We are seeking a **Senior Full\-stack Java Engineer** to lead the design, development, and support of omni\-channel Payment and Marketplace APIs that enhance user experiences and system integrations. You will collaborate closely with cross\-functional teams and contribute to scalable, secure, and reliable enterprise solutions. Join us to drive innovation and deliver impactful applications for our clients. **Responsibilities** * Design, develop, and deliver complex features for omni\-channel Payment and Marketplace APIs * Write secure, high\-quality production code and participate in code reviews * Coordinate with onsite teams to synchronize tasks and share progress updates * Work across the full technology stack from enterprise applications to databases * Collaborate with architects, DevOps, network teams, project and product managers, QA, and technical leads * Contribute to system design focusing on architecture, security, scalability, reliability, and performance * Participate in sprint releases ensuring timely delivery with minimal slippage * Understand business domains of dotcom and retail channels quickly * Monitor, identify, isolate, and resolve technical issues proactively to prevent business impact * Ensure incident tickets are handled within service level agreements as required **Requirements** * Extensive experience (3\+ years) in planning, designing, developing, and delivering enterprise solutions * Strong proficiency in Java/J2EE, Spring Core, microservices, and Spring Boot frameworks * Solid experience in full stack development using ReactJS, Node.js, and JavaScript * Proven ability to design, build, deploy, and manage RESTful APIs using JSON and GraphQL * Hands\-on experience with cloud\-based microservices architecture, preferably on Microsoft Azure * Experience with decomposing monolithic applications into microservices * Familiarity with service mesh technologies such as Istio and client\-side load balancing with Feign * Knowledge of monitoring and alerting tools like Splunk, Nagios, Grafana, and AppDynamics * Experience with queueing, caching, and streaming technologies such as Kafka and Coherence * Proficient with SQL and NoSQL databases including MySQL and MS SQL * Strong debugging and troubleshooting skills with ability to identify and resolve performance bottlenecks * Experience with DevOps tools including GitHub, Jenkins, JMeter, ArgoCD, and Artifactory * Ability to work independently and efficiently in a fast\-paced agile environment * Bachelor’s or Master’s degree in Computer Science or related field * Excellent communication skills with English proficiency at B2 Upper\-Intermediate level **Nice to have** * Experience with Apigee API management platform * Knowledge of Node.js server\-side development * Familiarity with AI tools such as Vibe coding * Understanding of MCP servers and GitHub workflows * Experience with cloud\-native logging and monitoring in Azure environment **We offer** * Career plan and real growth opportunities * Unlimited access to LinkedIn learning solutions * Constant training, mentoring, online corporate courses, eLearning and more * English classes with a certified teacher * Support for employee’s initiatives (Algorithms club, toastmasters, agile club and more) * Enjoyable working environment (Gaming room, napping area, amenities, events, sport teams and more) * Flexible work schedule and dress code * Collaborate in a multicultural environment and share best practices from around the globe * Hired directly by EPAM \& 100% under payroll * Law benefits (IMSS, INFONAVIT, 25% vacation bonus) * Major medical expenses insurance: Life, Major medical expenses with dental \& visual coverage (for the employee and direct family members) * 13 % employee savings fund, capped to the law limit * Grocery coupons * 30 days December bonus * Employee Stock Purchase Plan * 12 vacations days * Official Mexican holidays, plus 5 extra holidays (Maundry Thursday and Friday, November 2nd, December 24th \& 31st) * Monthly non\-taxable amount for the electricity and internet bills EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi\-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting\-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential. *By applying to our role, you are agreeing that your personal data may be used as in set out in EPAM´s Privacy Notice and Policy.*