Việc làm cho sinh viên Đại học Sư phạm Kỹ thuật Nam Định

- Thực hiện các công việc sau đây đối với các CSDL của các dịch vụ được phân loại cấp độ 1, 2 và 3 theo bảng phân loại cấp độ HTTT đã được ban hành:• Cài đặt orasoft, tạo các CSDL, cấu hình các tham số theo tiêu chuẩn tham số cấu hình CSDL.• Dựng các CSDL standby phục vụ cho dự phòng; đảm bảo các CSDL standby luôn được đồng bộ với CSDL primary• Thực hiện sao lưu các CSDL hàng ngày, validate các bản backup này; thực hiện restore, recover định kỳ để kiểm tra tính sẵn sàng của các bản backup các CSDL production.• Update các bản patch, version cho các CSDL của Công ty• Cấp phát tài khoản, phân quyền theo đúng ma trận phân quyền đã được ban hành• Triển khai các kỹ thuật, công nghệ trên CSDL để đáp ứng tuân thủ các yêu cầu của tiêu chuẩn PCI DSS, các chính sách CNTT và các quy định Ngân hàng nhà nước.• Hỗ trợ các phòng ban trong việc cập nhật dữ liệu ứng dụng; cập nhật cơ sở dữ liệu ứng dụng và phục hồi CSDL khi có yêu cầu• Tham gia triển khai các công việc về CSDL ở mức độ trung bình và khó trong các dự án, gói mua sắm của Công ty• Xử lý các sự cố ở mức trung bình đối với các CSDL• Thực hiện tối ưu hoạt động CSDL ở mức trung bình- Tham gia xây dựng, chuẩn hóa các quy định, quy trình, chính sách về vận hành quản trị CSDL- Phối hợp triển khai tuân thủ các chính sách, quy trình và tiêu chuẩn kỹ thuật trên các CSDL.- Tham gia các dự án, gói thầu, gói mua sắm của Công ty liên quan tới mảng công việc được giao.- Hoàn thành các công việc khác do lãnh đạo phòng phân công.

Are you an experienced Project Manager (Japanese N2+) with a strong background in IT and software delivery for the Japanese market? We are seeking a proactive and results-driven leader to manage complex projects, ensure high-quality outcomes, and collaborate effectively with both internal teams and Japanese clients. Plan and lead implementation projects of varying size and complexityManage project teams, including task assignment, progress tracking, and quality assuranceEstimate workload, develop work plans, and oversee delivery within scope, budget, and timelineEnsure accurate project reporting, including risk and change management, and financial controlBuild and manage team members, including training, development, and career path planningLead and execute tasks to ensure project success across quality, cost, and scheduleMaintain effective communication with internal stakeholders and external clientsPerform other tasks as assigned by the Manager or Senior Manager.

Released at least one product on the App Store or Google Play. Develop mobile applications using Flutter. Work with the project team to analyze, design, and implement features. Build functionalities related to mobile banking, e-wallets, e-commerce, and I/O tasks (camera, printer, Bluetooth, etc.). Report progress directly to the manager. Collaborate to maintain, support, and upgrade applications after release

Eurofins IT Solution is looking for an experienced BMC Helix Developer to join our dynamic team. This role will involve working with a diverse group of professionals to develop, integrate, and maintain BMC Helix solutions that meet our clients' unique needs. Key ResponsibilitiesSolution Development: Design, develop, and implement BMC Helix applications and solutions tailored to business requirements.Integration: Integrate BMC Helix with other enterprise systems and third-party applications such as Intune, SCCM, XSOAR, Monitoring tools (SolarWinds, Site 24/7) to ensure seamless operations and data flow.BMC Discovery and CMDB health: Ensuring the Configuration Management Database (CMDB) is synchronized with the data discovered by BMC Discover.Customization: Customize BMC Helix modules, workflows, and user interfaces to enhance usability and meet specific business needs.Technical Support: Provide technical support and troubleshooting for BMC Helix applications, ensuring timely resolution of issues and minimal disruption to business operations.Documentation: Create and maintain detailed technical documentation, including design specifications, testing plans, and user guides.Collaboration: Work closely with project managers, business analysts, and other stakeholders to gather requirements, provide status updates, and deliver high-quality solutions on time and within budget.Training: Provide training and support to end-users and IT staff on BMC Helix functionalities and best practices.Continuous Improvement: Stay up to date with the latest developments in BMC Helix and IT service management to identify opportunities for process improvements and innovation.Support: Support issues related to the applications: Digital Workplace, Smart IT, Helix Dashboard, Remedy Single Sign-On, Mid-tier. Provide support for BMC Remedy ITSM modules including Incident Management, Problem Management, Asset Management, Configuration Database Management, Service Level ManagementConfiguration: Configure Foundation data and set up ITSM modules. Manage Service Requests using SRM or the Digital Workplace Catalog. Create reconciliation jobs, custom datasets, attributes, and classes in CMDB. Maintain CMDB health checks and configure notifications using HTML.Reporting: Create Reports, Dashboards, and distribute reports.Others: Respond to and resolve issues within defined SLAs. Engage with BMC to identify and resolve issues. 

