Lead Java UI Engineer

Responsibilities:

Role Overview

hands-on Lead Software Engineer (Java & UI)

Key Responsibilities

• Full‑Stack Architecture:

  Define clean boundaries between Java microservices (API‑first) and React/TypeScript/Next.js front‑ends, standardize API contracts and BFF patterns (Java-first).

• Build & Delivery:

  Implement domain services and REST APIs in Java, contribute to critical UI workflows and component libraries when needed.

• Quality & Testing:

  Apply test pyramids across tiers—

  JUnit/Mockito/Testcontainers

  (BE),

  Jest/RTL/Playwright

  (FE), enforce API/UI contract tests.

• Performance & Security:

  JVM/DB tuning, caching, resilience, optimize

  Core Web Vitals

  and SSR/SSG/ISR, apply

  OAuth2/JWT

  , CSP.

• Observability:

  Logs/metrics/traces across BE & FE and error tracking, dashboards and alerting for release health.

• Mentorship & Collaboration:

  Mentor engineers, promote reuse (shared libs/components), communicate risks/trade-offs and align on scope with Product/UX/Architecture.

• Facilitate agile ceremonies

  : (stand‑ups, backlog refinement, sprint planning, demos, retros) with a focus on technical outcomes, risk surfacing, and sprint goal clarity.

• Refine stories into actionable technical tasks

  : ensure

  Definition of Ready/Done

  , unambiguous acceptance criteria, testability, and accurate

  story point estimation

  .

Qualifications:

Must‑Have Skills

Java (Primary)

• Java / Java 8+:

  OOP &

  SOLID

  ,

  Streams

  ,

  Optional

  ,

  functional interfaces

  ,

  lambda expressions

  .

• Concurrency:

  Thread pools,

  Future/CompletableFuture

  , synchronization, locks,

  concurrent collections

  ,

  Java Memory Model

  , heap/stack,

  GC

  .

• Web & API:

  RESTful design,

  rate limiting

  ,

  API gateway

  concepts,

  Swagger/OpenAPI

  documentation,

  WebLogic/WebSphere

  familiarity (or embedded servers).

• Spring:Spring Core (IoC/DI)

  ,

  Spring MVC

  ,

  Spring Boot

  ,

  Spring Security

  (JWT/OAuth2),

  Spring Batch

  ,

  Spring AOP

  .

• Architecture & Patterns:Event‑driven design

  (MQ/queuing), patterns—

  Factory, Builder, Strategy, Template

  .

• Data/Testing/Tooling:

  SQL & query tuning, Redis, JUnit/Mockito/Testcontainers, Maven/Gradle, Git, CI/CD, OpenTelemetry.

UI (Secondary – 20–30%)

• React + TypeScript + Next.js:

  Component-driven development, hooks, state (Redux/RTK/Zustand),

  SSR/SSG/ISR

  , routing, image optimization.

• Performance & Accessibility:Core Web Vitals

  , code splitting, caching/CDN,

  WCAG 2.1

  accessibility practices.

• Security & Testing:

  CSP, sanitization, XSS/CSRF protections,

  Jest

  ,

  RTL

  ,

  Playwright/Cypress

  .

• Integration:

  Robust consumption of Java APIs, auth flows (OAuth/OIDC, JWT), error handling and retry UX.

Good to Have

• Design systems (Storybook, tokens/theming), monorepos (Nx/Turborepo).
• Messaging/eventing (Kafka), BFF-in-Java standards, API versioning strategies.
• Containers (Docker) and orchestration basics (Kubernetes/ECS).

Soft Skills

• Strong problem-solving, analytical thinking, and

  bias for action

  .

• Plans, prioritizes, and communicates

  effectively across teams and time zones.

• Mentors

  teammates, provides clear, constructive feedback.
• Demonstrates

  ownership

  , raises the bar, and

  consistently exceeds

  day-to-day expectations.

clarity and resolution