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Tezos is the product of many organizations and individuals across the globe working together on an open-source project.

Senior Software Engineer, Full-Stack and AI Systems

Madfish

Madfish

Software Engineering, Data Science
Remote
Posted on Nov 19, 2025

Role Overview

We are seeking a Senior Software Engineer to architect and scale our platform-level agentic AI systems. This role combines full-stack engineering excellence with deep expertise in LLM-powered experiences. You’ll design, implement, and optimize core components across frontend, backend, and model integrations, while driving engineering direction in close collaboration with our co-founders. Your work will directly shape the reliability, speed, and cohesion of company’s multi-agent ecosystem.

Key Responsibilities

  • Architect and implement cross-agent systems that power core platform experiences.
  • Build and scale full-stack product components using TypeScript/React and Python services.
  • Integrate LLMs into production workflows with strong contracts, observability, and test coverage.
  • Develop shared UI components and typed SDKs to unify cross-agent experiences.
  • Lead engineering direction, collaborating with founders and cross-functional stakeholders.

Requirements

  • Senior-level full-stack experience in React, TypeScript, and Python.
  • Proven ability to design, ship, and scale LLM-powered applications.
  • Expertise in API design, streaming, and CI/CD pipelines.
  • Strong cloud infrastructure background (AWS, GCP, or Azure).
  • Track record of building reliable systems with measurable performance and error budgets.

Nice-to-Have

  • Experience with WebRTC or audio-aware UI design.
  • Hands-on work with agentic AI frameworks.
  • History of creating design tokens, SDKs, or cross-agent platforms.

First-Month Focus

  • Audit current cross-agent flows for UI/UX cohesion.
  • Implement shared components and typed contracts for reliability.
  • Establish instrumentation for frontend performance and model round-trip tracing.

Success OKRs (90 Days)

  • Deliver end-to-end tested, production-grade agentic workflows with <5% error rates.
  • Launch cross-agent design system and SDK used by at least 2 internal teams.
  • Establish weekly “deploy and measure” cadence with performance metrics and error budgets.

Culture Fit

  • Persistent, driven problem solver
  • Willing to push back on leadership to defend quality/timelines
  • Thrives in high-ambiguity, fast-paced startup environments

About Us

👏 Team from OpenAI, DeepMind, NASA, GoogleX, Tesla, and 2 physicians: 6 exits, 2 IPOs.

🔥 Our model outperforms Claude, Gemini, and GPT-4.5 on clinical benchmarks.

📈 400+ healthcare orgs signed in 16 months.

⚡️ $25M raised from YC, Amity Ventures, Sequoia scouts, and more.

🌎 $1T+ market opportunity. We’re going after all of it.

Why Join Us?
🔥 Shape the Future of Healthcare: Build category-defining partnerships that enable doctors to focus on saving lives.
📈 Early-Stage Impact: Join early and play a critical role in shaping our partnership roadmap and overall company growth.
🌎 Remote-First Culture: Work with a talented, mission-driven team in a flexible, remote environment.
💰 Competitive Compensation: Enjoy a competitive salary, equity, and the opportunity to make a real difference.
🏆 Solve Scalability Challenges: Tackle complex challenges in a rapidly growing company, driving impactful change in healthcare.