Senior Full Stack Engineer (AI-Native Platform)

Surein

Berlin permanent

Posted: December 10, 2025

Required Skills

Job Description

Your mission:
Full Stack Feature Ownership

• Build end-to-end features across React (frontend) and Node.js / TypeScript (backend)

• Translate complex technical workflows into clean, intuitive UIs

• Collaborate closely with backend, AI engineering, product, and design

• Implement robust API integrations, state management, and data flows

Frontend Engineering

• Develop reusable components, layouts, and UI patterns

• Optimize for performance, clarity, and usability

• Maintain design consistency and elevate product polish

Backend Engineering

• Implement and maintain backend routes, business logic, and services

• Work with PostgreSQL for data modeling and queries

• Contribute to distributed system patterns, event-driven flows, and reliability

AI-Enabled Product Work

• Integrate frontend experiences with AI-derived outputs (structured data, workflows, insights)

• Collaborate with AI engineers to ensure clarity and usability of model outputs

Engineering Best Practices

• Write high-quality, maintainable code

• Contribute to code reviews, technical discussions, and architectural decisions

• Support performance, observability, and CI/CD improvements

Your profile:
Technical Skills

• Expert-level TypeScript

• Strong proficiency with React (hooks, component design, state management)

• Backend experience using Node.js + TypeScript

• Solid understanding of databases (PostgreSQL)

• Experience integrating APIs and working with data-heavy UIs

• Familiarity with AWS, DevOps basics, and performance optimization

• Interest or experience with AI-enabled products (LLMs, embeddings, model outputs)

Mindset & Culture Fit

• Bias for action - ships iteratively and improves continuously

• Builder mentality - enjoys solving open-ended problems

• Low ego - collaborative and pragmatic

• Strong communicator - can explain trade-offs clearly

• Ownership mindset - takes responsibility from spec → implementation → polish → release

Why SureIn?:
SureIn is building an AI-native operating system that transforms unstructured communication and data into structured, automated workflows. We are Sequoia Arc alumni, backed by top-tier investors, and now expanding our engineering team to deliver high-quality, user-facing features on top of a fast-evolving backend and AI stack.

We are hiring a Senior Full Stack Engineer who can work across backend services and frontend interfaces to deliver end-to-end features with strong ownership. This is a hands-on IC role with significant influence on architecture, UI/UX patterns, and overall product quality.

The ideal candidate is strong in Node.js, TypeScript, React, understands modern system design, and enjoys turning complex backend capabilities (including AI outputs) into simple, intuitive user experiences.

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