---
title: 'Software Engineer at Supersonik'
canonical: 'https://feeny.ai/job/software-engineer-supersonik-barcelona-gs6hy8hmcyyc'
type: 'job'
last_seen: '2026-09-05'
---

# Software Engineer at Supersonik

- **Company:** Supersonik
- **Location:** Barcelona, Spain
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2025-08-18
- **Last confirmed live:** 2026-09-05
- **Apply:** https://jobs.gem.com/supersonik-ai/am9icG9zdDrN3IlDTV4S3CP-RqFG7w1H

## Job description

🚀 About Supersonik Supersonik helps B2B SaaS companies sell faster with AI-powered product demos. On a live video call, our AI Agent shares the screen to walk buyers through a personalized, interactive demo in any language. This lets teams skip long sales calls and focus on closing deals. We’re backed by Andreessen Horowitz (a16z) and work with leading SaaS companies worldwide.

🧩 About the Role We’re hiring Senior Engineers to join our core team in Barcelona.

You’ll be solving complex, technical problems and shaping the product and architecture from day one. You should thrive in high-growth startup environments, be fluent in modern Python and async programming and know how to build scalable, event-driven systems. You care about fast, real-time systems and enjoy working at the intersection of performance, AI and great user experience. If you love solving first-principles problems, navigating ambiguity and want to build a product people love you’ll fit right in.

## What You’ll Work On

- Scale a real-time, event-driven backend architecture where milliseconds matter
- Design and implement low-latency APIs using FastAPI and Asyncio
- Solve engineering challenges in performance optimization, observability, and resilience
- End to end contributions from frontend to infrastructure.
- Collaborate on prompt engineering, LLM behaviors, LLM fine-tuning and UX
- Build and maintain infrastructure-as-code with Terraform and AWS
- Contribute to 0→1 product development with a small, fast-moving team

## Our Stack

- Backend: Python, FastAPI, Asyncio, Redis, PostgreSQL
- Infra: AWS, Terraform, CI/CD
- Frontend: React
- Tooling: GitHub, Datadog, Linear Bonus Points
- Experience with LLMs (prompting, training, alignment)
- Experience with TTS, STT and real-time voice
- Experience with browser automations
- Deep knowledge of AWS, Terraform, and distributed systems
- Experience shipping 0→1 products in a startup

## What You’ll Get

- Significant equity in a company backed by A16z
- Full ownership, real impact, and fast learning cycles
- A tight-knit team that values clarity, speed, and smart execution

## About Supersonik

## Company Overview
- **One-liner**: Supersonik deploys AI agents that deliver instant, personalized, and interactive product demos 24/7 for B2B SaaS companies.
- **Entity Type**: Private (Seed stage – $5M seed round led by Andreessen Horowitz)
- **Headquarters**: Barcelona, Catalonia, Spain (also has a San Francisco office)
- **Founded**: 2025 (first funding round in March 2025)
- **Founders**: Dani Carmona (Co-Founder & CEO), Pol Ruiz Farre (Co-Founder & CTO), Joaquim Lecha (Co-Founder)

## Core Business
- **Primary industry**: AI-powered sales enablement / conversational AI for SaaS
- **Target customers**: B2B SaaS companies of all sizes (SMB to Enterprise) looking to accelerate sales cycles
- **Mission**: Replace outdated, manual demo processes with smart, dynamic AI-driven experiences that let prospects get a live, personalized demo instantly

## Products & Services
- **Supersonik AI Agent**: An AI that logs into a company's real product, navigates it in real time, and conducts a video-call-like demo. It captures user context, personalizes the flow, and guides prospects to a call to action (e.g., free trial, booking). Available as embedded widget on website or as a shareable link. Supports 70+ languages, runs thousands of concurrent sessions with ultra-low latency, and is SOC 2 Type II and GDPR compliant. [supersonik.ai](https://supersonik.ai/product)

## Market Standing
- **Valuation**: Not disclosed (seed round of $5M implies a post-money valuation likely under $30M, but not publicly confirmed)
- **Key Metric**: Total funding of $4.9M (Seed round $4.9M in Oct 2025, plus an earlier Pre-Seed round in Mar 2025) [linkedin.com](https://linkedin.com/company/supersonik-ai)
- **Notable Investors/Partners**: Lead investor: Andreessen Horowitz (a16z). Angel investors from Google, DeepMind, and Salesforce. Also reportedly used by 200+ Salesforce SDRs across Americas, LATAM, and EMEA. [supersonik.ai/blog/seed-round-announcement](https://supersonik.ai/blog/seed-round-announcement)
- **Growth Signals**: 25 employees with +12.5% monthly headcount growth; 5 active job postings (as of Sept 2026); quarterly job posting growth of +150%. Engaged with "thousands of businesses" per website. [linkedin.com](https://linkedin.com/company/supersonik-ai)

