Senior Fullstack Engineer (AI)

TL;DR

Senior Fullstack Engineer (AI): Building and optimizing a central GenAI Platform and impactful AI agents with an accent on rapid development, validation, and deployment capabilities. Focus on designing and shipping full-stack systems, shaping platform capabilities, and applying current LLM patterns for measurable customer value.

Location: Hybrid (8 days/month) in Warsaw, Poland

Company

hirify.global is a dynamic global technology company providing expert software and information solutions that advance sustainability, health, justice, prosperity, and commerce worldwide.

What you will do

• Design and implement full-stack applications, AI agents, and platform components that enable rapid GenAI agent development, validation, and deployment.
• Build developer tooling, CI/CD, and observability for safe, fast iteration, including evals, canaries, rollout/rollback, and telemetry.
• Apply secure SDLC and privacy-by-design practices, including threat modeling and 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 through writing high-quality, maintainable code, demonstrating engineering craftsmanship.

Requirements

• 5+ years of professional software engineering experience.
• Strong full-stack development skills and cloud experience (AWS/Azure/GCP).
• Proficiency across multiple areas, including AI Agent development and evaluation, Backend/Frontend development, Cloud services, CI/CD, SRE, Quality engineering, Secure SDLC, and privacy by design.
• Proven track record delivering secure, reliable, cloud-native systems to production.
• Excellent problem-solving, ownership, and cross-functional communication skills.
• English: B2 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 and iterative testing.
• Experience with LangChain/LangGraph, vector/RAG systems, and OpenSearch.
• Worked on traditional ML tasks like training, deployment, and monitoring.
• 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 making a difference in critical industries.
• Work in a 100-engineer team within a larger organization, combining the stability of an established company with the agility of a startup.
• High-autonomy, high-impact role where you will take problems from concept to production and directly contribute to impactful AI agents.
• Opportunity to advance sustainability, health, justice, prosperity, and commerce around the world.
• Thrive in a caring and inclusive culture where diversity is core to collective strength and high performance.

Hiring process

• 15-minute introductory screen.
• 2 live coding sessions in your preferred language.
• 1 systems design interview.
• 1 presentation of past work.
• Typically 2–4 weeks timeline.
• Interviews without assistance of AI tools or external prompts.
• Applicants may be required to appear onsite at a hirify.global office as part of the recruitment process.