Senior Backend Developer

You’ll join as a Senior Full-Stack Engineer with hands-on experience building products powered by LLMs, contributing directly to the development of our AgentSee AI platform.

RESPONSIBILITIES

• Design, build, and scale AI-driven systems that power our virtual agent capabilities (conversational reasoning, retrieval, and automation flows)

• Develop backend services and data pipelines that integrate multiple APIs (Amadeus, Sabre, internal systems) to support real-time decision-making

• Collaborate with other teams to ship LLM-based features that deliver measurable impact

• Own architecture decisions for distributed, high-performance AI applications

• Continuously improve model performance, reliability, and monitoring frameworks

• Help define our engineering best practices, guide technical decisions, and mentor other developers within the team

REQUIREMENTS

• 5+ years of experience in software engineering, with a track record of building production systems

• Strong background in designing scalable, distributed applications 2

• Proven hands-on experience developing or integrating products using LLMs (e.g., RAG pipelines, custom agents, fine-tuning, or orchestration frameworks like LangChain/LlamaIndex)

• Hands-on experience with Python

• Solid understanding of Linux runtime environments

• Skilled at identifying and solving performance bottlenecks

• Excellent collaboration skills with the ability to give and receive constructive feedback

• Fluent in English, with strong written and verbal communication

• Proactive, curious, and eager to keep learning

NICE TO HAVE

• Experience with the travel industry (especially GDS APIs like Sabre, Amadeus, or Travelport)

• Hands-on with Kubernetes, AWS, Terraform, and CI/CD practices

• Contributions to open-source projects or notable side projects

• Familiarity with agile methodologies and collaborative product development

WHAT DO WE OFFER ON THIS PROJECT?

• Employment directly through the client.

• Cooperation based on a B2B.

• 100% remote work.

WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE?

Application: Apply and submit your CV.

After the application review, the recruiter will contact selected candidates by phone.

Screening: Have a conversation with a speedapp recruiter about your experience.

Next steps: The speedapp recruiter will explain the recruitment process for the specific position.

The speedapp recruiter will stay in touch with you throughout the entire process.

ABOUT SPEEDAPP

At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them.

👉 10 years of experience

👉 +100 clients worldwide 

+300 hires per year

💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch.

DO YOU HAVE ANY QUESTIONS?

Contact the recruiter responsible for this process directly.

Barbara KrawczykJunior IT Delivery Consultantbarbara.krawczyk@speedapp.pl+48 734 469 838