Are you an experienced (Senior) Android Engineer looking for your next career move? Do you have a background in design & architecture and development of digital products? If so read on. The team:You will be part of our Digital Delivery Hub who are responsible for designing, developing and maintaining some of the most interesting and innovative digital apps within the financial services space that are at the forefront of the market. Our Hub is focused on building a world class User Experience, Design and Web / Mobile Development team that can work with the business to realise an exciting digital strategy. The role:We are looking for a talented (Senior) Android Developer who still does hands-on development to contribute in the development and execution of an innovative mobile banking solution in Asia. This will include the development of in-country and cross-border solutions across all facets of a mobile banking operation including customer experience and design, developing and implementing new products and services, process engineering and other functional deliverable. Risk management and technology innovation will be essential for your success.You will be responsible for technically leading and coaching our engineers who work in cross-functional delivery teams to design and build best-of-breed mobile solutions whilst maintaining necessary support for ongoing products. Your duties will be to:Provide hands-on technical leadership and development in mobile solution development – you will get your hands dirty.Provide a leading voice in the evolving mobile architecture framework and road-map covering languages, tooling, patterns and delivery processes.Enhance our talent pool ensuring that our team’s skills and practices are leading edge and aligned to technology strategy.Provide technical guidance through the complete Solution Development Life Cycle.Developing solution architectures aligned with enterprise-wide standards to ensure successful implementation of technology solutions.Lead the technical design process coordinating various stakeholders; develop and document solution architectures for projects aligned to bank’s standards and policies.Custodian of design and engineering best practices; and technical app road-maps.

Phân tích, thiết kế và phát triển các hệ thống phần mềm phục vụ quản lý nguồn vốn, nghiệp vụ tài chính kế toán, tích hợp hệ thống ERP.Phát triển và tối ưu các dịch vụ backend sử dụng .NET Core (Web API, Worker Service...), phục vụ giao tiếp giữa các hệ thống nghiệp vụ và kế toán.Làm việc chặt chẽ với các chuyên viên phân tích nghiệp vụ (BA), kế toán viên để đảm bảo hiểu đúng và triển khai chuẩn quy trình kế toán, định khoản, báo cáo.Xây dựng các thành phần tích hợp với hệ thống bên ngoài: ngân hàng, hệ thống ERP nội bộ, phần mềm kế toán, kho dữ liệu...Thiết kế CSDL quan hệ, viết stored procedure, tối ưu hiệu năng truy vấn phục vụ xử lý dữ liệu tài chính lớn và phức tạp.Tham gia rà soát mã nguồn (code review), tối ưu kiến trúc kỹ thuật, đảm bảo hiệu suất và bảo mật hệ thống.Tham gia triển khai, vận hành, hỗ trợ khắc phục sự cố trong quá trình đưa hệ thống vào hoạt động thực tế.

