Senior GenAI Engineer LLM Developer

Cluj-Napoca - Romania

Monthly Salary: Not Disclosed

Posted on: 30+ days ago

Vacancies: 1 Vacancy

Job Summary

About Nexttech

Founded in 2015 Nexttech has built a solid foundation in delivering comprehensive IT solutions tailored to meet diverse client needs. With expertise spanning five key industry sectorsBanking Energy Telecom Automotive andE-commerce & Logisticswe provide nearshore and onshore services designed to drive efficiency and support strategic growth.

Our team supports every phase of the Software Development Life Cycle (SDLC) from developing detailed roadmaps and resolving complex software challenges to ensuring quick time-to-market and optimized ROI.

About the Role:

LLM-Powered Multi-Agent Platform for Engineering Systems

We are looking for a Senior GenAI / LLM Developer to help build a production-grade AI agent platform designed to integrate with enterprise engineering tools and processes in the energy industry.

The project focuses on developing a LLM-powered multi-agent infrastructure that can orchestrate tasks interact with multiple engineering platforms and support complex technical workflows used by engineers.

You will work on building and integrating AI agents capable of interacting with existing systems tools and data sources enabling engineers to interact with their engineering ecosystem through intelligent interfaces.

This is a hands-on engineering role focused on building real production systems where strong engineering execution is essential.

You should be comfortable working with modern AI frameworks backend development and building integrations across multiple platforms within a distributed engineering environment.

Key Responsibilities:

LLM & Agentic System Development:
Design and implement AI agents powered by LLMs that interact with engineering tools APIs and internal systems.

Agent Orchestration & Workflows:
Build multi-agent workflows that coordinate tasks across different systems including prompt orchestration tool calling task routing and agent collaboration.

Platform Integration:
Develop integrations with multiple engineering platforms APIs and services to enable agents to execute workflows across the engineering ecosystem.

Backend Development (Python-first):
Build backend services using Python (e.g. FastAPI) that support agent execution orchestration logic and system integration.

LLM Application Architecture:
Design scalable LLM application components including prompt pipelines agent control logic response validation and interaction flows.

Data & Knowledge Integration:
Enable agents to retrieve and process information from structured and unstructured data sources across enterprise systems.

API & Tooling Integration:
Develop APIs and connectors allowing agents to interact with internal tools services and engineering platforms.

Containerized Deployment:
Package services using Docker and support deployment pipelines within a cloud-based infrastructure.

Collaboration:
Work closely with infrastructure engineers frontend developers cloud architects DevOps engineers and product stakeholders to iteratively improve the platform.

Must-Have Skills & Experience:

Strong Python Skills (Mandatory):
Solid experience building backend systems with Python (FastAPI async programming API development).

LLM & Agentic Systems Experience:
Hands-on experience building LLM-powered applications and agent workflows using technologies such as: LangChain; LangGraph; OpenAI / Azure OpenAI APIs; Prompt engineering; Tool calling / agent orchestration

AI Application Integration:
Experience integrating LLM-based services with external platforms APIs or enterprise systems.

Backend Architecture & APIs:
Strong understanding of REST APIs and system integration patterns.

Distributed System Thinking:
Ability to design systems that coordinate multiple services agents or tools within larger application ecosystems.

Containerization:
Experience with Docker.

Clean Code & Production Mindset:
Ability to write maintainable code with testing discipline and a production mindset.

Multi-Language Openness:
Willingness to collaborate in environments where other languages (such as Go) may be used.

Language Skills:
Fluent in English.

Nice to Have:

Experience with Go
Experience with: LlamaIndex; Haystack; HuggingFace Transformers; LangSmith (tracing & evaluation)
Experience working with multi-agent architectures
Familiarity with vector databases or semantic retrieval systems
Basic knowledge of Kubernetes
Experience integrating with complex enterprise platforms or engineering tools
Experience building AI-driven internal platforms or developer tools

What Makes This Role Attractive:

Work on a large-scale enterprise AI platform used in the energy industry
Build LLM-powered agent systems integrated with engineering platforms
Opportunity to work on complex integrations across multiple enterprise tools and systems
Collaborate in a multidisciplinary AI infrastructure and platform engineering team
Build production GenAI systems with real operational impact
High ownership and strong technical autonomy
Opportunity to grow into AI architecture or platform leadership roles

Our Culture: What Sets Us Apart

At Nexttech we dont rely on polished platitudes; instead we let our team members voices speak to the essence of who we are:

An organization that always listens to feedback from employees continuously improving based on input and suggestions.

A culture that encourages work-life balance and independence at work.

A place where genuine communication and respect thrive between all levels of the company.

An organization thats close to people where kindness and support are constants.

A culture that makes new members feel welcomed involved in day-to-day decisions and valued for their unique skill set from day one.

A team that promotes psychological safety and the confidence to speak your mind without fear.

Join Us and Bring Your Full Self to Work

We promise an environment where respect openness and recognition are at the core of your experience. Here youll find a collaborative and responsible team that values fun autonomy and flexibility. Youll face challenges that allow you to grow supported every step of the way by peers and leadership alike.

What We Look for in You:

If you possess strong expertise a collaborative spirit a responsible and diligent mindset resilience flexibility open-mindedness courage and an innate desire to support your teammates youll fit right in at Nexttech.

Come be part of a place where your effort is valued your ideas are heard and your growth is our priority.

Required Experience:

Senior IC

About NexttechFounded in 2015 Nexttech has built a solid foundation in delivering comprehensive IT solutions tailored to meet diverse client needs. With expertise spanning five key industry sectorsBanking Energy Telecom Automotive andE-commerce & Logisticswe provide nearshore and onshore services de...