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About the Role

As a Full-Stack Engineer at Superhuman, you will play a critical role in building core parts of the Superhuman product offering, infrastructure, and features to help 40 million users write more clearly and effectively every day. You'll work at the frontier of agentic software — owning real production systems where non-determinism, evals, and developer trust are first-class concerns.

Responsibilities

• Start building and pushing code in your first week and ship impactful features in your first few months.
• Design and ship agentic features in internal development tools.
• Build evaluation frameworks for non-deterministic agent behavior.
• Own end-to-end systems: prompt design, tool integration (MCP / function calling), orchestration, observability, cost.
• Move fast in a space where best practices are being invented monthly; bring rigor without slowing down.
• Partner with eng leadership across SH to measure and improve developer throughput.
• Contribute to an engineering culture that prioritizes impact above all else.
• Evaluate the systems and technology currently in place, and propose systems and architecture that can scale for the future.
• Have the opportunity to mentor new hires.

Requirements

• Brings at least three years of experience in Full-Stack development.
• Displays excellent software engineering fundamentals, including knowledge of algorithms and data structures.
• Cares about the internal user experience and strives to prioritize impact over everything.
• Has experience building, deploying, and debugging production systems at scale.
• Demonstrates perseverance when faced with tough technical issues.
• Hands-on experience building with LLM APIs (Anthropic / OpenAI / equivalent), including tool use, structured outputs, and multi-turn agent loops.
• Strong intuition for developer experience — opinions on what makes a tool feel good to engineers.
• Comfort with non-determinism: thinks in distributions and evals, not pass/fail tests.
• Has a demonstrated ability to work independently with minimal guidance, proactively manages tasks and priorities across multiple projects, analyzes and executes work efficiently, collaborates effectively with cross-functional teams, and thrives in fast-paced, results-driven environments.

Location

• Berlin

Work Type

• Hybrid

Experience Level

• 3+ years of experience in Full-Stack development

Benefits

• Professional growth opportunities including training, coaching, and regular feedback.
• Highly collaborative culture supported by values.
• Employee resource groups.
• Celebration programs.
• Competitive pay.
• Life care (including mental health care and risk benefits).
• Ample and defined time off.
• Support to set up a home office.
• Wellness and pet care stipends.
• Learning and development opportunities.
• Comprehensive relocation support including visa assistance, destination services, and a relocation bonus.

About the Company

• Superhuman is an AI productivity platform on a mission to unlock the superhuman potential in everyone.
• The Superhuman suite of apps and agents brings AI wherever people work, integrating with over 1 million applications and websites.
• The company’s products include Grammarly’s writing assistance, Coda’s collaborative workspaces, Mail’s inbox management, and Go, the proactive AI assistant that understands context and delivers help automatically.
• Founded in 2009, Superhuman empowers over 40 million people, 50,000 organizations, and 3,000 educational institutions worldwide to eliminate busywork and focus on what matters.

Equal Opportunity

• Superhuman is an equal-opportunity company.
• We do not discriminate on the basis of race or ethnic origin, religion or belief, gender, disability, sexual identity, or age.