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?

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• Take on a fullstack engineering role at the heart of a strategic innovation program, shaping the future of financial analysis through Generative AI
• Combine frontend and backend development skills to build advanced tools used daily by major banks and asset managers
• Collaborate directly with international financial institutions, including top-tier investment and commercial banks
• Contribute to scalable, production-grade AI solutions in an international, innovation-driven environment, empowering financial professionals worldwide with the latest tools and frameworks

 

 

Project

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We’re looking for an experienced Full Stack Developer with AI expertise to join an international innovation team building cutting-edge GenAI applications. You’ll be responsible for developing end-to-end solutions—from backend architecture to frontend interfaces—that transform how financial analysts work at scale.

 

Generative AI is reshaping the financial industry by automating repetitive tasks and enabling deeper, faster analysis. This initiative is focused on integrating GenAI into real-world financial analysis workflows through advanced agentic systems and frontier LLMs. Solutions are co-developed with global asset managers and banks to ensure real usability and impact. You’ll be part of a fast-paced prototyping team that leverages the latest in agentic architectures, experimentation frameworks, and AI tools to build and test high-value applications.

 

 

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

• 10+ years of experience in Fullstack development
• Proficiency in multiple programming languages (Python, Java, JavaScript)
• Experience with cloud platforms (AWS, Azure, GCP)
• 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

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• 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?

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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

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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.