Job Title: Senior Java Software Engineer – Enterprise Customer Systems Development | Full-Time Position

Posted 2026-05-05
Remote, USA Full-time Immediate Start
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Join arenaflex as a Senior Java Software Engineer – Enterprise Customer Systems

Are you ready to be part of something extraordinary? At arenaflex, we believe that remarkable people come together to tackle their most significant challenges, creating products and experiences that once seemed impossible—things people now cannot imagine living without. If you're driven by making a genuine impact and want to join a company that values diversity, innovation, and excellence, a career with arenaflex might be the perfect opportunity for you.

We are seeking a highly skilled and motivated Senior Java Software Engineer to join our dynamic Customer Systems team. In this role, you will collaborate with cross-functional teams across the organization, working closely with business leaders and fellow engineers to design and implement innovative solutions that power our enterprise operations. This is an exciting opportunity to contribute to large-scale, high-performance systems that serve millions of customers worldwide.

Why arenaflex?

At arenaflex, we don't just make products—we create experiences that transform how people interact with technology. Our commitment to innovation, quality, and user-centric design has made us a global leader in our industry. We foster a culture of collaboration, creativity, and continuous learning, where every team member's contributions matter. When you join arenaflex, you become part of a community that values diversity, inclusion, and the relentless pursuit of excellence.

Position Overview

As a Senior Java Software Engineer on the Customer Systems team, you will play a critical role in designing, developing, and maintaining robust enterprise-level applications. You will work alongside talented engineers, product managers, and business stakeholders to deliver scalable solutions that meet evolving business needs. This position requires a unique blend of technical expertise, problem-solving abilities, and strong communication skills.

You will be responsible for building and supporting complex backend systems that handle massive volumes of data and transactions. The ideal candidate thrives in a fast-paced environment, enjoys tackling challenging technical problems, and is passionate about delivering high-quality software solutions. If you're someone who loves learning new technologies and staying ahead of industry trends, you'll find endless opportunities for growth at arenaflex.

Key Responsibilities

As a key member of our engineering team, you will:


  • Design, develop, and maintain highly available and scalable enterprise applications using Java and Java Enterprise technologies

  • Collaborate with cross-functional teams to understand business requirements and translate them into technical specifications

  • Architect and implement robust backend solutions that can handle Apple-scale volumes and performance demands

  • Develop and consume RESTful APIs and web services for web and mobile applications

  • Work with both SQL and NoSQL databases to design efficient data storage solutions

  • Implement Spring-based frameworks and leverage modern Java ecosystem tools

  • Design and build distributed systems with considerations for concurrency, scalability, and fault tolerance

  • Ensure application security by implementing best practices for secure coding and data protection

  • Conduct code reviews and provide constructive feedback to team members

  • Mentor junior engineers and contribute to their professional development

  • Participate in on-call rotations and provide support for production systems

  • Contribute to architectural decisions and technical strategy planning

  • Work effectively with project managers and business stakeholders to deliver projects on time

  • Identify and implement performance optimization strategies

  • Maintain comprehensive documentation for code, APIs, and system architecture

Required Qualifications

To succeed in this role, you should have:


  • Educational Background: Bachelor's or Master's degree in Computer Science, Information Technology, or a related field

  • Java Expertise: Strong proficiency in Java and Java Enterprise Edition (JEE) application development

  • Experience: Minimum of 2 years of experience designing and building mobile enterprise-level backend solutions

  • Framework Knowledge: Hands-on experience with Spring Framework, RESTful services, and multi-threading concepts

  • Database Skills: Solid understanding of database design, data modeling, and data access technologies including both SQL and NoSQL systems

  • API Development: Experience building, designing, and deploying highly scalable REST-based stateless APIs and web services

  • Distributed Systems: Experience architecting and developing distributed systems, concurrent programming, and data structures

  • Web Applications: Previous experience developing distributed, large-scale, low-latency web applications

