Agentic Developer, LLM‑Native / Enterprise, NY

About the role

Lab49 is looking for a Senior Agentic Developer—an engineer who doesn’t just use AI tools but writes software through them. This is not a role focused on “adding AI features” or “building AI platforms.” Instead, we are seeking an experienced developer who generates production-grade enterprise code using large language models as a primary interface, particularly while modernizing or extending complex, legacy systems in highly regulated environments. You will operate as a vibe coder in the best sense of the term: combining deep engineering intuition, strong system design instincts, and fluent command of LLMs to move faster than traditional development workflows—without compromising rigor, compliance, or reliability.

Responsibilities

• Generate, refactor, and extend enterprise-grade codebases by orchestrating LLMs as first-class development tools, not just assistants
• Modernize and evolve legacy systems (often written in traditional enterprise stacks) using AI-driven development workflows
• Apply “vibe coding” practices responsibly within highly regulated domains such as financial services, capital markets, or other compliance-heavy environments
• Design and guide agentic workflows where LLMs reason, iterate, and produce code aligned with business and architectural constraints
• Validate, test, and harden AI-generated code to meet production, security, and audit standards
• Collaborate closely with product managers, architects, and clients to translate ambiguous requirements into working systems—fast
• Influence how Lab49 and its clients adopt LLM-native software engineering practices at scale

Requirements

• Strong software engineering background with experience in enterprise or legacy systems
• Hands-on experience manufacturing production-grade software in an AI-assisted way at scale (not just autocomplete or chat usage, but sustained code production through prompts, agents, or workflows)
• Experience working within mature CI/CD environments, with automated testing fully integrated into the delivery pipeline
• Comfort working in regulated, risk-aware environments, where correctness, explainability, and traceability matter
• Ability to reason about system behavior, edge cases, and failure modes—even when the code is AI-generated
• Fluency in at least one major enterprise language or ecosystem (e.g., Java, C#, Python, JVM-based stacks, etc.)
• Strong intuition for when to trust the model—and when not to
• Ability to lead teams through the AI adoption journey and help enterprises build scalable, robust AI software factory frameworks

Nice to Have

• Experience designing or using agentic development workflows (multi-step prompting, tool-using agents, code-generation loops)
• Exposure to modernization programs (monolith → services, legacy refactors, platform rewrites)
• Opinions about how software engineering should evolve in an LLM-first world—and the ability to defend them

About Lab49

Lab49 is a specialist strategy, design, and technology consulting company dedicated to the financial services industry. Founded in 2002, we fill a need in the Financial Technology marketplace for high-end execution and reliable delivery of technology projects. Our consultants are experts in strategy, user experience, architecture, engineering, and delivery management. We combine knowledge of the latest trends in technology with deep domain expertise to deliver innovative solutions with accelerated time-to-market. We have office hubs in Midtown Manhattan, Washington DC, London, Budapest, New Delhi, and Sydney.