Senior Java Engineer

12026-02-07
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Responsibilities

  • Design, build and operate microservices and APIs that power LLM-driven features, advancing our transition to a microservice and event-driven architecture
  • Build retrieval-augmented generation (RAG) pipelines: document ingestion, preprocessing (chunking/metadata), embedding generation, vector indexing and retrieval APIs with citations/grounding
  • Adopt the DevOps mindset: you build it, you run it; CI/CD, IaC, containerization, autoscaling and safe deploys (blue/green, canary)
  • Write well-structured and documented clean code
  • Maintain required working-hours overlap (at least 5h) with the Berlin / Central Europe time zone
  • Continuously update and expand the existing product
  • Be an important part of our multinational agile software development team

Requirements

  • Relevant work experience of minimum 5 years in building high traffic web applications using Java 8 or later, Spring, Spring Boot, Hibernate, message brokers like Apache Kafka or RabbitMQ, and building CI/CD pipelines
  • Solid foundation in API design (REST), streaming interfaces (SSE/WebSockets/gRPC) and event-driven architectures
  • Experience designing and running microservices: containerization (Docker), orchestration (Kubernetes), service discovery and CI/CD pipelines
  • Deep understanding of data stores and caching: PostgreSQL/MySQL, Redis/Memcached and at least one NoSQL system (e.g., DynamoDB, MongoDB)
  • Practical experience implementing automated tests: Unit, integration and functional
  • Very good communications skills
  • Fluency in the English language 

Great to have

  • Knowledge of retrieval reranking, classifiers and lightweight model-serving patterns
  • Experience building evaluation pipelines, offline/online metrics for AI quality and A/B testing of prompts/models/tools
  • Experience with Docker, Kubernetes and Helm charts
  • Experience in building Domain Driven Design web applications and services

What we offer

  • Attractive and competitive performance-based compensation package
  • Generous year-end 13th-month bonus
  • Loyalty and annual dedication rewards
  • Full gross salary paid during probation
  • 12 annual leave days, 11 public holidays, 1 Christmas day off and 5 sick leave days
  • Flexible check-in time, 1-day remote work per week, and the freedom to work from any of our offices in Da Nang, Hue, or Ha Noi
  • Comprehensive healthcare package and annual health check-ups
  • Team-building allowance, Annual company trips, and Gathering Party every Thursday for a fun and connected workplace
  • Sports & hobby clubs with football, badminton, biking, running, chess, or music band groups
  • Continuous learning & development with exclusive technical & soft skills training, English classes, and technical clubs
  • Financial aid for marriage, newborns, and bereavement to support you through every stage of life

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