Developer Shares Key Lessons From 100 Days of Learning to Code

·1 views

A self-taught developer named Aeron has shared reflections after reaching 100 days into his coding journey, following completion of the CS50 course. Progress slowed between days 30 and 70 due to demanding responsibilities at his previous job, leaving little time to code. In the most recent phase, he focused on building and deploying a real application using FastAPI, Streamlit, Render, Docker, SQLAlchemy, and Alembic. A key lesson came when renaming a class caused cascading failures across endpoints and tests, teaching him to consider downstream impacts before making changes. He also highlighted the benefits of switching from direct database connections via psycopg2 to connection pooling through SQLAlchemy sessions.

Read the full story at DEV Community

This is an AI-generated summary. ShortSingh links to the original source for the complete article.

Discussion (0)

Developer builds AI-powered math calculator that shows step-by-step workings

A developer created a step-by-step math calculator that not only computes answers but also explains the reasoning behind each solution. The project was motivated by the limitations of JavaScript's eval() function, which returns results without any explanatory steps and poses security risks with raw user input. Rather than hand-coding solving logic for every math category — from algebra to calculus — the developer integrated an AI model to handle flexible reasoning and language interpretation. The AI generates structured, step-by-step solutions, while LaTeX and MathJax handle mathematical notation formatting in the browser. Normal application code manages the interface, input processing, and response validation throughout the workflow.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

AWS EKS Cluster Scaled to 8 Nodes Live Under k6 Load Test With Karpenter and HPA

A hands-on experiment tested whether an AWS EKS cluster running Google's Online Boutique (11 microservices) could handle large-scale traffic using Kubernetes autoscaling tools. HorizontalPodAutoscalers (HPA) were configured for 10 services with CPU and memory targets, while Karpenter replaced the fixed node group to enable dynamic node provisioning. A k6 load test ramped up to 3,000 virtual users in-cluster, causing replica counts to climb across multiple services as CPU and memory thresholds were crossed. The cluster's node count grew from 2 to 8 at peak load, with Karpenter provisioning new EC2 instances in response to pending pods, then consolidating back to 2 nodes once the test ended. A key finding was that metrics-server must be verified before relying on HPA, as its absence causes HPA to silently fail rather than report an error.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

How Healthtech Platforms Should Handle Account Deletion and Session Revocation

A technical analysis outlines best practices for managing patient account shutdowns in health technology systems, emphasizing two distinct steps: disabling authentication eligibility first, then revoking all active sessions. The framework stresses that GDPR deletion requests require balancing three competing goals — immediate access termination, policy-compliant data deletion, and minimizing disruption to unaffected users. Developers are advised to maintain a traceable index linking user records to all associated sessions, since without it a full revocation becomes unreliable or incomplete. Retaining too much session data risks preserving identifiable credentials beyond their purpose, while retaining too little hampers forensic investigation after a security incident. Organizations are urged to involve legal counsel, security teams, and data governance functions together to determine jurisdiction-specific retention periods and audit evidence standards.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

DEV Weekend Challenge Offers $1,000 in Prizes for Generosity-Themed Builds

DEV Community has launched a weekend coding challenge themed around generosity, with submissions closing on September 7 at 6:59 AM UTC. The challenge was inspired by the International Day of Charity on September 5 and a community call-for-ideas earlier in the week. Participants are encouraged to build anything in the spirit of generosity, such as donation trackers, volunteer matching tools, or nonprofit utilities. Five winners will each receive $200, a DEV++ membership, and an exclusive badge, with four additional prize categories recognizing the best use of Snowflake, Solana, ElevenLabs, or Google AI. Submissions must be published as posts on DEV using the official template and will be judged on theme relevance, creativity, technical execution, and writing quality.

0 comments Read more at DEV Community