Senior Software Engineer

Senior Software Engineer (Java, AI-Augmented Development)
You'll ship production Java at scale using AI coding agents as a core part of how you work, not a bolt-on. This is a senior individual contributor role for someone who has spent the last couple of years building real systems with LLM tools and multi-agent workflows, and who still writes and reviews code to a high standard.
Senior Software Engineer - The essentials
Salary: up to 150,000USD/annum + benefits (medical cover, performance bonuses, 401(k))
Location: US, remote - open to travel (once a quarter)
Senior individual contributor, embedded in an engineering team
LT Harper is handling this search on behalf of our client
Senior Software Engineer -What you'll actually do
Design, build and maintain production backend and distributed systems in Java and Spring, owning complex features from implementation through to deployment
Use LLM-based coding tools and agent workflows daily to write, refactor, test and debug code, and keep evolving how you work as the tooling changes
Work with MCP-style multi-agent systems to generate and iterate on production code, automate test creation, support root-cause analysis and speed up code review
Debug and resolve issues in large-scale production environments, and fix performance, reliability and scalability problems in existing systems
Improve testing practices, CI/CD workflows and developer efficiency across the team
Give clear technical feedback in code reviews and work iteratively with engineers and product teams
Senior Software Engineer - What you'll need
Essential:
10+ years of hands-on software engineering building and maintaining production systems at scale (client requirement)
Expert-level Java and advanced Spring
2+ years of daily, hands-on use of AI coding assistants and multi-step agent workflows (MCP-style or equivalent) for development, debugging and refactoring
Strong backend, API, distributed systems and system design experience, with production AWS
Strong PostgreSQL, including data modelling, performance tuning and querying
Solid grounding in secure coding, OWASP principles, authentication and authorisation, and data protection in distributed systems
Nice to have:
Experience in fintech, payments, trading or other regulated financial systems
Experience with developer productivity tooling or internal engineering platforms
Exposure to high-scale SaaS or distributed enterprise systems
Experimenting with or training autonomous coding agents
What's in it for you
You'll work in a team where AI-native development is the expected way of working, with the scope to shape your own workflows and the team's tooling.
Apply
If you're interested, apply directly on this advert. If you have any questions, or would like to refer someone, reach out to Adam Sawa at a.sawa@ltharper.com. If you need any adjustments during the application process, tell us and we'll make them.

Work arrangement
No