Senior Lead Machine Learning Engineer, Agentic AI (AI Engineering)

TL;DR

Senior Lead Machine Learning Engineer, Agentic AI (AI Engineering): Leading the end-to-end development of AI agents and the platform that powers them, from LLM training and evaluation to runtime orchestration and developer APIs with an accent on building reliable, safe, and high-performing agents. Focus on multi-agent systems design, data strategy for agent tasks, and architecting low-latency inference and orchestration services.

Location: Lisbon, Portugal. Initially employed through a partner while hirify.global establishes its international operational hub, expected to be fully operational by Q4 2026.

Company

hirify.global Inc.’s family of companies connects businesses with global, AI-enabled talent across every contingent work type including freelance, fractional, and payrolled.

What you will do

• Design and implement multi‑agent systems with robust guardrails and recovery strategies.
• Lead data strategy and curation for agent tasks; drive SFT, DPO, RLHF/RLAIF, and safety tuning tailored to multi‑tool, multi‑step workflows.
• Architect low‑latency inference, retrieval, and orchestration services with strong SLOs.
• Ship production‑grade services that make agent features easy to integrate for internal and external developers.
• Provide technical leadership across research, product, and platform teams; mentor senior ICs; influence roadmaps with clear metrics and trade‑offs.
• Define and track KPIs for data/quality/throughput, and drive continuous improvement using experiment results and production telemetry.

Requirements

• 8–12+ years in applied ML/ML systems with 4+ years building LLM‑powered products; proven delivery of agentic workflows in production.
• Hands‑on mastery of LLM adaptation, data curation, and safety/guardrails.
• Strong software fundamentals and experience building high‑throughput microservices/APIs/SDKs.
• Fluency with Python; proficiency in one of Go/Java/Javascript a plus.
• Experience designing eval suites for agents and closing the loop from evals → training → runtime policy.
• Track record of leading cross‑functional initiatives and mentoring senior engineers; excellent written communication and bias for measurable results.

Culture & Benefits

• hirify.global is establishing its first international operational hub in Lisbon, Portugal.
• This position will initially be employed through a partner to ensure a seamless hiring process while they establish the hub.
• Work as part of hirify.global’s team, with access to our resources, culture, and growth opportunities.
• Our partner will offer competitive benefits.
• hirify.global is committed to building a diverse, inclusive, and equitable workforce.