M

Messa

AI-powered evaluation layer for hiring

Senior Full Stack Engineer

Full-TimeUpdated on 10/15/2026
No salary listed
Senior
Remote in Argentina
Remote
Software EngineeringFull-Stack Engineering

About the job

Requirements
  • Expert-level proficiency in React and modern TypeScript.
  • Basic backend experience, including comfort designing application programming interfaces and working with server-side systems.
  • Experience working with artificial intelligence and large language model tools in a workflow and integrating artificial intelligence capabilities into product features.
  • Ability to build polished and intuitive user interfaces with a strong user interface and user experience sensibility.
  • Ability to produce high-quality code with minimal review overhead.
  • Ability to work comfortably with ambiguity and move quickly in an early-stage environment.
  • A product mindset that considers users, not just assigned work.
Responsibilities
  • Build and own end-to-end product features across the full stack.
  • Design and implement clean, high-performance user interfaces.
  • Develop and maintain robust application programming interfaces and backend services.
  • Integrate artificial intelligence agents and large language model-powered workflows into the product.
  • Participate in code reviews and help maintain a high quality bar across the codebase.
  • Bring product ideas, question assumptions, and help shape what the team ships.
Desired Qualifications
  • Experience building software-as-a-service products from early stages.
  • Python coding skills.
  • Experience building browser extensions.
  • Experience with desktop application development, such as Electron or Qt.
  • Familiarity with Amazon Web Services or another major cloud platform.
  • Experience using Docker across development and production.
  • Experience with artificial intelligence agent orchestration or agentic workflows.

About the company

Messa provides an AI-powered evaluation layer that plugs into a company’s hiring workflow to help teams make clearer, more consistent decisions. It generates AI-based candidate shortlists, customized interview guides, and evidence-based scorecards, with an on-interview Sidekick that guides interviewers in real time. The system learns from each interview to progressively refine evaluation criteria, while final hiring decisions stay with the client. Its goal is to move organizations away from guesswork toward a structured, fact-based hiring process that yields more reliable outcomes.

Company Size

N/A

Company Stage

N/A

Total Funding

N/A

Headquarters

San Francisco, California

Founded

2025

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Simplify's Take

What believers are saying

  • Messa's April 2026 product refresh showed active shipping across shortlist scoring and interview assistance.
  • The site logged 280 evaluated candidates on April 24, 2026, proving real usage.
  • Messa was still hiring in July 2026, including engineering and product roles from its Ashby board.

What critics are saying

  • Messa stayed unfunded through early 2026, limiting runway against better-capitalized HR software.
  • GTM Lead posting on May 21, 2026 says Messa is still building its first playbook.
  • AI recruiting features from Greenhouse, Ashby, and Google threaten Messa's differentiation by 2027.

What makes Messa unique

  • Diego Meller launched Messa in October 2025 around evidence-based, human-decided hiring.
  • Messa integrates with Greenhouse, Ashby, BambooHR, and Lever without migration friction.
  • Sidekick and pre-filled scorecards embed structured interviewing directly inside live conversations.

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Benefits

Remote Work Options

Company Equity

Hybrid Work Options

Health Insurance

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