Là cầu nối quan trọng giữa khách hàng với bộ phận kỹ thuật (thiết kế, developer…);Phân tích và làm rõ các yêu cầu của khách hàng, thiết kế lại các quá trình sử dụng, vận hành của dự án;Tài liệu hóa hướng dẫn hệ thống;Viết, chuẩn bị các tài liệu đặc tả yêu cầu phần mềm cho các ứng dụng sẽ được phát triển phục vụ bộ phận kỹ thuật dự án và khách hàng sử dụng;Tư vấn trên góc độ nghiệp vụ dựa vào các phân tích và nghiên cứu của mình;Truyền đạt nội dung, hỗ trợ các thành viên dự án, người quản lý dự án để làm rõ yêu cầu của khách hàng cần đáp ứng; tổ chức hướng dẫn, hỗ trợ cho người dùng sử dụng sản phầm và xử lý sự cố khi vấn đề xảy ra.Traning, hướng dẫn các thành viên khác trong teamCó kiến thức tốt về sản phẩm có thể phát triển lên vị trí product owner

At MB Life, we believe that AI is the core driver of breakthroughs in the insurance industry and a key enabler for optimizing the way we work. As a Senior AI/ML Engineer, you will be at the forefront of exploring, evaluating, and applying cutting-edge AI technologies from the open-source community and leading global providers to solve real-world business challenges.Your mission is not to build everything from scratch, but to stand on the shoulders of giants—leveraging the power of pre-trained models, cloud-based AI platforms, and open-source solutions to deliver value quickly, from enhancing customer experiences to automating and accelerating internal software development processes.Key Responsibilities1. Research, Experimentation, and Integration of AI Solutions:Proactively research and evaluate AI models, libraries and cloud-based AI services to identify the most suitable technologies for each use case.Rapidly build Proof-of-Concept (PoC) prototypes to validate the feasibility and effectiveness of AI solutions before large-scale deployment.Design system architectures and directly integrate AI solutions into the company’s existing systems (Java backend, Flutter/Dart applications) via APIs. This includes writing and testing code to connect AI models or services to our applications, and supporting the development of a Model Context Protocol (MCP) Server to enable AI systems to safely interface with external tools and data sources2. Process Automation and Optimization with AI:Analyze the Software Development Lifecycle (SDLC) and propose AI-driven tools (e.g., AI Copilots, AIOps, AI for Testing) to improve efficiency and quality.Contribute to internal solutions using retrieval-augmented generation (RAG) techniques to make the company’s knowledge bases (Jira, Confluence, other documentation) more accessible and useful for employees.Implement CI/CD pipelines for continuous integration and delivery of AI services, ensuring that new model versions and data updates can be rolled out efficiently. Monitor the performance, accuracy, and cost of AI systems in production (using logging, monitoring, and tracing frameworks) to detect issues or model drift early, and establish guardrails (governance policies, access controls, ethical AI guidelines) to ensure solutions are secure, compliant, and aligned with responsible AI practices.Implement N8N workflow automation platform to resolve business requirement

Job Objective:Design, implement, and optimize CDN, reverse proxy, caching, and backend processing strategies to ensure:Fast response timeOptimal load distributionSignificant reduction of database and application-layer trafficKey Responsibilities:🔹 Backend API & Application Optimization:Optimize heavy-load, high-concurrency APIs (Golang/NodeJS).Refactor CPU-blocking or slow I/O logic.Measure and improve performance using tools such as APM, Prometheus, Grafana, and Sentry.🔹 Multi-layer Caching Architecture:Edge Caching (Cloudflare CDN): Configure Cache-Control, Workers, Page Rules, etc.Reverse Proxy Caching (NGINX): Implement dynamic caching (micro-cache) and API route caching for GET/HEAD.Application Layer Caching: Redis, in-memory caching (LRU, TTL logic).Database Result Caching: Redis cache + key versioning to reduce duplicate queries.🔹 Smart Cache Integration & Invalidation:Implement event-driven cache invalidation based on data changes.Apply “stale-while-revalidate” or “cache-aside” caching patterns.🔹 Cloud & CI/CD for Performance Support:Configure autoscaling (CPU/Memory, HPA on K8s).Collaborate with DevOps on GKE architecture and Cloudflare rules.Build performance testing scripts (k6, Locust, Artillery, etc.). 

About the RoleWe are looking for a Senior QC Engineer to take full ownership of testing activities for our Web and Mobile platforms. This role focuses on test planning, execution, and defect tracking to ensure every release meets our quality standards. You will also guide junior testers and help improve testing accuracy and speed through clear documentation and coordination.**Key Responsibilities1. Testing ExecutionWrite and run detailed test cases for new features, updates, and bug fixes.Execute different testing types: Functional, Regression, Integration, System, and UAT.Review requirement documents and user stories to confirm expected behavior and test coverage.Record test results and log all defects in Jira with clear steps, screenshots, and evidence.Recheck fixed defects and confirm their status before deployment.2. Test Planning & ReportingPrepare and update test data, environments, and configurations before each test runs.Track daily test execution and update progress in QA tracking tools.Summarize test results after each sprint and highlight failed or blocked cases to the Team Lead.Keep all test documents organized for easy handover and audit.3. Mentorship & CollaborationReview junior testers’ test cases and give direct feedback on accuracy and coverage.Pair with Developers and Product Owners to reproduce defects and verify fixes.Join sprint review meetings to test completed features and confirm readiness for release.

