Sachin Mangarole

Projects : Partner Settlement and Billing (PSB)

The Partner Settlement application is a cloud-based solution that automates interconnect billing, invoicing, and reconciliation for telecom operators. It streamlines processes with features like automated invoicing, real-time reporting, and rate sheet import. This solution optimizes efficiency, accuracy, payment visibility, and dispute resolution while simplifying aggregation tasks.

Team Size : 35+

Accomplishments:

• I led and mentored cross-functional teams of 35 engineers to successfully deliver Java customizations and enhancements for an interconnect billing and invoicing application within the telecom partner settlement domain.
• Coordinated release activities and liaised with cross-functional teams to ensure seamless deployment of software updates. Facilitated swift resolution of technical and functional issues with effective collaboration across verticals.
• Conducted comprehensive code reviews, ensuring adherence to coding standards and best practices, thus enhancing code quality and reducing technical debt by 12% compared with legacy processes.
• Played a pivotal role in Request for Proposals (RFPs), presales activities, and design reviews, influencing technical strategies and shaping the product roadmap.
• Contributed to the design of an aggregation microservice, utilizing Spring Boot, Spring Batch, and Apache Kafka to efficiently process large volumes of CDR data. Peer-reviewed the Low-Level Design (LLD) for the same, facilitating consolidation and analysis of customer data from multiple sources for reporting and decision-making purposes.
• Led the upgrade of a legacy interconnect billing system to the latest version, overseeing the migration of customer data for 10K+ subscribers with a team of 12 engineers. Employed strategic project planning, utilizing scaled agile delivery modes, resulting in successful delivery and securing $300K in revenue from the customer

Skill Set: Maven · Amazon Web Services (AWS) · Spring Boot · Product Development · Java · DevOps · Apache Kafka · Problem Solving · Microservices · Technical Leadership · Engineering Management · Git · Requirements Analysis · System Architecture · Scaled Agile Framework

Projects : Absence Insurance Management

Fineos Corporation's Absence Insurance Management project automates employee leave processes like sick leave, vacation, and parental leave. It includes features such as leave request submission, approval workflows, balance tracking, and payroll integration. Ensuring compliance and enhancing workforce management efficiency are key objectives.

Team Size : 15

Accomplishments :

• Devised and led a team of 12 engineers to enhance the Absence Insurance Management product, resulting in a $5 million contract extension for Capgemini with engineering process improvements.
• Generated $300K in revenue by proactively contributing to 5 RFPs and technical reviews, enhancing the product roadmap with new strategies.
• Conducted peer reviews on a claim adjudication microservice solution, prioritizing security, performance, and scalability requirements.Resulted in fewer quality issues post-implementation
• Regularly tracked and reported engineering metrics such as defect density, escape rate, test coverage (maintained at 90%), regression pass rate (maintained at 95%), and code review metrics to senior leadership, facilitating data-driven evaluations of project health and progress.
• Composed precise SQL queries and procedures for Oracle and MySQL databases, aligned with technical needs.
• Spearheaded a team of 8 engineers in the successful modernization of a legacy frontend to a responsive web app using React.Js, CSS, and Bootstrap.Js. Completed the transformation one month ahead of schedule, resulting in an improved web experience.
• Designed microservice components with Spring Boot and Apache Kafka on AWS EC2, ensuring scalability & resilience.

Skill Set: Maven · Amazon Web Services (AWS) · Linux · Spring Boot · Product Development · Java · DevOps · Extract, Transform, Load (ETL) · Problem Solving · Microservices · Engineering Management · Requirements Gathering · Continuous Process Improvement · Git · Agile Application Development · Design Patterns · Docker & Kubernetes · Cross-functional Team Leadership

Projects : Account Opening Software, Loan Origination Software.

The company's product lineup includes Account Opening and Loan Origination Systems, both relying on BPM Workflow solutions from a third-party BPM Rule Engine. The technology stack encompasses Spring Boot, BPM Workflow, JBoss EAP, JSP, and JavaScript. Project objectives involve integrating these systems with various other software products/components via web service interfaces, managed by a dedicated team.

Team Size : 8

Accomplishments :

• Built REST interfaces with Spring REST controllers, integrating third-party components with product modules
• Developed domain-specific adapter classes in Java and utilized JMockito libraries for JUnit testing, improving code reusability, and eliminating boilerplate code redundancies. This initiative aligns with best coding standards and practices, promoting efficiency within the development team.
• Collaboratively managed change requests, bug fixes, and patch releases, improving project delivery timelines by 20%
• Mentored junior developers for improved coding skills and understanding of best coding practices, leading to an increased delivery efficiency of 98%.
• Enhanced software reliability by conducting comprehensive code reviews, identifying areas for improvement, and providing constructive feedback to team members.
• Streamlined software development processes by implementing agile methodologies result in accelerated project completion and enhanced team productivity.

