What is the interview process like at ByteDance?

This guide draws on 51 first-hand interview accounts from Nowcoder. Candidates describe about 1 round on average, most often technical interviews, system design and a hiring manager interview.

What topics does ByteDance test in interviews?

Commonly reported topics include Longest palindromic substring, LangChain vs LangGraph, Processes vs threads, RAG, SSE reconnection, Project deep-dive.

ByteDance Interview Questions & Experience

LLM Agent Engineer (Doubao)

Outcome not shared

Internship. 1 round. Shared by Code_Agent on nowcoder, 1970-01-01

1First roundTechnicalAgent system design questions on workflow structure, tool safety, memory and RAG debugging.Covered: Multi-agent responsibility split, Agent workflow stages, System prompts vs tool descriptions, Tool-call argument validation, What stays in code vs model, Memory design, Diagnosing RAG failures

LLM Agent Engineer (Doubao)

Outcome not shared

Internship. 1 round. Shared by Code_Agent on nowcoder, 1970-01-01

1Second roundTechnicalDeeper discussion of tool routing, executable SOPs, loop control and an agent the candidate designed.Covered: Past agent pipelines and model choices, Multi-tool latency and accuracy, SOP design, Autonomous loops and termination, Code-change risk analysis agent

Agent Developer

Outcome not shared

unknown. 1 round. Shared by 小妞脂 on nowcoder, 1970-01-01

1First roundTechnicalInternship grilling plus RAG, backend language and concurrency questions, a DFS coding problem with a trap, and views on AI coding.Covered: Academic ranking, Internship deep dive, RAG pipeline and recall, Chunking, MySQL index failure, Java vs Go for backends, Goroutines vs thread pools, Function calling vs RAG, Java thread pools, DFS problem, AI code review reliability

Embedded Engineer

Outcome not shared

New grad. 1 round. Shared by zllllllllz on nowcoder, 2026-09-14

1First roundTechnicalDeep Linux kernel driver and bus questions, storage stack basics, then a C++ palindrome problem with debugging.Covered: Linux driver loading, Platform drivers and device tree, I2C vs platform registration, UART and packet loss, Block vs character devices, UFS, Longest palindromic substring

Backend Engineer (TikTok Shop)

Outcome not shared

New grad. 1 round. Shared by BCZMJ on nowcoder, 2026-09-14

1Second roundTechnicalMostly internship business and agent evaluation questions, some high-concurrency basics and a counting DP problem.Covered: Internship business goals, Measuring feature impact, Agent platform, Agent evaluation sets, Flash-sale overselling, Cache penetration and Bloom filters, Ring walk counting DP

Backend Engineer (Douyin E-commerce)

Outcome not shared

New grad. 2 rounds. Shared by 苦瓜大王886 on nowcoder, 2026-09-14

1Second roundTake-homeTwo hours to build a procurement request checker with any AI tools, then demo it and answer questions on the agent transcript.Covered: Procurement assistant, Safety and permission checks, JSON output, AI-assisted coding
2Second round (design)System designDesign a leaderboard that also supports lookup by streamer, then casual questions on location and internship.Covered: Streamer gift leaderboard, Redis sorted sets

Test development engineer (Volcano Engine)

Outcome not shared

New grad. 1 round. Shared by Ash_zq on nowcoder, 2026-09-20

1First technical interviewTechnicalQuestions drilled into prior cloud internship projects and AI testing tools.Covered: Cloud IaaS/VPC networking, API test automation, LLM agents and LangGraph, RAG chunking and retrieval, Celery and Django async tasks, SSE with Redis, Debugging 502 errors

Full-stack engineer (China e-commerce and ads)

Outcome not shared

unknown. 1 round. Shared by 风止何安啊 on nowcoder, 2026-09-21

1First interviewTechnicalFrontend concepts, a JS scheduler coding task with timing follow-ups, then project problem-solving.Covered: Vue 3 Composition API, Concurrency-limited async scheduler in JS, Promise timing, SSE reconnection, Streaming partial JSON parsing for tool calls

