Fintech Engineering Handbook
Fintech Engineering Handbook Patterns for building software that handles money Welcome to the Fintech Engineering Handbook. This resource aims to describe the most important patterns used in software engineering, where money is the primary focus of the system. It can be read in full to get a comprehensive understanding or in parts when dealing with a particular problem. For whom? People joining fi
初めに 昨日のアップデートでAWS Lambdaは実行結果の返却値を一括の応答ではなくストリーミングな徐々に応答するようなことが可能となりました。 いざ日本語に直そうとすると微妙に難しいタイトルで実際の公式の翻訳がどうなるか次第では少しタイトルを調整するかもしれません。 これまでの方式ではLambdaの機能としては処理完了まで返却値を返すことができず、そういった機能が必要な場合はWebSocket等別の手段をユーザ側で実装する必要がありました。 今回のアップデートではTransfer-Encoding: chunked形式による返却に対応しHTTP/1.1の仕様の範囲内で徐々に値を返却できるようになりました。 またこの方式は応答サイズの上限が従来の6MBではなく20MBまでの対応となるためより大きなレスポンスを返すことができるようです。 Configuring a Lambda funct
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How modern browsers work
Note: For those eager to dive deep into how browsers work, an excellent resource is Browser Engineering by Pavel Panchekha and Chris Harrelson (available at browser.engineering). Please do check it out. This article is an overview of how browsers work. Web developers often treat the browser as a black box that magically transforms HTML, CSS, and JavaScript into interactive web applications. In tru
Every System is a Log: Avoiding coordination in distributed applications | Restate
BlogEvery System is a Log: Avoiding coordination in distributed applications Building resilient distributed applications remains a tough challenge. It should be possible to focus almost entirely on the business logic and the complexity inherent to the domain. Instead, you need to review line-by-line and check: “what if the service crashes here?”, “what if the API we call here is temporarily unavai
Introducing AWS Lambda response streaming | Amazon Web Services
AWS Compute Blog Introducing AWS Lambda response streaming Today, AWS Lambda is announcing support for response payload streaming. Response streaming is a new invocation pattern that lets functions progressively stream response payloads back to clients. You can use Lambda response payload streaming to send response data to callers as it becomes available. This can improve performance for web and m
Update 1.69.1: The update addresses these issues. Update 1.69.2: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the June 2022 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key highlights include: 3-way merge editor - Resolve merge conflicts wit
CUPID: for joyful coding
What started as lighthearted iconoclasm, poking at the bear of SOLID, has developed into something more concrete and tangible. If I do not think the SOLID principles are useful these days, then what would I replace them with? Can any set of principles hold for all software? What do we even mean by principles? I believe that there are properties or characteristics of software that make it a joy to
(This is Part II of the Faster Ruby posts, which started with a retrospective on Ruby+OMR, a Ruby JIT compiler I worked on five years ago) As someone who comes from a compiler background, when asked to make a language fast, I’m sympathetic to the reaction: “Just throw a compiler at it!”. However, working on SpiderMonkey, I’ve come to the conclusion that a fast language implementation has many movi
Effective TypeScript › The Saga of the Closure Compiler, and Why TypeScript Won
Here's something that makes me feel old: in just six months, Gmail will celebrate its 20th anniversary. If you weren't actively developing web sites at the time, it's hard to capture just how revolutionary it was. This was a time when JavaScript was held in almost universally low regard. The idea that you could build a sophisticated web app using it was mind-boggling. But it clearly worked and it
What’s New in Emacs 31.1? Emacs 31.1 adds a slew of quality-of-life features. It retires its quirky unexec dumper; there are general improvements to tree-sitter, including a much-wanted auto-installer for grammars; and much more. Emacs 31.1 is finally out! Unlike earlier Emacs versions, there is not a singular big-bang feature in this release. From what I could gather, the new garbage collector wa
The GitHub Copilot CLI, GitHub Copilot app, and GitHub Copilot SDK are all backed by the Copilot agent runtime, an agentic harness that can be embedded into applications and services. It was originally written in TypeScript on Node.js and the V8 JavaScript engine for what is now the GitHub Copilot cloud agent (CCA), and the runtime stayed on that stack as the runtime and its capabilities grew rapi