:Thiết kế và xây dựng các chuỗi công cụ DevOps, chuyển đổi yêu cầu kỹ thuật thành quy trình triển khai phần mềm hiệu quả.Xây dựng, tối ưu hóa luồng CI/CD tự động, đảm bảo tính lặp lại, khả năng mở rộng và độ sẵn sàng cao của hệ thống.Thiết kế và triển khai kế hoạch kiểm thử tự động cho từng nhóm tính năng của ứng dụng quản lý dịch vụ CNTT.Quản lý và vận hành hệ thống trên nền tảng Cloud (AWS, Azure, GCP...), thực hiện các tác vụ như backup, upgrade, patching, triển khai và giám sát.Vận hành hệ thống trên các môi trường Staging/Production, phối hợp xử lý sự cố với các bộ phận liên quan.Hướng dẫn, đào tạo nhân sự DevOps cấp dưới; hỗ trợ nhóm phát triển trong việc xử lý các vấn đề kỹ thuật phức tạp.Ghi chép tài liệu kỹ thuật, quy trình vận hành và phân tích hiệu suất hệ thống, đề xuất cải tiến liên tục.Tham gia triển khai hệ thống cho khách hàng bên ngoài, phối hợp kỹ thuật và hỗ trợ trong quá trình bàn giao.

About NAVER Corp and NAVER Vietnam: NAVER Corp NAVER Corp is South Korea’s leading technology company, best known for the NAVER search engine, LINE messenger (200M+ users), SNOW app, and NAVER WEBTOON. In 2018, NAVER was ranked 9th most innovative company globally by Forbes and listed in Fortune's top 6 Future 50. NAVER Vietnam In 2021, NAVER expanded into Vietnam to tap into the country's growing Information Technology market by initially partnering with two leading universities in Hanoi. Later that year, the NAVER Vietnam Development Center (NVDC) was established in two major cities: Ho Chi Minh City and Hanoi. With rapid growth, NAVER Vietnam is currently delivering a range of large-scale services, including NAVER Financial (Npay), NAVER Clip, Weverse, NAVER WORKS, and other Global NAVER platforms. Upholding the core values of "Autonomy – Challenge – Teamwork", the company is committed to becoming one of Asia’s most advanced development centers. In both 2023 and 2025, NAVER Vietnam was honored as the  by ITViec.com — a remarkable milestone that reflects its rapid growth and innovation. Learn more about us: We are looking for Backend Engineers (Java/Kotlin/Spring).  

DataXight, headquartered in Mountain View, CA, is on a bold mission to transform healthcare through groundbreaking data-driven solutions. We're passionate about empowering our team to work on projects that not only push boundaries but also make a tangible difference in the lives of millions. Are you ready to be part of something greater? The RoleAs a Senior Quality Engineer, you’ll play a key role in ensuring reliability and performance of our distributed systems. You’ll drive automation initiatives, design robust test frameworks, and mentor junior engineers while collaborating with product management, software, DevOps, data engineering, and security teams to maintain world-class quality. This position is preferably based in Ho Chi Minh City, Vietnam What You’ll DoLead test automation strategy and framework design for backend and cloud-based services.Implement and maintain automated tests for functionality, scalability, and performance.Drive continuous integration and deployment test practices (e.g., GitHub Actions, Jenkins).Collaborate with developers and DevOps to improve test reliability and coverage.Review code and promote QA best practices across teams.Identify quality risks early and proactively drive solutions.Mentor and support junior QE engineers.Ensure release compliance through test result reporting.

