Full Stack Developer Senior

Full Stack Developer Senior at Shakers We’re looking to take the Product Team to the next level in Valencia or Madrid. Base Pay Range The salary range for this position is between 35,000€ and 51,750€ OTE (on target earnings) gross annual salary. It consists of: Between 35,000€ & 45,000€ fixed salary Up to 6,750€ quarterly bonus based on performance & potential and Shakers global results (15%) Team and Role Full Stack Developer Senior on the Product Team, responsible for building a marketplace using Node.js and Next.js. Responsibilities Your day‑to‑day as a Full Stack Developer: Service & API Development: Architect, build and maintain scalable, reliable backend services in Node.js (e.g. NestJS) and server‑side applications with Next.js. Microservices & Event‑Driven Systems: Design and implement microservices architectures and event‑driven pipelines (Kafka or similar), ensuring loose coupling, high performance, and resilience. Frontend Collaboration: Partner with UI/UX designers to build responsive, high‑quality pixel‑perfect frontends using React, Vue, or Angular, and integrate with our RESTful and GraphQL APIs. Performance & Quality: Optimize load times, bundle sizes, and user interactions. Agile & DevOps: Champion our “Shakers Agile” methodology—own your GitLab workflow, write tests, enforce CI/CD best practices, and automate where it makes sense (AWS EC2/S3/CloudFront/Lambda). Architecture & Quality: Apply Hexagonal Architecture, Domain‑Driven Design (DDD), Clean Code, and SOLID principles to ensure a maintainable codebase. Security & Compliance: Implement authentication/authorization (JWT, OAuth), enforce data protection, and integrate code‑quality/security tools (SonarQube). What we’re looking for Experience: 4+ years of professional development experience—we’re looking for real, on‑the‑job product work, not internships or bootcamps. Bonus if you’ve shipped features at another product‑focused company. Education: Bachelor’s degree in Computer Science, Telecommunications Engineering, Mathematics or a closely related STEM field. Technical Expertise Real experience building full‑stack applications with Node.js, Next.js, Vue/Angular, or similar. Proven experience designing RESTful APIs, microservices, and event‑driven systems (Kafka). Hands‑on with Hexagonal Architecture, DDD, SOLID, and Clean Code practices. Familiarity with AWS services (EC2, S3, CloudFront, Lambda). Quality & Security Mindset Strong understanding of web security best practices (authentication, authorization, data encryption). Experience with quality and security tooling (JWT, OAuth, SonarQube, Kiuwan). Startup & Collaboration Highly proactive—more than just executing specs, you’ll propose improvements, optimize performance, and drive scalability. Excellent communicator and team player, comfortable working in a lean, agile environment. Results‑oriented, self‑managed, and adaptable to shifting priorities. Passion & Fit A genuine love for coding and continuous learning. Comfort in a fast‑paced, high‑traction startup culture. A mindset of ownership—you take pride in delivering rock‑solid, user‑focused products. Benefits Be part of a rapidly growing, internationally expanding startup. Have an ambitious professional development plan to help you reach your full potential. Enjoy an unbeatable team culture—ask anyone on our team Take advantage of our hybrid full‑flex methodology: a mix of remote and in‑office work, with our office located in the heart of Valencia, CORE building (Plaza Legión Española). Perks include wellness programmes, gym access, English classes, medical insurance, and more. At the office Organic fruit Free caffeine and theine Recruitment process Round 1, Cultural Fit: Kick things off with an informal chat with our People & Culture team. Don’t worry—we just want to get to know you better, learn about your goals, hobbies, and more Round 2, Case Study & Technical Skills with Product: Join two members of our Product team for a deep dive into a case study. This is your chance to showcase your client management skills and demonstrate how you approach problem‑solving. Round 3, Meet the Team: Have a conversation with additional team members to further explore your skillset and ensure there's a great cultural fit. This is also your chance to ask questions and see how we collaborate. Final check, CEO Chat: Meet Héctor, our CEO He’s excited to connect with you, talk about Shakers’ future, and discuss your vision and expectations. About Shakers We imagine, design, and create the next‑generation way of working. Our vision is to be the leading community and platform in the world that helps companies work with freelance teams through our technology. We are a 90‑person, fast‑growing startup based in Madrid. It’s the place for you if you’re looking for a high‑performance, very dynamic & technological environment surrounded by ambitious people At Shakers, we are obsessed with our values. Half of our bonuses are performance‑based, and the other half come from embodying what it means to be a true Shaker Seniority level Mid‑Senior level Employment type Full‑time Job function Engineering and Information Technology Industries Software Development #J-18808-Ljbffr