Remote Staff Backend Engineer — AI Platform & Systems

fledge; Barcelona; A distancia; EUR 90.000 - 150.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Remote policies

Relocation support

Visa sponsorship

Descripción de la vacante

Fledge is seeking a Staff Backend Engineer to join an elite AI platform team. You will serve as the technical architect, focusing on Python/Django backend development and scalable AI-native architectures to orchestrate autonomous recruitment workflows.

You will collaborate with AI researchers, design robust systems for low latency, and mentor peers while delivering full-stack features. The role offers top-tier compensation, equity, remote-friendly policies, relocation and visa sponsorship.

Formación

• Expert-level proficiency in Python with extensive experience in Django, Django Channels, FastAPI, ASGI, and async programming.
• Strong system design skills and ability to articulate technical trade-offs.
• Proven skills in building scalable backend systems handling 100+ concurrent AI workflows with low latency.
• Deep knowledge of LLMs, including prompt engineering, chaining, caching, fine-tuning, and usage of open-source (Llama, Mistral) or closed-source models (OpenAI, Anthropic).
• Experience with retrieval-augmented generation (RAG), vector databases, and semantic search implementations.
• Familiarity with AI agentic frameworks, multi-agent orchestration, planning, and reasoning systems.
• Hands-on experience integrating speech-to-text, text-to-speech, telephony (Twilio, IVR), and voice activity detection into production systems.
• Proficiency with AI-assisted development tools and ability to deliver full-stack features (backend + frontend) efficiently.
• Good frontend skills with JavaScript/TypeScript and React (AI-assisted vibe coding).
• Understanding of asynchronous message queues (Celery, RabbitMQ/Redis) and data storage technologies (PostgreSQL, Redis).
• English and Spanish fluency

Responsabilidades

• Lead the development of full-stack solutions, from designing intuitive user interfaces to crafting robust backend systems.
• Collaborate with cross-functional teams, including AI researchers and data scientists, to seamlessly integrate AI models into user-centric applications.
• Architect scalable, maintainable systems that support the company’s rapid growth and mission to make a meaningful environmental impact.
• Drive innovation by exploring and implementing modern frameworks, APIs, and cloud solutions.
• Mentor and support junior developers, fostering an environment of collaboration and technical excellence.
• Automate and optimize systems to deliver faster, more efficient solutions to both users and internal teams.

Conocimientos

Python

Django

Async programming

System design

LLMs

RAG

PostgreSQL

Redis

Frontend basics

Celery

CI/CD

Docker

AWS

Educación

Bachelor’s degree in Computer Science

Herramientas

Docker

Kubernetes

PostgreSQL

Redis

Terraform

Descripción del empleo

Fledge is seeking a Staff Backend Engineer to join an elite AI platform team. You will serve as the technical architect, focusing on Python/Django backend development and scalable AI-native architectures to orchestrate autonomous recruitment workflows.

You will collaborate with AI researchers, design robust systems for low latency, and mentor peers while delivering full-stack features. The role offers top-tier compensation, equity, remote-friendly policies, relocation and visa sponsorship.