Full-Time

Research Scientist in LLM Foundation Models - Reasoning

Planning & Agent, Seed-LLM

Posted on 2/13/2025

ByteDance

ByteDance

10,001+ employees

Runs global short-video platforms with ads

No salary listed

Company Does Not Provide H1B Sponsorship

San Jose, CA, USA

In Person

Category
AI & Machine Learning (1)
Required Skills
LLM
Python
Neural Networks
REST APIs
C/C++
Computer Vision

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Requirements
  • Proficiency in research experience with RL, LLM, CV and familiarity with large-scale model training
  • Proficiency in data structures, and fundamental algorithm skills, fluency inC/C++ or Python, winners of competitions such as ACM/ICPC, IOI, TopCoder etc.
  • Experience with influential projects or papers in RL, NLP, deep learning
  • Excellent problem analysis and solving skills, able to deeply solve problems in large-scale model training and application
  • Good communication and collaboration skills, able to explore new technologies with the team and promote technological progress.
Responsibilities
  • Reasoning and planning for foundation models. Enhance reasoning and planning throughout the entire development process, encompassing data acquisition, model evaluation, pretraining, SFT, reward modeling, and reinforcement learning, to bolster overall performance.
  • Synthesize large-scale, high-quality (multi-modal) data through methods such as rewriting, augmentation, and generation to improve the abilities of foundation models in various stages (pretraining, SFT, RLHF).
  • Solve complex tasks via system 2 thinking, leverage advanced decoding strategies such as MCTS, A*.
  • Investigate and implement robust evaluation methodologies to assess model performance at various stages, unravel the underlying mechanisms and sources of their abilities, and utilize this understanding to drive model improvements.
  • Teach foundation models to use tools, interact with APIs and code interpreters. Build agents and multi-agents to solve complex tasks.

ByteDance runs a global family of content platforms, including Toutiao, Douyin, TikTok, Helo, and Lark, that inform, entertain, and inspire users across many languages and regions. Each platform surfaces user-generated content through a recommendation algorithm that personalizes feeds to keep people engaged. It primarily earns money from advertising, with additional income from in-app purchases and partnerships. The company stands out by offering multiple products with strong short-form video focus and global localization to reach diverse audiences, aiming to grow users and sustain advertising-driven revenue.

Company Size

10,001+

Company Stage

Debt Financing

Total Funding

$35.1B

Headquarters

Haidian, China

Founded

2012

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Simplify Jobs

Simplify's Take

What believers are saying

  • Reuters on September 4, 2026 said lenders oversubscribed ByteDance's $29.6 billion unsecured facility.
  • TikTok Shop drove overseas revenue above 30% in 2025, per Caixin sources.
  • ByteDance plans 5–6GW Inner Mongolia capacity by early 2028, scaling compute aggressively.

What critics are saying

  • EU regulators charged TikTok July 24, 2026, threatening fines up to 6% turnover.
  • The U.S. law still forces divestiture pressure; any deal collapse risks a nationwide TikTok ban.
  • Aggressive AI spending crushed 2025 profit 70%, and another funding squeeze hits 2027.

What makes ByteDance unique

  • TikTok USDS JV finalized January 2026 preserves ByteDance's algorithmic expertise under American ownership.
  • Doubao, Feishu, and Volcano Engine merged July 30, 2026 into a sharper AI stack.
  • ByteDance's 2026 loan-backed AI buildout funds overseas data centers, especially Southeast Asia.

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Benefits

Hybrid Work Options

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

-1%

2 year growth

0%
Toscale
Sep 4th, 2026
ByteDance secures $29.6 billion unsecured loan as AI capex rivals Bitcoin (BTC) for capital.

ByteDance secures $29.6 billion unsecured loan as AI capex rivals Bitcoin (BTC) for capital. ByteDance has secured a $29.6 billion unsecured loan from nearly 30 banks led by Citigroup and JPMorgan. The final amount lifted exceeds the initial target of $20 billion, reflecting strong demand for the financing. The capital is intended to fund overseas AI infrastructure development as the company's spending on artificial intelligence rivals that of Bitcoin (BTC) in terms of scale. ByteDance was founded in 2012 by a team led by Yiming Zhang and Rubo Liang. The company identified opportunities in the then-nascent mobile internet market, eventually growing into a global technology giant. Its mission is to "Inspire Creativity, Enrich Life." At ByteDance, corporate values are referred to as "ByteStyles," which guide how employees work together and bring the company's mission and vision to life. These values include "Grow Together," encouraging patience and resilience in the face of short-term fluctuations while solving problems together; "Always Day 1," maintaining an entrepreneurial mindset and rejecting complacency; "Champion Diversity and Inclusion," focusing on individual differences and assuming good intent; "Be Candid and Clear," speaking one's mind and avoiding jargon; "Seek Truth and Be Pragmatic," being an independent thinker grounded in real impact; and "Be Courageous and Aim for the Highest," daring to take calculated risks with a focus on return on investment. According to Wikipedia, ByteDance is a Chinese Internet technology company. It was founded on March 13, 2012. The company's revenue reached US$155 billion in 2024, with overseas sales jumping despite US hurdles. Net income is projected to be US$50 billion in 2025. Key people associated with the company include founder and chairman