Backend engineer

Not selected

New grad. 2 rounds. Shared by 墨陨 on nowcoder, 2026-09-21

1Second interview (attempt one)TechnicalProblem shared two hours ahead for an AI-assisted coding session that proved very hard.Covered: AI coding task
2Second interview (attempt two)TechnicalFifty minutes on internship system design plus difficult scenario questions.Covered: Internship architecture, Business scenario questions

Game client developer intern

Outcome not shared

Internship. 1 round. Shared by Comcal on nowcoder, 2026-09-21

1First interviewTechnicalThirty-minute round with one geometry coding problem and heavy project questioning, no fundamentals.Covered: Recent project walkthrough, Uniform random point in a circle, Project deep-dive

Agent full-stack engineer intern (data platform)

Outcome not shared

Internship. 2 rounds. Shared by RyanChen123 on nowcoder, 2026-09-21

1First interviewTechnicalTwenty minutes on internships, agent and networking questions, then a tree coding task.Covered: Internship projects, General agent design, HTTPS end to end, Binary tree right side view
2Second interviewTechnicalLong internship deep-dive plus a trie coding task and agent framework questions.Covered: Internship project, Trie implementation, Network layers, Browser-to-server request path, Skills vs tools, LangChain vs LangGraph, SSE internals

Embedded software engineer

Outcome not shared

New grad. 1 round. Shared by Hasagii on nowcoder, 2026-09-21

1First interviewTechnicalFifty minutes of systems fundamentals with no resume questions, ending with a coding task swapped from hard to medium.Covered: malloc vs kmalloc vs vmalloc, C keywords and unions, Virtual functions and vtables, Interrupts and page tables, Process scheduling and shared memory, Atomics and locks, Coding problem

Frontend engineer

Not selected

New grad. 1 round. Shared by 尺玉 on nowcoder, 2026-09-21

1First interviewTechnicalBroad frontend, networking and LLM application questions ending with a JS scheduler coding task.Covered: Time to first token, TCP congestion control, SSE vs WebSocket, Closures, Browser rendering and caching, CORS, Vite vs webpack, Concurrent token refresh, RAG and Top-K/Top-P, Concurrency-limited async scheduler

Backend developer intern (GMPT)

Not selected

Internship. 2 rounds. Shared by 希望offer多多的小飞象很活泼 on nowcoder, 2026-09-21

1First interviewTechnicalOver an hour mostly on internship work with a parsing coding task.Covered: Internship deep-dive, Redis distributed locks, Goroutine shutdown, TCP flow and congestion control, MVCC, String to float coding
2Second interviewTechnicalProject-only questioning plus a simple string problem.Covered: Project deep-dive, First unique character coding

Frontend engineer

Not selected

New grad. 2 rounds. Shared by 牛客569000128号 on nowcoder, 2026-09-22

1First interviewTechnicalBroad frontend and LLM tooling questions with a publish-subscribe coding task. Passed to round two.Covered: Internship deep-dive, LLM context caching, Function calling and MCP, Flexbox and centering, CSS specificity, Prototype chain and inheritance, Event loop, Cookies vs localStorage, Vue template compilation, Declarative vs imperative, Pub-sub coding
2Second interviewTechnicalCandidate was rejected after this round.

