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Offer summary
(Summary generated by AI based on the full job description)
The project combines full-stack engineering with AI/ML, focusing on deploying and optimizing LLMs, RAG, and search systems. It requires TypeScript, Node.js, Nest.js, React, PostgreSQL, Redis, Docker skills and integrating AI with external services. Responsibilities include application design, model selection, writing clean code, and mentoring. Benefits include private medical care, life insurance, sports budget, working with modern GPU infrastructure and more perks.
Senior AI / Full Stack Engineer (TypeScript/Node.js, React)
Company: Webellian Sp. z o.o.
from: 11 June 2026
to: 11 July 2026
salary not specifiedB2B contract (full-time)
salary not specifiedcontract of employment
Offer parameters
level:senior
working mode:hybrid
Warszawa, Mokotów
Requirements
Expected technologies
TypeScript
Node.js
Nest.js
React
PostgreSQL
Redis
Optional technologies
angChain
Vercel AI SDK
Our requirements
- AI/ML:
- Hands-on experience with LLM deployment and serving (cloud APIs and/or self-hosted solutions)
- Experience building RAG systems (embeddings, vector stores, retrieval strategies)
- Understanding of prompt engineering and agent/tool-use patterns
- Ability to evaluate model performance and make informed trade-off decisions
- Full Stack:
- 5+ years in full-stack development with TypeScript/Node.js, Nest.js
- Frontend experience with React
- Relational databases (PostgreSQL or similar), Redis
- Docker, basic CI/CD
- Soft skills:
- Self-driven, able to take ownership of projects end-to-end
- Strong problem-solving skills
- English B2+ (C1 preferred)
- Excellent communication - able to translate technical concepts for non-technical stakeholders
Optional
- Experience with model fine-tuning (LoRA, QLoRA)
- MLOps practices (experiment tracking, model versioning)
- Familiarity with agent frameworks (LangChain, Vercel AI SDK, or similar)
- Experience with GPU infrastructure and model optimization (quantization, inference tuning)
- AWS or other cloud provider (working knowledge)
Your responsibilities
- Designing and developing full-stack applications with AI capabilities
- Deploying, configuring, and optimizing LLMs (both cloud APIs and self-hosted)
- Building and maintaining RAG pipelines, vector search, and knowledge retrieval systems
- Integrating AI systems with external services and APIs
- Evaluating and selecting appropriate models and tools for specific use cases
- Writing clean, maintainable code with tests and documentation
- Proposing technical improvements and architectural decisions
- Supporting and mentoring less experienced team members
About the project
We are seeking a Senior AI/Full Stack Engineer to join our team and drive the development of AI-powered solutions for our clients. You will work on projects that combine modern web development with applied AI - from building intelligent agents and search systems to deploying and optimizing language models on dedicated infrastructure.
This role bridges two worlds: solid full-stack engineering and practical AI/ML implementation. You'll design, build, and ship products that leverage LLMs, RAG, and other AI techniques to solve real business problems.
This is how we organize our work
This is how we work
agilescrum
This is how we work on a project
- Continuous Deployment
- Continuous Integration
- issue tracking tools
- testing environments
Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply ➡️
What we offer
- Projects at the intersection of AI and software engineering
- Opportunity to work with cutting-edge AI tooling and local GPU infrastructure
- Autonomy and ownership over technical decisions
- Hybrid work mode
- Small, collaborative team
- Challenging problems - no boring CRUD work
Benefits
- sharing the costs of sports activities
- private medical care
- life insurance
- remote work opportunities
- fruits
- video games at work
- coffee / tea
- drinks
- parking space for employees
- leisure zone
- Pinball, PlayStation & much more
- English classes
Recruitment stages
- 1.📞A quick phone call with our Recruiter.
- 2.📅Online technical interview, testing your skills.
- 3.📅II face-to-face interview with your potential supervisor.
- 4.🗒️Feedback.
Webellian Sp. z o.o.
Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy.
This is how we work
Senior AI / Full Stack Engineer (TypeScript/Node.js, React)
I apply to:
Webellian Sp. z o.o.
Warszawa, Mokotów
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