our top priorities to foster an open and caring environment in which everyone feels welcome and comfortable. Our culture is strongly driven by our ambitious team, which connects more than 75 different nationalities.

As part of our team, you will benefit from:

• Employee Development Budget of €2,000 and four full training days per year.
• Flexible working hours, home office and 30 vacation days.
• A company pension scheme (Betriebliche Altersvorsorge), which we support with 20%.
• Enjoy more than 50+ different sports with Urban Sports Club: We subsidize your membership with more than €20 per month. 
• Do you miss being in the office? The Deutschland Ticket gets you there, which we subsidize with €25 per month.
• Love cycling? With JobRad, lease the bike of your choice and enjoy tax savings, plus Raisin covers your monthly insurance costs.
• Hungry all the time? Snacks, daily fresh fruit as well as drinks provided at the office.
• You are moving from another country or city to join us? We may support your relocation.

At AKQA (part of WPP), we believe in the imaginative application of art and science to create beautiful ideas, products, and services. With an entrepreneurial and collaborative approach, we design adaptive digital experiences that capture the imagination and deliver meaningful impact for our clients.
Our Technology teams operate at the intersection of creativity and engineering, building innovative platforms for some of the world’s most iconic brands. We combine technical excellence with experimentation and craft, delivering scalable, future-facing solutions in close collaboration with Creative, Strategy, and Delivery. 

As a Senior Frontend Developer, you will play a key role in building modern, composable digital platforms. You will work hands-on with cutting-edge technologies and collaborate across disciplines to deliver high-impact, scalable experiences for global clients.

Your role will be hands-on but also inspiring others to form an exemplary technical team. You will work closely with others to ensure good collaboration across all disciplines and to facilitate the solving of day-to-day challenges. As such, we are looking for a skilled Senior Web Developer who is not only a collaborative leader and proactive problem-solver but also embodies a comprehensive technical mastery honed over 6+ years of frontend or full-stack development in agency, product, or enterprise-scale environments, demonstrating a proven track record of delivering scalable digital products.

ROLE REQUIREMENTS

• Build and maintain scalable frontend applications using Next.js (v15) and modern React patterns.
• Work within a composable architecture, seamlessly integrating CMS (e.g., Contentful), commerce (e.g., commercetools), and various APIs.
• Contribute to and evolve a Backend-for-Frontend (BFF) layer, often within Next.js.
• Translate creative concepts into performant, accessible (WCAG), and production-ready experiences.
• Develop component-driven UIs aligned with design systems (e.g., Storybook, design tokens).
• Collaborate effectively with design, backend, and product teams across international AKQA studios.
• Optimize applications for exceptional performance, SEO, accessibility, and scalability.
• Contribute to architectural discussions and support the implementation of scalable frontend patterns.
• Prototype and implement AI-powered features, including search, personalization, and conversational UI.
• Mentor junior developers and actively contribute to engineering best practices and knowledge sharing.

QUALITIES & CHARACTERISTICS

• Exceptional Frontend Engineering Prowess: You possess deep proficiency across the core frontend stack:
• Languages & Styling: HTML5, CSS3 (including modern styling like TailwindCSS), JavaScript (ES6+), and TypeScript.
• Frameworks & Architecture: Hands-on experience with ReactJS and Next.js (App Router, SSR, SSG, edge rendering), excelling in building component-driven architectures and reusable UI systems.
• Quality & Performance: You ensure optimal performance, accessibility (WCAG), and SEO, leveraging familiarity with Storybook and design system workflows.
• Strategic Composable Architecture & Platform Thinking: You have proven experience working with headless CMS (e.g., Contentful), composable commerce setups (e.g., commercetools), and API-driven architectures. You understand BFF patterns, API orchestration, and can skillfully integrate distributed systems.
• Forward-Thinking AI & Emerging Technologies Integration: You have a practical interest or experience in integrating AI capabilities into frontend applications, understanding RAG (Retrieval-Augmented Generation) patterns and how frontend systems interact with LLM-powered services. You have exposure to AI-driven search, personalization, or conversational interfaces and can prototype such features with awareness of performance, privacy, and UX implications.
• Proficiency in AI-Assisted Development & Tooling: You are skillful in using modern AI-assisted development tools (e.g., Cursor, GitHub Copilot) to accelerate workflows including code generation, refactoring, debugging, and documentation, always maintaining high code quality, security, and maintainability. You are curious to explore and adopt emerging developer tooling that enhances team efficiency and delivery speed.
• Robust Backend & Integration Acumen: You possess working knowledge of Node.js and API integration, including collaborating on API contracts and data models, and a clear understanding of how the frontend integrates with various search platforms, CMS, and backend services.
• Excellence in Build, Deployment & Quality: You exhibit experience with modern build tools (Webpack, Vite, Turbopack) and a familiarity with deployment platforms (Vercel, AWS, Cloudflare), coupled with an unwavering focus on code quality, testing, and production readiness.
• Strong Collaboration & Communication Skills: You are able to clearly communicate complex technical concepts to both technical and non-technical stakeholders. You thrive in cross-functional, design-led environments, are proactive, solution-oriented, possess strong attention to detail, and are comfortable working across distributed international teams.
• Leadership & Mentorship Mindset: You are passionate about doing what’s right for our clients, understanding their business goals, and effectively able to teach, coach, and mentor other team members, contributing to engineering best practices and knowledge sharing.
• Adaptive & Agile Approach: You are a self-starting technologist who can draw parallels across a technology landscape, aren’t restricted by a specific skillset, and understand Lean and Agile methodologies to optimize team efficiency, identifying and resolving bottlenecks.

Familiarity with search platforms (Algolia, Coveo), exposure to enterprise CMS ecosystems (AEM), experience with edge computing and CDN strategies, or analytics/experimentation platforms would be an added advantage.

Explore our extensive range of benefits here.