Senior Software Engineer (Full-Stack) (m/f/d)

Overview

Senior Software Engineer (Full-Stack) at a stealth-mode AI startup. You will have high ownership to solve complex technical problems, shape scalable systems, and influence product and technical direction.

Role focuses on building reliable backend services, optimizing databases, and shaping architectural decisions. If you thrive in a fast-paced environment, enjoy collaborating with senior engineers, and take pride in writing clean, maintainable code, we’d love to meet you.

Responsibilities

• Build & Scale Backends: Design, develop, and maintain backend services and APIs using Node.js, TypeScript, and PostgreSQL.
• Model & Optimize Databases: Create efficient schemas to support current needs while planning for future scale.
• Shape Architecture: Collaborate with other senior engineers and the CTO to refine system design and ensure smooth integration between backend, frontend, and infrastructure.
• Validate Infrastructure: Partner with our DevOps team to review and validate AWS configurations, deployments, and security practices.
• Enhance CI/CD: Ensure robust, automated pipelines for reliable deployments and rapid iteration.
• Maintain Quality: Write clean, testable, and scalable code and participate in code reviews to uphold engineering best practices.
• Mentor & Share Knowledge: Support junior engineers through guidance, debugging help, and sharing best practices.
• Leverage AI Thoughtfully : Use AI tools strategically to enhance productivity and code quality, with a clear understanding of when and how to apply them effectively—we don’t "vibe code," we use AI to make our work better.

What Success Looks Like

• High-quality, performant backend code shipped consistently with significant ownership of features and technical decisions.
• Reliable integrations across backend, frontend, and infrastructure.
• Valuable contributions to architecture and database design discussions.
• CI/CD pipelines running smoothly with minimal downtime.
• Positive peer feedback on collaboration and technical leadership.
• Thoughtful application of AI tools that demonstrably improves development velocity and code quality.

Requirements

• Must-Haves
• Strong skills in Node.js, TypeScript, and PostgreSQL.
• Experience building and maintaining REST APIs or microservices.
• Familiarity with AWS services (EC2, RDS, S3, IAM, etc.).
• Solid understanding of CI/CD workflows and Git-based development.
• Strong problem-solving and debugging skills.
• Ability to thrive in a fast-paced, collaborative startup environment with high autonomy.
• AI-first mindset: Comfortable using AI tools strategically while maintaining strong engineering fundamentals.

• Nice-to-Haves
• Experience with NestJS or similar backend frameworks.
• Exposure to frontend frameworks like Angular.
• Knowledge of Docker, Kubernetes, or infrastructure-as-code (Terraform, CloudFormation).
• Performance tuning and security optimization experience. Previous experience in AI/ML startups or working with AI-powered products.

Tools & Technologies

• Core Stack: Node.js, TypeScript, PostgreSQL
• Infrastructure: AWS, Docker, GitHub Actions (or similar CI/CD)
• Version Control: Git
• Frontend (optional): Angular

Benefits

• High Ownership & Impact: Make meaningful technical decisions and see your code power critical features from day one.
• Stealth-Mode Innovation: Help build something groundbreaking in the AI space with the freedom to shape both product and architecture.
• Cutting-Edge Stack: Modern tools, AI-first culture, and continuous learning opportunities.
• Collaborative Environment: Work directly with other senior engineers, the CTO, and cross-functional teams who love solving complex problems together.
• Strategic AI Integration: Be part of a team that uses AI thoughtfully to enhance engineering productivity, not as a replacement for solid engineering practices.

Ready to Shape the Future of AI? Join us in building a product—and a codebase—that can scale to the next level. You’ll have the ownership, autonomy, and technical challenges that make this role truly rewarding. Apply now and help us build something extraordinary.

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