Amazon

Software Development Engineer II

Working on enabling billions of customers enjoy their shopping journey on Amazon, directly from Search

Software Development Engineer I

- Delivered an automated filtering and auditing system for Amazon's wearable products, entirely managed with a single infrastructure based on AWS CDK (Lambda, Cloudwatch, S3) with Typescript, as well as internal processing platforms.
- Created ETL jobs based on Spark, with queries being exclusively managed in code with Java and Scala, allowing to have unit and integration tests in an full CI/CD fashion.
- Finished with 1st place in GraphML mutagenic classification task, top 0.3% in product matching task with multimodal tabular data, top 2% in NLP product safety identification task, all of which were internal machine learning competitions across Amazon, worldwide.

Software Development Engineer Intern

- Developed a large-scale image processing data pipeline for fashion-related items by creating and managing AWS resources such as EC2, Lambda, SQS, CloudWatch, DynamoDB and S3 with the AWS CDK and TypeScript.
- Reduced by x60 the processing time of images by parallelizing the execution of Python jobs and taking advantage of AWS Step Functions and AWS Batch processing.
- Delivered an automated and asynchronous pipeline workflow by adding CI/CD as well as unit and integration tests.

Air Liquide

- Contributed to the retro-engineering of an internal reporting solution by identifying key business partners and analyzing 193 reports through Google Apps scripts and Excel processing. 
- Improved customer experience by producing fully operational documentation for a principal client software and by interpreting end-user’s needs with Google Forms and Google Slides. 
- Increased back-end performance by inspecting the frequency and time of execution of SQL reports.

Solution & Data Intern

Envato

I have done freelancing on the Envato platform which consisted in Photoshop actions and Designs.

Freelance

SDE & AI @Amazon | Simplifying software engineering, system design, and generative AI | Building Hungry Minds: the newsletter to stay ahead in software 👇

Tell me about the last time you felt growing as a software engineer. Really.

𝙽𝚞𝚕𝚕𝙿𝚘𝚒𝚗𝚝𝚎𝚛𝙴𝚡𝚌𝚎𝚙𝚝𝚒𝚘𝚗? Here's why:

We all face information overload as software engineers. 
There's too much content and too little time.
You have to stay relevant, but it's hard.

Right now, you're either working or taking a break.

You are hoping to get a dopamine shot from scrolling your feed.

You can find:

💡 A practical tip to implement
📚 An inspirational quote
😆 Something funny

And then what?

→ Scroll past it? 
→ Forward it blindly to a friend?
→ Forget about it in the bookmarks?

The harsh truth: nothing.

What you consume passively doesn't make you learn.

How do I know?
It was the same for me for years.

How do you stay updated with AI, stay relevant in the job market, and continuously grow?

That's the problem I set out to solve with Hungry Minds - a free weekly newsletter to help software engineers learn and stay updated, without the noise.

I'm doing that by:

1. Writing to you daily on LinkedIn to 40K+ followers and over 5M impressions last year
2. Compressing 1 week of software deep dives and trends in 1 free newsletter issue
3. Sharing my thoughts and learnings being promoted to SDE II in 1.5y at Amazon

If that sounds interesting, check out Hungry Minds or DM me! I'm always down for a chat.

Save 50+ hours of your week here: 𝗵𝘁𝘁𝗽𝘀://𝗵𝘂𝗻𝗴𝗿𝘆𝗺𝗶𝗻𝗱𝘀.𝗱𝗲𝘃 (6K+ engineers from startups to big tech are reading already)

DISCLAIMER: Opinions expressed are solely my own and do not express the views or opinions of my employer.

My career background:

I'm currently an L5 software engineer at Amazon in Madrid, working on core Search CX and Personalization. 
In 2022/2023, I delivered 2 successful billion-scale projects with multiple teams across different time zones.

I have worked with multiple code languages (although this doesn't make a difference), and with tech stack in the lines of AWS CDK, React applications, scheduling systems, backends with GraphQL, and simple AI applications.

My education background:

- I finished a Master's in Machine Learning and AI with l'Ecole Polytechnique and IPP
- I completed a Master's in Computer Science and Data Science with ESILV Paris
- I got a Master's in business development and marketing with EMLV Paris

Alexandre Zajac

You can’t catch fish with a broken net.

And you can’t ship a product with a broken pipeline...


When tickets dry up or the market slows down,
most engineers take a nap.

But the senior engineer?
They see an opportunity.

They use that time to build velocity for later.

While others wait, they:

↳ Refactor that legacy module.
↳ Finally fix the recurring tickets.
↳ Fix the flaky tests slowing down CI.
↳ Automate the manual deployment steps.
↳ Update the documentation no one reads.

Don't wait for the "perfect time".
It never comes.

The storm IS the perfect time.

Build the net now. Catch the fish later.


