Senior Developer – GenAI

Job Title:Senior Developer – GenAI

Location:Warsaw,Poland

Employment Type:Hybrid

About Hirexa Solutions:

Hirexa Solutions is a leading player in the recruitment ecosystem across the United States, United Kingdom, Europe, and India. As the fastest-growing next-generation provider of technology talent, we empower our clients to become resourceful, achieve higher productivity, adopt agile structures, and effectively execute project deliverables.

Envisioned and co-founded by veterans of the Information Technology industry, our mission is to make recruitment efficient, flawless, and cost-effective. Our unwavering commitment to strategic investments in intelligent technology underscores our passion for people and our dedication to helping organizations realize their true potential.

Job Description

Designing and implementing backend systems to support Generative AI workflows and services.

Developing microservices and APIs that integrate with GenAI models, vector databases, and orchestration tools (e.g., LangChain, LangGraph).

Building scalable infrastructure for deploying and serving LLMs and AI pipelines in production environments.

Creating and maintaining data pipelines to support GenAI use cases, including prompt data processing and model feedback loops.

Participating in architecture reviews focused on optimizing GenAI system performance, latency, and modularity.

Collaborating with AI/ML engineers to enable plug-and-play components (e.g., Intent Resolver, Tool Agent, LLM Gateway) in agentic workflows.

Debugging, profiling, and optimizing GenAI applications, including prompt execution paths, model inference, and external API integration.

5+ years of total experience in IT

1+ years of hands-on experience with GenAI technologies — including LLMs, prompt engineering, embeddings, fine-tuning, or building RAG (Retrieval-Augmented Generation) pipelines.

Strong programming skills in one or more languages such as Python, Java, or Scala, with a solid foundation in software design principles, testing, and version control (e.g., Git). Python developers are preferred.


Strong backend engineering background with expertise in building scalable systems using Python, C#, Java or similar, and hands-on experience with microservices, REST APIs, Kafka, and cloud platforms (AWS/Azure) — preferably with exposure to secure, low-latency architectures.

Demonstrated interest or experience in GenAI/Agentic AI systems — including building or integrating with LLMs (e.g., OpenAI, Claude), use of tools like LangChain, LangGraph, Copilot, or vector DBs, or implementing AI agent orchestration logic in real-world workflows.

Comfortable working in AI-first environments, with experience using modern developer tools (e.g., Docker, Kubernetes, CI/CD, Git), and exposure to prompt engineering, embeddings, or AI-based toolchains preferred.

Position Overview:

For one of our partners, we are seeking a GENAI Developer who will be responsible for GenAI, LLMs, RAG, Python, Java, or Scala, REST APIs, Kafka, and cloud platforms (AWS/Azure). The ideal candidate will possess the necessary skills and experience to contribute to the success of our partner organization.

How to Apply:

If you are interested in this opportunity, please submit your resume. We look forward to hearing from you!