Tech Lead (Java) • Head of Development
High-load architecture • Microservices • Event-driven systems • SRE/DevOps

• 9+ years building software, 6+ years leading cross‑functional teams (backend, frontend, mobile, QA, DevOps).
• I design, build, and scale transactional microservice platforms (fintech, communications, healthcare, retail) with strong focus on reliability, performance, and security.
• Hands‑on leader: architecture, delivery, CI/CD, observability, incident response, hiring, and mentoring.
• Practices: TDD/BDD, DDD, Clean/Hexagonal Architecture, CQRS, Event‑Driven Architecture; solid DevOps/SRE mindset.

• Cut P95/P99 transaction latency by ~30% and increased daily throughput via data/model and infra tuning.
• Accelerated release cadence by ~25% through CI/CD optimization, test strategy, and trunk‑based practices.
• Reduced performance‑related incidents by ~40% leveraging SLOs, telemetry, and proactive capacity planning.
• Delivered resilient e‑wallet/virtual card prototypes; built E2E testing strategy incl. service and mobile layers.

• Target architecture and roadmaps for high‑throughput microservices.
• Reliability, scalability, and performance engineering (APM, profiling, SLI/SLO, capacity, chaos-ready).
• Secure platform design: authz/authn, secrets, least privilege, audit, and compliance‑ready processes.
• Engineering culture: code review, quality gates, CI/CD, metrics, hiring and coaching.

• Databases: PostgreSQL, Oracle, MySQL, H2, MongoDB, Firebase, Redis, Memcached
• Java stack: Spring Boot, Spring Data/JPA, Spring Cloud, Spring Security, Hibernate, CXF
• Messaging: Kafka, RabbitMQ
• DevOps/CI/CD: Docker, Kubernetes, GitLab CI, Jenkins, Terraform, Prometheus, Grafana, ELK
• Frontend/Mobile: Vue, Nuxt, Flutter, Dart, JavaScript, HTML, CSS
• Approaches: Microservices, Event‑Driven, CQRS, Clean/Hexagonal, TDD/BDD, Agile (Scrum, Kanban, SAFe/LeSS/Nexus)

• High‑throughput payments and ledgers: idempotency, consistency, retry/compensation, outbox, partitioning, rate limits.
• Messaging/Realtime: chat/calls/events, delivery guarantees, backpressure, and elastic fan‑out.
• Public sector/retail logistics: integrations, data quality, E2E testing (incl. Android emulation for backend flows).

NDA‑friendly: details and names omitted; I publish generic templates and patterns instead.

• Work‑in‑progress: reference microservice template (Hexagonal, Spring Boot, Kafka/RabbitMQ, Testcontainers, Observability).
• Flutter sample apps with Clean Architecture and integration testing.
• Infra snippets: CI/CD pipelines, Terraform modules, Kubernetes manifests.

• Telegram: @WBLord