AI Engineer Middle / Middle+ [AI Team]

Plata Card; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Relocation support

Flexible work

Healthcare Coverage

Education Budget

Wellness Budget

Vacation policy

Job summary

Plata Card is hiring AI Engineers for the AI Team. You will join a cross-functional group with backend and LLama engineers to deliver AI-driven automation and conversational solutions.

The role focuses on model selection, prompt engineering, and building end-to-end AI pipelines, including OCR and data validation across business documents. Strong Python skills and experience with LLM providers are preferred.

Qualifications

• Hands-on experience with LLMs, focusing on prompt engineering and pipeline integration.
• Knowledge of quality evaluation metrics and practical ML A/B testing.
• Ability to justify model choices and architect efficient engineering solutions.
• Experience delivering production-grade software with CI/CD and full lifecycle ownership.
• Strong Python skills and willingness to work language-agnostic across tools and libs.
• Familiarity with OpenAI, Anthropic, Cohere and open-source LLMs (e.g., Llama, Mistral).
• Experience with open-source tools to build and evaluate RAG apps such as LangChain, LlamaIndex, Ragas, MLflow.
• Excellent communication to explain complex concepts to stakeholders; English at least B1.
• English proficiency (B1 or higher) for international collaboration.

Responsibilities

• Develop and manage AI/ML pipelines using Large Language Models and robust wrappers.
• Work with prompts, RAG data sources, and evaluate outputs for accuracy and relevance.
• Implement OCR solutions to read, analyze, and validate business documents.
• Design experiments and A/B tests to compare prompts, pipelines, and model configurations.
• Collaborate with backend and other engineers to deliver top-notch AI solutions.

Skills

LLM experience

Prompt engineering

ML pipelines

Model integration

Tools

LangChain

LlamaIndex

Ragas

MLflow

Job description

We are looking for AI Engineers for AI Team - a team is focused on two exciting goals: using AI tools to automate business processes across the company, and bringing AI solutions to everyone to boost productivity and spark interest in AI concepts among decision-makers.

We use AWS, Go, Python and cloud-based models, yet still flexible to mix ready‑made tools and ship our custom solutions.We’re all about building systems that deliver real, valuable results for our organization. Our team has successfully pioneered a portfolio of AI solutions, including customer care chatbot, voice solutions, speech‑to‑text services, and an integrated HR automation ecosystem.

You will be a key specialist in a cross-functional team, working closely with backend and other LLM engineers.

Challenges that await you:

• Develop and manage AI/ML pipelines using Large Language Models. Your focus will be on model selection, configuration, creating robust wrappers, and designing the overall pipeline for data storage and retrieval
• Work with advanced prompts, set up RAG‑oriented data sources for efficient retrieval, and evaluate model outputs to ensure accuracy, relevance, and quality
• Implement and refine advanced OCR solutions to automatically read, analyze, and validate business documents. This includes tasks such as identifying and extracting key entities, verifying their attributes, and ensuring data consistency across documents
• Design and execute experiments and A/B tests to systematically compare the performance of different prompts, pipelines, and model configurations. You will use metrics to drive product decisions and continuous improvement cycles
• Work with the rest of the team to solve complex AI implementation challenges, review code, and ensure we deliver top-notch solutions

What makes you a great fit:

• Hands‑on experience working with LLMs, with a strong focus on prompt engineering, building ML pipelines, and model integration
• Understanding of quality evaluation metrics and practical experience with A/B testing for ML models
• Ability to prioritize hypotheses, clearly justify the selection of specific models, methods or algorithms, and architect efficient engineering solutions
• Experience delivering high‑quality software, CI/CD pipelines, and end‑to‑end ownership of the development lifecycle from technical design to post‑deployment monitoring
• Expertise in Python and its ecosystem, as well as language‑ and framework‑agnostic mindset to achieve project goals
• Familiarity with various options for LLM providers, both commercial such as OpenAI, Anthropic, Cohere, etc, and open‑source, such as Llama and Mistral
• Familiarity with various open‑source tools to build and evaluate RAG applications such as LangChain, LlamaIndex, Ragas, MLflow etc.
• Excellent communication skills and ability to explain complex technical concepts to a broad audience of stakeholders
• B1 or higher English level for effective communication with an international team

Your bonus skills:

• Previous experience delivering business‑critical ML/AI‑powered applications
• Experience with adapting, fine‑tuning, and deploying open‑source models (e.g., Llama, Mistral) in an on‑premise or private cloud environment
• Personal portfolio of hobby ML projects or contributions to open‑source tools

Our ways of working:

• Innovative Spirit: A commitment to creativity and groundbreaking solutions
• Honest Feedback: valuing open, transparent communication
• Supportive Team: a strong, collaborative community
• Celebrating Achievements: recognizing our wins together
• High-Tech Environment: a team full of smart and revolutionary people who date to challenge the status quo of incumbent finances

Our benefits:

• Relocation support to one of our hubs - Cyprus, Serbia, Georgia or Kazakhstan - with assistance for the employee and their family
• Flexible work from one of our offices or remotely within time zones from GMT-2 to GMT+5
• Healthcare Coverage
• Education Budget: Language lessons, professional training and certifications
• Wellness Budget: Mental health and fitness activity reimbursements
• Vacation policy: 20 days of annual leave and paid sick leave