Karthik S

Full Stack Engineer

Bengaluru, Karnataka, India4 yrs 11 mos experience

Key Highlights

4+ years of experience in backend systems and microservices.
Expert in Node.js and scalable API development.
Passionate about continuous learning and knowledge sharing.

Stackforce AI infers this person is a Backend-heavy Fullstack Engineer specializing in SaaS and microservices architecture.

Contact

Skills

Core Skills

MicroservicesSoftware DevelopmentSecurityUser EngagementContent ManagementData AnalysisDatabase ManagementPerformance TuningSystem ArchitectureSystem MigrationBackend DevelopmentApi DevelopmentProcess Automation

Other Skills

Software DesignPerformance ImprovementNoSQLJavaScriptCIQueuesSwagger APIElasticsearchAmazon SQSJiraBitbucketSoftware DeploymentC++ContainerizationHigh-Level Design

About

Hi there!👋 I'm Karthik S, a software engineer with 4+ years of experience specializing in Node.js, microservices, backend systems, and APIs. I enjoy building systems that challenge my thinking and push me to grow. I am flexible with my skills and work best when exploring new tools, environments, or tough problems. Continuous learning keeps me inspired, and I find real value in passing that knowledge on to others. Thanks for stopping by!

Experience

4 yrs 11 mos

Total Experience

2 yrs 4 mos

Average Tenure

1 yr 7 mos

Current Experience

Iqz systems

Full Stack Engineer

Mar 2026 – Present · 2 mos · Atlanta, Georgia, United States

In plain english

Technical Editor

Oct 2025 – Present · 7 mos · Remote

Medium

Writer

Oct 2024 – Present · 1 yr 7 mos · Remote

I started writing down my software engineering journey through stories

Coditas

Software Engineer

Oct 2022 – Mar 2026 · 3 yrs 5 mos · Pune District

1. Integrated 𝗢𝗧𝗣-𝗯𝗮𝘀𝗲𝗱 𝗮𝘂𝘁𝗵𝗲𝗻𝘁𝗶𝗰𝗮𝘁𝗶𝗼𝗻, adding a security layer that 𝗿𝗲𝗱𝘂𝗰𝗲𝗱 𝘀𝗽𝗮𝗺 𝘂𝘀𝗲𝗿𝘀 𝗮𝗻𝗱 𝗶𝗺𝗽𝗿𝗼𝘃𝗲𝗱 𝘁𝗵𝗲 𝗾𝘂𝗮𝗹𝗶𝘁𝘆 𝗼𝗳 𝗹𝗲𝗴𝗶𝘁𝗶𝗺𝗮𝘁𝗲 𝘂𝘀𝗲𝗿 𝗲𝗻𝗴𝗮𝗴𝗲𝗺𝗲𝗻𝘁
2. 𝗕𝘂𝗶𝗹𝘁 𝗮 𝗽𝘂𝘀𝗵 𝗻𝗼𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 system using Firebase Cloud Messaging (FCM) to drive user activity, 𝗶𝗺𝗽𝗿𝗼𝘃𝗶𝗻𝗴 𝗰𝗹𝗶𝗰𝗸-𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝗿𝗮𝘁𝗲𝘀 𝗮𝗻𝗱 𝗿𝗲𝗰𝘂𝗿𝗿𝗶𝗻𝗴 𝘂𝘀𝗲𝗿 𝘃𝗶𝘀𝗶𝘁𝘀
3. 𝗗𝗲𝘀𝗶𝗴𝗻𝗲𝗱 𝗮𝗻𝗱 𝗶𝗺𝗽𝗹𝗲𝗺𝗲𝗻𝘁𝗲𝗱 content schemas using Strapi CMS, enabling ops teams to 𝗺𝗮𝗻𝗮𝗴𝗲 𝗰𝗼𝗻𝘁𝗲𝗻𝘁 𝗶𝗻𝗱𝗲𝗽𝗲𝗻𝗱𝗲𝗻𝘁𝗹𝘆 𝗮𝗻𝗱 𝗿𝗲𝗱𝘂𝗰𝗶𝗻𝗴 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝗱𝗲𝗽𝗲𝗻𝗱𝗲𝗻𝗰𝘆 𝗮𝗰𝗰𝗲𝗹𝗲𝗿𝗮𝘁𝗲𝗱 𝗰𝗼𝗻𝘁𝗲𝗻𝘁 𝘂𝗽𝗱𝗮𝘁𝗲 𝗰𝘆𝗰𝗹𝗲𝘀.
4. 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝗲𝗱 𝗮𝗻𝗱 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗱 a customer health scoring system using BullMQ, 𝗲𝗻𝗮𝗯𝗹𝗶𝗻𝗴 𝗽𝗿𝗼𝗮𝗰𝘁𝗶𝘃𝗲 𝗯𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝗱𝗲𝗰𝗶𝘀𝗶𝗼𝗻𝘀 𝗮𝗻𝗱 𝗶𝗺𝗽𝗿𝗼𝘃𝗶𝗻𝗴 𝗰𝗹𝗶𝗲𝗻𝘁 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝘀𝘁𝗿𝗮𝘁𝗲𝗴𝗶𝗲𝘀
5. 𝗢𝗽𝘁𝗶𝗺𝗶𝘇𝗲𝗱 database performance by implementing 𝗖𝗼𝗺𝗺𝗼𝗻 𝗧𝗮𝗯𝗹𝗲 𝗘𝘅𝗽𝗿𝗲𝘀𝘀𝗶𝗼𝗻𝘀 (𝗖𝗧𝗘𝘀), 𝗿𝗲𝗱𝘂𝗰𝗶𝗻𝗴 𝗾𝘂𝗲𝗿𝘆 𝗲𝘅𝗲𝗰𝘂𝘁𝗶𝗼𝗻 𝘁𝗶𝗺𝗲 𝗯𝘆 ~𝟯𝟬%
6. 𝗜𝗺𝗽𝗿𝗼𝘃𝗲𝗱 𝘀𝘆𝘀𝘁𝗲𝗺 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 by applying separation of concerns, 𝗱𝗲𝗰𝗼𝘂𝗽𝗹𝗶𝗻𝗴 𝗔𝗣𝗜𝘀 𝗮𝗻𝗱 𝗯𝗮𝗰𝗸𝗴𝗿𝗼𝘂𝗻𝗱 𝗽𝗿𝗼𝗰𝗲𝘀𝘀𝗶𝗻𝗴 𝘂𝘀𝗶𝗻𝗴 𝗡𝗲𝘀𝘁𝗝𝗦 𝘀𝘁𝗮𝗻𝗱𝗮𝗹𝗼𝗻𝗲 apps and containerized roles
7. Led 𝗲𝗻𝗱-𝘁𝗼-𝗲𝗻𝗱 𝗺𝗶𝗴𝗿𝗮𝘁𝗶𝗼𝗻 𝗳𝗿𝗼𝗺 𝗘𝘅𝗽𝗿𝗲𝘀𝘀.𝗷𝘀/𝗠𝗼𝗻𝗴𝗼𝗗𝗕 𝘁𝗼 𝗡𝗲𝘀𝘁𝗝𝗦/𝗣𝗼𝘀𝘁𝗴𝗿𝗲𝗦𝗤𝗟 for a global client, improving system scalability, performance, and long-term maintainability

