Senior Fullstack Engineer (AI Focused)
**This is a remote position open to candidates in Europe and Turkey. For those based in the Czech Republic, a hybrid work model is available.
ABOUT US
We are a leading product development partner specializing in custom web and mobile application development. With Silicon Valley founders and top-tier European tech talent, we operate from Prague and have successfully delivered over 65 software products for early-stage startups, scaleups, and global enterprises.
Founded in 2016
Headquartered in Prague
Built and launched 65+ products
90+ team members
Driving product innovation for leading US companies
At OAK’S LAB, we take an AI-first approach, utilizing AI on almost every project. From streamlining design and testing workflows to enhancing developer productivity, our teams leverage tools such as Figma MCP Server, Playwright MCP Server, and Cursor, and we’re actively experimenting with remote AI agents to push the boundaries of what’s possible in product development.
OUR PROJECTS
Here are a few from our portfolio:
Nasdaq Private Market (Series C, Finance)- nasdaqprivatemarket.com
Blackpoint Cyber (Series B, Cybersecurity) - blackpointcyber.com
OpenLoop (Series A, Healthcare) - openloophealth.com
THE ROLE
Our product development team is seeking a Senior Full-Stack Engineer who brings creative thinking, problem-solving, and proactive technical expertise to build outstanding web and mobile applications for our clients. You’ll be working on cutting-edge projects, solving challenges that were previously unsolvable without the use of AI
We are specifically looking for engineers who have hands-on experience building AI-driven solutions and integrating AI models into production applications. This includes practical experience working with LLM APIs, AI-powered workflows, retrieval systems, or other AI integrations that deliver meaningful value to end users.
In this role, you will work within a dedicated product team consisting of the Tech Lead for the specific product, a Product Manager, a Designer, and a skilled team of engineers to drive the product’s success. From engaging in technical discussions to engineering complex features, your involvement spans the entire product development lifecycle.
RESPONSIBILITIES
Design scalable, modular, and maintainable architectures for AI-powered applications
Collaborate with product teams to understand feature requirements and translate them into technical solutions leveraging AI models
Integrate APIs (e.g., LLM APIs (e.g. OpenAI), Hugging Face API) into applications for tasks such as NLP and image recognition
Implement prompt engineering, embeddings, and other techniques to customize model outputs without building models from scratch
Implement vector databases in Postgres for RAG
Use tools like Hugging Face’s Transformers to further customize pre-trained models to suit specific project requirements
Optimize server-side logic to ensure efficient querying and integration with AI tools
Work with unstructured data (text, images, etc.) and convert it into model-ready formats
Validate the output quality from AI models to ensure it aligns with business needs and provides value to end-users
SKILLS & REQUIREMENTS
6+ years in engineering
3+ years of experience in building web solutions using Node.js and React
Experienced with Javascript/Typescript
Hands-on experience building AI-driven solutions and integrating AI models or AI-powered services into production applications
Focus on code quality
Desire to learn new technologies
Strong analytical and problem-solving skills
Proactiveness and the capability to make a difference
Driven, hard work ethic, showing commitment
Ability to work effectively in a team environment, following Agile methodologies
Proficiency in English
TECH STACK
TypeScript
Node.js
React + Next.js
React Native
GraphQL, tRPC
Google Cloud Platform
HuggingFace API, LLM APIs (eg OpenAI API), Langchain
Postgres/Vector Databases for RAG
Important Notice: OAK'S LAB communication, including interview requests and job offers, are only sent from an "@oakslab.com" or "@oaks-lab.com " email addresses (e.g., [email protected] or [email protected]). Any message from a different email domain is not associated with OAK'S LAB. We will never ask for payment information or banking details via email, phone, or any other communication channel during the interview process. If you receive messages using our name, domain, or brand assets in an attempt to impersonate us or act on our behalf, do not engage. Instead, report it to Econsumer.gov at Government Shutdown Notice / Aviso de cierre del gobierno (if you are in the EU), Federal Trade Commission (FTC) at Government Shutdown Notice / Aviso de cierre del gobierno , or the Securities and Exchange Commission (SEC) in case of investment fraud at SEC.gov | Report Suspected Securities Fraud or Wrongdoing (if you are in the US).