寻找兼职机会（中文） / 仅中文内容
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简短自我介绍
我是一名资深后端开发工程师，拥有多年 Java 后端与大数据相关开发经验，熟悉完整的软件开发生命周期（需求 → 设计 → 实现 → 发布 → 运维）。擅长数据库性能优化（SQL 调优、索引与分区）、微服务与分布式系统、容器化与 CI/CD，以及基础的安全评估与加固工作。能以中文、英文和日文开展技术沟通与文档编写，适合跨境、多语言团队协作。
技能与技术栈（要点）
- 核心语言/框架：Java（Spring Boot / Spring MVC）、MyBatis / Hibernate（JPA）
- 数据库：Oracle（OCP）、PostgreSQL、MySQL — SQL 优化、索引设计、分区策略
- 大数据与消息：Hadoop 概念、Spark（批处理）、Kafka
- 基础设施：Docker、Kubernetes（基础）、Git、Maven/Gradle、Tomcat
- 缓存/检索：Redis、Elasticsearch
- 可观测性：ELK（Elasticsearch/Logstash/Kibana）、Prometheus + Grafana
- 安全：OSCP、OWASP Top10 意识、Burp Suite（基础）与安全编码审查
- 语言能力：中文（母语）、日文（N2）
工作职责与常见贡献（示例，不含客户敏感信息）
- 担任技术负责人 / 后端主导：将业务需求转化为 API 与服务设计，主导实现、代码评审与发布交付。
- 性能与可靠性：通过 SQL 重写、索引调整、JVM 分析与缓存策略降低延迟并提升吞吐。
- 数据处理：设计并维护 ETL / 批处理流水线，优化大报表查询与批处理窗口。
- 可观测性与运维：搭建日志/监控体系，编写 runbook，参与事件响应与问题定位。
- 多语言支持：实现编码安全存储、区域化日期/数字处理、翻译 key 与回退逻辑，支持中/英/日用户。
- 团队与流程：制定代码/SQL review 清单、推动 CI/CD 自动化、指导初级工程师。
证书
- OSEP — Offensive Security Experienced Penetration Tester (2025)
- OSCP — Offensive Security Certified Professional（2021）
- OCP — Oracle Database 11g Administrator Certified Professional（2017）
可用性与期望
- 类型：兼职 / 合同（优先远程，可根据需要商议混合或短期出差）
- 时区：居住在东京（UTC+9），可配合亚太与欧美部分交叠时段会议
- 工作量：可接受每周若干小时到固定天数，具体视项目与预算而定
- 计费：可按小时或按里程碑计费（初次沟通建议确认可用时段与预算）
联系方式
为保护隐私，README 中不展示直接个人联系方式。请通过 Upwork 站内消息联系或使用页面上的“Request contact”按钮申请安全联系方式与完整简历 PDF。
Seeking Part‑time Opportunities (English) / English only
This repository showcases a public, privacy‑safe resume and capability summary. Personal identifiers (name, phone number, client/project details) are intentionally omitted. Please contact via Upwork message or request a secure contact channel for further details or the full CV.
Short introduction
I am an experienced backend software engineer with strong expertise in Java backend development and large‑scale data processing. I have end‑to‑end SDLC experience (requirements → design → implementation → release → operations). My strengths include SQL and database performance tuning, microservices and distributed systems, containerization and CI/CD, and practical security assessments. I am comfortable producing technical work and documentation in Chinese, English and Japanese.
Key skills / Tech stack
- Languages & frameworks: Java (Spring Boot / Spring MVC), MyBatis / Hibernate (JPA)
- Databases: Oracle (OCP), PostgreSQL, MySQL — SQL tuning, indexing, partitioning
- Big data & messaging: Hadoop concepts, Spark (batch), Kafka, RabbitMQ
- Infrastructure: Docker, Kubernetes (basic), Git, Maven/Gradle, Tomcat
- Cache & search: Redis, Elasticsearch
- Observability: ELK (Elasticsearch/Logstash/Kibana), Prometheus + Grafana
- Security: OSCP, OWASP Top10 awareness, Burp Suite basics, secure code review
- Languages: Chinese (native), Japanese (N2)
Responsibilities & contributions (examples; non‑sensitive)
- Technical ownership / backend lead: translate requirements into API/service design; drive implementation, code review and release.
- Performance & reliability: reduce latency and increase throughput via SQL rewrites, index tuning, JVM profiling and caching.
- Data processing: design and maintain ETL / batch pipelines; optimize heavy reporting queries and batch windows.
- Observability & ops: implement logging and monitoring stacks; prepare runbooks and support incident response.
- Localization: implement encoding‑safe storage, locale‑aware date/number handling, translation keys and fallback logic to support EN/ZH/JA users.
- Team & process: define SQL/code review checklists, improve CI/CD automation and mentor junior engineers.
Certifications
- OSEP — Offensive Security Experienced Penetration Tester (2025)
- OSCP — Offensive Security Certified Professional (2021)
- OCP — Oracle Database 11g Administrator Certified Professional (2017)
Availability & preferences
- Type: Part‑time / contract (remote preferred; hybrid or short business trips negotiable)
- Timezone: Based in Tokyo (UTC+9); can accommodate APAC and partial overlap with other timezones
- Capacity: Open to weekly-hour contracts or milestone-based work; availability depends on project scope and budget
- Rate: Hourly or milestone pricing — to be negotiated in initial discussion
Contact
To protect privacy, direct contact details are not published in this README. Please connect via Upwork messages or use the "Request contact" button on the public page to request a secure contact channel or the full CV in PDF.
