Fullstack Developer - GenAI Systems

Salary: 1200-1500 pln/md on B2B

Work model: Remote or elastic hybrid from Gdynia / Warszawa / Rzeszów

Why choose this offer?

• Join a key innovation program shaping the future of financial analysis through Generative AI

• Work at the intersection of finance and cutting-edge AI, building real-world tools used by major banks and asset managers

• Collaborate directly with international financial institutions, including top-tier investment and commercial banks

• Be part of an R&D-focused team dedicated to rapid prototyping and experimenting with frontier LLMs and agentic systems

• Contribute to scalable, production-grade AI solutions that enhance the decision-making of financial professionals globally

• Thrive in an international, innovation-driven environment with access to the latest AI tools and frameworks

Project

You will be involved in a project as a Fullstack Developer, helping to transform the day-to-day work of financial analysts by leveraging the potential of Generative Artificial Intelligence (GenAI). The initiative focuses on creating and implementing innovative solutions integrated into existing financial analysis workflows. Project teams work closely with global asset managers and banks to design, test, and refine tool prototypes based on agentic architectures and state-of-the-art large language models (LLMs). The aim is to automate routine tasks and enable deeper, scalable data analysis. The project is led by an international team focused on rapid experimentation and innovation deployment.

Responsibilities

• Design and implement end-to-end RAG systems and AI interfaces

• Develop vector search solutions and custom embedding approaches

• Create AI feedback loops and monitoring systems

• Implement AI caching strategies and security middleware

• Design and optimize LLM system architectures

• Build AI error handling and recovery UIs

• Develop multi-agent systems for complex workflows

• Implement AI data validation pipelines and quality monitoring

• Create AI security measures, including prompt injection prevention

• Help scale and optimize AI applications

Expected Competences and Knowledge

• 12+ years of experience in Fullstack development

• Proficiency in multiple programming languages (Python, Java, JavaScript)

• Knowledge of event-driven architectures

• Experience with production-grade LLM systems

• Hands-on experience with LLM-based applications

• Familiarity with AI monitoring tools and testing frameworks

• Master’s or PhD in Computer Science, AI/ML, or a related field

Nice to have:

• Involvement in the GenAI community (e.g. publications, open-source contributions, blogs)

• Advanced certifications in GenAI development

• Experience with hybrid LLM architectures and model deployment

• Expertise in multi-agent system architecture

• Experience in AI cost optimization frameworks

• Understanding of AI data versioning systems

Technologies you'll work with

• Python

• Java

• JavaScript

• GenAI Architectures 

• LLMs

• Agentic Systems

• Cloud platforms: AWS, Azure, GCP

• Event-Driven Systems

• Vector Databases

• Embedding Technologies

• AI Feedback, Monitoring and Security Tools

Client – why choose this particular client from the Jit portfolio?

A global provider of financial research support services, part of a leading multinational analytics organization. The company serves a substantial share of the financial sector, including 15 of the top 20 investment banks and 35 of the top 50 commercial banks. It offers offshore analyst teams and specialized tools to enhance financial analysis workflows at scale.

About Jit Team

The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 500 experienced experts. We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme.

Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity. By supporting indigenous initiatives, we ensure the circulation of good energy.