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Senior Full-Stack Engineer

Company:
3B Staffing
Location:
Denver, CO, 80265
Posted:
April 28, 2026
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Description:

TITLE: Senior Full-Stack Engineer

LOCATION: Denver, CO or NYC (On-site)

USC and GC

Financial Services / Trading / Capital Markets experience good to have

Senior Full-Stack Engineer with 7+ years of Java (Spring Boot, REST, Microservices), SQL, React, CI/CD, Linux, DevOps, and security protocols experience;

OVERVIEW

We are seeking a talented and dedicated Senior Software Developer with a focus on low-latency, real-time back-end application development to join our high-performing team in Denver. This is a unique opportunity to work on complex systems that support high-throughput, mission-critical environments.

RESPONSIBILITIES

Design, develop, test, deploy, and maintain high-performance applications using Java (and some React)

Participate in the full software development lifecycle, including planning, design, implementation, testing, and production support.

Translate business and technical requirements into well-engineered software solutions.

Collaborate with global teams, including product managers and technical leads.

Conduct code reviews and participate in software design discussions.

Provide documentation and support for deployed systems.

EXPERIENCE REQUIRED

7+ years of experience in Java along with proficiency in Spring, Spring Boot, RESTful APIs, and Microservices architecture.

SQL and relational databases, Maven, Git, JUnit, and test-driven development.

Familiarity with CI/CD tools and practices and Linux and Bash scripting

Familiarity with Security protocols (SAML, encryption, certificates, web security best practices), JSON, web services, DevOps, and Agile methodologies.

Nice to have experience with Java frameworks such as Keycloak and OpenSearch.

Strong problem-solving and analytical abilities along with excellent communication and teamwork skills.

Attention to detail, quality-focused mindset, and adaptability in fast-paced environments.

Bachelor's degree in Computer Science, Information Systems, or related field-or equivalent work experience.

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