Sunil Tomar

Software Engineer

Bengaluru, Karnataka, India7 yrs 6 mos experience

Most Likely To SwitchHighly Stable

Key Highlights

Expert in high-scale backend systems design.
Proficient in Java and GoLang for microservices.
Strong foundation in Agile methodologies and CI/CD.

Stackforce AI infers this person is a Fintech Backend Engineer with expertise in microservices and cloud deployment.

Contact

Skills

Core Skills

Java (spring Boot)GolangAsp.netAndroid DevelopmentWeb Development

Other Skills

Microservices ArchitectureKubernetesAWSDatabase MigrationRate LimitingIncident & Alert PlatformReporting EngineMVC ASP.NetWCFSQL ServerEntity FrameworkjQueryTest driven developmentUnit test by MS TestAndroid Studio

About

Experienced Software Engineer with a demonstrated history of working in the information technology and Product/services industry. Skilled in C#(.NET), JAVA(Spring-boot), Golang, Agile & Waterfall Methodologies, and Scrum. Strong engineering professional graduated from Indian Institute of Technology, Kanpur. SUMMARY OF EXPERIENCE In individual contributor role, I have worked on: - Development of various web applications / RESTful web APIs in Java(Spring-boot) and C#(.NET). - Design and Development of Android application/ASP.NET web services. - Development and testing of web application using SOLID , TDD processes and Agile & Waterfall Methodologies. - Development and deployment over cloud using Amazon Web Services, IIS(Internet Information Services). - Development of web applications using various architectures like Micro-services Architecture, Event driven Architecture and Monolithic Architecture. - Development and deployment of complete Continuous Integration and Deployment (CI/CD) pipeline. If you have an opportunity which you think might be relevant to my experience and at the same time challenging enough do add me as a connection or reach me at tomarji852@gmail.com

Experience

7 yrs 6 mos

Total Experience

2 yrs 6 mos

Average Tenure

4 yrs 10 mos

Current Experience

Cashfree payments

3 roles

Software Development Engineer IV

Promoted

Apr 2026 – Present · 2 mos

Software Development Engineer III

Apr 2023 – Mar 2026 · 2 yrs 11 mos

High-Scale System Design: Built and maintained high-throughput backend systems handling 5.88K QPS and 500+ order creations/sec, ensuring low latency and high reliability.
Tech Stack Ownership:
1. Java (Spring Boot): Designed core backend services using Spring Boot, leveraging advanced multithreading and reactive programming (WebFlux) for I/O-intensive flows.
2. GoLang: Developed edge services in GoLang for rate-limiting, authentication, and request shaping; leveraged goroutines and channels for lightweight concurrency and performance.
3. Microservices Architecture: Majority of backend in Java; all edge and gateway-layer services in GoLang for optimal startup time and resource usage.
4. Version Upgrades: Led smooth Java upgrades from 11 → 17 → 21 across critical services, improving performance, security, and developer productivity.
5. Rate Limiting: Developed and deployed a custom GoLang-based rate-limiter on K8s for transaction protection across banking APIs.
Database Migration: Spearheaded a large-scale DB migration, boosting performance and cutting infra costs.
Reporting Engine: Architected a robust transaction reporting system with support for scheduled, real-time, and on-demand exports.
New Market Launch (UAE): Delivered Payouts & PG for UAE with 50+ microservices across 2 phases using ArgoCD, Bitbucket Pipelines, and AWS.
Global Infra Initiatives:
1. Secret Management: Migrated K8s secrets to HashiCorp Vault, strengthening security and compliance.
2. Incident & Alert Platform: Rolled out org-wide alerting system for 35+ teams, resulting in $3.5K/month savings.

Java (Spring Boot)GoLangMicroservices ArchitectureKubernetesAWSDatabase Migration+2

Software Development Engineer II

Jul 2021 – Apr 2023 · 1 yr 9 mos

Zestmoney

2 roles

Software Development Engineer - II

Promoted

Apr 2021 – Jun 2021 · 2 mos

Software Development Engineer-I

Jul 2019 – Mar 2021 · 1 yr 8 mos

Saggezza

Software Engineer

Jul 2018 – Jul 2019 · 1 yr · Bengaluru Area, India

Product/Project: Quantum project
Description: This project aims towards automation of Postal Service process. The solution is capable of calculating costs, maintaining reports and records. The user can upload a file containing content titles and necessary details and make use of web portal to calculate costs and download reports.
Client: LSC Communications
Technologies: MVC ASP.Net, WCF, SQL Server, Entity Framework, jQuery, Test driven development, Unit test by MS Test
Project Role: Back-end Developer
Responsibilities:
Development, design, test, maintain and support custom web applications using .NET framework, unit-testing framework
Development under agile methodology
Collect the software requirement by customer and develop the application as per their requirement
Development of high-quality code using SOLID and TDD techniques to meet customer requirement
Deliver project requirement with the quality with in time bar.
Reduced the time for execution of Postage charge calculations.

MVC ASP.NetWCFSQL ServerEntity FrameworkjQueryTest driven development+2

Mkt softwares private limited

Android Developer

May 2018 – Jun 2018 · 1 mo · Kanpur Area, India

Product/Project: HRMS Android App
Description: App was basically designed for the internal purpose of company to handle the Employee's accounts.
Client: Self Owned
Technologies: Android Studio using JAVA , ASP.NET to prepare Web APIs using C# in Visual Studio , SQL Server , Json
Project Role:Software developer
Responsibilities:
1) Fully Contributed towards Java development
2) Designed a new user interface for the application using XML in Android studio with flexible usability including dashboard and nine other modules i.e. leave management, attendance
3) Designed complete blackened by using the SQL Server database, prepared ASP.NET - Web Services in Visual Studio, used Volley Classes in Android Studio for API calls.

Android StudioJAVAASP.NETSQL ServerJsonAndroid Development

Reachivy

Summer Associate - Website Developement & Product management

May 2017 – Jul 2017 · 2 mos · Mumbai Area, India

Product/Project: Website Design and Product Management
Description: Designed the compnies website and Developed a product structure
Client:Self Owned
Technologies: MS Office , Photoshop , HTML, CSS, JavaScript
Project Role: Website developer and product developer
Responsibilities:
1)Designed a new user interface for the website using wire-frames with improved functionality and readability and reduced page-length by 75%
2)Analyzed and qualitatively reviewed more than 300 websites for bench-marking
3)Strategized the features and USP’s of the new upcoming educational advisory software
4)Successfully initiated implementation of new portal including wire-frame and operational flow