Alexey Chentsov

Real-time Voice AI & Chatbot Platform Architecture; designed multilingual STT → LLM → TTS pipeline; integrated OpenAI/Anthropic for voice & chat channels; led cross-functional team (5 engineers); delivered resilient enterprise systems; frontend: React.js; backend: Node.js; architecture: microservices; technologies include Nest.js, Vue.js, OpenAI, Anthropic, Postgres, Vector DB, VoIP/WebRTC, Twilio, Docker, CI/CD, Fly.io.

Senior Java Developer – Contract at ING Deutschland

Integration of newly acquired system into ING Deutschland's Corporate Banking Platform; SOA with asynchronous messaging via Kafka; end-to-end feature ownership; front-end and back-end modernization using Java/Spring; release management and post-production support.

Redesigned energy networks monitoring (IoT, EV, PV); telemetry throughput increased ~50%; reduced maintenance costs ~50%; introduced Kafka-based telemetry; improved reliability with real-time analytics; Azure DevOps pipelines; Terraform/Helm environment rationalization; mentored 5–7 engineers.

Senior Java Developer – Contract at A GmbH

Security Systems Edge Applications: built an IoT edge e-commerce platform for security cameras (apps running on the edge); migrated CI from Jenkins to GitLab; designed AWS/Kubernetes/Terraform landscape; technologies: Java, Spring, PostgreSQL.

Online Temporary Workforce Management System: modernized frontend from JSF to Vue.js SPA; improved UX and performance (~40% faster loads); led a team of 3–4 external freelancers; delivered critical components on schedule; managed GitHub CI pipelines and AWS infrastructure; automated deployments and scaling.

Lead Developer at Major Investment Bank

Risk Management System: processed XML files (GB-scale) in parallel; led 5 Oracle developers; improved development lifecycle and code quality (~30% defect reduction); implemented frontend (PrimeFaces/JQuery) and backend logic using Java/Spring for massive data transfers; technologies: Java, Spring, PrimeFaces, JQuery, Oracle DB, PL/SQL, MyBatis; established CI/CD; leveraged Jira.