Sachin Magdum

Over 10 years leading technical architecture, agile development, and maintenance of large-scale, critical-path software in Java and AWS. Expertise in Java/C/C++/C#, data structures, algorithms, low-latency design, and critical-path code. Track record of delivering high-impact initiatives at the Director/VP level, generating billions in revenue at Amazon and Microsoft. Proven ability to solve ambiguous problems, tech envisioning, driving 3YPs, getting things done, tech leadership, and engineering and operational excellence. Strong experience developing high-availability, high-security, micro-second latency web apps, APIs using distributed micro-service architecture, parallel computing, caching, and precomputing. Recognized for raising quality standards, improving customer experience, and driving tech team productivity through automation and innovation. Skilled Principal Software Engineer adept at executing development strategies via unique management and design style. Known for tackling unforeseen hiccups in software creation with agility and tireless commitment. Creative innovator of novel approaches to time-worn problems, proficient at employing colleagues and resources to combat everything from minor bugs to catastrophic software failures. Forward-thinking Software Engineer with background working productively in dynamic environments. Fluent in [Type] and [Type] programming languages used to develop software within [Industry]. Proud team player focused on achieving project objectives with speed and accuracy.

• FCTOP Certified (by Silver Brook)
• Vidnyankavya Award (by Shivaji University)

