We’re hiring a Principal Full-Stack Engineer to join one of the largest banking institutions in the U.S. – a highly complex, high-impact environment where engineering decisions truly matter.
This role is ideal for someone who combines deep backend expertise in Java with strong frontend capabilities in React, and hands-on experience working with LLMs (Claude preferred).
What you’ll be doing:
- Lead the design and development of scalable backend services in Java (Spring Boot)
- Build and optimize secure, high-performance APIs
- Contribute to and guide React-based frontend architecture
- Work hands-on with LLM/AI technologies (Claude or similar), integrating them into real-world applications
- Drive best practices across code quality, architecture, and performance
- Mentor engineers and support UI developers in delivering high-quality solutions
- Partner with stakeholders to translate business needs into technical execution
- Contribute to system design discussions, code reviews, and continuous improvement
What we’re looking for:
- Strong experience in Java backend development and server-side architecture
- Solid React experience on the frontend
- Hands-on experience with LLMs / AI tools and practical implementation
- Experience designing and building scalable, distributed systems
- Strong understanding of APIs, databases, and performance optimization
- Proven ability to lead technically and mentor others
Nice to have:
- Experience with GraphDB, Scala, or complex data processing systems
- Exposure to cloud platforms (AWS, Azure, or GCP)
- Familiarity with CI/CD pipelines and DevOps practices
Why join us?
At RE Partners, we partner with industry leaders to deliver high-impact technology solutions. We’re not a traditional staffing agency – we operate as a true consulting partner, helping organizations navigate complex digital transformations. Our global team, diverse culture, and strong delivery model have made us a trusted partner to Fortune 1000 companies.
If you’re excited about building at scale, working with cutting-edge AI, and operating at a principal level – let’s connect.
”, “datePosted”: “2026-05-02”, “hiringOrganization”: { “@type”: “Organization”, “name”: “RE Partners”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__421045655__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “” } } }We’re hiring a Principal Full-Stack Engineer to join one of the largest banking institutions in the U.S. – a highly complex, high-impact environment where engineering decisions truly matter.
This role is ideal for someone who combines deep backend expertise in Java with strong frontend capabilities in React, and hands-on experience working with LLMs (Claude preferred).
What you’ll be doing:
- Lead the design and development of scalable backend services in Java (Spring Boot)
- Build and optimize secure, high-performance APIs
- Contribute to and guide React-based frontend architecture
- Work hands-on with LLM/AI technologies (Claude or similar), integrating them into real-world applications
- Drive best practices across code quality, architecture, and performance
- Mentor engineers and support UI developers in delivering high-quality solutions
- Partner with stakeholders to translate business needs into technical execution
- Contribute to system design discussions, code reviews, and continuous improvement
What we’re looking for:
- Strong experience in Java backend development and server-side architecture
- Solid React experience on the frontend
- Hands-on experience with LLMs / AI tools and practical implementation
- Experience designing and building scalable, distributed systems
- Strong understanding of APIs, databases, and performance optimization
- Proven ability to lead technically and mentor others
Nice to have:
- Experience with GraphDB, Scala, or complex data processing systems
- Exposure to cloud platforms (AWS, Azure, or GCP)
- Familiarity with CI/CD pipelines and DevOps practices
Why join us?
At RE Partners, we partner with industry leaders to deliver high-impact technology solutions. We’re not a traditional staffing agency – we operate as a true consulting partner, helping organizations navigate complex digital transformations. Our global team, diverse culture, and strong delivery model have made us a trusted partner to Fortune 1000 companies.
If you’re excited about building at scale, working with cutting-edge AI, and operating at a principal level – let’s connect.
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