Job Title: Backend Modernization Engineer III Location: Virtual United States remote Job#: 3031737 Job Description: Pay Range: $61-$70 hr Backend Modernization Engineer III Technical Skills Must Have - Application Development - AWS</li> - Java - Spring Boot Nice To Have - Banking - Money transfer / payments Job Description Primary Responsibilities - Design application code, implement technical solutions, and configure applications across multiple environments to address business needs. - Write applications to solve analytical and operational problems. - Perform all phases of software engineering including requirements analysis, application design, development, and testing. - Design and implement product features, including reusable components, frameworks, and libraries, in collaboration with business and IT stakeholders. - Work with strategic customers to containerize applications using modern containerization methodologies. - Develop best practices for containerizing and modernizing a wide range of application platforms. - Code, test, release, and support backend services and data workflows. - Design software solutions to solve complex technical challenges. - Automate build, deployment, and testing processes for various solutions. Qualifications - Technical degree or equivalent professional experience. - Knowledge of infrastructure‑based applications such as Docker, Kubernetes, and microservices. - Strong skills in Java, Spring, and Spring Boot. - Familiarity with Backbase API is a plus. EEO Employer Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Employee Services Department at [email protected] or 844-463-6178. Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRated's Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click here for more details. Apex Benefits Overview: Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our 'Welcome Packet' as well, which an Apex team member can provide. Employee Type: Contract Remote: Yes Location: Virtual, VA, US Job Type: Date Posted: April 24, 2026 Pay Range: $62 - $70 per hour Similar Jobs - Backend Developer - Systems Operations & Modernization Engineer - Platform Engineer III - Test Engineer III - Data Engineer III

• Develop new Web applications through packaged and customized applications. • Maintain and enhance existing Web applications and all internal systems are integrated. • Play a key role in building medium to large-scale public facing, high volume based Web applications. • Maintain existing intranet, extranet, and Internet sites and applications. • Participate in the ongoing development of applications that meet the needs of our customers. • Deliver new functionality and change requests for existing applications. • Perform complete testing of Web applications, unit, and system, engaging users as necessary. • Develop database-driven Web interfaces for rapid, real-time information sharing. • Develop external Web portals allowing users to input and retrieve accurate information. • Candidate must be a team player and willing to teach and to learn.

• Own the mobile architecture blueprint—from client app layers to backend integration (APIs, microservices, event-driven patterns) • Define standards and reference architectures for React Native/Flutter/Xamarin • Establish mobile domain models, API contracts, security controls, and data governance for mobile • Create roadmaps aligned with business OKRs, balancing innovation with platform stability • Lead architecture for new mobile initiatives • Design scalable backend integrations (API gateways, GraphQL/REST, caching, pub/sub) • Implement Zero Trust principles • Align with OWASP MASVS/MSTG, NIST, ISO 27001

Role Description We’re looking for a Full Stack Software Developer with a strong backend focus to join our growing engineering team. In this role, you’ll play a key part in building scalable, high-quality software by owning backend services, APIs, and integrations—while also contributing to frontend development to deliver complete, end-to-end solutions. This is an opportunity for a developer who enjoys taking ownership of meaningful features, influencing technical direction, and mentoring others while continuing to grow their own skillset. - Design, build, and maintain scalable backend services, APIs, and data layers, with frontend contributions as needed - Own and deliver end-to-end features, from concept through deployment - Optimize application performance, including database queries, service throughput, and system efficiency - Collaborate on architecture decisions, code reviews, and technology selection - Document systems, integrations, and technical solutions - Mentor junior developers and contribute to a culture of engineering excellence - Participate in Agile development processes (standups, sprint planning, retrospectives) - Support production systems through participation in an on-call rotation Qualifications - Bachelor’s degree in Computer Science (or equivalent practical experience) - 3+ years of software development experience - Strong experience building modern full stack applications, with a primary focus on backend development - Solid understanding of distributed systems, concurrency, and scalable architecture - Hands-on experience designing and building RESTful APIs - Experience working with relational databases (schema design, query optimization, stored procedures) - Proficiency with C#/.NET, SQL Server, and Azure - Working knowledge of JavaScript/TypeScript and Angular for frontend development - Experience with Git (or similar version control systems) - Familiarity with Azure DevOps or similar tools for tracking work and defects - Experience working in Agile environments, with exposure to CI/CD pipelines and automated testing - Participation in at least one full software development lifecycle Benefits - Full Healthcare: Health, dental, vision, and more - Support & Growth: Parental Leave, Tuition Reimbursement, Volunteer Time, and more for your personal and professional development - Learning & Development: Unlimited resources via HSI's Learning Management System and career training - Remote Work: Work from anywhere that boosts your productivity - Flexible Vacations: Take needed breaks with our generous time-off policy - Retirement Security: Benefit from our $1:$1 company match for retirement savings