Senior Software Developer / Infrastructure Engineer

YTEC

YOUR MISSION * Design and build modern React / Next.js applications that stay maintainable as they grow. * Make and defend architectural decisions — and understand the performance consequences of them. * Set front-end standards, build reusable components, and create patterns the whole team builds on. * Work closely with our back-end developers to integrate APIs and business logic cleanly. * Own quality end to end, including in production: reading logs, tracing issues, and diagnosing incidents together with our DevOps and sysadmins rather than handing them off. * Improve performance, accessibility, and overall UX across projects. * Review code, raise the bar, and help good front-enders across our teams become even better — without slowing them down. YOUR PROFILE * 5+ years in front-end development, with deep, current React and TypeScript experience. * Real production experience with Next.js — you understand rendering strategies (SSR / SSG / ISR / CSR), hydration, routing, and when to use which, not just how to scaffold an app. * A strong grasp of front-end architecture: component design, state management, and how structural choices affect maintainability, bundle size, and runtime performance. * The ability to measure and improve performance (Core Web Vitals, bundle analysis, profiling) — and to understand the cost of the trade-offs you make. * Solid experience integrating front-ends with APIs and back-end systems. * Comfort across the full lifecycle: version control, testing, debugging, CI/CD, deployment, and maintenance. * Excellent English and the confidence to work directly with product owners and clients. * Senior judgment: you know when to be rigorous and when to be pragmatic, you take ownership of outcomes, and you make the people around you better. Nice to have: Python/Django and SQL (you'll work closely with our back-end teams), real depth in accessibility, a good design sensibility, or experience setting standards within a team. WHY US? * Challenging custom software projects. * A highly skilled and technical team. * Short communication lines and little bureaucracy. * Significant influence on front-end architecture and development standards. * Opportunities to improve processes and shape the future of front-end development within the company. * A culture that values expertise, ownership, and continuous improvement. * A salary between €3000 - €5000,- based on experience. * A training budget for courses, certifications, and industry events. * 25 vacation days to ensure sufficient rest and relaxation. * An attractive (optional) pension plan in which we double your contribution. * A company laptop and phone. * Flexible working hours that you can arrange yourself. * Hybrid working is fully supported. * Fun outings with your team and the chance to challenge your colleagues to a game of table tennis, chess, or pool.

YTEC

YOUR MISSION * Define, improve, and maintain QA processes across multiple projects * Design test strategies and test plans based on project risks and requirements * Perform functional, integration, regression, acceptance, exploratory, and API testing * Identify risks early and proactively prevent quality issues * Work closely with developers, product owners, project managers, and customers * Help teams improve quality throughout the entire software development lifecycle * Contribute to test automation initiatives and quality tooling * Improve release readiness and deployment confidence * Promote a quality-first mindset within the organization YOUR PROFILE * At least 5 years of experience in software testing and quality assurance * Experience creating test plans, test cases, and test strategies * Experience with functional, integration, regression, acceptance, and exploratory testing * Experience testing APIs and backend systems * Strong analytical and problem-solving skills * Experience working in Agile/Scrum environments * Excellent communication skills in English * A proactive mindset and strong sense of ownership * Attention to detail combined with pragmatic decision-making * You genuinely care about software quality * You identify problems before customers do * You take initiative rather than waiting for instructions * You continuously improve your knowledge of testing methodologies and tools * You help developers and teams become better, not just report bugs * You can balance quality standards with practical business realities WHY US? * Challenging custom software projects * A highly skilled and technical team * Short communication lines and little bureaucracy * Significant influence on how quality is approached within the company * Opportunities to improve processes and shape QA standards * A culture that values expertise, ownership, and continuous improvement * A competitive salary based on experience * A training budget to further develop yourself through courses, certifications, an events; * 25 vacation days to ensure sufficient rest and relaxation; * An attractive (optional) pension plan in which we double your contribution; * A company laptop and phone; * Flexible working hours that you can arrange yourself; * Hybrid working is fully supported * Fun outings with your team and the chance to challenge your colleagues to a game of table tennis, chess, or pool.

TradeTracker

THIS IS YOUR ROLE As a Senior Frontend Architect, you excel at defining structure, patterns, and long-term direction for large-scale SaaS applications. You make deliberate architectural choices, set standards for code quality, performance, and maintainability, and guide others in applying them consistently. You have a strong instinct for building scalable component systems, enjoy working closely with product and design, and can translate business complexity into clean, understandable UI and application flow. In this role, you will be responsible for architecting and developing the next generation of TradeTracker’s frontend applications. You will be hands-on in establishing the foundation: project structure, modules, shared libraries, core components, design system and interface patterns. As the product evolves, you will play a key part in growing and leading the frontend team, mentoring others, reviewing code, and safeguarding architectural integrity. You will operate within our Development department and work closely with other Architects and backend teams. Together, you will help define a modern, high-performing, and maintainable frontend platform that contributes directly to the evolution of our global services. YOUR PROFILE * Industry expertise: Experience in SaaS, martech, adtech, or platforms with complex state and data flows. * Angular expert: Strong experience with Angular (preferably 4+ years on large-scale applications) in component architectures. * Frontend architecture and design systems: Ability to define and build reusable UI libraries, internal component systems, and enforce cohesive styling and interaction patterns. * State management: Efficient state management with Angular is rquired. * API integration and interface contracts: Ability to work collaboratively with backend teams (PHP) to establish clear, typed, maintainable data models and API (SOAP and REST) boundaries. WHY US? We are a great fit for a candidate who wants to be hands-on whilst taking responsibility of deliverables.  * You are both hands-on and capable of setting technical direction. * You understand the balance between developer experience, product velocity, and long-term maintainability. * You are comfortable leading code reviews, coaching developers, and raising the quality bar. * You have opinions about architectural trade-offs and the ability to explain them clearly to come to sound decisions.