How to improve Python packaging, or why fourteen tools are at least tw
There is an area of Python that many developers have problems with. This is an area that has seen many different solutions pop up over the years, with many different opinions, wars, and attempts to solve it. Many have complained about the packaging ecosystem and tools making their lives harder. Many beginners are confused about virtual environments. But does it have to be this way? Are the current
A new JavaScript backend was merged into GHC on November 30th, 2022! This means that the next release of GHC will be able to emit code that runs in web browsers without requiring any extra tools, enabling Haskell for both front-end and back-end web applications. In this post, we, the GHC DevX team at IOG, describe the challenges we faced bringing GHCJS to GHC, how we overcame those challenges, and
Amazon Web Services ブログ AWS Lambda レスポンスストリーミングの紹介 本記事は、Introducing AWS Lambda response streaming の翻訳です。 本日 (2023年4月7日)、AWS Lambda はレスポンスペイロードストリーミングのサポートを発表しました。レスポンスストリーミングは、関数がレスポンスペイロードを段階的にクライアントに返すことができる新しい呼び出しパターンです。 Lambda のレスポンスペイロードストリーミングを使用すると、レスポンスデータが利用可能になった時点で呼び出し元にデータを送信することができます。これにより、Web アプリケーションやモバイルアプリケーションのパフォーマンスを向上させることができます。また、レスポンスストリーミングによって、より大きなペイロードを返す関数や、進捗状況を段階的に報告し
The Go Programming Language and Environment – Communications of the ACM
Go is a programming language created at Google in late 2007 and released as open source in November 2009. Since then, it has operated as a public project, with contributions from thousands of individuals and dozens of companies. Go has become a popular language for building cloud infrastructure: Docker, a Linux container manager, and Kubernetes, a container deployment system, are core cloud techno
By Jun He, Natallia Dzenisenka, Praneeth Yenugutala, Yingyi Zhang, and Anjali Norwood TL;DRWe are thrilled to announce that the Maestro source code is now open to the public! Please visit the Maestro GitHub repository to get started. If you find it useful, please give us a star. What is MaestroMaestro is a horizontally scalable workflow orchestrator designed to manage large-scale Data/ML workflows
MAI-Thinking-1: Building a Hill-Climbing Machine The Microsoft AI Team 1 Abstract Progress in AI is driven not by a single model, but by the ability to continually improve upon the current state of models. Achieving this requires treating model development as a system-level optimization problem, for which the solution is building a hill-climbing machine for rapid improvement. Our process includes
Tier 4 Support § Support for these targets is entirely experimental. If this target is provided by LLVM, LLVM may have the target as an experimental target, which means that you need to use Zig-provided binaries for the target to be available, or build LLVM from source with special configure flags. zig targets will display the target if it is available. This target may be considered deprecated by
V Language Review (2022)
V is a programming language promising to be “Simple, fast, safe, compiled. For developing maintainable software.” V has a controversial past but what is the state of V in 2022? Is V worth checking out? In this post, we’ll take a look at V as it exists in May 2022. TLDR Read the summary Rules of engagement I’ll be using the current version of V built from git which is 50ab2cfd1ae02d4f4280f38c60b8db
Press Enter, and JHipster will create your app in the current directory and run npm install to install all the dependencies specified in package.json. Verify Everything Works with Cypress and KeycloakWhen you choose OAuth 2.0 and OIDC for authentication, the users are stored outside of the application rather than in it. You need to configure an identity provider (IdP) to store your users and allow
WebKit Features in Safari 18.2
Dec 9, 2024 by Jen Simmons, Ada Rose Canon, David Degazio, Yoel Hawa, Etienne Segonzac, and John Wilander ContentsCSSSpatial videos and photosWebXRGenmojiMediaHTMLWebAssemblyWeb APIJavaScriptSecurity and PrivacyWeb InspectorWebDriverWKWebViewBug Fixes and moreUpdating to Safari 18.2Feedback Today marks the arrival of Safari 18.2. With it, WebKit adds 61 new features and 111 resolved issues. Highli
