Senior AI Engineer

* This is a remote position open to candidates in Europe. For those based in the Czech Republic, a hybrid work model is also 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

• 85+ 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 AI Engineer who brings creative thinking, problem-solving, and proactive technical expertise to help us 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

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

• Integrate APIs (e.g., LLM APIs (e.g. OpenAI, Anthropic, Gemini, Hugging Face) into applications leveraging NLP and image recognition

• Validate the output quality from AI models to ensure it aligns with business needs and provides value to end-users

• Work on prompt engineering tasks, working with embeddings and RAG, customizing LLMs

• Implement vector databases in Postgres for RAG systems

• 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

• Working with databases, data analysis, and data quality assessment

• 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

SKILLS & REQUIREMENTS

• Doctorate or Master's degree in Data Science, Computer Science, Mathematics, Statistics, or related field

• 3+ years of commercial experience building and shipping data science solutions

• Strong Python programming skills, with a focus on clean, maintainable, and production-ready code

• Solid foundation in statistical modeling, core ML algorithms, and optimization techniques.

• Hands-on NLP experience

• Working knowledge of LLM APIs (e.g., OpenAI, Anthropic, custom/private LLMs like MCP) for prompt engineering and model integration

• Proficiency in SQL and advanced data manipulation techniques.

• Proficiency in Exploratory Data Analysis and executing data quality assessment.

• Understanding of ML evaluation methodologies and managing data science experimentation pipelines.

• Excellent communication skills - able to explain complex concepts to non-technical stakeholders

• Strong problem-solving abilities with a pragmatic, innovative approach

• Proficiency in English

Nice to Have

• Exposure to Bayesian methods or other probabilistic modeling techniques.

• Experience with data orchestration tools and MLOps principles.

• Exposure to Full-stack development using TypeScript/JavaScript

BENEFITS

• Flexible working hours

• 26 days off + 1 additional day for every year working with OAK’S LAB (capped at 30 days)

• Budget to spend on your growth (books, courses, conferences)

• Team bonding, happy hours, online games, and annual offsite trips

• Outside of work, activity clubs (yoga, traveling, football, tennis, etc.)

• Snacks and drinks in the office, weekly pizza, and monthly breakfast

• Landmark office right on Old Town Square (dog-friendly)

• Free English lessons

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., john@oakslab.com or john@oaks-lab.com). 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).