--- title: 'Senior Full Stack Engineer at Messa, Inc.' canonical: 'https://feeny.ai/job/senior-full-stack-engineer-messa-inc-argentina-hte1j57mpytm' type: 'job' last_seen: '2026-09-08' --- # Senior Full Stack Engineer at Messa, Inc. - **Company:** Messa, Inc. - **Location:** Argentina - **Employment:** full-time - **Work type:** remote - **Posted:** 2025-12-18 - **Last confirmed live:** 2026-09-08 - **Apply:** https://jobs.ashbyhq.com/messa/205b3e45-b131-4d3a-92cb-3b3dd9a559a1 ## Job description ## ROLE OVERVIEW We're looking for a Senior Full Stack Engineer to help design, build, and ship core parts of our product. You'll work across the entire stack, with a strong emphasis on crafting polished, intuitive user experiences, while also building reliable backend systems and integrating AI deeply into the product. We’re an early stage full of energy team. Everyone wears multiple hats, moves fast, and cares deeply about what we're building. We need someone with a product mindset: not just an engineer who executes specs, but someone who thinks about why we're building something and how users will experience it. ## WHAT YOU'LL DO - Build and own end-to-end product features across the full stack. - Design and implement clean, high-performance user interfaces. This is where your craft shines. - Develop and maintain robust APIs and backend services. - Integrate AI agents and LLM-powered workflows into the product. - Participate in code reviews and help maintain a high quality bar across the codebase. - Think like a product builder: bring ideas, question assumptions, and help shape what we ship. ## WHAT WE'RE LOOKING FOR Must-haves: - Expert-level proficiency in React and modern TypeScript. - Basic backend experience. You're comfortable designing APIs and working with server-side systems. - Sharp eye for UI/UX. You build interfaces that feel polished and intuitive, not just functional. - Experience working with AI/LLM tools in your workflow and integrating AI capabilities into product features. - Product mindset. You think about the user, not just the ticket. - High-quality code output with minimal review overhead. - Comfort with ambiguity and speed in an early-stage environment. Nice to have: - Experience building SaaS products from early stages. - Python coding skills. - Experience building browser extensions. - Experience with desktop app development (Electron, Qt, etc.). - Familiarity with AWS or another major cloud platform. - Experience using Docker across development and production. - Experience with AI agent orchestration or agentic workflows. ## About Messa, Inc. ## Company Overview - **One-liner**: Messa provides an AI-powered platform that helps hiring teams make clearer, more confident talent decisions by surfacing objective evidence and reducing bias in interviews. - **Entity Type**: Private (early-stage startup) - **Headquarters**: San Francisco, California, United States ([messa.ai/terms](https://messa.ai/terms)) - **Founded**: Not publicly available - **Founders**: Not publicly available ## Core Business - **Primary industry**: HR Technology / Talent Intelligence - **Target customers**: B2B – companies of all sizes looking to improve their hiring process (enterprise and SMB teams) - **Mission / purpose**: “See talent clearly. Decide with confidence.” – Messa aims to replace opaque, biased hiring with evidence-based insights. ## Products & Services - **Messa Platform**: A hiring intelligence platform that records, transcribes, and analyzes interview conversations to surface objective signals about candidates. - **Messa Sidekick**: An AI-powered assistant that helps interviewers conduct, document, and evaluate interviews in real time. - **Integrations**: Connects with applicant tracking systems (ATS), video conferencing tools, and other third-party services to embed into existing workflows ([messa.ai/terms](https://messa.ai/terms)). ## Market Standing - **Valuation / Market Cap**: Not publicly available - **Key Metric**: Not publicly available (early-stage private company) - **Notable Investors / Partners**: Not publicly available - **Growth Signals**: Actively hiring (e.g., Junior AI Software Engineer), remote-first culture, and a rapidly evolving product indicating early traction and scaling ambitions ([remotive.com](https://remotive.com/remote/jobs/ai-ml/junior-ai-software-engineer-4337967)). ## Competitive Advantages - **AI‑driven interview intelligence** that reduces common hiring biases and provides structured, evidence‑based evaluations. - **Sidekick** differentiates by embedding an AI co-pilot directly into the interview flow, capturing insights in real time. - **Focus on clarity and efficiency** – marketed as a way to avoid costly mis-hires (average cost per mis-hire/year ~$200K cited on their website) ([messa.ai](https://messa.ai)). - **IP ownership** – all software, algorithms, and branding are owned by Messa Inc., protected by intellectual property laws ([messa.ai/terms](https://messa.ai/terms)). ## Strategic Focus - **Product‑led growth** – rapidly improving the AI assistant and platform based on customer feedback. - **Scaling the team** – hiring across engineering and product to accelerate development. - **Expanding integrations** – building deep connections with ATS and video conferencing tools to reduce friction in adoption. ## Why Work Here - **Remote‑first culture** – fully remote team with a “ship fast” ethos, great for self‑starters ([messa.ai/jobs](https://messa.ai/jobs)). - **Early‑stage impact** – join as an early employee; shape product direction and engineering practices. - **Learning and mentorship** – the team emphasizes coaching and growth, especially for junior engineers; described as a “launchpad” ([remotive.com](https://remotive.com/remote/jobs/ai-ml/junior-ai-software-engineer-4337967)). - **Modern tech stack** – use of AI/LLMs, Python/TypeScript, React, FastAPI, and cloud services; exposure to cutting-edge AI workflows. - **Location flexibility** – remote-first, though some roles may have geographic restrictions (e.g., Argentina for the Junior AI Software Engineer role) ([remotive.com](https://remotive.com/remote/jobs/ai-ml/junior-ai-software-engineer-4337967)). - **Values** – clarity, bias reduction, and evidence-based decision-making are core product values reflected internally. ## Sources 1. [messa.ai](https://messa.ai) 2. [messa.ai/jobs](https://messa.ai/jobs) 3. [messa.ai/terms](https://messa.ai/terms) 4. [remotive.com – Junior AI Software Engineer job](https://remotive.com/remote/jobs/ai-ml/junior-ai-software-engineer-4337967) ## Other roles at Messa, Inc. - [Generalist Intern](https://feeny.ai/job/generalist-intern-messa-inc-americas-ctqydf9nq9ra) — Americas - [GTM Lead](https://feeny.ai/job/gtm-lead-messa-inc-americas-mhjst4f69c7f) — Americas - [Senior Full Stack Engineer](https://feeny.ai/job/senior-full-stack-engineer-teya-porto-dezkg13n226w) — Porto, Portugal - [Senior Full Stack Engineer](https://feeny.ai/job/senior-full-stack-engineer-altaml-calgary-snnt7mkc0sye) — Calgary, Canada - [Senior Full Stack Engineer](https://feeny.ai/job/senior-full-stack-engineer-strada-toronto-ftt6x15rtd99) — Toronto, Canada - [Senior Full Stack Engineer](https://feeny.ai/job/senior-full-stack-engineer-setpoint-austin-jtf0gzq87sw8) — Austin, TX - [Senior Full Stack Engineer](https://feeny.ai/job/senior-full-stack-engineer-lendable-london-javqbhs7vxm0) — London, United Kingdom - [Senior Full Stack Engineer](https://feeny.ai/job/senior-full-stack-engineer-felix-technologies-inc-buenos-aires-9yn0n8a97jes) — Buenos Aires, Argentina - [Senior Full Stack Engineer](https://feeny.ai/job/senior-full-stack-engineer-procurify-canada-19883m1z21q7) — Canada - [Senior Full Stack Engineer](https://feeny.ai/job/senior-full-stack-engineer-peek-mexico-xrx4wdmyg6d1) — Mexico