Backend Java Developer —- Locals Only —- W2 Role —- Hybrid role

Zillion Technologies Inc.; Vienna (VA); Hybrid; USD 103,000 - 117,000; Full time

Job summary

Zillion Technologies Inc. is seeking a mid-to-senior Backend Java Developer for a long-term hybrid role in San Diego, CA. You will design, develop, test, and maintain backend services and APIs that support mobile, web, and partner systems.

You will collaborate with analysts, QA, and frontend engineers to deliver secure, scalable, and reliable solutions. The ideal candidate will have strong Java 17+, Spring/Spring Boot experience, cloud familiarity (Azure preferred), and a track record of

Qualifications

• Strong Java experience with Java 17 or newer.
• Solid knowledge of enterprise Java, Spring, Spring Boot, web services, and RESTful APIs.
• Experience with automated testing frameworks (JUnit, Mockito).
• Proficiency with Git and CI/CD tools (Maven, Docker, Jenkins, GitHub, Azure DevOps).
• Strong understanding of databases, SQL, and data integration patterns.
• Experience troubleshooting distributed systems and designing scalable microservices.
• Experience developing cloud-native apps, Azure preferred.

Responsibilities

• Design, build, and maintain secure backend services and APIs for mobile, web, and partner systems.
• Design for performance, reliability, resiliency, observability, quality, and responsiveness.
• Collaborate with cross-functional teams to deliver sustainable technical solutions.
• Develop and maintain unit, integration, and automated tests for reliable delivery.
• Apply secure coding, data protection, and engineering standards.
• Troubleshoot production defects and performance bottlenecks in complex service dependencies.
• Refactor code and conduct peer reviews to improve security and maintainability.
• Contribute to solution design, documentation, and architectural decisions.
• Support services across testing, deployment, and production operations.
• Participate in Agile ceremonies and advocate for automation and continuous improvement.
• Share knowledge and mentor less experienced engineers.

Skills

Java

Spring Framework

Spring Boot

RESTful APIs

JUnit

Mockito

Git

CI/CD Tools

SQL Databases

Azure Cloud

Microservices

Tools

Maven

Docker

Jenkins

GitHub

Azure DevOps

Job description

Backend Java Developer

Duration: Long Term Ongoing with no end date

Hybrid role – Thrice a week onsite and Two days remote —- San Diego, CA

Compensation : $75/hr to $85/hr

Role Overview

We are seeking a mid-to-senior Backend Engineer to design, develop, test, integrate, and maintain backend

services and digital systems supporting mobile and online banking platforms. This role partners closely with

analysts, QA testers, frontend engineers, and cross-functional teams to deliver secure, scalable, reliable, and

high-quality solutions.

This candidate works independently on complex initiatives with minimal supervision and provides technical

guidance to less experienced engineers. This role requires strong engineering judgment, professionalism,

effective collaboration, and a focus on secure, scalable, resilient, and maintainable solutions.

Key Responsibilities

• Design, build, integrate, and maintain secure backend services and APIs supporting mobile, web, enterprise, and partner systems.
• Design for performance, reliability, resiliency, observability, quality, and responsiveness.
• Collaborate with cross-functional teams to define, design, and deliver sustainable technical solutions.
• Develop and maintain unit, integration, and automated tests to support reliable delivery.
• Apply secure coding, data protection, and engineering standards.
• Troubleshoot production defects, performance bottlenecks, integration issues, and complex service dependencies.
• Refactor code and conduct peer reviews to improve security, quality, readability, and maintainability.
• Contribute to solution design, technical documentation, and proof-of-concepts that support architectural decisions.
• Support services across testing, deployment, production troubleshooting, and continuous operational improvement.
• Participate in Agile ceremonies and advocate for adaptive planning, automation, reusable solutions, and continuous improvement.
• Share knowledge and support the development of less experienced engineers.

Required Qualifications and Skills

• Strong Java experience, with Java 17 or newer preferred.
• Solid knowledge of enterprise Java, Spring, Spring Boot, web services, and RESTful APIs.
• Experience with automated testing frameworks and practices, such as JUnit and Mockito.
• Proficiency with Git and CI/CD tools such as Maven, Docker, Jenkins, GitHub, or Azure DevOps.
• Strong understanding of databases, SQL, and data integration patterns.
• Experience troubleshooting distributed systems and designing scalable, resilient, observable microservices.
• Experience developing cloud-native applications, with Microsoft Azure strongly preferred.
• Effective communication, independent prioritization, and collaboration skills, including the ability to explain technical concepts to non-technical audiences.

Desired Qualifications

• Knowledge of banking or financial services industry standards and practices.
• Experience working in Agile environments and cross-functional teams.
• Familiarity with event-driven architectures and messaging technologies, such as Kafka.
• Backend Engineer | Digital Engineering
• Exposure to data engineering concepts, data management, data migration, high-volume data integrations, and performance optimization.
• Strong analytical, problem-solving, and system design skills.
• Ability to efficiently and responsibly use AI-assisted development tools to improve productivity and code quality.
• Awareness of sustainable coding practices and efficient system design.

We are an equal opportunity employer. We do not discriminate on the basis of race, color, religion, sex, national origin, age, disability, genetic information, veteran status, sexual orientation, gender identity, or any other characteristic protected by applicable federal, state, or local law.