AI Engineer

About the company: United Tech is a global IT product company shaping the future of real-time social connection. With millions of users across North America, Europe, LATAM, and MENA, we build next-gen mobile and web apps for live-streaming and social networking. Our platforms enable connection at scale fast, interactive, and deeply engaging. The market is projected to exceed $206B by 2030, and we are already leading the evolution. Founded in Ukraine, scaling worldwide

About your role: We’re looking for an AI Engineer who wants to build production-grade AI systems, not just experiment with demos. This is a high-ownership, greenfield role where you’ll help build our AI platform from scratch, working directly with the Head of AI. You’ll own initiatives end-to-end — from discovery and architecture decisions to production delivery — and play a key role in shaping how AI is used across the company.
You’ll work with a modern AI stack including Claude/OpenAI/Bedrock, RAG pipelines, eval frameworks (Promptfoo, Ragas, LangSmith), and agentic patterns. This role is ideal for someone who enjoys autonomy, strong engineering ownership, and proactively identifying the next highest-leverage opportunity to drive into production.

• 5+ years of production experience with Python (services, async, API integrations, clean and testable code).

• Hands-on experience with LLM APIs in production: Anthropic Claude (Opus/Sonnet/Haiku), OpenAI, AWS Bedrock.

• Strong understanding of RAG systems: chunking, embeddings, hybrid search, re-ranking, grounding/citations.

• Prompt engineering + structured outputs + tool/function calling.

• Experience with eval/regression frameworks: Promptfoo, Ragas, LangSmith, or custom evaluation harnesses.

• Agentic patterns: ReAct, function-calling loops, fallbacks.

• Vector databases: pgvector, Pinecone.

• Workflow orchestration: n8n, Airflow, or custom orchestration systems.

• Observability: token-spend tracing, latency monitoring, model routing.

• Solid AWS fundamentals: IAM, Lambda, S3, CloudTrail — comfortable deploying inside VPC environments independently.

• CI/CD + pipeline hooks (GitLab/GitHub), webhooks, event-driven architectures.

• Basic SQL skills for analytical queries and metrics dashboards.

• Driver mindset: proactively identifies the highest-leverage opportunity and drives it to production

• B2 English level


Would be a plus

• Real REST integrations with 2–3+ APIs

• Experience with workflow orchestration tools.

• Prompt evaluation tooling such as LangSmith is nice to have

• Experience with Docker

• RAG experience: embeddings and vector stores (pgvector, Pinecone, or similar) for knowledge base use cases

20 paid vacation days, 15 sick days, and 6 additional days off for family events

Up to 10 additional days off for public holidays

100% medical insurance coverage

Sports and equipment reimbursement

Team building events, corporate gifts, and stylish merch

Financial and legal support

Maternity recovery support allowance

Position retention and support for those who join the Armed Forces of Ukraine

Participation in social initiatives supporting Ukraine

Comfortable working environment:

Work from our Kyiv hub or remotely with a flexible schedule

Modern equipment or depreciation of your own tools

Investment in your future:

Collaborate with a highly-skilled team of Middle & Senior professionals, sharing practical cases and expertise in the social networking niche

70% of our heads and leads have grown into their roles here – so can you!

Performance-oriented reviews and Individual Development Plans (IDPs)

Reimbursement for professional courses and English classes

Corporate library, book club, and knowledge-sharing events

• Intro call

• Technical Interview

• Final Interview

• Reference check

• Offer