Frontend engineer

Outcome not shared

unknown. 1 round. Shared by ZESHAWN_ on nowcoder, 2026-09-22

1First interviewTechnicalNetworking and Electron questions, an AI coding task, then a deep discussion on steering coding agents.Covered: WebSocket lifecycle and packet loss, TCP loss detection and ping, Electron process architecture, High-frequency SSE token rendering in React, requestAnimationFrame, AI coding for streaming chat state, Keeping AI-generated code on spec

Agent Developer

Outcome not shared

New grad. 1 round. Shared by 吃饱了撑的容器 on nowcoder, 1970-01-01

1First roundTechnicalProject questions on agent memory and update pipelines, a discussion of current agent tooling, brief database basics and two algorithm problems.Covered: Session memory with sliding window and summaries, Idempotent concurrent document updates, Using a message queue for updates, Other agent harnesses, Context compression in coding agents, Computer use, AI coding workflow, Database types and B+ trees, Subtree structure check, Common elements of sorted and unbounded lists

Embedded Software Engineer (PICO headsets)

Not selected

unknown, Shanghai, China. 2 rounds. Shared by 人才库的小白 on nowcoder, 1970-01-01

1First roundTechnicalA dense 55-minute round of C and systems fundamentals with two coding problems.Covered: Data flow in an acquisition project, Pointers vs arrays, Double pointers, Memory leaks and use-after-free, Struct alignment, Floating-point representation, Endianness for image data, Processes vs threads, Stack vs heap for large buffers, Reverse linked list, Merge sorted arrays, Interrupt flow
2Second roundTechnicalA 70-minute deep dive into image pipelines and real-time display latency specific to VR headsets.Covered: Camera-to-display pipeline, MIPI vs parallel interfaces, Zero-copy image transfer, YUV vs RGB, Double and triple buffering, VSync and tearing, Latency sources in headsets, Real-time classes and interrupt latency, Multi-sensor timestamp sync, DMA and cache coherence, Memory bandwidth bottlenecks, Hardest bug

AI Agent Engineer (AI Compute Infrastructure)

Outcome not shared

New grad. 1 round. Shared by 孤飞onefly on nowcoder, 1970-01-01

1InterviewTechnicalSystematic questions on agent runtime infrastructure, then MySQL indexing and a hand-written LRU cache.Covered: Agent loop modules, Agent harness, LangChain vs LangGraph, Agent memory types, MCP and skills, E2B sandboxes, MySQL isolation levels and index types, Unique index with NULLs, Index and composite index failure, LRU cache

VLM Data Operations Intern

Outcome not shared

Internship. 1 round. Shared by a装睿君666 on nowcoder, 2026-09-15

1InterviewHiring managerConversation about the data labeling and operations role and the candidate's level of interest.Covered: Understanding of the role, Motivation

Agent Engineer (Aime)

Outcome not shared

New grad. 1 round. Shared by 27测绘少年不会梦到offer学姐 on nowcoder, 2026-09-15

1First roundTechnicalExtensive agent infrastructure and evaluation questions, OS and HTTP basics, then a full RAG deep dive.Covered: MCP integration, Skill orchestration, Agent loop design, Context overflow handling, Agent evaluation and bad-case attribution, HTTP 5xx codes, Processes vs threads, Page replacement, RAG pipeline and reranking

Client Engineer (Douyin E-commerce)

Outcome not shared

New grad. 1 round. Shared by 想要成为求职高手 on nowcoder, 2026-09-15

1First roundTechnical30 minutes on Java, MySQL and agent concepts, then a 20-minute linked-list coding task chosen over an AI coding option.Covered: Multithreaded export sharding, Deep pagination, Slow query tuning, Thread pool exception handling, Agent streaming responses, Tool calling, MCP vs Skills, Double a number stored in a linked list

Frontend Engineer Intern (Douyin)

Outcome not shared

Internship. 1 round. Shared by Recall_15 on nowcoder, 2026-09-15

1First roundTechnicalAbout 40 minutes probing an agent internship and AI tooling habits, a quick reduce-based map implementation, then JS and TS fundamentals.Covered: Video editing agent internship, LangChain vs LangGraph, Attention, Agent components, Validating impact metrics, SSE vs WebSocket, Spec vs vibe coding, Implement map with reduce, Prototype chain, Promises and async/await, TypeScript any vs unknown

