Einleitung For Engineers who operate at the highest level React / Next.js / Node.js / TypeScript / Cloud Architecture Hamburg or Remote (EU) | Equity Included Most engineering roles want “good developers”. This one does not. This role is for people who build systems others consider impossible. For engineers who see patterns in complexity, who design clean architectures under pressure, who question defaults and then outperform them. A hyper-scaling tech company with a category-defining platform is searching for a rare kind of Fullstack Engineer: someone who combines deep technical mastery with architectural intuition, rapid execution, and the ability to think far beyond feature boundaries. If you’re one of the few who genuinely stand out, you’ll feel at home here. What Makes This Role Unique - You’ll work in the core engineering group that pushes the platform to its next scale level. - Your architectural decisions will have immediate product and business impact. - You’ll solve challenges without templates, problems no one has solved yet. - You get real equity, because people at this level shape the company’s trajectory. This is not for developers who want comfort. This is for those who want challenge, autonomy, and mastery. Deine Aufgaben Architecture & System Engineering - Design and evolve distributed fullstack architectures using React/Next.js + Node.js - Shape API models (REST, GraphQL), data flows, and integration logic - Drive the technical vision for scalability, reliability, and long-term maintainability Fullstack Engineering Excellence - Build highly performant user interfaces with React, Next.js, HTML, CSS, JS - Develop backend services, APIs, integrations, and complex logic in Node.js - Implement advanced rendering (SSR/SSG/ISR, Server Components) - Build PWAs and contribute to native application features where relevant Performance, Observability & Scale - Engineer systems for low latency, global distribution, and resilience - Lead caching, data modeling, and optimization strategies - Ensure observability and robustness in mission-critical flows Influence & Leadership - Mentor other engineers, lead discussions, challenge assumptions - Define engineering principles, coding standards, and architectural guardrails - Collaborate closely with Product, Design, R&D, and Platform Engineering Dein Profil Who You Are (Top-Tier Only) You don’t just “know” the stack, you command it: - Deep expertise in React, Next.js, Node.js, TypeScript - Strong fundamentals in JavaScript, CSS, HTML and UI/UX best practices - Strong experience with REST & GraphQL API design - Experience with PWAs and/or native apps - Solid understanding of SQL/NoSQL systems: MySQL, MongoDB, InfluxDB - You understand system design: patterns, trade-offs, complexity - You thrive in fast-scaling environments - You learn fast. You build fast. You think ahead. And above all: You operate at a level where others come to you for clarity, structure, and direction. Benefits What Awaits You - A technically ambitious environment that pushes you to your highest level - A team of exceptional engineers, no average performers - A platform with huge growth potential and increasing complexity - Real ownership through equity participation - Hamburg HQ - A culture defined by intensity, trust, curiosity and momentum This is a place for high performers who want impact, autonomy, mastery and scale. ---------------------------------------- About the Team You’ll join a multidisciplinary engineering group that values depth, precision, and long-term thinking. Flat hierarchy, strong collaboration, high speed. A team where passion, excellence, and ambition are non-negotiable. People here don’t just develop, They build what others can’t. ---------------------------------------- If you are a top-tier Fullstack Engineer, you’ll know it. And if you are, this opportunity will speak to you immediately. Reach out and I’ll walk you through the real challenges, vision, and expectations, confidentially.

Company: Windsor.ai has been founded in 2017 in Zürich, Switzerland. At Windsor.ai, we are growing fast. We connect data from 300+ sources (Facebook Ads, Google Ads, HubSpot, Salesforce, TikTok) to 30+ destinations (Looker Studio, Google Sheets, BigQuery, Snowflake, and LLMs like ChatGPT and Claude). Our customers include Puma, Audi, UBS, Asics and many more. We are building a platform that makes it easy to connect any data source to any destination. There is more data being generated in the world every day, but the big problem is that the number of tools are also increasing so data has to be updated in multiple systems and tools. We are solving this problem. Our Team: Our team has around 15 people working remotely across Europe. We’re a highly technical team, and even our sales and marketing colleagues are comfortable writing at least some SQL. Our software engineers are specialised in backend with Python and frontend with React Product: We have built a data platform connecting to more than 300 different API’s. Big part of our work is dealing with all the complexity and variations in all the different API’s and scalability. Technology: We are mostly programming in python and using quite advanced features of python. Most common tools we use: - Python : flask, threads, pytest-xdist, pylint - Redis, postgres - Linux, docker - React, redux for frontend For Software developers we typically look for: - 4+ years of programming experience. - Good programming knowledge (OOP, mutable/immutable types etc.) - Like to work in a flat fast moving environment where you can have an impact How we work: We usually plan our work in two weeks intervals but the plan is not super strict so there might be some priorities changed during the sprint. We use Taiga, Gitlab, CI/CD lots of pytest and merge request reviews.

• Support a financial market client together with CI&T • Assist in the team's technical leadership • Perform agile, high-quality deployments • Write automated tests to ensure the quality of deliverables • Share knowledge with other developers • Strive for stability and simplicity in our daily codebase • Conduct code reviews

• Design, build, and maintain full-stack applications that power core products and platforms. • Develop responsive, high-performance user interfaces using React. • Participate in code reviews, technical discussions, and knowledge sharing across teams. • Execute full SDLC for solutions targeting both business and consumer customers. • Collaborate effectively in cross-functional teams to bring features and APIs to production. • Demonstrate strong leadership presence to inspire team members. • Comfortable with distributed systems and large datasets. • Prioritize automation to enhance efficiency wherever feasible. • Ensure compliance with observability best practices and technical design standards.