Data Engineer (AWS Glue + Elasticsearch)

Barcelona, Spain

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Remote | Full-time | SaaS | Data Engineering

OnHires is partnering with Instantly.ai, a high-growth AI-driven sales outreach and lead intelligence platform used by over 35,000 B2B companies worldwide. We are looking for a Data Engineer to take ownership of SuperSearch — the backend infrastructure powering B2B lead discovery and enrichment.

About the Role

As a Data Engineer, you’ll lead the development and maintenance of large-scale data pipelines and infrastructure that drives our core lead intelligence platform. This role blends classic data engineering with semantic search and LLM-powered enhancements — in a fast-paced, high-impact startup environment.

Key Responsibilities

  • Build and maintain data processing pipelines using AWS Glue (PySpark) and S3

  • Work with large-scale datasets in Elasticsearch and MongoDB

  • Create robust workflows for data transformation, cleaning, and normalization

  • Optimize and tune our search infrastructure, including query design and semantic enhancements (LLMs, DeepL, embeddings)

  • Collaborate closely with product and engineering teams to deliver scalable solutions

Must-Have Skills

  • Proven experience with AWS Glue, PySpark, and S3

  • Deep understanding of Elasticsearch (queries, aggregations, performance optimization)

  • Strong Python skills (esp. with PySpark and Pandas)

  • Experience with data quality, schema evolution, and operational monitoring

  • Familiarity with LLMs, embeddings, or semantic search techniques is a strong plus

  • Bonus: Experience with Node.js or general JavaScript backend development

Why Instantly.ai?

  • Join a product-led, profitable SaaS startup on its way to unicorn status

  • Work directly on a critical product area with full ownership and autonomy

  • Fast-moving environment with minimal red tape and maximum impact

  • Collaborate with high-caliber engineers, data scientists, and product minds

Company Perks

  • Opportunity to work with a rapidly growing SaaS company in a dynamic industry

  • Chance to work with a talented and passionate team of professionals

  • Competitive salary and benefits package

  • Clear path for career growth and advancement

  • Casual, remote-friendly, and collaborative work culture

  • Opportunity to make a meaningful impact on the future of our platform

If you’re excited about owning critical data infrastructure in a high-growth SaaS environment - we’d love to hear from you. Apply today, and we’ll get in touch shortly.


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* Salary range is an estimate based on our AI, ML, Data Science Salary Index 💰

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Category: Engineering Jobs

Tags: AWS AWS Glue Data pipelines Data quality Elasticsearch Engineering JavaScript LLMs MongoDB Node.js Pandas Pipelines PySpark Python

Perks/benefits: Career development Competitive pay Startup environment

Region: Europe
Country: Spain

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