Role: Senior Full Stack Engineer (Java / ReactJS)Sector: bankingLocation: 6x/month in the office in Warsaw or KrakowType of contract: B2BDuration: Long-term cooperationType of contract: B2BSenior Full Stack EngineerIn Corporate and Institutional Banking Client Services, we are building in-house solutions to support the onboarding and KYC activities of our customers. Among other things, we are developing client-facing applications for users to manage their activities with the Bank and orchestration capabilities to reduce the time required for clients and staff to complete these activities.Main Responsibilities:70% backend technologies, 30% frontend technologiesBe hands-on, delivering code to production, supporting the architecture and design of the system aligned to a microservice structure.Drive the delivery of code at a faster cadence across the wider team, leading by example with volume and reliability of changes.Engage actively with the business and engineering leadership to fully understand requirements.Bring innovative ideas and solutions based on understanding the wider requirements.Lead and drive the engineering culture expected across our teams.Collaborate with a global team across regional boundaries.Proactively remove impediments and communicate issues to program management.Identify process inefficiencies and implement innovative and programmatic solutions.Key Requirements:Extensive experience in software engineering (at least 5 years of relevant experience) with proven expertise in designing, developing, and deploying backend applications.Strong experience developing UI applications using ReactJS.Strong experience with Java, preferably with recent versions.Experience designing microservice architecture.Experience leading teams to deliver changes to production at a high cadence.Good CI/CD practice and development experience.Experience designing and delivering RESTful APIs to production.Extensive experience working with PostgreSQL databases.Nice to Have:Understanding of containers and Container Orchestration technology (Docker/Kubernetes and GCP).Experience migrating databases from one stack to another e.g. MongoSQL to PostgreSQL.Experience working in the financial sector, specifically banking, previously.