The hottest Substack posts right now

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How VTEX improved the shopper experience with Amazon DynamoDB

VTEX’s Tech Blog • 119 implied HN points • 16 Apr 24
🕹 Technology System Architecture Data Management Cloud Computing Performance optimization E-commerce
  1. VTEX improved their shopping cart system by switching from Amazon S3 to Amazon DynamoDB. This change was made to enhance speed and make the shopping experience better for users.
  2. They faced challenges because some shopping cart items were too large for DynamoDB's limits. To fix this, they reduced the data size and created a process to store bigger items separately in S3.
  3. After gradually migrating to DynamoDB, VTEX achieved a 30% reduction in shopping cart API latency. This helped their overall efficiency and improved customer satisfaction.

The Sequence Radar #779: The Inference Wars and China’s AI IPO Race

TheSequence • 35 implied HN points • 28 Dec 25
🕹 Technology Startups Research Models Hardware AI Markets Data Centers Funding
  1. Nvidia licensed Groq’s LPU technology and brought key Groq leaders onboard, consolidating talent and inference IP to reinforce its lead in inference hardware.
  2. Chinese model labs are shipping frontier models: Zhipu’s GLM 4.7 pushes coding and agentic ‘deep thinking,’ while MiniMax’s M2.1 uses linear attention and MoE to enable a massive 4‑million‑token context window at much lower cost.
  3. Zhipu and MiniMax preparing Hong Kong IPOs shows foundation models are moving from VC-funded research to public, revenue-focused companies, and highlights a split where U.S. scaling is driven by capital and hardware consolidation while China focuses on architectural and economic efficiency.

Infographics: Shadow Cash Trades & Flows

Concoda • 189 implied HN points • 27 Jul 25
💰 Finance Markets Financial Data Economic Trends Trading Investing
  1. The infographic shows how 'shadow cash' trades and flows are organized. This helps to understand hidden financial movements.
  2. Mapping these trades can reveal patterns similar to bonds, which is important for investors to know.
  3. Understanding shadow cash can help people make informed decisions about their investments and see the bigger picture in finance.

The Phantom Menace of the Trump Mobile T1 SmartPhone: Silicon Dreams & Supply Chain Realities

Brad DeLong's Grasping Reality • 261 implied HN points • 17 Jun 25
🕹 Technology Smartphones Media Economics Supply Chain Manufacturing
  1. The Trump Mobile T1 smartphone is less about real technology and more about selling a confidence game. It's surprising how many people are willing to overlook this.
  2. The idea of making a high-spec phone in America for a low price is a fantasy. Real manufacturing takes much more investment and planning than what's being promised.
  3. Many reports about the T1 phone show uncertainty and skepticism. Experts think it's more of a marketing gimmick than a feasible product.
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How much effort is it to create software?

Bite code! • 1590 implied HN points • 06 Mar 24
🕹 Technology Human Interaction Information processing Coding Software Development Tech Tools
  1. Creating software has become easier due to resources and tools available, but it still requires dedication, time, and energy.
  2. Writing software demands perseverance and continuous learning, akin to mastering a musical instrument or a sport.
  3. Working on software involves dealing with humans, extracting requirements, navigating social dynamics, and recognizing the importance of human interaction in the development process.

DeFi: In Simple Photos and How to Make Your First Transaction!

DeFi Education • 3636 implied HN points • 24 Jun 21
🔮 Crypto Technology Investing Finance Blockchain DeFi
  1. Decentralized Finance (DeFi) offers better returns than traditional banking. You can earn more on your investments compared to the low interest rates from banks.
  2. Using decentralized exchanges allows you to trade assets directly with others, cutting out the middlemen like banks. This means you can have more control over your money.
  3. While there are great opportunities in DeFi, be careful as there are many scams. Always research projects and use established protocols to protect your investment.

We went to DevWorld!

Permit.io’s Substack • 179 implied HN points • 01 Mar 24
🕹 Technology Software Development Networking Innovation Conferences
  1. DevWorld conference is a great chance for developers to learn and share ideas. It's also a fun place to meet other tech enthusiasts and see new tools.
  2. Focusing on listening rather than selling at events helps better understand the challenges developers face. Connecting over shared experiences can be more valuable than just making business deals.
  3. There are exciting new tools and products in the developer space like Sentry for monitoring, and Ditto for offline connectivity solutions. These innovations aim to improve developer experiences and make their work easier.

