Java Backend 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 to design, build, test, and maintain backend services for digital banking platforms.

You will partner with analysts, QA, frontend engineers, and cross-functional teams to deliver secure, scalable, and reliable solutions. This role requires strong engineering judgment, independent work, and the ability to guide less experienced engineers while focusing on secure, scalable, and maintainable systems.

Qualifications

• Proficiency in Java 17+ and backend design
• Strong experience with Spring/Spring Boot and RESTful APIs
• Experience with automated tests (JUnit/Mockito)
• Cloud experience, Azure preferred
• Excellent communication and collaboration skills

Responsibilities

• Design, build, and maintain secure backend services and APIs
• Focus on performance, reliability, observability, and security
• Collaborate with analysts, QA, frontend engineers, and cross-functional teams
• Develop unit, integration, and automated tests
• Participate in Agile ceremonies and support infra improvements
• Provide guidance to less experienced engineers

Skills

Java

Spring

REST APIs

CI/CD

Communication

Tools

Maven

Docker

Jenkins

Git

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 —- Vienna, VA

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.”