We're expanding the Backend Lead behind an AI-powered product built on modern LLM technologies. You will own the platform services domain, partnering closely with product and engineering to turn ambitious ideas into scalable, production-ready systems.

Requirements

- 6+ years of experience building and shipping production software.

- 3+ years of hands-on experience with asynchronous Python in production environments.

- 2+ years of engineering leadership experience, leading teams through execution while remaining deeply technical.

- Strong background designing and evolving complex distributed systems, platform-level infrastructure, or other high-scale backend architectures.

- Thrive in high-autonomy environments: able to define technical direction, break down ambiguous problems, prioritize work, and deliver results without detailed specifications or constant guidance.

- Product-minded engineering approach: take end-to-end ownership of features - from shaping technical solutions and planning execution to identifying risks early, coordinating with cross-functional teams, and driving successful delivery.

- Strong technical leadership skills: able to provide thoughtful feedback, setting a high technical bar, while making decisions that maximize team effectiveness.

- Practical experience building with LLMs and agentic AI frameworks (e.g. LangGraph or similar), combined with an up-to-date understanding of the rapidly evolving AI ecosystem and engineering best practices.

- Comfortable operating in fast-moving, high-ambiguity environments, where requirements evolve, priorities shift, and engineers are expected to shape solutions rather than simply implement predefined tasks.

Responsibilities

- Lead a small backend team, owning execution - decomposition, estimation and prioritization.





- Continuously assess team performance and growth and adjust team composition when needed - all without disrupting delivery.

- Build and maintain integrations with third-party services.

- Develop our internal LLM agent framework, with a focus on scalability, throughput, and parallel processing.

- Extend and refine platform architecture to meet the project's evolving needs.

- Technically lead the backend/platform track: break down complex work into clear tasks and build processes around product goals.

- Adapt quickly as priorities shift - work in short feedback loops, keep the team aligned, and drive work through to completion.

- Work closely with other teams: align on architecture and integrations, understand ownership boundaries, and decide what your team owns versus what can be handed off.

- Ensure system observability and reliability through metrics, tracing, and monitoring.

Tech stack: Python 3.13, asyncio, Kubernetes, Kafka, PostgreSQL, HTTP/gRPC, ELK, Grafana.

What We Offer

- The team has built award-winning AI products for tech corporations: devices, voice assistants, products that are actually in the world

- Cutting-edge tech stack: Speech Technologies, NLP, Generative AI (LLMs, diffusion models), voice-first agentic architecture with privacy-first and on-premises deployment

- High engineering bar and real ownership: the team cares about what actually works in production, not what looks good in a demo, and you'll see the impact of your work directly

- Fast career progression: a senior-heavy team and a high volume of real problems means you grow faster than you would anywhere else

- Startup pace with enterprise stability: real clients, real revenue, no bureaucracy

- Fully remote across Europe

- 21 vacation days + public holidays + 5 sick days

- Private English lessons via Preply

- Company-paid subscriptions to top AI tools (ChatGPT, Claude, Cursor, and others)

📌 Backend Team Lead (Barcelona)
🏢 Acclaim AI
📍 Barcelona