Backend & AI engineer in HR tech

Our customer is a fast-growing, VC-backed HR-tech startup. Their product helps people automate their job search, from finding relevant roles to preparing applications. The team you’ll join works on one of the product’s features: an AI career coach that helps candidates assess their skills and prepare for interviews. You’ll work closely with product managers, designers and front-end engineers. We’re looking for a Senior Backend & AI Engineer (Python) to help build and develop the core architecture from scratch and ship the entire product.

• Design and implement scalable, secure, and efficient back-end services primarily in Python.
• Architect and develop advanced AI agents and stateful LLM conversational flows, managing short-term session context and long-term memory extraction.
• Build logic to evaluate user interactions and implement structured data pipelines to save, transcribe, and serve real-time session histories and system analytics.
• Own technical decisions for backend architecture, APIs, and microservices design.
• Explore and evaluate new tools, frameworks, and infrastructure to improve the product and infrastructure stack.
• Collaborate closely with product managers, designers, and front-end engineers to deliver impactful features.
• Proactively identify tech issues, lead the research, and resolve complex architectural bottlenecks.
• Help establish engineering best practices, code quality standards, and technical documentation as we scale.

• 5+ years of experience in back-end development with Python.
• Proven hands-on experience building AI agents, orchestrating complex LLM workflows, and deploying RAG pipelines.
• Experience with advanced AI orchestration and memory management frameworks (e.g., LangGraph, LangMem)
• Experience with Vector Search Engines (such as Qdrant) for high-performance data retrieval and artifact management.
• Experience with latency optimization for LLM streaming and database queries.
• Strong ownership: ability to do independent research, problem-solve, and unblock yourself autonomously.
• Strong knowledge of PostgreSQL and experience working with Object-Relational Mappers (ORMs).
• Experience in early-stage startups or building systems from scratch in a fast-paced environment.
• Proactive and highly autonomous, yet disciplined – you don’t wait to be told what to do, but you like and respect established team processes, are able to maintain organized workflows, and value a structured engineering environment.
• Result-oriented, hard-working with high ambitions.
• Strong English (B2 or higher).
• Будет плюсом: Experience with TypeScript, NestJS, or React, and a willingness to contribute across the stack if necessary; Knowledge of CI/CD pipelines and containerization with Docker; Experience with message brokers (e.g., NATS) for microservices communication; Experience in performance optimization and working with high-load or data-intensive systems; Expertise with subscription-based or B2B/B2C SaaS

• The benefit package will be discussed individually during the interview process.