AI R&D Engineer

Not selected

New grad. 1 round. Shared by 纯牛马🐮🐴 on nowcoder, 2026-09-15

1First roundTechnicalInternship evaluation work, database concurrency for a payments scenario, Redis locking and a hard number-building coding problem.Covered: LLM-as-judge evaluation, Isolation levels, Wallet deduction concurrency, Unique indexes, Redis lock expiry and renewal, Largest concatenated number below target

Backend Engineer (International Ads)

Received an offer

New grad. 1 round. Shared by xk_664 on nowcoder, 2026-09-15

1Second roundTechnicalProject discussion, broad Java and Spring internals, MySQL basics and a stock-trading coding problem.Covered: Project deep dive, Nacos architecture, Dynamic proxies, Lambdas and functional interfaces, Log tracing across thread pools, Spring Boot startup and starters, char vs varchar, Slow SQL, Best time to buy and sell stock

Algorithm Engineer Intern (Agent, TikTok Live)

Not selected

Internship. 1 round. Shared by 玛卡巴卡_du on nowcoder, 2026-09-16

1InterviewTechnicalProbing of a multi-agent research project and RL post-training theory with formula derivations, plus two coding tasks.Covered: Availability and motivation, VLM and video understanding, Semantic IDs, Multi-agent code generation project, Benchmarks and ablations, Agent trajectories and credit assignment, DPO, PPO and GRPO formulas, On-policy distillation, Multi-GPU training, Big-number addition, Queue from two stacks

Backend Engineer (Trading)

Outcome not shared

Internship. 1 round. Shared by 批踢踢 on nowcoder, 2026-09-17

1Second roundTechnicalQuestions on internship model selection and data migration consistency, then implementing square root without libraries.Covered: Competitive programming background, Availability, Image and video generation model choices, Hot/cold data migration consistency, Square root via binary search to five decimals

Backend Engineer (Trading)

Outcome not shared

Internship. 1 round. Shared by 批踢踢 on nowcoder, 2026-09-17

1Third roundTechnicalShort resume and motivation questions plus a next-permutation coding problem the candidate struggled with.Covered: Internship overview, AI-assisted frontend delivery, Next permutation, Balancing coursework and internship

Backend Engineer (Trading)

Outcome not shared

Internship. 1 round. Shared by 批踢踢 on nowcoder, 2026-09-17

1First roundTechnicalInternship deep dive followed by networking, Java concurrency and design questions plus a sliding-window coding problem.Covered: Prompt sources and system architecture, Turning unstructured docs into image tasks, Hot/cold data separation, URL to page rendering, Streaming top-K design, ConcurrentHashMap, Lazy singleton, Longest substring without repeats

AI frontend engineer (CapCut)

Outcome not shared

New grad, Shenzhen, China. 1 round. Shared by Oblivion1s on nowcoder, 2026-09-22

1First interviewTechnicalDeep agent-project discussion, frontend performance questions and an LRU coding task.Covered: Custom agent framework and ReAct loop, Malformed tool call handling, Multi-agent decomposition, Loop detection, Context management, SSE reconnection, MCP vs skills, Debugging a stuck agent, React performance and FPS monitoring, Preventing performance regressions, LRU cache coding

Offline data architecture engineer

Outcome not shared

New grad. 2 rounds. Shared by 舟杨波 on nowcoder, 2026-09-23

1First interviewTechnicalFundamentals plus a resilient data pipeline design scenario.Covered: OS memory management, Fault-tolerant LLM training data pipeline design, Medium coding problem
2Second interviewSystem designHard design questions on vector search, Redis clustering and Flink state, with an easy coding task.Covered: Vector index types, Indexing a hundred billion vectors, HNSW layering, Highly available Redis cluster for binary values, Binary tree level-order traversal, Generic-typed tree nodes, Big data components, Managing growing Flink state