At MB Life, we believe that AI is the core driver of breakthroughs in the insurance industry and a key enabler for optimizing the way we work. As a Senior AI/ML Engineer, you will be at the forefront of exploring, evaluating, and applying cutting-edge AI technologies from the open-source community and leading global providers to solve real-world business challenges.Your mission is not to build everything from scratch, but to stand on the shoulders of giants—leveraging the power of pre-trained models, cloud-based AI platforms, and open-source solutions to deliver value quickly, from enhancing customer experiences to automating and accelerating internal software development processes.Key Responsibilities1. Research, Experimentation, and Integration of AI Solutions:Proactively research and evaluate AI models, libraries and cloud-based AI services to identify the most suitable technologies for each use case.Rapidly build Proof-of-Concept (PoC) prototypes to validate the feasibility and effectiveness of AI solutions before large-scale deployment.Design system architectures and directly integrate AI solutions into the company’s existing systems (Java backend, Flutter/Dart applications) via APIs. This includes writing and testing code to connect AI models or services to our applications, and supporting the development of a Model Context Protocol (MCP) Server to enable AI systems to safely interface with external tools and data sources2. Process Automation and Optimization with AI:Analyze the Software Development Lifecycle (SDLC) and propose AI-driven tools (e.g., AI Copilots, AIOps, AI for Testing) to improve efficiency and quality.Contribute to internal solutions using retrieval-augmented generation (RAG) techniques to make the company’s knowledge bases (Jira, Confluence, other documentation) more accessible and useful for employees.Implement CI/CD pipelines for continuous integration and delivery of AI services, ensuring that new model versions and data updates can be rolled out efficiently. Monitor the performance, accuracy, and cost of AI systems in production (using logging, monitoring, and tracing frameworks) to detect issues or model drift early, and establish guardrails (governance policies, access controls, ethical AI guidelines) to ensure solutions are secure, compliant, and aligned with responsible AI practices.Implement N8N workflow automation platform to resolve business requirement

Key ResponsibilitiesAI ENGINEERWork closely as a project team as the main contributor in the entire lifecycle of data science projects, from gathering business requirements to solution delivery, and deliver project outcomes to internal stakeholders or external customers.Engages with clients to understand business needs, present findings, and align technical work with stakeholder goals.Provides structured feedback to junior members, supports onboarding, and contributes to skill-building within the project team.Developing scalable AI systems and designing/building algorithms that automate predictive data models.Creating and managing the AI development and production infrastructure, including automating AI infrastructures for data science teams.Participating in all phases of AI solutions development, from requirements definition and design to development, deployment, integration, maintenance, performance tuning, and monitoring.Collaborating extensively with cross-functional teams, including data scientists, software engineers, and product managers, to define project requirements, ensure seamless progress, and facilitate AI adoption and best practices.Driving scalability improvements and introducing new capabilities in machine learning platforms, often working across the full stack on tools and infrastructure that empower machine learning teams.DATA SCIENTISTWork closely as a project team to lead in the entire lifecycle of data science projects, from gathering business requirements to solution delivery, and deliver project outcomes to internal stakeholders or external customers.Engages with clients to understand business needs, present findings, and align technical work with stakeholder goals.Owns planning of assigned modules, contributes to task breakdown, estimation, and milestone alignment, and supports backlog grooming discussions.Leads development of a complete module or sub-system (e.g., full model training pipeline or certain solution direction). Can propose solution design, test, and iterate independently. Coordinates with project lead to align with project needs.Proactively explores and evaluates new tools or methods relevant to the problem domain and integrates them into module-level components with minimal supervision.Provides structured feedback to junior members, supports onboarding, and contributes to skill-building within the project team.Proactive in contributing to the growth of internal capabilities (e.g., training, knowledge-sharing, framework design).

