Python Archives

Tech Optimizer

October 10, 2026

Designing a Concurrent Donation Ledger With FastAPI and PostgreSQL

Every year, billions of dollars flow through online crowdfunding platforms, leading to donor concerns about the allocation of funds. Traditional crowdfunding applications lack transparency, often leaving funds in unverified balances without real-time auditability or guarantees against double-allocations. GoodCause, a social impact platform, aims to address this issue by creating a system that ensures financial integrity and atomic fund distribution. Its architecture is based on mobile-first delivery, atomic auditability, and strict data isolation, utilizing technologies such as React Native, FastAPI, and PostgreSQL. The platform incorporates a mobile client for cross-platform navigation, a backend API for domain-driven routing, a database with Row-Level Security, and a payment gateway for secure transactions. A significant engineering challenge is preventing race conditions and double-spending in concurrent donation scenarios.

AppWizard

October 1, 2026

Top 5 Proxy vs VPN for Android App Developers Tools to Secure Test Builds

In Android app development, maintaining connectivity, security, and debugging capabilities is crucial. When connecting to a London edge server, all requests must be visible to QA teams, but using a consumer VPN can hinder debugging proxies. A debugging proxy allows developers to inspect request headers and modify data by terminating TLS on their workstation. In contrast, a VPN creates an encrypted tunnel for all device traffic but prevents debugging proxies from intercepting packets. TorGuard is a hybrid solution that combines a VPN with SOCKS5 and V2Ray endpoints, allowing for traffic encryption and application-specific proxying. mitmproxy is an open-source tool that enables scripted request manipulation and can intercept various traffic types. Tailscale uses a WireGuard-based mesh network to provide stable private IPs for devices without needing port forwarding. HTTP Toolkit offers a rootless interception method for Android, directing traffic to a laptop without complex configurations. WireGuard is a high-speed self-hosted VPN that encrypts packets but does not allow for inspection. To inspect traffic while changing geographic egress, developers can run mitmproxy on a laptop and connect it to a VPN, ensuring the proxy is closest to the app. For debugging Android HTTPS traffic, a proxy is preferred for reading or rewriting requests, while a VPN is better for changing exit IPs or encrypted routing. SOCKS5 masks IP addresses but does not encrypt traffic.

AppWizard

September 24, 2026

Google’s classic ‘Text’ app is now an Android app for Googlebook on the Play Store

Chrome Unboxed offers a membership called Chrome Unboxed Plus, providing an ad-free experience and access to a private Discord community. Google has introduced a new "Text" editor app for Googlebook OS, available on the Google Play Store, which features broad syntax highlighting, a multi-file tabbed interface, large-screen desktop navigation, and standard code tools. This app is designed to be a lightweight, distraction-free text editor optimized for various screen sizes, including foldable and smartphone formats, and may eventually be extended to the broader Android ecosystem.

AppWizard

September 22, 2026

We got Googlebook’s text editor app to run on Android, and it looks great

Googlebooks have officially started pre-orders ahead of their launch on October 4. The new laptop range includes a feature called Continue On, which facilitates seamless transitions between a Googlebook and a smartphone. An early preview of the Text app, a dedicated text editor available on the Google Play Store, shows it supports various programming languages and offers syntax highlighting. The app adapts well to different screen sizes, features a tab-based layout for managing multiple projects, and includes conventional tools like find and replace. While other text editor options will be available, the native Text app is specifically designed for Googlebooks. There are currently no plans to extend this app to other Android devices.

BetaBeacon

September 3, 2026

Building Tetris on Android With One Prompt and No Laptop

An AI coding agent called Gotcha can generate games and tools on Android phones by writing real code and running a local server. It can create games like Tetris and a 3D Angry Birds clone with features such as touch controls, score displays, and sound effects. Gotcha can also fix bugs in the game logic based on vague feedback. The autonomy and local capabilities of Gotcha make it a unique tool for developers, allowing for quick iteration and precise bug reporting.