Backend engineer

Outcome not shared

New grad. 1 round. Shared by 烦恼的喜羊羊在摸鱼 on nowcoder, 2026-09-24

1First interviewTechnicalCode review and design scenarios alongside internship discussion and one coding task.Covered: Agent internship project and recall quality, Reviewing DB-plus-cache code, One coupon per user without overselling, Transfer code concurrency and transactions, Distributed transactions, Smart customer service design, Number of islands coding, Proactively driven improvements

Recommendation architecture engineer

Outcome not shared

New grad. 1 round. Shared by 烦恼的喜羊羊在摸鱼 on nowcoder, 2026-09-24

1First interviewTechnicalDetailed probing of a latency optimization and caching design, ending with an LCA coding question.Covered: Recall chain parallelization, Per-source thread pools, ThreadPoolExecutor internals and sizing, Timeouts after parallelization, Two-level cache hit rate and consistency, Local cache impact on GC and cold start, AI tooling gaps, Lowest common ancestor with parent pointers

Full-stack engineer (China e-commerce and ads)

Not selected

unknown. 1 round. Shared by 风止何安啊 on nowcoder, 2026-09-24

1Second interviewTechnicalDeep follow-ups on an internship chat UI, LLM tooling and browser and network internals. Rejected.Covered: SSE resume and virtual list design, Tool calling vs MCP, RAG pipeline, retrieval and reranking cost, LangChain vs LangGraph persistence, Event loop output question, defer vs async, Browser rendering and stacking contexts, Compositing layers, HTTP/2 vs HTTP/3 and QUIC, TCP congestion control

Backend developer

Not selected

New grad. 1 round. Shared by 哈基米老师 on nowcoder, 2026-09-28

1Third interviewTechnicalA high-pressure round that kept pushing for plain explanations of internals, ending with an easy coding task.Covered: Internship query-path refactor and latency gains, Elasticsearch pagination consistency, Kafka sequential I/O, zero copy and page cache, Kafka ordered consumption, Servlet container used internally, Matrix transpose

Backend developer (business platform)

Outcome not shared

New grad. 1 round. Shared by 兄弟别回头我是高坚果 on nowcoder, 2026-09-29

1First interviewTechnicalA short chat, one coding problem, then a long run of fundamentals with no internship questions.Covered: Strengths and weaknesses, Learning a new stack, Top K frequent elements, URL-to-render network flow, TCP versus UDP, Scheduling algorithms and processes versus threads, Java thread pool tuning and queue choice, CAS, InnoDB ACID, binlog, redo and undo logs, Redis persistence, data structures and zset internals, AI coding practices

LLM Algorithm Engineer

Outcome not shared

New grad. 1 round. Shared by 算法打工人阿旺 on nowcoder, 2026-10-02

1First roundTechnicalProject choices and LLM training/inference internals, finishing with coding self-attention by hand.Covered: Base model selection, Data strategy, RL algorithms (DAPO vs GRPO), Context compression, Effective context length, Long-horizon agents, FlashAttention, PagedAttention, Implement self-attention

Backend Engineer (LLM development platform, data)

Not selected

New grad. 1 round. Shared by 彩特琳徳 on nowcoder, 2026-10-03

1First roundTechnicalExtended discussion of agent evaluation and RAG design, a scenario on benchmarking a general agent, then two coding tasks.Covered: Agent regression evaluation, RAG chunking vs full-document context, Online vs offline evaluation, Long-horizon agent evaluation, Search intent disambiguation, Agent framework trade-offs, Comparing general agents with competitors, Trie implementation, Merge sorted arrays descending

Backend Engineer

Not selected

New grad. 1 round. Shared by qwerhahaha on nowcoder, 2026-10-03

1First roundTechnicalAgent and RAG project deep dive, OS and concurrency fundamentals, then an interval-scheduling coding problem.Covered: Agent request flow, Manual vs automatic tool execution, Circuit breaking and fail-fast, RAG ingestion and retrieval, Hallucination control, Processes, threads and coroutines, User vs kernel mode, Optimistic vs pessimistic locking, Meeting Rooms II

