Senior Agentic Engineer

Luxoft; España; On-site; EUR 70,000 - 100,000; Full time

Job summary

Luxoft is seeking a Senior Agentic Engineer to drive modernization projects, deploying and refining prompt-driven tooling. You will own features end-to-end, from problem framing to production, collaborating with cross-functional teams to deliver robust AI/agentic solutions.

The role emphasizes rapid iteration, strong testing discipline, and clear communication of decisions and limits. Candidates with deep LLM experience and production-grade storytelling will excel in this fast-paced environment.

Qualifications

• Minimum 5+ years of professional software development.
• Experience in full stack development with production systems.
• Strong SQL skills and graph data models (Neo4j) and vector databases.
• Proficient with Docker, Kubernetes and Helm, deploying and debugging.
• Testing required: unit and integration tests; Testcontainers or similar.
• TDD mindset; owning an area from problem to production.
• Ability to learn quickly in unfamiliar code/ domains.
• Ability to explain decisions and limits in writing and speaking.
• Experience with modernization/agentic tooling is a plus.

Responsibilities

• Launch modernization toolset.
• Customize and adjust prompts.
• Troubleshoot, debug, and resolve prompt issues.
• Collaborate with modernization team members to align with project goals and deliver high-quality solutions.

Skills

Full stack

5+ yrs exp

Relational SQL

Neo4j graphs

Vector DBs

Docker

Kubernetes

Helm

Unit tests

TDD

Owns domain

Decision making

Fast learner

Clear comms

LLM experience

Output review

Explain decisions

LLM APIs

Tools

LLM APIs

Job description

We are looking for a Senior Agentic Engineer who will be able to work with different modernization projects.

Responsibilities

• Launch modernization toolset.
• Customize and adjust prompts.
• Troubleshoot, debug, and resolve prompt issues.
• Collaborate with modernization team members to align with project goals and deliver high-quality solutions.

Skills

Must have

• Daily work with coding agents (Claude Code, Cursor, Codex or similar) as your main way of writing code, not an experiment.
• Understanding of how LLM agents work: context, tools, planning, subagents, typical failure modes.
• Ability to review agent output quickly and critically, catching errors and hallucinations.
• 5+ years of professional software development as a full stack developer, with systems taken to production and supported there.
• Relational databases and SQL; understanding of graph data models (Neo4j) and vector databases.
• Docker, Kubernetes, Helm: you deploy and debug them yourself.
• Testing as a habit: unit and integration tests, Test containers or similar.
• Understanding of TDD aspects.
• Owning an area on your own, from an unclear problem statement to production, without someone else breaking it into tasks.
• Willingness to make decisions with incomplete information and to own the outcome.
• Ability to get up to speed quickly in unfamiliar code, technology or business domains.
• Ability to explain a decision and its limits in writing and in person.

Nice to have

• Experience with LLM provider APIs (Anthropic, OpenAI, Bedrock) or a gateway such as LiteLLM.
• R&D experience: hypotheses, prototypes, experiments and data-driven decisions on problems with no known answer.
• Mainframe: COBOL, CICS, JCL, DB2, IMS, PL/I, HLASM, CA Gen, z/TPF; 3270 and z/OSMF.
• Experience building evals for non-deterministic systems: regression suites, metrics, comparison of models and prompts.
• Knowledge of threats to agents and the code they write: prompt injection, secret leakage, excessive permissions, poisoned dependencies and MCP servers (OWASP Top 10 for Agentic Applications).