The Software Engineer with Alzheimer's

In My Tribe • 273 implied HN points • 05 Jun 25
🕹 Technology Software Innovation Education Development AI
  1. AI, like Claude, struggles with memory, especially remembering recent conversations. It's important to find ways to manage this limitation to keep projects on track.
  2. Maintaining state is a key challenge for AI development, which affects how well an AI can serve as a personal assistant. This functionality isn't expected to improve quickly.
  3. AI technology can be very useful, and while people may doubt its potential, history shows that dismissing new tech often proves wrong.

Neurotech Notables #6: April 2024

NEUROTECH FUTURES • 119 implied HN points • 15 Apr 24
🕹 Technology Events Neurotech Startups Regulation
  1. Neurotech developments in April 2024 include significant funding for startups like Syntropic, Neurava, and Seaport Therapeutics.
  2. Commercial advancements in neurotechnology involve companies like Synchron, NeuroOne, and Cognito Therapeutics launching new products and making significant progress in their fields.
  3. Regulatory updates show clearances for devices by FDA, submissions like ONWARD Medical's De Novo Application, and the importance of FDA approvals in the neurotech industry.

Who’s Hiring And Paying The Best For Data Roles?

High ROI Data Science • 257 implied HN points • 04 Feb 24
💼 Business Jobs Salaries Career Paths
  1. In times of economic uncertainty, it's crucial to work for companies that offer top compensation, interesting projects, and stability to excel in your career.
  2. Data analysts and mid-level data leaders are facing challenges with salary declines and shifting demands, necessitating reskilling into safer roles like data engineering or AI product management.
  3. Data engineers are still sought after, but the market is becoming more competitive, requiring advanced skills like handling streaming data. AI product managers are in high demand, with lucrative compensation up to $300K.

Language Agent Tree Search — LATS

Cobus Greyling on LLMs, NLU, NLP, chatbots & voicebots • 59 implied HN points • 12 Jun 24
🕹 Technology AI Data Software Automation NLP
  1. The LATS framework helps create smarter agents that can reason and make decisions in different situations. It's designed to enhance how language models think and plan.
  2. Using external tools and feedback in the LATS framework makes agents better at solving complex problems. This means they can learn from past experiences and improve their responses over time.
  3. LATS allows agents to explore many possible actions and consider different options before making a choice. This flexibility leads to more thoughtful and helpful interactions.

Spotlight: Daniel Kleinmann, Daniel Wallman, and Phil Scully - Partners @ Balerion Space Ventures

Space Ambition • 359 implied HN points • 17 Nov 23
💼 Business Investing Technology Space Economy Startups Venture Capital
  1. The space industry is quickly growing, with many new companies starting up. This offers a great chance for investment in exciting projects that can help us explore and use space.
  2. Investors like Balerion VC focus on specific areas within space tech, such as satellites and space tourism. They want a mix of investments to cover all important sectors of the space economy.
  3. For anyone looking to invest in space, building a strong network is key. It's important to make helpful connections and relationships in the space community.

Hume in Hell (UNLOCKED)

Philosophy for the People w/Ben Burgis • 758 implied HN points • 01 Jan 23
📖 Philosophy History Religion Ethics Morality Free will
  1. David Hume's essays on suicide and the afterlife delve into questioning common beliefs even when granting believers' core premises.
  2. Hume challenges the concept of suicide as a sin against God, arguing that humans cannot disrupt God's plan or transgress against it through suicide.
  3. The essays lead to a broader reflection that morality should be grounded in human considerations, not divine commands, opening up a secular perspective in philosophy.

Getting the product on the hands of customers ♥️

André Casal's Substack • 19 implied HN points • 07 Aug 24
💼 Business Startups Entrepreneurship Technology Marketing Product Development
  1. It's important to get feedback from both experienced and beginner developers to improve the product. This will help make the product easier for everyone to use.
  2. The landing page needs continuous updates based on feedback to better attract potential users.
  3. Preparing for a launch on platforms like Product Hunt involves creating promotional content and a support network to maximize visibility and impact.

What Are Companies Doing With Generative AI? A Tale Of 3 Strategies.

High ROI Data Science • 297 implied HN points • 12 Jan 24
🕹 Technology E-commerce Strategy Data Retail AI
  1. Companies are using Generative AI tools to decrease training times and improve customer service in retail.
  2. Some companies are implementing Generative AI without a clear business problem statement, leading to undefined outcomes.
  3. Retailers like Walmart are strategically using Generative AI to change customer workflows, improve online shopping experiences, and increase revenue.

