Software Engineer

Supersonik

Barcelona💼 Full-time🗓 2026-09-18 → 2026-09-23

Core

Build AI-powered product demos for B2B SaaS companies using real-time video calls and LLMs.

Role type

Senior Software Engineer (Backend/Full Stack)

Builds

Real-time, event-driven backend systems and AI-driven demo features for SaaS sales teams.

Domain

B2B SaaS, AI/LLM, Real-time Systems

Deliverable

production ML models

Required skills

Python, Asyncio, FastAPI, Redis, PostgreSQL, AWS, Terraform, React, LLM integration

Preferred skills

LLM fine-tuning, TTS/STT, browser automation, distributed systems, 0→1 product development

Responsibilities

Scale real-time event-driven backend architecture, design low-latency APIs, optimize performance and observability, contribute frontend to infrastructure, collaborate on prompt engineering and LLM behaviors, build infrastructure-as-code.

Seniority

Senior, hands-on IC

Sourced via adzuna · Listed on CareerPlan, which tracks 855,000+ jobs from 20+ sources.