XiaoFeng is very well versed in C++ syntax and produce both working and high quality code quickly. 

XiaoFeng finishes the main question error free quickly. He ran through a test case to uncover a bug in the code which is great. He also analyzes the runtime complexity of the algorithm correctly.

For the follow-up question, XiaoFeng not only was able to think of the brute force solution right away, (Although the time complexity analysis was done incorrectly at first) but was also able to optimize the brute force solution and use a trie to reduce the time complexity in certain conditions. XiaoFeng then proceed to implement the more efficient Trie solution flawlessly.

For the runtime analysis, there was a small mishap but XiaoFeng was able to quickly correct it and come to the right conclusion. I am very impressed by XiaoFeng’s performance today.

Tech Lead, Full Stack

Coding Interview Summary:

Solid communication skill, solid understanding of algorithm and data structures but a bit lacking in efficacy and coding ability for complex problem

Fei quickly went through the first problem. He was able to quickly identify edge cases in the input and argue the time complexity correctly. Fei then spent around 10 minutes coding through the first problem. He was able to identify the error in his code on his own twice and ended up presenting a bug-free and mostly clean (there are some weird uses of global variables and inconsistency between types in the code) solution.

For the follow up question, Fei was able to think of a brute force solution right away. Fei then spend the next 5 minutes or so thinking about what the time complexity is. After a small hint, Fei was able to correctly settle the time complexity of the algorithm. Although Fei was able to quickly identify the problem require backtracking algorithm, Fei was unable to implement a working solution in the given time frame. 

Tech Lead

He is a technology leader with over 20 years of experience in the commercial software industry. He has 4+ years of software development management and 10+ years of technical leadership experience. He has extensive full-stack software development experience primarily in C++, and possesses creative thinking, goal setting, and strong problem-solving and analytical skills. He is highly skilled in managing and planning the development work of a product from roadmap to delivery, providing innovative solutions to complex problems, and designing tailored solutions to ensure customer satisfaction. He is experienced in managing product backlog, team workload, resource allocation, and planning, and has extensive knowledge of software development framework implementations including SAFe. He is proficient in maintaining various productivity goals and software development KPIs Dashboard, and has experience in product and project management, including offshore projects. He is fully versed in making presentations and developing documentation, and has the ability to communicate ideas to all levels of management, customers, and cross-functional teams.

Lead QA

Varun R. has over 9 years of experience in manual and automation testing. And with over five years of management experience with a mid size QA Team. They are proficient in automation testing using Selenium/Appium with Java and WebdriverIO with NodeJS. The candidate is experienced in Agile methodologies and has worked at several reputable companies. They are skilled in NodeJs, WebdriverIO, Restful, Java, TestNG, Applitools, Selenium/Appium, Git, SQL, Jenkins, AWS/GCP, and Cucumber.

Tech Lead, Frontend 

1, about 8 years of front-end development experience, project experience and resume is relatively rich, good at the old system of 2 development, 20 + team management experience

2, the current stage of work is mainly responsible for the general module architecture, core function development, team building, performance assessment, with a certain methodology

3, for the core implementation of the framework used and ecological familiar with the skilled application of professional technology, more efficient, high quality to complete the business requirements

4, good English foundation, listening and reading is great

5, personal love of technology, future work expectation technology accounted for a relatively large