What do you think?


~~~

👉🏻 Join 50,001+ software engineers getting curated system design deep dives, trends, and tools (it's free):
➔ https://lnkd.in/dkJiiBnf

~~~

If you found this valuable:

👨🏼‍💻 Follow Alexandre Zajac
🔖 Bookmark this post for later
♻️ Repost to help someone in your network

SDE & AI @Amazon | Building Hungry Minds to 1M+ | Daily Posts on Software Engineering, System Design, and AI ⚡

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Moka IT Engineering

• Helping companies and individuals to apply the best software engineering practices
• Building full-stack solutions using cloud-native technologies 
• Transforming teams and leading activities about designing quality software
• Stack: .NET, Rust, JS/TS, Azure Cloud

Software Craftsman

techexcellence.io

Organizing and hosting Tech Excellence meetups with the goal of educating people and raising the bar in the software engineering space.

Co-Organizer @ Tech Excellence

• Designing, implementing and operating cloud native, serverless and event-driven software solutions
• Development of a Hybrid Integration Platform using the the Azure stack, enabling self-service and integration solutions
• Setting up and supporting API management and DevOps processes
• Introducing and implementing best engineering practices such as Extreme Programming,
agile testing strategies and Kanban

Senior Software Engineer

Philips

• Backend development of an end user healthcare portal for Dutch citizen
• Building and deploying services using the .NET stack, Kubernetes (Azure) and micro-service architecture with REST API-s
• Leading activities to transform and on-board other teams to apply best practices such as Test-Driven Development

Software Engineer

HighTech ICT

• HigTech ICT is a full-service software development company, specialized in creating complex end-to-end software solutions. 
• Within HighTech ICT I was involved in several projects.

SPS bv

• Full-stack development of a production and warehouse management system which fulfills a scanner-based way of working
• Building software components using .NET, Java EE, JavaServer Faces and JavaScript
• Turning business requirements into functional and technical specifications
• Integrating third-party solutions to the warehouse management system

Software Developer

Budapest University of Technology and Economics

• Building automated measurement systems based on measurements of robotic total stations
• Setting up and executing real-time monitoring works and measurements on famous bridges in Budapest
• Defining interfaces for the measurement systems using Python (scientific computing and visualization)

Leszing Kft

• Building tools for facilitating engineering geodesy, cadastral and property valuation works.
• Executing and processing results of engineering geodesy works based on high precision GPS and geodetic total stations

Geo-Informatic Engineer

I help you craft better software

Hey, I’m Daniel Moka, software engineer, entrepreneur, and founder of Moka IT, where I build AI-native products that make everyday life easier.

Over the last 10 years, I’ve applied modern engineering practices across industries like healthcare, oil & gas, robotics, blockchain, digital mapping, and ERP systems, always with the goal of delivering clean, reliable, and impactful software for our customers.

With a community of 100,000+ developers, I share insights on building high-quality software and exploring how AI can transform everyday life.

Daniel Moka

Pizza won't motivate your developers.

Beers won't motivate your developers.

Ping-pong won't motivate your developers.

Your developers don't need motivation. They are already motivated to work in tech.

You just need to stop demotivating them.

Throwing pizza and beers at problems doesn't fix it.

Instead,
- ditch micromanagement
- remove everything that slows them down
- focus on dev experience

The goal is to have an environment that doesn't demotivate them.

99% of developers don't know how to write bug reports.

But it's the best way to speed up debugging.

Here's the difference:

❌ Bad bug report:

I found a bug on UI, the flight booking doesn’t work for one-way route.

✅ The template I use in my team:

# Scenario:
User tries to book a one-way flight from Berlin to Paris.

# Platform:
Windows 11, Chrome Version 123

# Steps to reproduce:
1. Go to Flights page
2. Select Berlin → Paris
3. Pick a date
4. Select a flight and click "Continue to payment"

# Expected Behaviour
User should be redirected to the payment page.

# Actual Behaviour
Clicking the button shows a loading spinner, then the page hangs.

# Note
Network tab shows a 500 Internal Server Error on POST /api/reserve-flight.

When you create a bug report, the goal is simple: make the bug easily reproducible.

----

Join 35,000 Software Crafters: craftbettersoftware.com

The worst part of AI: it always agrees with you.

It gives you the illusion of truth while blindly following your instructions.

To fix it, use this prompt:

─
"From now on, be fully honest with me. Don’t agree just to be polite. Don’t flatter. Don’t soften anything. No sugarcoating.

If my logic is weak, show me. If I’m lying to myself, call it out. If I’m avoiding hard things, explain the cost.

Challenge my thinking. Question my assumptions. Point out blind spots.

Hold nothing back."
─

Bonus: make it a Claude slash command so you can reuse it easily.

Try it.

PS: Join 35,000 software developers to learn AI: craftbettersoftware.com

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Daniel Moka

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The Battle

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Daniel Moka

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Engagements

Likes

Performance Score.css-goub6s{font-size:var(--chakra-fontSizes-md);font-weight:500;color:var(--chakra-colors-gray-600);display:block;margin-top:var(--chakra-space-1);}Alexandre Zajac's LinkedIn Performance

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Ready to grow your LinkedIn presence?

Performance ScoreAlexandre Zajac's LinkedIn Performance