5Blue Software
About Us
5Blue Software is an Israeli-Ukrainian software development company specializing in custom software development, staff augmentation, dedicated engineering teams, AI solutions, and CTO-as-a-Service. We help startups and mid-sized companies scale faster with vetted engineering talent across Europe.
About the Role
We are looking for a Senior AI Engineer to join one of our client projects — an early-stage US-based wellness AI startup. You will work as a fractional contributor, starting with a structured technical handoff from the outgoing engineering team, then transitioning into ongoing launch support and system maintenance. You will need to take real technical ownership, communicate clearly with the client, and hit the ground running with minimal onboarding from our side.
Requirements
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7+ years of software engineering experience
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Expert-level proficiency in AI/ML engineering
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Excellent spoken and written English (C1) — direct client communication is required
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5+ years working with LLMs — Claude, OpenAI, or equivalent — in production environments
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Hands-on experience building agentic and multi-turn conversational systems
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Strong prompt engineering skills — system prompts, structured outputs, context management, cost vs. quality tradeoffs
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Experience with tool/function calling, memory layers, and RAG pipelines
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Familiarity with LLM observability — logging, tracing agent steps, monitoring output quality
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Understanding of prompt injection risks, output validation, and guardrails
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Ability to get up to speed on an unfamiliar codebase quickly and document it clearly
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Experience with messaging integrations will be a plus
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Self-directed and comfortable taking ownership with minimal oversight
Does this position sound like a perfect match? We’re eager to hear from you!
Originally posted on Himalayas
To apply for this job please visit himalayas.app.
About this role & career path
Working in Poland
Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, and borders Lithuania and Russia to the northeast; Belarus and Ukraine to the east; Slovakia and the Czech Republic to the south; and Germany to the west. The territory has a varied landscape, diverse ecosystems, and a temperate climate. Poland is composed of sixteen voivodeships and is the fifth most populous member state of the European Union (EU), with over 38 million people, and the fifth largest EU country by land area
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