• Microsoft Corporation, Principal Software Engineer, Redmond, WA, 02/2022, To Date, - Modernization of DSTS | Impact: 100% Clean Migration of Auth-Stack - led the Datacenter STS modernization, crucial for availability, scalability, and development efficiency. This encompassed a service redesign, infrastructure upgrade, and token caching integration. Notably, I devised a validation framework comparing modern and legacy stacks, evaluating tokens, CPU, and memory consumption. This meticulous process ensures the modern stack's production readiness, fortifying Microsoft's security infrastructure with enhanced technology and streamlined development. - DSTS Security Analytics Platform - Design and develop of advanced security analytics system. A platform to monitor access by identifying involved parties, resource usage, and client applications/users. It tracks the environment (dev/prod), device type, user role, internal vs external IP address, claims, and usage patterns. This initiative has been instrumental in efficiently addressing security threats, attacks, and availability issues. Widely adopted, by hundreds of teams for operational and engineering excellence.
• Amazon.com LLC, Senior Software Engineer, Seattle, WA, 10/2019, 02/2022, 1. Launch Efficiency Owner (End-to-end - ideation to delivery) | Impact: 82% effort savings per launch - Owned SBCC (small business co-branded credit card) launch efficiency goal to reduce SDE effort to launch SBCC in a new country in partnership with American Express by 79% (from 655 SDE weeks for US launch to 135 SDE weeks in any new country) by 12/31/20. - Owned this program from ideation to discovery of 90 initiatives to delivery of complete (291+ SDE weeks of effort with the help of 24 SDEs, 3 L6 SDMs) program, critical path coding/design, reporting to directors, leading reviews/status meetings. - Exceeded the efficiency goal as the effort for launching the US SBCC features in a new country is reduced to 119 SDE weeks (82% effort reduction). 2. EU Expansion Lead (cross-functional role) | Impact: $1.8+ billion GMS - Led UK SBCC Development effort of 550 SDE Wks and uneventfully launched on Sept 20 - Developed CreditAccount resource, REST APIs and exposed them to American Express so that they can notify Amazon about CreditAccount updates using AWS API Gateway. - Led Germany Development effort of 240 SDE Wks and launched May 2021 - Led the SBCC DE design and partner integration of secure redirection of customers from Amazon Detail Page to Amex CARD application page in DE. - Unblocked team by taking ownership of IP-Mismatch, Token expiration, GetApplication latency, Mobile Redirection legal blocker. - Led France Development effort of 200 SDE Wks (launch Nov 2021): - Led the SBCC FR design, development, partner integration design, partner integration testing. 3. Operational Excellence Lead | Impact: All launches uneventful - Led OE for a Sr. SDM level organization - Identified 2021 OE Goals for org and documented the plan to meet, measure, track, report. - Led UK and Germany ORR process that resulted in uneventful launches. - Defined the review process, service template with 168 best practice questions, load-testing strategy, code-freeze strategy, operational decoupling strategy of different products. - Developed two-level annotation-based co-brand specific metrics/alarms framework. - Owned ORR review meeting, tracker, reporting, launch day and post-launch planning. 4. 3-Year Vision Ownership| Impact: 3-Year Roadmap and Planning Ready - Came up with 12+ 3YA ideas / 1-Page documents as part of 3YP activity. - Owned the design, planning of decoupling of the card application post-approval workflow. - Owned the design, planning of GDPR for the customer data saved in SBCC systems, data-stores.
• Amazon India, Senior Software Engineer, Bangalore, India, 12/2013, 10/2019, 1. Shopping Experience Lead | Impact: millions of $ GMS in Consumable - Led Amazon Pantry, PrimeNow, Fresh shopping experience, inventory discovery, smart-basket, offers design across search, detail page, cart, checkout, store pages, inventory, and fulfilment. 2. Significant latency improvement on Amazon Detail Page - Rupees 750MM GMS - Received "DP Deputy" award by the Detail Page (DP) team for my knowledge and work on DP to reduce latency. - Reduced DP latency by 96ms @P90 that unblocked the launch of multiple features owned by our and other org. - Fixed a bug in the DP Ajax controller of Detail Page and developed a generic mason module for Ajaxification on DP. - L7/L8 of the IN Consumable Org made me the owner of Grocery (Prime, Fresh) Detail Page launch. - Owned three-year vision document for Consumables organizations. 3. Customer Return's Lead | Impact: 67% of refunds converted to replacements, billions of $ GMS - Led and drove the architecture and CX of Amazon Returns (refund/replace/exchange) development. (350 SDE Wks of effort) - Influenced and coordinated 8 teams across different cities and countries to develop plug-in, entity, orchestration and capability-based architecture that led to an uneventful launch. - Owned three-year vision documentation for Amazon Returns organizations. 4. Deals and Events Architect | Impact: billions of $ GMS - Led Amazon Deals and Events team's event-driven, distributed architecture. - Led grid-based, personalized, paginated, faceted CX re-design. - As a result, the Deal's platform scaled to support 50k deals from 2.8k per day. Cost of hardware reduced by 60+% still scaled to support 400k requests/sec from 70k request/sec earlier. - Led OE that resulted in the reduction of tickets from 150+/Wk to ~10/Wk in peak days. - Learnings - Tech Leadership, CI-CD best practices, Test-NG, KPIs, Telemetry, Retail Systems.
• CA Technologies, Principal Software Engineer, Bangalore, India, 07/2012, 11/2013, Lead design and development of multi-platform transaction risk scoring system using VC++, C++, Linux, Windows, Unix, Java, MSSQL, Oracle and PostgreSQL. Learnings - Leadership Project Management, Agile Scrum, Rule Engine Structure, Design Patterns.
• Computer Sciences Corp., Sr. Software Engineer, Chennai, India, 11/2010, 07/2012, Lead design and development of touch-stone, incentive services using Linux, C, C++. Learnings - N-tier Architecture, Python scripting, SDL, SQL, Payment Gateway, DS and Algorithms.
• GCOM Software Inc, Lead Software Engineer, Albany, NY, 08/2009, 08/2010, Lead design and development of adjournment system for NY City govt using ASP.NET, C#, MSSQL. Learnings - Azure, Entity Framework, 3 tier architecture, Client Communication, DS and Algorithms.
• Extentia Information Tech., Software Professional, Pune, India, 08/2007, 08/2009, Lead design development of MS Office plugins, Windows controls, C#, ASP.NET application.
• Encodex Technologies, Senior Software Engineer, Pune, India, 01/2007, 08/2007, Design and development of Real-Time Change Detection on Linux using RHEL Kernel, C, C++.
• Sungard Offshore services India, Software Engineer, Pune, India, 06/2006, 01/2007, Design and development of BRASS, an Order Management System for stockbrokers using Windows, C# .NET, Back End- Solaris/Unix, C++, Sybase.
• Calsoft Private Limited, Software Engineer, Pune, India, 07/2005, 05/2006, Design and development of Panasas Storage Cluster using Linux, C, C++.

• Java
• C/C++
• C#
• MS-SQL
• Oracle
• MYSQL
• PostgreSQL
• NoSQL
• DynamoDB
• Apache Solr
• Python
• NumPy
• Pandas
• Spring Boot
• Spring MVC
• Spring Framework
• REST APIs
• TestNG
• Mockito
• JUnit
• Amazon AWS (SQS/SNS, Kinesis, IAM, Cloudwatch, Lambda/Farget, EC2, ECS, EKS, APIGateway, Firehose, S3)
• Caching
• Precompute
• Datapath
• Amazon API
• Kubernetes
• Elastic search
• Microsoft Azure (Cosmos, AAD, STS, SQL, Kusto, Telemetry Instrumentation)
• Git
• Apache Lucene
• Apache Kafka
• Redis cache
• Memcached