VnExpress
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Malaysia's richest man Robert Kuok's grandson officially takes over as PPB Group managing director.

Malaysia's richest man Robert Kuok's grandson officially takes over as PPB Group managing director. Kuok Meng Xiong, a grandson of Malaysia's top billionaire Robert Kuok, has formally assumed the role of group managing director at the tycoon's conglomerate PPB Group. Meng Xiong took over from Lim Soon Huat, who has retired from the board after nearly two decades with the group, PPB said in a statement on Tuesday. Lim remains an adviser to the board. "PPB Group has strong foundations built over many decades," Meng Xiong, 45, said in the statement. "My commitment is to build on these strengths, work closely with our people and continue creating sustainable long-term value for our stakeholders." He was named to the position in early June, around the same time his cousin Jeremy Goon became PPB's non-independent non-executive director. Goon has since assumed the role of executive director and will work closely with Meng Xiong, PPB said in the Tuesday statement. | Kuok Meng Xiong, group managing director of PPB Group. Photo from the company's website | Part of the Kuok family's third generation, Meng Xiong earned a bachelor's degree in hotel administration from Cornell University in the U.S. before starting his career at Shangri-La Hotels, the luxury hospitality chain founded by his grandfather, where he oversaw hotel operations, project development and expansions, according to The Business Times. He also founded Singapore-based venture capital firm K3 Ventures, which has invested in dozens of startups including TikTok's parent ByteDance and ride-hailing and food delivery platform Grab. Additionally, he is the managing director of Kuok Brothers, his grandfather's privately held investment vehicle. Robert Kuok, 102, has been Malaysia's richest man for decades, according to Forbes, which put his fortune at US$13.1 billion as of Sept. 3. He built his fortune initially through commodities trading, earning the nickname "Sugar King of Asia," before branching out into various industries. Shangri-La, which he founded, has more than 100 hotels and resorts globally while PPB, also part of his empire, operates across a diverse range of businesses, spanning grains and agribusiness, consumer products, property, film exhibition and distribution, waste management and information technology. PPB posted a 13% year-on-year drop in net profit to RM572 million (US$141.6 million) for the first half of 2026 as revenues fell 4% to RM2.6 billion.

Computing
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India's agentic AI payment plans - Asian Tech Roundup.

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Tech in Asia
Sep 3rd, 2026
ByteDance plans 5-6GW data centre in Inner Mongolia amid China's AI infrastructure race

ByteDance is planning to build a 5–6GW data centre cluster in Jining district, Inner Mongolia, according to sources. The area already hosts projects from Huawei Technologies, Kuaishou, Alibaba Group Holding, and Apple. Ulanqab attracts large-scale data centre construction due to low-cost power, available land, and national policy encouraging computing workloads to shift from eastern cities to energy-rich northern and western regions. Inner Mongolia's wind and solar capacity creates periods of excess renewable power supply, which officials hope data centres will absorb. ByteDance recently secured a reported $29.6 billion bank loan. The development aligns with China's broader AI infrastructure expansion, with Alibaba reportedly considering up to $69 billion in AI data centre spending over three years.

Bloomberg
Sep 3rd, 2026
ByteDance secures $29.6B loan, Asia's second-largest dollar borrowing this year

ByteDance, the company behind TikTok, has secured a $29.6bn loan, making it Asia's second-largest dollar-denominated borrowing this year, according to sources familiar with the matter. The substantial financing marks a significant capital raise for the social media giant amid ongoing global scrutiny of its operations. However, the sources did not disclose details about the loan's terms, intended use, or the financial institutions involved in the deal. The loan's size positions it as one of the year's most notable corporate financing transactions in the region, reflecting ByteDance's continued access to substantial capital despite regulatory challenges in various markets.

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