Fullstack L3 - Java React

Software Engineer (Fullstack) – L3 What You’ll Do Lead the design, development, and delivery of scalable fullstack solutions, owning features end-to-end across backend and frontend systems. Architect and build robust APIs using Java/GraphQL to support high-performance, data-intensive applications within advertising platforms. Design and optimize real-time data pipelines leveraging technologies such as Kafka, Aerospike, and Elasticsearch, ensuring scalability and reliability. Drive frontend architecture and development using JavaScript/React, delivering intuitive and high-quality user experiences for diverse stakeholders. Own system design decisions, ensuring performance, scalability, security, and maintainability across services. Establish and improve observability practices using tools like DataDog and Grafana, proactively identifying and resolving system issues. Translate complex business requirements into scalable technical solutions, leveraging strong domain knowledge in e-commerce and advertising systems. Collaborate cross-functionally with product managers, designers, and other engineering teams to define and deliver impactful solutions. Lead incident response, on-call rotations, and production support, ensuring system reliability during high-traffic events and critical business periods. Continuously improve engineering standards, tooling, and development processes within the team. We Are a Match Because You Have Bachelor’s degree in Computer Science, Engineering, or equivalent practical experience. 5–8 years of professional software development experience, with strong fullstack expertise. Proven experience designing and building scalable distributed systems and microservices architectures. Strong proficiency in backend development (Java, APIs, GraphQL) and frontend technologies (JavaScript, React). Hands-on experience with real-time data processing technologies such as Kafka and search/datastore systems like Elasticsearch or Aerospike. Deep understanding of database systems (SQL and NoSQL) and data modeling. Experience working with cloud platforms (GCP preferred) and modern CI/CD practices. Strong knowledge of system design, performance optimization, and software engineering best practices. Ability to take ownership, drive projects independently, and make sound technical decisions. Strong problem-solving skills, attention to detail, and a proactive mindset. What we offer: Competitive salary & benefits – Including attractive legal and above-the-law perks. Collaborative, innovative work environment. Career growth opportunities & skill development. Flexible remote work options.