Lead/Staff Fullstack Engineer (AI)

TL;DR

Lead/Staff Fullstack Engineer (AI): Designing and implementing full-stack applications, AI agents, and platform components for a central GenAI platform with an accent on rapid development, validation, and deployment. Focus on applying current LLM patterns, building developer tooling, and driving architecture for secure, reliable, cloud-native AI systems.

Location: This role is hybrid, requiring 8 days per month onsite in Warsaw, Poland. Applicants may be required to appear onsite at a hirify.global office as part of the recruitment process.

Company

hirify.global is a global technology company providing expert software and information solutions that empower professionals in critical industries like health, justice, and commerce.

What you will do

• Design and implement full-stack applications, AI agents, and platform components for rapid GenAI agent development, validation, and deployment.
• Build developer tooling, CI/CD, and observability for safe, fast iteration (evals, canaries, rollout/rollback, cost and quality telemetry).
• Apply secure SDLC and privacy-by-design practices (threat modeling, least privilege).
• Collaborate with product, UX, and domain experts to deliver customer-focused solutions with measurable outcomes.
• Apply current LLM patterns (RAG, retrieval, routing, tool-use, evals) to deliver measurable customer value.
• Lead by example, drive architecture, mentor engineers, and take ownership of larger projects.

Requirements

• 5+ years of professional software engineering experience.
• Strong full-stack development skills and cloud experience (AWS/Azure/GCP).
• Expertise in at least one, and proficiency across others: AI agent development/evaluation, backend/frontend development, cloud services, CI/CD, IaC, SRE, quality engineering, secure SDLC, and privacy by design.
• Proven track record delivering secure, reliable, cloud-native systems to production.
• Participation in interviews without AI tools or external prompts is required.

Nice to have

• Proven ability to deliver software products independently or as part of a small, fast-paced team.
• Experience taking AI agents from concept to production, including safety evaluations, iterative testing, and continuous improvement.
• Experience with LangChain/LangGraph, MCP, vector/RAG systems, and OpenSearch.
• Understanding of LLMs, their failure modes, and techniques like fine-tuning and model adaptation.
• Familiarity with regulatory frameworks such as SOC2, HIPAA.

Culture & Benefits

• Join a dynamic global technology company providing expert software and information solutions.
• Be part of a remote-first team within a larger organization, combining stability with startup agility.
• High autonomy, high-impact role with opportunities to mentor engineers and lead projects.
• Contribute to advancing sustainability, health, justice, prosperity, and commerce globally.
• Caring and inclusive culture where diversity is valued.

Hiring process

• 15-minute intro screen.
• 2 live coding sessions in your preferred language.
• 1 systems design session.
• 1 presentation of past work.
• Typically 2–4 weeks timeline.