Backend Engineer

Outcome not shared

New grad. 1 round. Shared by 艾坤日记 on nowcoder, 2026-10-08

1Second roundTechnicalProject deep dive followed by four tasks: ReAct pseudocode, reviewing thread-pool code, deep-pagination tuning and finding the nth prime.Covered: Agent optimization, ReAct pattern, Code review, HashMap internals, Array indexing, MySQL deep pagination, Primes

Agent Developer (Volcano Engine)

Outcome not shared

New grad. 1 round. Shared by DylanTheReal on nowcoder, 2026-10-09

1Second roundTechnicalA coding problem, a networking scenario tracing a curl request, and a detailed whiteboard review of two internship projects.Covered: Longest palindromic substring, Packet path through gateways, Internship architecture on whiteboard, Deployment details, URL loading, ARP

Agent Developer (Volcano Engine)

Outcome not shared

New grad. 1 round. Shared by DylanTheReal on nowcoder, 2026-10-09

1First roundTechnicalLRU coding, designing a simple async storage system, an agent project review and a long run of OS, networking and Redis fundamentals.Covered: LRU cache, Async system without MQ, Agent project design, Processes vs threads, IPC, TCP handshake and congestion control, Reliable UDP, HTTP methods and idempotency, Redis threading and persistence, epoll, Zero copy, MQ backlog

Backend Engineer, China Trading and Ads

Outcome not shared

New grad. 1 round. Shared by 辣条吃多了_ on nowcoder, 2026-10-09

1First roundTechnicalInternship deep dive with detailed follow-ups on Go scheduling, Redis and MySQL, an AI project discussion and one coding problem.Covered: Go GMP scheduler, Go garbage collection and leaks, Redis threading and clusters, MySQL isolation levels, AI project memory system, RAG, LeetCode Hot 100 problem

Agent Developer (Advertising)

Outcome not shared

Experienced. 2 rounds. Shared by 点点去质器 on nowcoder, 1970-01-01

1First roundTechnicalExperience questions, backend fundamentals, a platform design question and one coding problem.Covered: Work experience details, Redis distributed locks, MySQL clustered index, Design an internal skill platform with local runtime, Longest palindromic substring
2Second roundHiring managerA leader round with a flash-sale design, a demo request and a digit-construction coding problem.Covered: Work experience, Using AI to improve efficiency, Design a flash-sale system, Live demo of own project, Skills vs function calling, Largest number below N from a digit set

AI Full-stack Developer (Feishu)

Outcome not shared

New grad. 1 round. Shared by SOLDIER_627 on nowcoder, 1970-01-01

1First roundTechnicalAn hour-long round on two projects, performance tuning scenarios, a big-number addition problem and data-structure questions.Covered: Agent project architecture, Getting agents to follow skill constraints, Video processing pipeline, Avoiding OOM with many long videos, Chunked upload, resume and cleanup, Video storage location, MySQL index structure, Optimizing a slow SQL query, Finding remaining latency after SQL tuning, Caching and concurrency, Big-number string addition, Max and min heaps, HashMap, Consistent hashing

Backend Developer Intern (Douyin E-commerce)

Outcome not shared

Internship. 1 round. Shared by Fu1222 on nowcoder, 1970-01-01

1First roundTechnicalA 47-minute round light on Java trivia, covering availability, AI usage, a shuffle design question and one tree problem. The interviewer signaled a pass.Covered: Internship availability and study-abroad plans, Previous internship, AI tools in daily work, Implementing shuffle (Fisher-Yates), Recursive vs iterative implementations, Binary tree right side view (LeetCode 199) in ACM mode

Agent Developer

Not selected

New grad. 1 round. Shared by AIGC小白入门记 on nowcoder, 1970-01-01

1First roundTechnicalA relentless drill into agent engineering reliability that the candidate failed.Covered: Most complex agent project and architecture, ReAct implementation details, Structured outputs, Invalid tool calls, validation and retries, Tool timeouts, Idempotency key design, Context management over 100+ turns, Context compression and verification, Rollback after lossy compression, Recovering long tasks after restarts

