Software Engineer - AI & Conversational

Established Search Ltd; Barcelona; On-site; EUR 45,000 - 65,000; Full time

Job summary

Established Search Ltd in Barcelona is seeking a Software Engineer to join a growing AI-focused tech team. You will work across backend infrastructure, frontend applications and real-time intelligent systems, shaping technical decisions and building products from the ground up.

The role offers the chance to work on cutting-edge AI technology, with opportunities for international relocation as the company expands and scales its platform for real-world healthcare workflows.

Qualifications

• 3–5 years in software engineering
• Python (FastAPI) experience
• PostgreSQL or relational databases
• React + TypeScript
• Distributed systems design and scalability
• Asynchronous processing and orchestration
• Ownership from design to deployment
• Strong problem-solving skills

Responsibilities

• Design, develop and deploy scalable software solutions.
• Build and optimise backend services, APIs and frontend applications.
• Develop infrastructure for real-time AI applications.
• Work with distributed systems and orchestration workflows.
• Improve performance, reliability and architecture of the platform.
• Collaborate with engineering and product teams to bring capabilities to market.
• Take ownership of technical projects through the full SDLC.
• Support high volumes of real-time interactions.

Skills

Python

PostgreSQL

React/TS

Distributed systems

Async processing

Ownership

Education

Bachelor's degree or equivalent in CS/Engineering/Math/Physics

Job description

I'm partnering with an exciting, well-funded AI Digital health company that is transforming how healthcare organisations operate through intelligent automation. Backed by leading international investors and experiencing significant growth, the business is developing sophisticated, real-time AI solutions designed to streamline complex workflows, improve operational efficiency and reduce administrative burdens across healthcare.

About the Role

They're now looking for a talented Software Engineers to join their growing engineering team in Barcelona. This is an opportunity to work on genuinely cutting-edge AI technology, take ownership of complex technical challenges and contribute directly to the development of products already being used in real-world environments. For the right individual, there may also be opportunities for international relocation as the business continues to expand. You'll play a key role in building, developing and scaling a high-performance AI platform, working across backend infrastructure, frontend applications and real-time intelligent systems. This isn't a position where you'll simply maintain existing software. You'll have the opportunity to shape technical decisions, solve challenging engineering problems and build products from the ground up.

Responsibilities

• Design, develop and deploy scalable, production-grade software solutions.
• Build and optimise backend services, APIs and modern frontend applications.
• Develop infrastructure supporting real-time AI applications and intelligent automation.
• Work with distributed systems, asynchronous processing and complex orchestration workflows.
• Improve platform performance, reliability, scalability and system architecture.
• Collaborate closely with engineering and product teams to bring new capabilities to market.
• Take ownership of technical projects throughout the entire software development lifecycle.
• Help develop systems capable of supporting high volumes of real-time interactions.

Qualifications

• Degree in Computer Science, Engineering, Mathematics, Physics or a related discipline, or equivalent practical experience.

Required Skills

• 3–5 years of professional software engineering experience, ideally within a fast-paced technology or product environment.
• Strong experience with Python, ideally FastAPI or similar backend frameworks.
• Experience working with PostgreSQL or comparable relational databases.
• Proficiency with React and TypeScript, or equivalent modern frontend technologies.
• Experience designing, developing and maintaining scalable distributed systems.
• Understanding of asynchronous processing, workload orchestration and production infrastructure.
• Proven ability to take ownership of projects from initial design through to deployment.
• Strong problem-solving skills and an interest in tackling technically challenging problems.

Preferred Skills

• Experience with Large Language Models (LLMs), AI agents or machine learning applications.
• Exposure to conversational AI, speech technologies or real-time AI systems.
• Previous experience working within a startup or high-growth technology company.
• Experience building applications operating at significant scale.

About the Opportunity

• Cutting-edge technology: Work on advanced AI systems solving real operational challenges.
• High-impact engineering: Your work will directly influence product development, performance and scalability.
• Strong financial backing: Join an ambitious company supported by established technology investors.
• Career progression: Opportunities to take on greater technical ownership as the engineering organisation expands.
• International exposure: Collaborate with an international team, with potential future relocation opportunities.
• Startup environment: Join a business where ideas are valued, decisions move quickly and engineers have a genuine voice.