  • Service-Oriented Architecture: Knowledge of Application layer architecture in SOA/Microservices environments

  • Security Awareness: Understanding of security principles and ability to build reliable, secure distributed applications

  • Performance Optimization: Strong knowledge of application performance optimization techniques and caching solutions

  • Responsive Applications: Experience with Responsive Java applications is a plus

Preferred Qualifications

While not required, the following skills and experiences would be highly valued:


  • Experience with artificial intelligence and building solutions with large-scale data infrastructure

  • Background in designing natural language processing systems for Web applications and API Platforms

  • Experience leading and mentoring other engineers and architects

  • Knowledge of cloud platforms and containerization technologies

  • Familiarity with agile methodologies and DevOps practices

  • Experience working in a large enterprise environment with global teams across different time zones

Essential Skills and Competencies

Beyond technical qualifications, we look for candidates who demonstrate:


  • Problem-Solving Abilities: Strong analytical and quantitative skills to tackle complex technical challenges

  • Communication Skills: Excellent verbal and written communication abilities, with the capacity to interact effectively with technical and non-technical stakeholders

  • Multitasking Capability: Ability to manage multiple concurrent projects and priorities effectively

  • Self-Motivation: A proactive, self-driven attitude with a passion for achieving and exceeding expectations

  • Attention to Detail: Meticulous approach to code quality and system reliability

  • Team Player: Strong collaboration skills and the ability to work harmoniously in a loosely organized, matrixed structure

  • Adaptability: Comfortable working in a dynamic, fast-paced environment with evolving requirements

Career Growth and Learning Opportunities

At arenaflex, we invest in our employees' growth and development. As a Senior Java Software Engineer, you'll have access to:


  • Comprehensive onboarding and training programs

  • Continuous learning opportunities through internal tech talks, workshops, and conferences

  • Mentorship from senior engineers and technical leaders

  • Clear career progression paths with opportunities to advance into principal engineer, architect, or leadership roles

  • Exposure to cutting-edge technologies and emerging trends in the industry

  • Cross-functional project experience that broadens your skill set

  • Access to internal knowledge repositories and technical resources

We encourage all our engineers to pursue certifications, attend industry events, and share their knowledge with the community. Your growth is our success, and we're committed to providing the resources you need to advance your career.

Work Environment and Culture

arenaflex offers a collaborative, inclusive work environment where innovation thrives. We believe in empowering our employees to do their best work by providing:


  • Flexible work arrangements that support work-life balance

  • State-of-the-art tools and development environments

  • Open, transparent communication across all levels of the organization

  • A culture of respect, diversity, and inclusion

  • Regular team-building activities and social events

  • Employee resource groups and community engagement opportunities

  • A supportive atmosphere that encourages creativity and experimentation

You'll be working with talented professionals who are passionate about technology and committed to delivering exceptional results. Our flat organizational structure ensures that your voice is heard, and your ideas can make a real impact.

Compensation and Benefits

We recognize that our people are our greatest asset, and we offer competitive compensation packages that reflect this belief. The expected hourly rate for this position is $20-30 per hour, commensurate with experience and qualifications.

In addition to competitive pay, arenaflex offers a comprehensive benefits package including:


  • Health, dental, and vision insurance

  • 401(k) retirement plan with company matching

  • Paid time off and holidays

  • Parental leave and family support programs

  • Professional development reimbursement

  • Employee assistance programs

  • Wellness programs and gym discounts

  • Stock options or equity participation (for eligible employees)

How to Apply

If you're excited about the opportunity to work with cutting-edge technology, solve complex problems, and make a meaningful impact, we encourage you to apply for this position. We're looking for passionate individuals who want to be part of something special.

At arenaflex, we believe diverse perspectives drive innovation. We welcome applicants from all backgrounds and are committed to creating an inclusive workplace where everyone can thrive. Join us and help shape the future of technology.

Take the next step in your career—apply today and become part of the arenaflex team!

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