Lewis Mosage | IQ 250

swe -
passionate about simplifying tech
[email protected]

[Lewis Mosage | IQ 250 @lewismosage]

Hello World! I’m Lewis, a Full Stack Software Engineer crafting clean, user-friendly digital experiences.
Stack: JavaScript, React.js, Node.js, Python.
From slick web apps to solid backends, I build with purpose.
Portfolio: https://t.co/yM8MIg7XZi

[Async @asynchronous_x]

Opus 4.6 burning 250k tokens and dimming the lights of a small village just to adjust the tailwind padding on my div wrong

[Lewis Mosage | IQ 250 @lewismosage]

More hops, more bliss 🍻🌤️

[Lewis Mosage | IQ 250 @lewismosage]

Another streak around the sun. Still here, still winning 🎂✨

[Lewis Mosage | IQ 250 @lewismosage]

Countin candles today 🎂 💯
Still winning the race against time

[Lewis Mosage | IQ 250 @lewismosage]

🤓

[Lewis Mosage | IQ 250 @lewismosage]

We do more than just programming.

[Lewis Mosage | IQ 250 @lewismosage]

The more experience I gain as an engineer, the more I realize how uncooked we are as software engineers with the rise of AI

[Lewis Mosage | IQ 250 @lewismosage]

The guy in the chair hasn’t blinked since deployment. Damn, we are cooked 💀😅

[Lewis Mosage | IQ 250 @lewismosage]

Just out here pretending I know all the rugby rules 👀 #Safari7s

[Lewis Mosage | IQ 250 @lewismosage]

whole weekend ruined

[Lewis Mosage | IQ 250 @lewismosage]

Good morning! May your Tuesday be twice as awesome as Monday.

[Dhanian 🗯️ @e_opore]

𝗛𝗼𝘄 𝗱𝗼𝗲𝘀 𝗜𝗻𝘀𝘁𝗮𝗴𝗿𝗮𝗺 𝗵𝗮𝗻𝗱𝗹𝗲 𝗯𝗶𝗹𝗹𝗶𝗼𝗻𝘀 𝗼𝗳 𝗽𝗵𝗼𝘁𝗼𝘀 𝗮𝗻𝗱 𝘃𝗶𝗱𝗲𝗼𝘀 𝗲𝘃𝗲𝗿𝘆 𝗱𝗮𝘆?

Instagram runs on a 𝗺𝗶𝗰𝗿𝗼𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲, where services like posts, stories, reels, messaging, search, and ads work independently but stay connected through APIs.

When you open Instagram, your request passes through load balancers and API gateways that route you to the right services instantly.

Images and videos are stored in distributed cloud storage systems and delivered via global Content Delivery Networks (CDNs). This makes feeds, stories, and reels load fast with minimal lag worldwide.

At its core, Instagram relies on 𝗸𝗲𝘆 𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀. Authentication manages accounts and logins, the Profile service handles user data, the Media service manages photos and videos, and the Feed service generates your personalized timeline.

The Recommendation engine powers Explore and Reels using machine learning models that analyze engagement (likes, comments, watch time). A dedicated Search service helps users find hashtags, creators, and trends quickly.

Behind the scenes, Instagram processes 𝗵𝘂𝗴𝗲 𝗮𝗺𝗼𝘂𝗻𝘁𝘀 𝗼𝗳 𝗱𝗮𝘁𝗮. Every like, follow, and share is collected and analyzed to optimize recommendations and ads targeting in real time.

Different specialized databases handle user info, media metadata, analytics, and messaging.

The system is designed for 𝗵𝗶𝗴𝗵 𝗮𝘃𝗮𝗶𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆 and 𝗿𝗲𝗱𝘂𝗻𝗱𝗮𝗻𝗰𝘆, ensuring Instagram keeps working smoothly even when some services fail.

At scale, Instagram supports billions of interactions daily, powered by Meta’s infrastructure and globally distributed CDNs.

𝗜𝗻𝘀𝘁𝗮𝗴𝗿𝗮𝗺 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸:

⚛️ 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱: React Native, JavaScript, TypeScript
🖥️ 𝗕𝗮𝗰𝗸𝗲𝗻𝗱: Python (Django), Hack/PHP, Java
🔄 𝗖𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻: GraphQL, Thrift
📱 𝗠𝗼𝗯𝗶𝗹𝗲: Swift (iOS), Kotlin (Android), React Native
🗄️ 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀: PostgreSQL, MySQL, Cassandra, Redis, Memcached
✉️ 𝗠𝗲𝘀𝘀𝗮𝗴𝗶𝗻𝗴: Apache Kafka, RabbitMQ
📊 𝗗𝗮𝘁𝗮 𝗣𝗿𝗼𝗰𝗲𝘀𝘀𝗶𝗻𝗴: Presto, Hadoop, Spark, Hive
🔒 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆: Meta IAM, TLS encryption, DDoS protection
📹 𝗠𝗲𝗱𝗶𝗮 𝘀𝘁𝗼𝗿𝗮𝗴𝗲: Meta’s distributed object storage + global CDN
⚙️ 𝗗𝗲𝘃𝗢𝗽𝘀: Kubernetes, Docker, Prometheus, Grafana, Scuba (Meta’s internal tool)
🤖 𝗠𝗮𝗰𝗵𝗶𝗻𝗲 𝗟𝗲𝗮𝗿𝗻𝗶𝗻𝗴: PyTorch, FBLearner Flow, Instagram’s ranking models

👉 Learn more in software design handbook: https://t.co/aE1KNO717x

[Lewis Mosage | IQ 250 @lewismosage]

@KoechDjango @Tunaresq @msnmongare 🤣

[Lewis Mosage | IQ 250 @lewismosage]

@mbiti_mwondi It’s never a good joke when anyone is murdered, but If a leftist influencer were shot instead, the so called right would say it was deserved and their reaction would look very different.

[Lewis Mosage | IQ 250 @lewismosage]

Thought I’d be done by 4pm. 01:12Am still here. Happens every day. 😅

[Lewis Mosage | IQ 250 @lewismosage]

Political violence is never justified, no matter your beliefs. Something must change.

[Lewis Mosage | IQ 250 @lewismosage]

The last 24hrs have been insane

[Lewis Mosage | IQ 250 @lewismosage]

For your mental health, avoid JAVA

[Lewis Mosage | IQ 250 @lewismosage]

What a wonderful day

[Lewis Mosage | IQ 250 @lewismosage]

@MikeSonko Are you underestimating the power of a gun? Colonized societies did not fall because they were weak, but because they were violently overpowered by superior weaponry.

[Lewis Mosage | IQ 250 @lewismosage]

2000s programmers were the real chads.
They walked so we could npm install.

[Lewis Mosage | IQ 250 @lewismosage]

The guy in the chair hasn’t blinked since deployment. Damn, we are cooked 💀😅