• We’re looking for a passionate Backend Developer to join our growing engineering team. • You'll be working on scalable backend systems, collaborating with cross-functional teams, and shipping real products used by thousands of users. • You build and extend the pricing and matching core — the product's IP. • Pricing engine. Implement the coupled simplex maker from a precise spec. • A flow nudge (δ = 0.05) that shifts an outcome's log-odds on filled flow. • A model/flow blend q_blend = w·q_model + (1 w)·q_flow−. • A dynamic half-spread that widens with toxicity. • The workbook's four no-arbitrage checks wired as runtime assertions that halt the market and page on-call when violated. • Matching tiers (the documented build order). • Maker-risk mechanisms that run alongside matching. • You'll measure everything the way the report does.

• Lead development of key platform features across both backend and frontend. • Develop and review production code using technologies such as Laravel, PostgreSQL, and Angular/TypeScript. • Design and maintain database architecture, ensuring integrity and efficiency in a multi-tenant SaaS environment. • Collaborate with Product and TPMs to translate functional requirements into scalable technical solutions. • Diagnose and resolve complex issues across multiple systems, including editor state management, data persistence, and rendering. • Establish and maintain development standards, best practices, and architectural patterns within the team. • Actively participate in code reviews, technical design, and mentoring of developers.

Role Description Are you a motivated fullstack developer who wants to make an impact by building and operating modern web applications, owning features from idea to production, and helping shape the future of OX App Suite? Your new job: - Build and maintain Vue 3 single-page applications for COP and the core OX App Suite. - Turn customer- and brand-specific customizations into reusable, configurable and brandable components. - Develop the Node.js services behind them, including clean REST APIs and identity integrations. - Write and maintain unit and end-to-end tests, and troubleshoot infrastructure issues before blaming the application code. - Deliver features across the full lifecycle using GitLab CI/CD, containers and Kubernetes. - Work in an issue-driven development process with small merge requests, regular code reviews and lightweight agile practices. Qualifications - Several years of professional experience in fullstack web development. - A Master's degree in Computer Science, Software Engineering, or a related field. - Strong proficiency in Vue 3 and JavaScript, with a passion for building reusable, configurable and accessible user interfaces. - Experience developing Node.js backend services with clean REST APIs and identity integrations. - A pragmatic approach to testing, troubleshooting and debugging across the entire stack. - Good judgment when using AI coding assistants such as Claude Code, combined with the ability to take ownership of tasks from idea to production and a preference for simple solutions over unnecessary complexity. - Strong verbal and written communication skills in English and German. - Intrinsic motivation, a collaborative mindset, and a passion for Open Source technologies in a low-hierarchy environment. - Comfortable working in a remote-first environment with multicultural teams across different time zones. Benefits - The flexibility to work 100% remotely ensures a work environment that suits you best. - Flexible working hours that allow you to successfully combine your home and family responsibilities with work. - Getting together in-person for workshops and fun team events. - Time off to volunteer – and mental health support when you need it. - We provide financial relief through corporate benefits and a subsidy for ergonomic chairs and desks. - We can discuss further location-related benefits together in an initial talk. Company Description At Open-Xchange (OX), we develop open-source communication and collaboration software used by public sector organizations, telcos, and hosting providers to keep data secure and under their control. Our products cover email, collaboration, DNS security, and related services, and are used by millions of people worldwide. - We work in a non-hierarchical organization that empowers everyone to take responsibility, stay focused, and contribute directly to the company’s success and customer value. - We value expertise and continuous professional development. Our professionals work closely with experienced colleagues, take ownership of their work, and continuously expand their skills. - Openness and diversity are core to OX. Different perspectives, backgrounds, and ways of thinking strengthen our collaboration and help us see the bigger picture.

• Work on the core speech and voice generation experience at Synthesia. • Design and deliver features across script preview and voice orchestration stack. • Integrate with multiple Text-to-Speech (TTS) providers, building recommendation systems. • Take ownership of features from idea through to production with loosely defined requirements. • Collaborate with product, design, and AI teams to translate user problems into experiments and features. • Ship features behind flags, measure outcomes, and refine based on signals.