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# Senior Software Engineer

- **Company:** The Harper Group Inc
- **Location:** United States (Remote available)
- **Experience:** Expert
- **Salary:** $150,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Amazon Web Services, User Authentication, Software as a Service, Code Review, Continuous Integration, Software Debugging, Distributed Systems, PostgreSQL, Open Web Application Security, Performance Tuning, Secure Coding, Software Engineering, Large Language Models, Multi-Agent Systems, Backend, Production Code, Code Restructuring
- **Published:** September 27, 2026
- **Apply:** https://arc.dev/remote-jobs/j/redirect/pmw0mpwxfo

## About the Role

* 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

## Description

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., * 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


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