Staff Backend Engineer, Context Management

Wand AI; Spain; On-site; EUR 90,000 - 140,000; Full time

Job summary

Wand AI in Spain seeks a hands-on Staff Engineer to own the context management layer powering its AI agents. You will ensure access, retrieval, and reasoning over information from diverse enterprise sources in a fast-paced startup.

You will work with Python, Golang, Elasticsearch, MongoDB, PostgreSQL, Redis, and cloud platforms to build scalable search, data pipelines, and end-to-end data integration for enterprise SaaS, contributing to production-grade AI capabilities.

Qualifications

• Degree in Computer Science, Engineering, or a related field (required).
• 10+ years of engineering experience in high-paced settings.
• Proficiency in Python or Golang; willingness to adopt new languages as stack evolves.
• Experience with enterprise SaaS integrations or search technologies (Elasticsearch or vector databases).
• Proficiency with at least one cloud platform (GCP/AWS/Azure).
• Self-sufficiency across the stack and Docker/Kubernetes experience.
• Production experience with data pipelines, ETL/ELT workflows, and LLM APIs.

Responsibilities

• Design and build scalable search and retrieval systems using lexical and semantic methods.
• Develop and maintain connectors to enterprise data sources and APIs.
• Build data pipelines to ingest, transform, and index customer data for AI agents.
• Pull and process analytics data from customer data warehouses (Snowflake, BigQuery, Databricks).
• Own projects end-to-end from architecture through deployment and maintenance.
• Collaborate with product and AI teams to improve agent performance via retrieval quality.
• Optimize pipelines for latency, relevance, and cost at scale.
• Uphold a culture of high efficiency, creativity, and quality.

Skills

Python

Golang

Cloud platforms

Elasticsearch

Data pipelines

Kubernetes

Docker

ETL/ELT

LLM APIs

Education

Degree in Computer Science/Engineering

Tools

Elasticsearch

Snowflake

BigQuery

Databricks

PostgreSQL

Redis

RabbitMQ

Kafka

Job description

Build the Future Workforce

Wand turns AI into labor. It enables humans and AI agents to operate together as a unified, hybrid workforce, with comprehensive management and oversight. And it’s already operating at scale inside some of the world’s largest organizations.

Build the Future Workforce

Wand turns AI into labor. It enables humans and AI agents to operate together as a unified, hybrid workforce, with comprehensive management and oversight. And it’s already operating at scale inside some of the world’s largest organizations.

Wand built the world’s first Agentic Labor Infrastructure enabling governments and global enterprises to create, manage, and scale digital workforces.

Our mission is to integrate agent ecosystems into the core of work and business, unlocking a generational leap in the global economy. We’re building the infrastructure that lets humans and AI agents operate together safely, transparently, and at scale.

Join Wand in leading the Agentic Shift

Wand is building a high-performing global team who take full ownership of what they build. We lead by example, move fast, make data-aware decisions, and continuously push for more- always with a focus on delivering real value to customers.

You would be joining a world-class team that combines deep research expertise and real-world product execution, with experience spanning Deepmind, Google, Amazon, Miro, Elise AI, IBM and Accern.

Position Summary:

This role is ideal for a hands-on Staff Engineer with 10+ years of experience building information retrieval and data integration systems, especially in a high-paced startup environment. You will own the design, development, and maintenance of the context management layer that powers our AI agents. You will ensure they can access, retrieve, and reason over the right information from diverse enterprise sources.

Our tech stack includes:

• Backend: Python, FastAPI, BlackSheep, Temporal
• Data & Search: Elasticsearch, MongoDB, PostgreSQL, Redis, ClickHouse, Snowflake
• AI/ML: OpenAI, LangChain, LangGraph, LiteLLM, Docling
• Messaging: RabbitMQ, Kafka
• Cloud & Infra: Azure, Docker, Kubernetes

Responsibilities:

• Design and build scalable search and retrieval systems combining lexical and semantic approaches.
• Develop and maintain connectors to enterprise data sources (SaaS platforms, data warehouses, document stores, APIs).
• Build data pipelines that ingest, transform, and index customer data for use by AI agents.
• Pull and process analytics data from customers' warehouses (Snowflake, BigQuery, Databricks, etc.).
• Own projects end-to-end: from architecture and technical design through implementation, deployment, and ongoing maintenance.
• Collaborate with product and AI teams to translate retrieval quality into measurable agent performance improvements.
• Optimize retrieval pipelines for latency, relevance, and cost efficiency at scale.
• Uphold a culture of high efficiency, creativity, and quality.

Key Qualifications:

• Degree in Computer Science, Engineering, or a related field.
• 10+ years of engineering experience
• Strong proficiency in Python or Golang; willingness to work in additional languages as the stack evolves.
• Background in building enterprise SaaS integrations or source connectors at scale, or hands-on experience with search technologies (Elasticsearch, vector databases such as Pinecone, Weaviate, Qdrant, or similar).
• Proficiency in at least one cloud environment (GCP, AWS, Azure).
• Proven track record in a high-paced startup environment.
• Self-sufficiency across the stack, comfortable operating without dedicated DevOps support.
• Experience with containerized environments (Docker, Kubernetes).

Preferred Experience:

• Solid understanding of embeddings, semantic search, and retrieval-augmented generation (RAG) patterns.
• Experience building and maintaining data pipelines and ETL/ELT workflows.
• Familiarity with at least one major data warehouse platform (Snowflake, BigQuery, Databricks, Redshift).
• Experience working with LLM APIs and agent frameworks in production.
• Experience with chunking strategies, re-ranking models, and hybrid retrieval approaches.
• Experience on search, information retrieval, or data engineering.
• Familiarity with data governance, access control, and multi-tenant data architectures.
• Contributions to open-source search or retrieval projects.
• Experience with production systems serving enterprise customers.

Personal Characteristics:

• Strong individual contributor comfortable owning major projects with minimal oversight.
• Thinks architecturally: balances long-term design quality with startup speed.
• Excellent communication and interpersonal skills.
• Continuous drive for improvement and innovation.