AI Engineer

Flutter International plc; Athens (GA); Hybrid; USD 150,000 - 210,000; Full time

Benefits offered by this job

Hybrid work

Generous annual leave

Health insurance

Paid sick leave

Paid parental leave

Performance bonuses

Job summary

Flutter Central & Eastern Europe is seeking a senior AI engineer to design, build, and scale AI-driven applications across front-end and back-end. You will integrate GenAI and Voice AI features, develop agentic AI architectures, and implement RAG pipelines with robust LLMOps practices.

The role involves cross-team collaboration across regions (UK, EU, USA, AU) and mentoring junior engineers in a fast-paced, innovative environment.

Qualifications

• 5+ years in machine learning, NLP or applied AI.
• Experience with LLMs (OpenAI, Claude, etc.) and vector DBs.
• Strong python and back-end API/microservice experience.
• Familiar with LLMOps, versioning, evaluation, observability, CI/CD.
• Proficiency with cloud platforms (AWS/GCP/Azure) and Voice AI tools.

Responsibilities

• Design, build, and maintain AI-driven apps and services across front-end and back-end.
• Integrate GenAI and Voice AI features into products.
• Develop agentic AI architectures and A2A interactions.
• Build RAG pipelines and fine-tune foundation models.
• Establish robust LLMOps practices including CI/CD for AI.
• Collaborate cross-regionally and mentor junior engineers.

Tools

LangChain

LlamaIndex

Agent SDKs

OpenAI models

Vector databases

LLMOps

AWS/GCP/Azure

Voice AI

APIs & microservices

Job description

We are Flutter Central & Eastern Europe (CEE).

As a proud member of the Flutter family - a global leader in sports betting and iGaming - we are building one of the Group`s most dynamic tech and product hubs in Central and Eastern Europe. We aren`t just here to participate; we`re here to change the game. By uniting local powerhouses like MaxBet, Adjarabet.com, and Adjarabet.am, we combine deep regional expertise with the scale and strength of Flutter`s global platforms. We are setting a new standard for entertainment, responsibility, and innovation — powered by real customer signals that shape everything we build. READY TO CHANGE THE GAME?
Join the Flutter Central & Eastern Europe team. This is where bold, ambitious minds build scalable platforms, drive innovation, and shape the future of iGaming in the region.
About the Role: you will join our AI & Innovation team as a senior engineer focused on designing, building and scaling advanced AI‑driven applications and services. You’ll work across front‑end and back‑end, integrating generative AI, voice AI, agentic systems, RAG pipelines, and LLMOps to deliver tangible business value.

Key Responsibilities

AI Product Development

Design, build, and maintain AI-driven applications and services, including front-end and back-end components.

Collaborate across teams to integrate AI features into customer-facing and internal products.

GenAI & Voice AI Integration

Implement cutting-edge frameworks (e.g., LangChain, LlamaIndex, Agent SDKs) to enable advanced GenAI and multimodal use cases.

Develop voice-enabled features using STT, TTS, and real-time voice synthesis for conversational interfaces.

Agentic AI & A2A Protocols

Design and deploy agentic AI systems with tool-using, multi-step reasoning capabilities.

Enable agent-to-agent (A2A) interactions for coordination, delegation, and multi-agent task execution across systems.

RAG & LLMOps Engineering

Build and maintain retrieval-augmented generation (RAG) pipelines and model fine-tuning workflows.

Establish robust LLMOps practices—covering versioning, prompt management, automated evaluations, monitoring, and CI/CD for AI.

API & Data Infrastructure

Develop secure, scalable RESTful APIs and data pipelines to support both real-time and batch AI applications.

Work with structured and unstructured data using relational and NoSQL databases.

Testing, Optimization & Reliability

Write unit/integration tests, monitor production performance, and optimize AI systems for latency, uptime, and scalability.

Cross-Team Collaboration

Work closely with product managers, designers, and engineers across regions (e.g. UK, EU, USA, AU).

Mentor junior engineers and help define AI development best practices.

Requirements

5+ years of experience in machine learning, NLP, or applied AI

Proven experience with LLMs (OpenAI, Claude, Mistral, open-source models), vector databases, and orchestration frameworks

Demonstrated ability to build RAG systems , fine-tune foundation models, and design agentic AI architectures

Hands-on experience with A2A, MPC protocols or frameworks for multi-agent collaboration

Strong Python development skills and back-end experience building scalable APIs and microservices

Deep understanding of LLMOps : versioning, evaluation frameworks, model observability, CI/CD for AI/ML

Experience with cloud platforms (AWS, GCP, or Azure) and secure, distributed AI infrastructure

Familiarity with Voice AI technologies (Whisper, Deepgram, ElevenLabs) is a strong plus

Background in experimentation frameworks (A/B testing, reinforcement learning)

Strong communication and collaboration skills in cross-cultural, distributed environments

Why choose us

At Flutter CEE, people have access to vast opportunities for career growth and self-development. Our employee benefits package goes far beyond offering the minimum: We support our people in becoming their best version at work and beyond - and our benefits reflect that commitment.

Generous annual leave

Hybrid work

Individual health insurance

Paid sick leave

Paid maternity & paternity leave

Family reward

Performance & referral bonuses