Try Mastering Emacs for free! Are you struggling with the basics? Have you mastered movement and editing yet? When you have read Mastering Emacs you will understand Emacs. It’s that time again: there’s a new major version of Emacs and, with it, a treasure trove of new features and changes. Notable features include the formal inclusion of native compilation, a technique that will greatly speed up y
Develop Cross-Platform CLI and GUI Tools With Tcl/Tk. Powerful, Event-Driven, Open-Source And Future-Proof Toolkit… From the Past?! - CGI Coffee
Develop Cross-Platform CLI and GUI Tools With Tcl/Tk. Powerful, Event-Driven, Open-Source And Future-Proof Toolkit… From the Past?! What if I told you there exists a language, or a whole toolkit that: Can be used to create cross-platform Console and GUI tools or apps Those GUI apps look native on Windows, Linux and macOS Supports safe and efficient threading, non-blocking events and I/O Has a smal
SpringShell RCE vulnerability: Guidance for protecting against and detecting CVE-2022-22965 | Microsoft Security Blog
April 11, 2022 update – Azure Web Application Firewall (WAF) customers with Regional WAF with Azure Application Gateway now has enhanced protection for critical Spring vulnerabilities – CVE-2022-22963, CVE-2022-22965, and CVE-2022-22947. See Detect and protect with Azure Web Application Firewall (Azure WAF) section for details. On March 31, 2022, vulnerabilities in the Spring Framework for Java we
PowerPoint プレゼンテーション
© 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved. © 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved. AWS Webinar https://amzn.to/JPWebinar https://amzn.to/JPArchive Solutions Architect Amazon API Gateway [AWS Black Belt Online Seminar] © 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved. ❏ ❏ ❏ Amazon API Gateway AWS Cloud9 © 2019,
The Alkyne GC · mcyoung
Alkyne is a scripting language I built a couple of years ago for generating configuration blobs. Its interpreter is a naive AST walker1 that uses ARC2 for memory management, so it’s pretty slow, and I’ve been gradually writing a new evaluation engine for it. This post isn’t about Alkyne itself, that’s for another day. For now, I’d like to write down some notes for the GC I wrote3 for it, and more
Large Text Compression Benchmark Matt Mahoney Last update: Mar. 25, 2026. history This competition ranks lossless data compression programs by the compressed size (including the size of the decompression program) of the first 109 bytes of the XML text dump of the English version of Wikipedia on Mar. 3, 2006. About the test data. The goal of this benchmark is not to find the best overall compress
Best practices to optimize data access performance from Amazon EMR and AWS Glue to Amazon S3 | Amazon Web Services
AWS Big Data Blog Best practices to optimize data access performance from Amazon EMR and AWS Glue to Amazon S3 June 2024: This post was reviewed for accuracy and updated to cover Apache Iceberg. June 2023: This post was reviewed and updated for accuracy. Customers are increasingly building data lakes to store data at massive scale in the cloud. It’s common to use distributed computing engines, clo
Twitter formerly known as X, a strange experience. It is the place where only the coolest of kids hang or so they say. The cool kids idle away their time smelling farts and fart like opinions. Sometimes I add my own to the mix but I usually lurk in the corners marinating in the warm miasma. Not all flatulence is created equal. Some, is rather nice, interesting even, and dare I say it can be quite
Why I avoid async/await
EDIT: I recently turned this article into a talk I gave at UtahJS 2023. It’s also partly a response to some of the reactions I got to this article. In many ways, I feel like I did a bit of a better job with my arguments there than here. Let me know what you think. Whatever your stance on async/await, I’d like to pitch to you on why, in my experience, async/await tends to make code more complicated
This isn’t another AI-generated blog post about generic security practices. It contains detailed instructions on protecting Node.js applications from supply-chain attacks and describes best practices for security in any programming language. According to the GitHub report, The state of open source and rise of AI in 2023, JavaScript and TypeScript are the #1 and #3 most popular languages hosted on
Hash functions are incredibly neat mathematical objects. They can map arbitrary data to a small fixed-size output domain such that the mapping is deterministic, yet appears to be random. This “deterministic randomness” is incredibly useful for a variety of purposes, such as hash tables, checksums, monte carlo algorithms, communication-less distributed algorithms, etc, the list goes on. In this art