Cracking the consumer investing code: High-risk, high-reward 

Next Big Teng • 216 implied HN points • 05 Feb 24
💼 Business Entrepreneurship Venture Capital Market Dynamics Investing
  1. Consumer investing is high-risk, high-reward, with potential for astonishingly large upside.
  2. There has been a shift over the past decade with consumer companies now accounting for less unicorn club value.
  3. In consumer investing, the top companies dominate the market, making little room for error but offering potential for significant returns.

NCR PC4i

Computer Ads from the Past • 640 implied HN points • 23 Dec 24
🕹 Technology History Computers Ads Reviews Hardware
  1. NCR started as a cash register company and later moved into computing technology after World War II. They became known for their robust computers like the PT4 and PC4i, which were designed to compete with IBM.
  2. The NCR PC4i was praised for its durability and good build quality, making it suitable for heavy computer use. It was not portable, weighing 50 pounds, but offered performance and exceptional compatibility with existing software.
  3. NCR provided excellent customer support for their computers and included user-friendly software with detailed documentation, making their machines accessible for users.

Data Science Weekly - Issue 536

Data Science Weekly Newsletter • 179 implied HN points • 01 Mar 24
🕹 Technology Data science Statistics Programming Machine Learning AI
  1. The DSPy framework makes working with large language models easier by focusing on programming instead of complex prompting techniques. This helps reduce errors and improves usability.
  2. A new sequence model approach shows better performance than traditional Transformers, especially for long data sequences. It also works faster, making it a promising development in the field.
  3. Learning resources like online courses and free books on deep learning and causal ML can help deepen understanding of data science. They provide structured material that is great for both beginners and advanced learners.

Netflix to Acquire Warner Bros. Discovery in $72 Billion Deal

philsiarri • 44 implied HN points • 08 Dec 25
💼 Business Labor Antitrust Streaming Media Mergers Entertainment
  1. Netflix is buying Warner Bros. Discovery’s film, TV, and streaming assets (including HBO and DC) in a roughly $72 billion deal, creating a massive global streaming powerhouse.
  2. The merger will face heavy regulatory and union scrutiny and could be challenged over antitrust concerns, potential job losses, and reduced bargaining power for creators.
  3. If approved, consumers might need fewer subscriptions but could face higher prices and less content diversity, and the deal signals a major shift toward streaming dominance in Hollywood.

Rethinking Problem-Solving: From Space Pens to Pencils and Beyond

Wisdom over Waves • 79 implied HN points • 21 May 24
🕹 Technology Problem Solving Innovation User Experience Software Development
  1. Focus on the problem first: Understand the core issue before jumping into solutions. This can lead to more innovative and effective outcomes.
  2. Avoid getting lost in the technical details: Developers should balance focusing on implementation with considering broader business needs and goals.
  3. Collaborate and empathize: Work closely with other teams, seek feedback, and put yourself in the shoes of the end user to improve problem-solving and innovation.

The Philosopher's Tarot: Nietzsche vs. Nihilism

Outlandish Claims • 79 implied HN points • 21 May 24
📖 Philosophy Philosophical Concepts Tarot Nihilism Mythology
  1. Tarot can be used as a tool for generating random writing prompts and exploring philosophical concepts.
  2. Nietzsche, often associated with nihilism, actually aimed to lead people beyond nihilism towards new values and freedom.
  3. Nietzsche's philosophy is often misunderstood due to misinterpretations and misappropriations by others, like the Nazis.

Don't track LTV/CAC; Instead track LTV/CACD, Why? | VC Remote Jobs & More

Venture Curator • 259 implied HN points • 09 Jan 24
💼 Business Venture Capital Customer Acquisition Investors Business Growth Startups
  1. Successful startups track LTV/CACD instead of LTV/CAC for better insight into customer acquisition efficiency and sustainability.
  2. The cost of attracting a new customer should be lower than the value extracted from that customer; all customers are not equal, and tracking LTV/CAC by customer cohort can help optimize customer acquisition efforts.
  3. Investors focus on the velocity with which invested acquisition costs come back as lifetime value; tracking LTV/CACD, with 'D' for 'doubled,' provides a better understanding of return on investment in a shorter time period.

Is the market really saturated?

