RESTful API dsgn & implmnttn (incl scre API prctcs: OAuth2 / JWT); Mcrsrvce app archtctre; Relational dbs & db prgrmmng (Oracle / PL/SQL) plus ORM (JPA / Hibernate) or Spring Data Repositories; Web app dvlpmnt (HTML5, CSS3, respnsive UI); Agile sftwre mngmnt (JIRA); Atomated tsting (JUnit, Mockito, Jest, Cypress); Cntinuous Intgrtion (Jenkins or comparable CI sys); Secure cding practces (input validation, OWASP Top 10 awareness); Git, GitHub, Bitbucket; Build & dependency mngmnt tools (Maven for Java, NPM for JavaScript); Mtning WCAG 2.1 AA stndrds & reslvng issues usng Deque axe DevTools, applying semantic HTML, proper ARIA roles, keyboard navgatn spprt, color contrast imprvmnts, & screen reader tsting. 2 yrs of exp must incl: Java/JEE Prog; Sprng Frmwrks (Core, MVC, Data) & Sprng Boot; JavaScrpt & JavaScript frmewrks: React or Angular; Node.js backnd dvlpmnt (Express.js);