Written by ettolrach, 2026-09-08. This article uses JavaScript to render maths and to load comments. I don't use it for anything else, so I would appreciate it if you could activate JavaScript for this page :) No LLMs were used to write this blog post. Rust recently stabilised the never type (waffle, 2026) which is also called !. Although you could use ! for function return types before, you could
The sad state of property-based testing libraries Posted on Jul 2, 2024 Property-based testing is a rare example of academic research that has made it to the mainstream in less than 30 years. Under the slogan “don’t write tests, generate them” property-based testing has gained support from a diverse group of programming language communities. In fact, the Wikipedia page of the original property-bas
Safe C++
1 Introduction 1.1 The call for memory safety Over the past two years, the United States Government has been issuing warnings about memory-unsafe programming languages with increasing urgency. Much of the country’s critical infrastructure relies on software written in C and C++, languages which are very memory unsafe, leaving these systems more vulnerable to exploits by adversaries. Nov. 10, 2022
News
Logback components written for logback 1.2 should work without change in version 1.3. However, Joran, logback's configuration system, has been rewritten to use an internal representation model which can be processed separately. Thus, code depending on Joran needs to be adapted to changes in Joran (logback's internal configuration mechanism). As a result of enhancements to Joran, logback configurat
How to Write Meta Descriptions | Google Search Central | Documentation | Google for Developers
SEO fundamentals Introduction Search Essentials SEO Starter Guide Optimizing for generative AI search How Google Search Works Do you need an SEO? Crawling and indexing Sitemaps robots.txt Meta tags Crawler management Removals Canonicalization Redirects JavaScript SEO Ranking and search appearance Visual Elements gallery Title links Snippets Images Videos Structured data Favicons Site-specific guid
Introduction: These Aren’t the JSONs You’re Looking For JSON (JavaScript Object Notation) was designed as a simple, lightweight, and human-readable data interchange format, often positioned as a more accessible alternative to XML. It has become the de facto standard for web APIs and system integration. However, while the specification itself is straightforward, different programming languages and
This is the first part of my series; the other parts are Java 25’s new CPU-Time Profiler: The Implementation (2) Java 25’s new CPU-Time Profiler: Queue Sizing (3) Java 25’s new CPU-Time Profiler: Removing Redundant Synchronization (4) Back to the blog post: More than three years in the making, with a concerted effort starting last year, my CPU-time profiler landed in Java with OpenJDK 25. It’s an
NoSQL Database Interview Questions for Experienced Candidates
Here is a list of common NoSQL interview questions with detailed answers for experienced NoSQL Database professionals. Through advanced queries about architecture, optimization, and real-world problem-solving in NoSQL environments, such interviews aim to gauge the candidate’s ability to understand the complexities of NoSQL databases in scalable, high-performance applications. In such interviews, o
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[アップデート]AWS Lambdaでストリーミングな応答が可能になりました | DevelopersIO
June 2022 (version 1.69)
Faster Ruby: Thoughts from the Outside — Matthew Gaudet
What's New in Emacs 31.1?
Migrating the GitHub Copilot runtime to Rust, using Copilot
JavaScript backend merged into GHC | IOG Engineering
AWS Lambda レスポンスストリーミングの紹介 | Amazon Web Services
Maestro: Netflix’s Workflow Orchestrator
MAI-Thinking-1: Building a Hill-Climbing Machine
0.10.0 Release Notes ⚡ The Zig Programming Language
Full Stack Java with React, Spring Boot, and JHipster
What's New in Emacs 28.1?
Large Text Compression Benchmark
Can you convert a video to pure css?
Secure Node.js Applications from Supply Chain Attacks
Breaking CityHash64, MurmurHash2/3, wyhash, and more... | orlp.net
Rust: When Empty Isn't Bottom | ettolrach
The sad state of property-based testing libraries
JSON is not JSON Across Languages | Dochia CLI Blog
Java 25's new CPU-Time Profiler (1) - Mostly nerdless