Software DesignPerformance ImprovementMicroservicesSoftware Development

Verzeo

2 roles

Back End Developer

Jun 2021 – Oct 2022 · 1 yr 4 mos

1. Built core CMS capabilities including clone, publish, and rollback features, 𝗶𝗺𝗽𝗿𝗼𝘃𝗶𝗻𝗴 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝗲𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝗰𝘆 𝗯𝘆 ~𝟮𝘅 𝗮𝗻𝗱 𝗿𝗲𝗱𝘂𝗰𝗶𝗻𝗴 𝗿𝗲𝗹𝗲𝗮𝘀𝗲 𝗲𝗿𝗿𝗼𝗿𝘀 𝗮𝗰𝗿𝗼𝘀𝘀 𝗮 𝘁𝗲𝗮𝗺 𝗼𝗳 𝟲+ 𝗲𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝘀
2. Automated multi-tenant onboarding (MongoDB, single server–multiple DB setup), making the onboarding process faster and more scalable
3. Improved performance of 𝗮𝘁𝘁𝗲𝗻𝗱𝗮𝗻𝗰𝗲 𝗿𝗲𝗽𝗼𝗿𝘁𝗶𝗻𝗴 𝗯𝘆 𝗼𝗽𝘁𝗶𝗺𝗶𝘇𝗶𝗻𝗴 𝗱𝗮𝘁𝗮𝗯𝗮𝘀𝗲 𝗾𝘂𝗲𝗿𝗶𝗲𝘀 𝗮𝗻𝗱 𝗶𝗻𝗱𝗲𝘅𝗶𝗻𝗴 (𝟲𝘀 → 𝟮𝘀, ~𝟲𝟲% 𝗹𝗮𝘁𝗲𝗻𝗰𝘆 𝗿𝗲𝗱𝘂𝗰𝘁𝗶𝗼𝗻)
4. Developed backend APIs for a 𝗹𝗲𝗮𝗱 𝘁𝗿𝗮𝗰𝗸𝗶𝗻𝗴 𝗱𝗮𝘀𝗵𝗯𝗼𝗮𝗿𝗱, 𝗲𝗻𝗮𝗯𝗹𝗶𝗻𝗴 𝗼𝗽𝘀 𝘁𝗲𝗮𝗺𝘀 (𝟭𝟬𝟬+ 𝘂𝘀𝗲𝗿𝘀) with actionable insights using MongoDB 𝗮𝗴𝗴𝗿𝗲𝗴𝗮𝘁𝗶𝗼𝗻 𝗽𝗶𝗽𝗲𝗹𝗶𝗻𝗲𝘀, 𝗵𝗮𝗻𝗱𝗹𝗶𝗻𝗴 𝘁𝗵𝗼𝘂𝘀𝗮𝗻𝗱𝘀 𝗼𝗳 𝗿𝗲𝗰𝗼𝗿𝗱𝘀 𝗱𝗮𝗶𝗹𝘆

NoSQLJavaScriptBackend DevelopmentAPI Development