Keshav Singh

Software Engineer

Madrid, Community of Madrid, Spain3 yrs 8 mos experience

AI EnabledHighly Stable

Key Highlights

Designed scalable personalization systems at Amazon.
Improved API performance by 80% and reduced costs by 50%.
Passionate mentor and public speaker.

Stackforce AI infers this person is a Backend-heavy Fullstack Engineer in E-commerce.

Contact

Skills

Core Skills

Generative AiProblem SolvingNode.jsReact.jsLow-level DesignProject ManagementAws CloudformationPython (programming Language)

Other Skills

AWS GlueAdobe Premiere ProAmazon CloudWatchAmazon Web Services (AWS)C (Programming Language)C++CommunicationData AnalysisDjangoDjango REST FrameworkGoogle Cloud Platform (GCP)High Level DesignInterpersonal CommunicationJavaJavaScript

About

Four years ago, I was an Electrical Engineering student in India, curious about how large-scale systems work. Today, as an SDE-II at Amazon Madrid, I design and build personalization systems that simplify millions of customer journeys. My focus lies at the intersection of engineering excellence and operational excellence — creating scalable systems and processes that last. Along the way, I’ve grown as a Toastmaster, speaker, and mentor, passionate about helping others communicate better and think bigger. Through my SinghDevInsights newsletter, I share what I learn — from leadership principles to practical tech insights. 💡 Interests: Large-scale systems | Personalization | Leadership development | Public speaking | Knowledge sharing 📬 Let’s connect to exchange ideas on technology, growth, and impact.

Experience

3 yrs 8 mos

Total Experience

2 yrs 11 mos

Average Tenure

2 yrs 1 mo

Current Experience

Amazon

2 roles

SDE II

Promoted

Sep 2025 – Present · 8 mos · Greater Madrid Metropolitan Area

Worked with Amazon Search EUIC & Navigation Org with responsibilities:
Led the Filter Persistence Initiative, leveraging AI-driven customer signals to deliver a more personalized and consistent shopping experience across sessions and devices.
Authored multiple High-Level (HLD) and Low-Level Design (LLD) documents and conducted cross-functional design reviews to align stakeholders on scalable architecture decisions.
Improved API performance by 80% while reducing operational costs by over 50%, optimizing latency and efficiency of key personalization services.
Mentored engineers through design/code reviews and architectural discussions, fostering technical growth and high-bar engineering practices within the team.

Generative AIProblem SolvingMongoDBNode.jsReact.jsLow-Level Design+33

SDE

Sep 2022 – Aug 2025 · 2 yrs 11 mos · Greater Madrid Metropolitan Area

Collaborating within the Retail Search division as an Engineer, my responsibilities encompass:
Writing HLD and LLD for features in turn providing business value
Upholding Operational Excellence
Engaging in the development of direct customer-impacting Tier-1 services
Adhering to Agile Methodology and being guided by Software Development Processes
Conducting documentation and demo sessions
Tackling diverse technologies amidst the dynamic landscape of software requirements.
Working with various stakeholders across different Orgs

MongoDBNode.jsReact.jsLow-Level DesignPublic SpeakingLeadership+13

Toastmaster global

Member

Apr 2024 – Present · 2 yrs 1 mo · Madrid, Community of Madrid, Spain · On-site

As member of Toastmaster, working towards my goal to
Become better public speaker
Communicator in all forms of work and life
Being comfortable in Ambiguous situation

Pocket fm

Backend Developer Intern

Jun 2022 – Jul 2022 · 1 mo · Remote

Collaborated with the DS/DE Team on enhancing Client API using Python and Django technologies. Contributed to code optimization, bug fixing, and implemented decoupling in the codebase.

Python (Programming Language)Django

Camp yellow

SDE Intern

Feb 2022 – Feb 2022 · 0 mo · Remote

Collaborated in the development of the backend for a platform according to MVP specifications using Node.js (Express Framework) and showcasing proficiency in JavaScript and Linux.

Node.jsJavaScriptLinux

Samsung electronics

SDE Intern

May 2021 – Jul 2021 · 2 mos · Remote

Collaborated with Samsung's IoT Cloud Division, actively contributing to the development of SmartThings Services.
Played a pivotal role in the onboarding process for devices by designing and developing a critical web component named "Policy Server" for SmartThings Cloud.

Xupoli technologies inc.

Fullstack Developer Intern

Jan 2021 – Apr 2021 · 3 mos · Remote

Collaborated independently to create the Backend for a Stock Based App, maintaining direct communication with the Frontend Team. Deployed diverse strategies to minimize network traffic on the cloud and enhance the efficiency of database queries. Shared a valuable learning experience with the entire team.

Python (Programming Language)JavaScriptLinux