Kenny’s Sub • 239 implied HN points • 21 Jan 24
💼 Business Work Culture Freelancing Economics Personal Development Entrepreneurship
  1. Blaming external factors for challenges is just a way to avoid taking responsibility. It's important to focus on what you can control to improve your situation.
  2. The difference between blame and responsibility matters a lot. Instead of making excuses about the economy or competition, focus on the steps you can take to move forward.
  3. A positive mindset and determination can help you overcome tough circumstances. Hard work and grit can lead to success, even when the odds seem against you.

Our community round has opened—let's fund this book!

The Novelleist • 282 implied HN points • 29 May 25
💼 Business Capitalism Economics Publishing Crowdfunding Investment
  1. The community funding round for the book 'We Should Own The Economy' has opened, allowing readers to invest and share in potential profits.
  2. They have already raised almost $60,000 and invite everyone to confirm their investments through a provided link.
  3. There's an open call tonight where participants can ask questions about the book and contribute ideas on how to shape the future of capitalism.

Last Call to Save 25% on Your Subscription

Common Sense with Bari Weiss • 695 implied HN points • 01 Dec 24
💼 Business Marketing Subscriptions Promotions Sales Journalism
  1. You can get a 25% discount on an annual subscription to The Free Press, which costs $60.
  2. The subscription offers full access to articles, investigations, and popular columns, as well as the chance to join discussions in the comments.
  3. Subscribers will also get early access to tickets for special events, including debates and book talks.

[2025–2026] Week 15: John Neff on Investing

Behavioral Value Investor • 14 implied HN points • 30 Jan 26
💰 Finance Investment strategy Portfolio Management Behavioral Finance Stock Valuation Value investing
  1. Study John Neff’s approach by mapping his investment style, linking it to his background, and evaluating specific examples and modern stock ideas using the six guided questions.
  2. Great investors leverage a personal knowledge edge and apply a broad set of strategies—stalwarts, cyclicals, turnarounds, and long-term growers—using simple, clear theses rather than overcomplicated models.
  3. Use a disciplined, time-efficient routine like a weekly 10-minute investment autopsy to systematically dissect real decisions and steadily improve your investing process.

Dario Amodei + DeepSeek’s New Burdens

ChinaTalk • 518 implied HN points • 06 Feb 25
🕹 Technology Geopolitics Business Models Government Relations AI
  1. DeepSeek is facing challenges in managing corporate partnerships while maintaining its research-focused culture. They might have to balance getting support from big tech companies with staying true to their values.
  2. As DeepSeek becomes more popular, it risks losing its talented employees to other companies offering better pay. This could change the company's culture and innovation approach.
  3. If DeepSeek forms closer ties with the Chinese government, they could get funding and resources, but it may come with scrutiny and reduced independence. They need to navigate these relationships carefully.

🏎 Aston Martin of Scooters

The Micromobility Newsletter • 432 implied HN points • 13 Jun 23
💼 Business Market Expansion Funding Industry Trends Micromobility
  1. Micromobility Europe showcased innovative micromobility products and concepts, like the Hilo One electric scooter with advanced features.
  2. The industry is seeing collaborations and advancements like Segway's partnership to bring advanced rider assistance systems to their scooters.
  3. There is a growing trend towards sustainable and efficient micromobility solutions, such as universal charging stations and swappable batteries.

O governo surfa na competência do Banco Central que apedreja

O Observador de Corcyra • 432 implied HN points • 03 Jul 23
💼 Business Government Monetary Policy Finance Central Bank Economics
  1. The global economy in 2023 is influenced by fiscal and monetary actions taken during the pandemic, leading to low unemployment rates and strong consumer spending.
  2. Adjustments in monetary policies by central banks since 2021 have helped moderate inflation, especially in goods, and sustain economic activity without indicating a global recession in 2023.
  3. The independence of the Central Bank has allowed for the implementation of correct monetary policies, contributing to the consistent economic performance of Brazil and the potential for future organized monetary relaxation.

446: ICE + Black Knight + Constellation, Meta, ARM IPO, Starlink & Cloudflare, Toyota, Novo Nordisk, Exoplanets, and Flipside

Liberty’s Highlights • 432 implied HN points • 13 Sep 23
💼 Business Film Acquisitions Nuclear power Astronomy Technology
  1. Vacations are a skill that take practice to unwind and recharge.
  2. Meeting online friends in person can enhance relationships and bring new perspectives.
  3. Partnerships between companies like Cloudflare and Starlink aim to improve services for customers.