Sr. Application Developer

Job#: 3031215Job Description:We’re supporting a large, complex enterprise environment undergoing continued application modernization and cloud adoption. This role is designed for a senior‑level engineer who enjoys working across full‑stack systems, cloud infrastructure, and enterprise‑scale applications where stability, security, and performance are critical.This is a hands‑on role where you’ll contribute directly to production systems and collaborate closely with both technical and business stakeholders.What You’ll Work OnYou’ll help design, enhance, and support highly complex applications used in a mission‑critical setting. Responsibilities include building new features, improving performance, supporting cloud‑based deployments, and resolving production issues as they arise.Work spans backend services, APIs, databases, and modern web UI components. You’ll also contribute to documentation, testing, and ongoing improvements to development standards and practices.Core Technical Requirements5+ years building full‑stack applications using Java (Spring/Hibernate) alongside modern front‑end or server‑side technologies such as Angular, TypeScript, and/or Node.js, with strong experience designing RESTful APIs.Strong hands‑on experience delivering solutions on AWS, working across a broad range of services spanning compute, storage, networking, security, messaging, monitoring, and serverless, supporting scalable, production‑grade systems.Extensive experience with relational databases, including Oracle and PostgreSQL, with hands‑on PL/SQL development and performance tuning.Solid understanding of DevSecOps and modern delivery practices, including CI/CD pipelines, Infrastructure as Code (Terraform), and containerized deployments using Docker and Kubernetes, within agile development environments.Strong foundation in software design patterns and engineering best practices, with exposure to AI/ML concepts a plus; AWS certifications (Cloud Practitioner or Developer) preferred.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.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.Apex Systems is part of the Commercial Segment of ASGN Incorporated.NYSE: ASGN4400 Cox RoadSuite 200Glen Allen, Virginia 23060Apex 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 Benefits Department at [email protected] or 804-523-8228. (Do not submit resumes or solicit consultants to this email address). UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Apex Systems.