Backend Developer

Not selected

New grad. 6 rounds. Shared by 本质简历挂 on nowcoder, 1970-01-01

1Douyin E-commerce final roundFinalA project-focused final round that the candidate passed, but an executive review rejected the hire.
2Feishu Docs first roundTechnicalA 45-minute mix of project questions and fundamentals with an algorithm and a big-data scenario.Covered: Redis Lua atomicity and rollback, SQL optimization and B+ tree indexes, TCP handshakes and URL-to-render flow, DNS resolution and caching, HTTPS and certificate forgery, CPU and memory alert troubleshooting, First missing positive, Top-10 IDs from tens of TB with 4 GB memory
3Feishu Docs second roundTechnicalA round treated like a generic Java backend grilling. The candidate failed.Covered: Search-related internship work, MySQL architecture, Redis Sentinel and cluster, Go GC and STW, RAG, Flash-sale scenario, Longest substring without repeats
4Volcano Engine agent backend first roundTechnicalA 105-minute deep dive into an auction system project and the candidate's agent research.Covered: Auction platform architecture and permissions, WebSocket rooms and reconnection, Redis Lua bidding and Stream persistence, Redis data structures and ZSet internals, Largest number below N from given digits, Indexing a table queried by time and user, TCP vs UDP and reliable UDP, AI item search and agent design, ReAct vs Plan-and-Execute, LLM-designed heuristics in research
5ByteDance Cloud first roundTechnicalSystems fundamentals and an LRU-with-TTL design the candidate could not finish.Covered: Processes, threads and coroutines, Go GMP, User vs kernel mode and virtual memory, Page fault handling, OSI model, TCP reliability and fast retransmit, Cookies vs sessions and REST, MySQL index internals, LangGraph, skills, Kubernetes and agent sandboxes, LRU cache with TTL
6ByteDance Cloud second roundTechnicalA 68-minute round on consistency and idempotency, ending in rejection for poor fit.Covered: Concurrency control in the auction project, Redis Lua check-and-update, Async persistence to MySQL and idempotent consumers, Settlement consistency and state machines, Idempotency key design, AI coding workflow and live demo, Three threads printing 123 in order, Spurious wakeups, LRU cache with expiry and thread safety

AI Backend Engineer

Outcome not shared

New grad. 1 round. Shared by 明天会有好天气 on nowcoder, 2026-09-18

1Second roundTechnicalLong round covering Java and Redis internals, internship deep dives and two algorithm questions. Feedback was broad but shallow.Covered: int vs Integer, HashMap resizing, JVM GC, Spring IoC and AOP, Redis hash rehashing and persistence, Distributed locks and cache failures, Bloom filters, MQ delayed messages, RAG, Top 10 via heap or quickselect, Reservation system design, Service reliability and gray release, Code generator evaluation, Search in rotated sorted array

Big Data Developer

Outcome not shared

New grad. 1 round. Shared by AAA野生原子弹批发 on nowcoder, 2026-10-10

1First roundTechnicalProbing questions on lakehouse internals and an agent skill for metric queries, with the interviewer pressing for specifics.Covered: Iceberg time travel, Iceberg file layout, Hive storage on HDFS, Warehouse layering and storage savings, Text-to-metrics agent skill, Controlling hallucinated execution paths

Frontend/Agent Developer (Douyin Open Platform, internal transfer)

Outcome not shared

unknown. 1 round. Shared by Jsama on nowcoder, 2026-10-11

1First roundTechnicalAlmost entirely about internship work, a few agent and Vue questions, and coding a state machine that tokenizes bold Markdown.Covered: Custom performance metrics, Resource scheduling optimizations, Regression interception, Intent recognition pipeline, Planner role in agents, Vue reactivity, Agent vs LLM, Tool calling and memory, Finite-state Markdown tokenizer

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