Senior/Principal Fullstack Developer

Join a diverse team of approx. 2000 professionals across four continents, driving innovation and growth within intive’s technology hubs. Work alongside industry experts trusted by leading brands like Audi, BMW, Deichmann, Meta, NewsCorp, Tandem, Paramount, Vorwerk, and Warner Bros. Discovery to create pioneering, sustainable digital experiences.

At intive, agile thinking and deep industry expertise come together across Automotive & Mobility, Commerce, Financial Services, Healthcare & Life Sciences, and Technology, Media & Communication. Be part of a team that’s shaping the future of digital innovation.

We are seeking an expert Fullstack Developer with deep expertise in modern web technologies to join our delivery team. You will be a technical leader who bridges the gap between client expectations and development excellence, taking an active role in presales activities, solution architecture, and project delivery. This is a role for someone who is not just a skilled developer, but also a business-minded consultant who can communicate complex technical concepts to clients, estimate projects accurately, and drive innovation through cutting-edge technology.

As a senior technical contributor, you will be responsible for leading presales activities, designing scalable solutions, architecting new projects, and delivering high-quality software products. You will work directly with clients to understand their business needs, propose technical solutions, and then lead development teams in bringing those solutions to life. Your deep technical expertise combined with excellent communication skills will be critical to success.

What you will be doing:

- Solution Architecture: Design scalable, maintainable architectures for new projects using modern fullstack technologies. Consider performance, security, scalability, and business requirements.

- Project Estimation: Provide accurate technical estimates, identify risks, and create realistic project plans based on business realities .

- Fullstack Development: Develop robust, production-ready applications using Next.js, React, and complementary backend technologies (Node.js, TypeScript, etc.).

- Technical Leadership: Lead development teams, conduct code reviews, establish best practices, and mentor junior developers. Set the technical direction and quality standards.

- AI-Assisted Development: Champion the adoption of AI-powered development tools (GitHub Copilot, Claude, etc.) to enhance productivity and code quality while maintaining best practices.

- DevOps & Infrastructure: Work with containerized environments (Docker, Kubernetes), cloud platforms (AWS, GCP, Azure), and implement CI/CD pipelines for seamless deployment.

- Quality Assurance: Establish and maintain quality standards including unit testing, integration testing, code coverage, and security best practices. Implement monitoring and observability solutions.

- Presales & Client Engagement: Participate in client meetings, technical discussions, and RFP responses. Understand client requirements, propose solutions, and establish credibility as a technical expert.

You are a good match if you have:

- 8+ years of professional software development experience with at least 3+ years in fullstack development.

- Expert-level proficiency in React and Next.js, with a deep understanding of modern JavaScript/TypeScript ecosystems.

- Prior experience as a technical lead or architect in client-facing roles.

- Hands-on experience with backend technologies (Node.js, Express, or equivalent), databases (SQL & NoSQL), and REST/GraphQL APIs.

- Strong understanding of containerization (Docker) and experience with cloud platforms (AWS, GCP, or Azure).

- Proven experience in presales activities: presenting solutions to clients, writing technical proposals, and translating business requirements into technical specifications.

- Excellent written and verbal communication skills in English; ability to explain complex technical concepts to non-technical stakeholders.

- Proven track record of estimating projects accurately and delivering on time.

- Strong understanding of software quality practices: unit testing, integration testing, code review processes, and continuous integration/deployment.

- Experience with version control (Git) and modern development workflows (Agile/Scrum).

Nice to have:

- German language proficiency (a significant plus for client-facing roles in EMEA region).

- Kubernetes and orchestration experience beyond basic Docker usage.

- Experience with headless CMS systems, API-first architecture, and microservices design patterns.

- Proficiency in Infrastructure as Code (Terraform, CloudFormation, or equivalent).

- Experience with AI-assisted development tools and understanding of their best practices and limitations.

- Knowledge of serverless architectures (AWS Lambda, Vercel Functions, etc.).

- Frontend optimization expertise: web performance, SEO, Core Web Vitals, and accessibility (a11y, WCAG).

- DevOps mindset with experience in monitoring, logging, and observability tools (ELK stack, Prometheus, Grafana, etc.).

- Understanding of security best practices: OWASP top 10, authentication/authorization patterns (OAuth2, JWT), and secure coding principles.

- Red Hat / Linux administration basics and knowledge of container registries and package management.

- AWS Solutions Architect Associate certification or equivalent cloud certifications.