Điều hành SOC 24/7: xây dựng đội ngũ Tier 1-3, DFIR, TI, định nghĩa & giám sát KPI MTTD, MTTR, false-positive; báo cáo trực tiếp cho CISO/Ban Điều hành.Thiết kế, ban hành và cập nhật các SOP/Playbook IR, Threat Hunting, Change Management, Crisis Communication;Thiết kế kiến trúc giám sát đa lớp (SIEM, SOAR, EDR, NDR,Cloud,…) và phát triển use case ưu tiên ransomware, thất thoát dữ liệu, insider threat và DDoS trong môi trường giao dịch chứng khoán.Threat Hunting & Content Tuning: Quản lý Threat Intelligence, cập nhật IOC/IOA. Lên định kỳ chiến dịch Threat Hunt theo MITRE ATT&CK/STRIDE/PASTAPhòng chống ransomware: duy trì phương án backup offline, cô lập EDR, diễn tập tabletop và vận hành quy trình IR theo NIST SP 800-61.Triển khai & vận hành DLP: phân loại dữ liệu, giám sát email/web/cloud, thiết lập quy trình xử lý sự cố đáp ứng yêu cầu tuân thủ ngành tài chính.Giám sát insider threat: phân tích xu hướng truy cập, tải dữ liệu bất thường; phối hợp HR & Legal để điều tra, lưu giữ chứng cứ số.Phòng chống & Ứng phó DDoS: vận hành mô hình đa tầng (Anycast DNS, CDN/WAF rate-limit, scrubbing-center, BGP Flowspec) bảo đảm SLA giao dịch thời gian thực.Báo cáo, tuân thủ: Xây dựng dashboard Scorecard (SLA/OLA, MITRE ATT&CK coverage, risk trending) và báo cáo cấp quản trị/CISO/BOD hàng tuần. Hỗ trợ kiểm toán nội bộ, đánh giá ISO 27001/NIST CSF; chuẩn bị bằng chứng và báo cáo tuân thủĐào tạo & Nâng cao nhận thức: Chủ trì chương trình diễn tập (Table-top & Red/Blue/Purple); chia sẻ tin tức, xu hướng tấn công mới.Quản lý ngân sách & vendor: lựa chọn MSSP, threat-intel feeds, dịch vụ DDoS mitigation; đàm phán SLA và kế hoạch mở rộng SOC tương lai.

About the roleAs a Senior DevOps Engineer at playSTUDIOS, you will be a key contributor in designing, implementing, and maintaining scalable infrastructure that powers engaging gaming experiences enjoyed by millions worldwide. You will ensure reliability, automation, and performance across development and production environments, while also mentoring teammates and driving DevOps projects with autonomy. Responsibilities1. CI/CD & Automation:Design, maintain, and enhance build pipelines for .NET and Java microservices, Unity, and Android/iOS, using continuous integration and deployment best practices.Automate manual tasks related to code deployment, infrastructure provisioning, and data management.2. Infrastructure & Cloud:Provision, manage, and evolve infrastructure using an Infrastructure-as-Code (IaC) approach (e.g., Terraform).Manage, debug, and operate the Kubernetes fleet across Azure and AWS environments.Deploy and maintain high-volume, scalable web services with a focus on reliability and performance.3. Collaboration & Delivery:Partner with developers, testers, and system administrators to streamline the software development lifecycle.Work alongside engineering teams to deliver on the technology roadmap.Successfully drive DevOps projects autonomously, ensuring on-time, high-quality delivery.4. Operations & Reliability:Ensure high availability of services and rapid response to production incidents; participate in the on-call rotation.Triage, resolve, or escalate production issues to minimize downtime.Maintain and enhance logging, monitoring, and alerting systems (e.g., Prometheus, Grafana, Azure Application Insights, CloudWatch).5. Leadership & Continuous Improvement:Act as a mentor for junior team members, supporting their growth.Maintain thorough documentation of tooling, processes, and procedures.Identify new opportunities, propose alternative solutions, and drive continuous improvement initiatives.

VIETTEL CUSTOMER SERVICE (VCX)Công ty TNHH MTV Dịch vụ Khách hàng Viettel - Viettel Customer Service là công ty công nghệ về dịch vụ khách hàng, cung cấp toàn trình: từ Tư vấn, thiết kế, đến cung cấp giải pháp, phần mềm và nhân sự, giúp nâng cao trải nghiệm khách hàng bằng công nghệ sáng tạo. Chịu trách nhiệm triển khai, cấu hình và đảm bảo hệ thống ứng dụng vận hành ổn định, liên tục theo đúng tiêu chuẩn kỹ thuật.Quản lý và duy trì đầy đủ tài liệu cài đặt, cấu hình, vận hành hệ thống và quy trình xử lý sự cố.Thực hiện nâng cấp hệ thống, cập nhật ứng dụng định kỳ hoặc theo yêu cầu đảm bảo an toàn và hiệu năng.Tham gia triển khai hệ thống cho khách hàng bên ngoài, phối hợp kỹ thuật và hỗ trợ trong quá trình bàn giao.Đào tạo level thấp hơn.