Tech Optimizer

September 2, 2026

Connecting My LangGraph AI Agent to Postgres

A stateful LangGraph agent was developed to streamline a 15-minute booking process, mimicking a customer service representative. It features a user-friendly Streamlit UI and a backend powered by a Postgres database. The agent can respond to customer queries, calculate service prices, manage acceptance or rejection of services, propose appointment time slots, and confirm booking details. The agent operates in two persistence modes: in-memory for quick testing and Postgres for durability. Testing can be conducted locally with Streamlit or using Docker to simulate a production environment. Docker allows the application to interact with a PostgreSQL server without local installation, enhancing reproducibility. The project includes a docker-compose.yml file to initiate a PostgreSQL container, and users can also utilize a cloud-based Postgres solution. The application behavior remains consistent regardless of the database setup. The complete source code is available on GitHub for testing and further enhancements.

Winsage

September 1, 2026

New ClickFix campaign can deploy powerful multi-stage malware directly through Windows Terminal and PowerShell

Security researchers at Microsoft have identified a campaign named "TerminalFix" that exploits compromised websites to trick users into installing a backdoor. Users visiting these sites encounter a deceptive overlay prompting them to complete a fake Cloudflare CAPTCHA, which requires executing a malicious PowerShell command. This leads victims to inadvertently sideload dynamic link libraries (DLLs) and deploy a Python implant that creates encrypted reverse tunnels, allowing attackers to access internal networks.

Tech Optimizer

September 1, 2026

Connecting My LangGraph AI Agent to Postgres

A stateful LangGraph agent was developed to streamline a 15-minute booking process, featuring a user-friendly Streamlit UI and a backend powered by a Postgres database. The agent responds to customer queries, calculates service pricing, manages service acceptance, suggests time slots, and confirms appointment details. It operates in two modes: in-memory for rapid testing and Postgres for persistent storage. Testing can be done locally using Docker, which simulates a Postgres environment, or with a hosted Postgres instance. The project includes a docker-compose.yml file to initiate a PostgreSQL 16 container, allowing the application to connect to the database. Data persistence is ensured through Docker volumes, and the application can be run with specific commands after setting up the environment variables. The system has been tested successfully, demonstrating its ability to manage bookings and maintain data integrity across sessions. Future enhancements are planned to improve the booking workflow and integrate additional communication channels.

AppWizard

August 29, 2026

6 awesome things you can do with a terminal emulator on Android

Terminal emulators allow users to interact with operating systems through text commands. Termux is an open-source terminal emulator for Android available on the F-Droid store. Users can test internet speed directly from Termux by installing Python and using the speedtest command. Weather information can be accessed using the curl command for a three-day forecast, and users can create shortcuts for convenience. Termux can display system information using colorful ASCII art with tools like fastfetch or macchina. It allows remote access to the phone via SSH after installing openssh. Users can run AI chatbots locally using the command-line tool Ollama. Termux can also facilitate the installation of Linux-based operating systems on Android devices using the proot-distro tool.

Tech Optimizer

August 26, 2026

How to Protect Against Ransomware: 13 Steps [2026]

Global ransomware attacks increased by 0.8% quarter-over-quarter in Q2 2026. The group Qilin has 279 confirmed victims, maintaining its position as the leading threat actor for four consecutive quarters. The rival group The Gentlemen saw a 62% increase in victims, reaching 269. Checkpoint Research's report indicates a shift in the ransomware landscape, challenging the narrative of declining attacks. IBM's analysis shows breaches within supply chains and third-party vendors have quadrupled over the past five years. Effective ransomware protection requires administrative access to endpoints, firewalls, and backup systems, along with specific software versions and tools. The 3-2-1-1-0 backup strategy is recommended, emphasizing offline, immutable backups. Organizations should implement multi-factor authentication (MFA) across all access points and actively patch known vulnerabilities. Network segmentation is crucial to limit ransomware spread, and canary files can provide early warnings of attacks. Regular phishing simulations and a well-documented incident response plan are essential for preparedness.