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
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♻️ 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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Packt

Author of FastAPI cookbook. The book is a reference for developing APIs in Python

Technical Author

Coreso SA

- Delivered an entire web application for phase shift controller data communication in 3 months from business requirements to UAT (User Acceptance Testing) phase.

- Setting up test routines leading to zero errors in production.

- Supporting energy operators in streamlining Excel macros to professional web applications reducing manual work by 80%

Python Developer

Gorilla - Decisions, based on data

Gorilla is developing a data-driven platform for energy retailers.

I joined the team to reinforce to the development of the Gorilla SaaS backend.

- Defined and developed back-end API features to enhance the platform’s functionality, resulting in a 10% increase in the speed of data-processing, measured through data-throughput rates.

- Implemented test-driven development and managed database migrations, that reduced downtime by 15% reflected on monitoring metrics such as execution time, error rates and database uptime.

Python Software Engineer

Royal Belgian Football Association

- Developed and maintained the backend service of the official Play Store App. It resulted in improved user engagement and satisfaction (1 million downloads in 1 month).

- Provided support to the men's national players' team selection, by improving existing pipeline, reducing maintenance operations by 90% measured through Jira tickets.

- Mentored 5 internships during their last year of master studies from several Belgian universities.

- Contributed to winning the 2021 UEFA GROW AWARDS for the digital strategy, demonstrating the impact and value of the work (See https://www.rbfa.be/en/news/rbfa-wins-prizes-2021-uefa-grow-awards).

CentraleSupélec - Paris-Saclay University Research Center

The EM2C laboratory, a CNRS (National Center for Scientific Research) unit and a laboratory of CentraleSupélec, combines academic research with applied studies in the fields of transportation and energy.

I have been hired to work on the 'Clean-gas' project of the European Commission.
The scientific goal of CLEAN-Gas is to develop new experimental and numerical tools for im-proving natural gas combustion in innovative burners.

- Setting up a model to predict the behaviour of diffusion flames (the most polluting flame in industrial application) leading to a significant reduction of pollutants emissions at the design stage of burners

- Published a manuscript, demonstrating the significance and impact of the research work

Early Stage Researcher

Welcome to My LinkedIn Profile🚀

I'm a software engineer with a decade of experience in the world of technology. Throughout my career, I've been driven by a relentless passion for innovation and problem-solving. 💡

My Professional Focus 🎯

My work is defined by a commitment to excellence and a dedication to pushing boundaries. 
I specialize in backend development and cloud computing impacting a huge number of people.
I had the chance to work with dozens of dev-teams spanning from research laboratories to governmental institutions and startups 🌟

What Sets Me Apart 🌟

Beyond technical prowess, I bring a unique blend of strategic thinking and collaborative spirit to every project. I thrive in team environments where diverse perspectives converge to tackle challenges and achieve ambitious goals. 🤝

Let's Connect 🌐

I'm always eager to connect with fellow professionals, industry leaders, and like-minded innovators. Whether you're looking to collaborate, explore new opportunities, or simply exchange insights, let's connect and forge meaningful relationships. 🌱

Get in Touch 📩

Interested in discussing software innovation, bringing your dev team to the next level, or simply exchanging ideas? Feel free to reach out via LinkedIn messaging.

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Giunio De Luca

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taplio

The Battle

Alexandre Zajac

Giunio De Luca

Followers

Posts

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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