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Data Architect

 An experienced Cloud Data Architect with over 20 years of experience in the retail industry. They are a Google Cloud Platform certified Professional Data Engineer and have worked as a Technical Solution Delivery lead in Enterprise-wide Analytical Solutions on GCP. Their responsibilities include processing data loading in BigQuery from Google cloud storage using Google DataFlow, designing, developing, and delivering data integration/data extraction/data migration using DataFlow to GCP, scheduling end-to-end using GCP cloud composer service, and maintaining BQ datasets for reporting requirements. They have hands-on experience in Google BigQuery, Google Cloud Storage, Google Dataflow, CloudSQL, Google Cloud Dataproc, Google Pub/Sub, Sqoop, and PySpark. The candidate has experience in building and architecting multiple Data pipelines, end-to-end ETL, and ELT processes for data ingestion and transformation in GCP. They have also designed Enterprise Financial Reporting from Teradata for critical reports used by management like PNL, Corporate Balance Sheet, Supply Chain, Store Inventory, Sales, and Gross Margin, NSR leveraging SAP as a data source. The candidate has experience working with Teradata, SQL, DataStage, Unix scripts, Informatica PowerCenter, Workflow Manager, Netezza, Oracle 9i, and Business Objects. They are also proficient in Agile Planning for Software Products.

Backend Developer

He is a senior backend engineer. In his current position, he is cooperating in the development of various banking solutions using BaaS (BackbaseasaService) which contains an AWS cloud-hosted banking platform and SDLCtools for maintaining the applications.

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Data Science

Over 5 years of experience in database design, development, and maintenance of business intelligence applications. They are highly proficient with ETL and BI Stack (Python, Tableau) within large and complex development/production environments and have experience within multiple industries, including banking, technology, research, and healthcare. They are skilled in multiple databases, programming languages, integration services, reporting services, automation tools, and data modeling. The candidate has worked as a BI Engineer at ByteDance, a BI Leader at NIKE, a Senior Data Analyst/ETL Developer at Morgan Stanley China, a Data Analyst/DevOps at Apple Inc, and a Sr. Database Administrator at UHG/Monarch HealthCare, Inc.

Backend Developer

Senior Software Engineer with experience in designing and owning upload and download services and features for the Media Infrastructure team at LinkedIn. They have also worked as a Senior Software Engineer at Bloomberg L.P., where they worked on the EMSX function in the data infrastructure team for trading applications. They have experience using Kafka, in-house modern C++ async library, and other tools for building trading features. The candidate has also worked as a Software Engineer at VMware Inc, where they worked in the Virtual Storage BU and implemented RAID tree configuration in software-defined storage, developed distributed storage features with storage resiliency and reliability, and implemented and designed new features relating to data consistency and availability. Additionally, the candidate has a patent for efficient resynchronization for stale components of geographically distributed computing systems. They also have experience as a Software Engineer Intern at Google Inc and have won first place out of 20+ teams for building a complete system for remote monitoring using Virtual Reality and IoT technology during their Capstone Project at Siemens.

精通NestJS + TypeScript + Kubernetes 

支付集成经验丰富，之前做过adyen,stripe相关的支付集成，做过shopify相关的集成

前端工程师

1. 7年以上前端开发经验，熟悉React, threejs, C/C#
2. Ex. 字节
3. 丰富的前端项目和海外项目经验，有管理类工具notion 和低代码平台 （airtable）的项目经验
4. github: https://github.com/stephenLYZ

1. Possess extensive technical expertise and a track record of successful project implementation and team management. Capable of taking on responsibilities such as technical route planning, architecture design, talent training, and process optimization. Skilled in designing and executing medium to large-scale projects or products.
2. Demonstrates strong logical thinking skills and the ability to design technology, business, and application architectures that support business growth. Experienced in implementing fault tolerance and application resilience strategies to ensure robust systems.
3. Effective in communication and coordination within cross-functional teams, with a focus on creating a conducive learning environment. Sets an example for the team in both technical and interpersonal aspects, enhancing team cohesion and execution.
4. Brings valuable experience from working in multinational companies, comfortable operating in a bilingual environment.

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Time Zone: GMT+8

Work Efficiency: 88%

Coding Test Score (Level: Intermediate): 80/100 

Architect

1. Technical breadth and depth of accumulation, rich project implementation experience can lead the technical team to complete the implementation of medium to large-scale products or projects. You can undertake the work of business combing, business process design, application architecture design, technology selection, core code implementation, code review, team management and project management, etc. You can lead the technical team to complete medium to large-scale product implementation work. However, the project experience in technical depth and service governance is not very rich.

