Note: The job is a remote job and is open to candidates in USA. ST6 is a leading portfolio management and analytics platform helping institutional investors navigate today's complex global markets. They are seeking a Senior Agentic Software Engineer who will deliver production features and modernizations across their stack, utilizing AI-native workflows and contributing to sprint commitments.
Responsibilities
- Deliver production features and modernizations across our stack using agentic development as your primary workflow
- Work in brownfield environments, adding new functionality to existing code with the same AI-native discipline as greenfield work
- Build out and operate multi-agent workflows where distinct roles (requirements, architecture, testing, development) operate in parallel and in coordination
- Pair with existing engineers on real problems to transfer agentic working habits in practice
- Validate agent output continuously, knowing when to intervene and when to let work run based on how well requirements were established upfront
- Contribute to timely sprint delivery and consistently meet or exceed release schedule targets
- Maintain software quality by managing escaped defects and contributing to backlog reduction over time
- Produce scalable, efficient, and well-documented code
Skills
- 5 to 9 years of professional software engineering experience
- Strong fluency in Java or Python on AWS, or C# on Azure
- Production ownership history: you have shipped non-trivial systems and been accountable when things went wrong
- At least one significant out-of-depth experience, whether a stack switch, a domain change, or a greenfield build in unfamiliar territory
- 6 or more months of serious, production-grade agentic tool use (Claude Code, Cursor, or equivalent). Production work only, not pilots or experiments
- Demonstrated ability to build product with AI, not just use AI within existing workflows
- Concrete understanding of when to let an agent run versus when to intervene, grounded in how well requirements were established before the work started
- Experience reviewing and validating work you did not write, including agent-generated output
- Familiarity with building multi-agent frameworks where distinct roles operate concurrently
Company Overview
ST6 is an experienced team of executives who drive the transformation of software businesses. It was founded in 2017, and is headquartered in Austin, Texas, USA, with a workforce of 2-10 employees. Its website is http://www.st6partners.com/.