Senior Backend Engineer

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Backend Engineer in Spain.

Join a fast-growing engineering team building the backend systems behind a leading Customer Experience Intelligence platform used by global brands. In this role, you will design and scale distributed backend services and APIs that power high-impact analytics products. You will work at the intersection of backend engineering and applied AI, integrating LLMs and intelligent frameworks into production systems. The environment is highly collaborative, product-driven, and focused on solving complex data and infrastructure challenges at scale. You will take ownership of end-to-end delivery, from architecture to production operations, in a high-availability, cloud-native environment. This is a unique opportunity to shape core platform capabilities while working closely with product and engineering leaders in a fast-evolving AI space.

• Design, build, and maintain scalable backend services and APIs that support a high-throughput analytics platform.
• Architect and evolve distributed systems with a strong focus on reliability, maintainability, and performance at scale.
• Own full lifecycle delivery of backend initiatives, including technical design, implementation, testing, observability, and production support.
• Integrate AI capabilities such as LLMs, agentic frameworks, and related pipelines into core backend services and product features.
• Improve system reliability through robust observability practices, including logging, tracing, monitoring, and incident response.
• Collaborate closely with Product and Engineering stakeholders to define requirements, shape architecture, and deliver technical solutions.
• Contribute to engineering excellence through code reviews, design discussions, and continuous improvement of backend standards and practices.
• Work with cloud infrastructure environments such as GCP or AWS to support scalable, production-grade systems.

Requirements:

• Strong experience as a Senior Backend Engineer in high-ownership, product-driven engineering teams.
• Proficiency in at least one modern backend language such as Python, Go, or Ruby, with strong architectural and system design skills.
• Solid understanding of distributed systems, RESTful APIs, event-driven architectures, and scalable backend design principles.
• Experience optimizing database performance at scale, including indexing, query tuning, and working with large production datasets.
• Hands-on experience with cloud platforms such as GCP (preferred) or AWS.
• Strong knowledge of observability practices, including monitoring, logging, tracing, and incident management in production systems.
• Proven ability to independently deliver complex backend features in fast-paced engineering environments.
• Bonus: experience with LLMs, prompt engineering, or agentic AI frameworks (e.g., OpenAI, Anthropic, MCP).
• Bonus: familiarity with analytical databases (e.g., BigQuery, ClickHouse), search systems (e.g., Elasticsearch), or event-driven tooling (e.g., Kafka, Pub/Sub).
• Bonus: experience with AI-assisted development tools and workflows such as Cursor, Copilot, or Claude Code.
• Bonus: exposure to NLP, customer feedback analytics, or open-source contributions/public speaking.

Benefits:

• Flexible, choice-driven remote working environment.
• Work-from-home allowance to support your ideal setup.
• 25 days of annual leave plus local bank holidays.
• Additional day off on your birthday.
• Annual learning and development budget to support continuous growth.
• Equity options to share in company success.
• Monthly health and wellbeing budget, increasing with tenure.
• Optional private healthcare plan.
• Life assurance and income protection (depending on location).
• Enhanced family leave and additional support benefits (where applicable).
• Inclusive, collaborative engineering culture focused on learning, trust, and ownership.