2. have the ability to design the architecture of medium and large scale projects, and can act as an agent for medium and large technical teams to complete the design and implementation of products.

3. good performance in language expression have the work of R&D team management, project management, etc., and can undertake the technical attack in the team.

4. foreign language should be able to Work and communicate normally in a bilingual environment.

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1.Solid computer foundation, experience in using C language to do some high performance component development and familiar with TCP/IP protocol, as for the application layer project can use Golang and NodeJS + related framework to complete the back-end development work. Can undertake the work of business combing, process design, application architecture design, technology selection, coding implementation and unit testing, etc.

2.Good logical thinking and application design performance can give a reasonable solution in a given scenario and can elaborate on the defects of the solution and optimize the solution, and have the ability to design application architecture for medium to large projects and fully consider the characteristics of the product when designing the architecture to allow for appropriate extension paths such as Plugin mechanism.

3. Good language skills to explain the business process, data flow and technical architecture of the project in a clear and concise manner.

4. Good performance in foreign language with experience in working remotely with foreign colleagues and can work in a bilingual environment and submit relevant information in English.

Backend Developer

1.The candidate has clear logical thinking and good language skills

2.Good learning ability, can quickly adapt to different technology stacks and business areas

3.Master basic design patterns and have good experience in engineering process specification

4.English can be the working language Comprehensive evaluation: Intermediate and senior engineer

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Tech Lead, Full stack

1. The candidate has 9 years of front and back-end development experience, is proficient in Node JS, Python, and Postgres-based back-end systems, familiar with the language and framework including node.js, javascript, typescript, react, c#, etc., familiar with the middle of Redux, Webpack, Vite, familiar with SQL server database

2. The main business areas that the candidate is familiar with include the SAAS platform, new retail, and enterprise OA.

3. The candidate has had long-time full-time remote work experience in the past and is familiar with the remote work mode.

Tech Lead, Backend 

1. Logical thinking: thoughtful years of experience in project architecture design, application design, team management, etc., can reasonably design the application architecture and technical architecture of the development trend in the given industry to serve the industry, and at the same time reasonably reserve the expansion space of the product and plan the later technical evolution path according to the accumulation of business knowledge in the industry for many years.

2. Organizational coordination: rich experience in coordinating different teams of human resources responsible for product implementation, and can arrange the entry and exit of different resources in advance according to the progress of the project. At the same time, I have excellent experience in customer communication and internal resource coordination, and I can quickly develop friendship with colleagues and customers by being friendly to others.

3. Communication and expression: I can fully explain the technical architecture, data flow, business process and product enablement of the business of the project I am in charge of and speak with affinity to give full respect to the participants, and can adjust the expression and speed of speech when the other party's feelings change so that the other party can quickly become familiar with the things explained.

4. English: With rich experience in foreign companies, you can handle the work in a bilingual environment normally. Also have rich experience in cross-team and block area communication and coordination.

5. professional ability: technical breadth and depth have been accumulated, rich experience in team management and project implementation from 0 to 1; can lead the technical team to complete the implementation of medium to large-scale products or projects, and can undertake tasks such as architecture design, technical selection, development of technical specifications and technical evolution path, business process design, and project and team management in the team, while in the technical options In the meantime, we will choose a certain middleware or framework reasonably according to the constraints of the team and the ecology and business relevance of the middleware.

6. project management: given the requirements and implementation time, we can reasonably schedule the project implementation plan, human resources and technical research work, and have good risk identification and early warning ability to ensure the project delivery on time and in quantity.

7. Summary: Overall performance is excellent, with rich experience in designing, realizing and implementing data processing projects, and good experience in implementing projects with high concurrency, high availability and high performance, as well as good accumulation of technical depth, with the ability to design the architecture of medium and large projects and a lot of experience in implementing and optimizing the performance of products with "three high" characteristics. Low-key approach to the world, will not be disrespectful to colleagues or customers because of the high or low position