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Senior Java Backend Lead - Spring Boot & Microservices

Posted today

quantum technologies usaAustin (TX)

SENIORITY

Manager

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About the role

Quantum Technologies LLC seeks a Lead Java Backend Developer (Contractor) in New York. The role focuses on hands-on technical leadership, building scalable microservices with Spring Boot and ensuring high performance for applications processing millions of transactions daily. Required are 12–16 years of Java backend experience, expertise in Spring Boot, RESTful APIs, JUnit, and CI/CD. Strong problem-solving and leadership skills are essential.

Before you apply

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Your profile is current

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Two examples you can talk through

Not a portfolio — just two pieces of work where you can explain the decisions and what you'd change.

A number in mind

What you're on now and what would make you move. We negotiate better when we know both.

Your notice period

Employers plan around it, and it's the question that stalls offers most often.

Once you apply, someone reads it and calls you before anything reaches the employer — usually within two working days.

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