## Competitive Advantages
- **Real‑time product navigation**: Unlike static demo videos or chatbots, the AI actually drives the live product interface, creating a realistic, interactive experience
- **Hyper‑personalization**: Adapts the demo on the fly based on user details (name, role, context) gathered at the start of each call
- **Extreme scalability**: Can run thousands of simultaneous sessions without degradation, with industry‑lowest latency and multi‑region servers
- **Enterprise‑grade security**: SOC 2 Type II and GDPR compliant, trusted by large enterprises like Salesforce
- **Multi‑language support**: 70+ languages out of the box, removing language barriers to global sales

## Strategic Focus
- **Current priorities**: Deepening integrations with CRM and data sources (e.g., Salesforce), scaling the GTM organization (hiring Strategic Account Executives, Sales Operations Lead, Head of AI Delivery Operations), and expanding use cases beyond demos into onboarding, support, and the entire customer journey. [supersonik.ai/blog/seed-round-announcement](https://supersonik.ai/blog/seed-round-announcement)
- **Growth direction**: Becoming the "Live Product Experience Platform" that serves every stage of the customer lifecycle, not just pre-sales.

## Why Work Here
- **Culture**: Described as "fast-paced, agentic AI startup" where early‑career employees get "real ownership, steep growth." The team is distributed across 5 countries (Spain, US, UK, Ireland, Germany), with an office hub in Barcelona and a smaller presence in San Francisco. [linkedin.com](https://linkedin.com/company/supersonik-ai)
- **Remote/Hybrid**: Not explicitly stated, but the distributed workforce and two offices suggest a hybrid or remote‑friendly culture, especially for engineering and GTM roles.
- **Engineering Culture**: ~33% of staff are in technical roles (9 out of 25). The technical stack involves AI, real‑time systems, and security compliance, offering engineers exposure to cutting‑edge agentic AI.
- **Notable Perks**: Being backed by a16z provides strong runway and network. Employees get to work on a product that is already being used by a major enterprise (Salesforce). The company is still small (25 people) – offering strong ownership and impact.
- **Hiring Activity**: 5 open positions as of Sept 2026, including sales, operations, and AI delivery roles. [linkedin.com](https://linkedin.com/company/supersonik-ai)

## Sources
1. [supersonik.ai – Homepage](https://supersonik.ai/)
2. [supersonik.ai – Product Page](https://supersonik.ai/product)
3. [Blog – Seed Round Announcement](https://supersonik.ai/blog/seed-round-announcement)
4. [LinkedIn – Company Profile](https://linkedin.com/company/supersonik-ai)
5. [Built In – Company Profile](https://builtin.com/company/supersonik)

## Other roles at Supersonik

- [Enterprise Account Executive, US](https://feeny.ai/job/enterprise-account-executive-us-supersonik-new-york-x8mkctmrgser) — New York, NY
- [Strategic Account Executive, US](https://feeny.ai/job/strategic-account-executive-us-supersonik-new-york-2t4vjpp178s9) — New York, NY
- [Head of AI Delivery Operations](https://feeny.ai/job/head-of-ai-delivery-operations-supersonik-barcelona-9775bppevmjh) — Barcelona, Spain
- [Revenue Operations Lead](https://feeny.ai/job/revenue-operations-lead-supersonik-barcelona-bhq6vpwh7hb5) — Barcelona, Spain
- [Senior Account Executive](https://feeny.ai/job/senior-account-executive-supersonik-barcelona-q26t5mdvg0m1) — Barcelona, Spain
- [Deployment Strategist](https://feeny.ai/job/deployment-strategist-supersonik-barcelona-4t9wfk9rg2rf) — Barcelona, Spain
- [Software Engineer](https://feeny.ai/job/software-engineer-snowflake-warsaw-rk93stde6gfz) — Warsaw, Poland
- [Software Engineer](https://feeny.ai/job/software-engineer-mintmcp-san-francisco-gnsz7a877qxh) — San Francisco, CA
- [Software Engineer](https://feeny.ai/job/software-engineer-semperis-dallas-tk9ertgkypgk) — Dallas, TX
- [Software Engineer](https://feeny.ai/job/software-engineer-at-bay-tel-aviv-gw8683vjv7w1) — Tel Aviv, Israel