Skill Set: Code Review · Maven · Collaborative Problem Solving · Spring Security · Linux · Jenkins · Spring Boot · Java · RESTful WebServices · Gradle · Spring Batch · JavaScript · Problem Solving · Technical Leadership · Spring · PostgreSQL · Hibernate · Git · Agile Application Development · React.js · Design Patterns · Requirements Analysis · API Development · Sonarqube

Projects : Convergent Charging & Billing Solution

SAP CC (Convergent Charging System) is a set of distributed Java-based software components that comprise the services being offered to telecom subscribers for charging and billing functions in a telecom environment. Dispatchers, raters, bulk writers, etc., which are interconnected through REST APIs.

Team Size : 9

Accomplishments :

• Optimized SAP platform's Convergent Charging application to handle 200 million transactions per second (200 tps) by fine-tuning the JVM parameters and application
  configuration parameters.
• Analyzed production issues using JVM tools within the Convergent Charging application.
• Simplified and executed performance tests and volume using JMeter and Wiley Interscope JVM hooks for optimal app performance
• Improved observability by generating reports on project performance parameters such as latency, efficiency, throughput, etc. led to 20% faster optimization of the convergent charging application

Skill Set: Maven · Java · Problem Solving · Web Services · JMeter · SAP Convergent Charging · Volume Testing · Design Patterns · System Integration Testing · Object-Oriented Programming (OOP) · Java Virtual Machine (JVM) · OpenJDK · Java Performance

Projects : Cross Browser UI Transformation, Generic Msg Loaders, GE-Lighting Web Portal

As part of my experience, I collaborated with GE's Transportation Department on the migration of 12 legacy loader applications to a modern Java technology stack. These applications, Java-based and utilizing JMS, processed real-time data from satellite messages and middleware, enhancing performance and scalability.

Additionally, I engaged with GE's Research Team in Japan, contributing to the development of an application system to manage lighting products for external clients. This system encompassed functionalities such as lighting product specifications, online quotations, work orders, reports, equipment management, and user roles, facilitating streamlined operations for the team.

Team Size : 6

Accomplishments :

• I led a team of 4 developers in modernizing legacy UI by implementing responsive web pages using Spring MVC, React, CSS, and jQuery for a cross-browser modernization project.
• Improved real-time locomotive health monitoring by developing adapters and routing mechanisms using Java 8, Apache Camel and Apache ActiveMQ for GE's vehicle message loader application, resulting in 15% faster responses and enabling quick actions for vehicle operators
• Built cross-browser web apps with CSS, Bootstrap.js, and jQuery, with client-side validations, enhancing UI capabilities for the GE-Lighting Web portal.
• Implemented CI/CD workflows with Jenkins and gitlab for faster release cycles and improved application reliability.
• Optimized resource allocation across multiple concurrent projects by closely tracking team capacity levels against project deadlines and milestones.

Skill Set: SOAP XML Webservices · Team Management · Software Development · Linux · Spring Boot · Java · Hibernate ORM · RESTful WebServices · Oracle Database · Problem Solving · Spring MVC · Spring · jQuery · Git · Design Patterns · Bootstrap.js · REST APIs

Projects : e-KYC Web Portal, e-POS Web Portal, Service Delivery Platform (Rating Engine, Notification Engine)

A project known as e-KYC caters to the need to capture the CAF information as well as the KYC details of the reliance 4G services subscriber digitally using Android TABLETS as the front-end and JAVA, Apache, SAP/CRM as the back-end. which eliminates the need to use the papers for such tasks.

SDP (Service Delivery Platform) is the set of distributed software components that comprise the services being offered to telecom subscribers. Major components include the account management system, rating engine, & partner billing system.

Team Size : 4

Accomplishments :

• Designed business logic for more than 20 web services, employing the Axis-2 framework to connect the e-POS web portal implementation on the home network gateway, integrating with TIBCO ESB and SAP CRM backends. This integration enhanced system interoperability and streamlined operations.
• Prepared 40+ WSDLs to facilitate seamless SOAP communication between SAP CRM, TIBCO, and the product application layer.
• Devised robust business logic for 20+ SOAP web services, integrating e-commerce app with SAP-CRM through TIBCO-ESB
• integrated Facebook and Google authentication APIs into the Notification Engine project using Spring Core and Hibernate ORM modules. This OAuth integration improved system usability and security, leading to a 30% increase in user adoption.
• Integrated Aadhar validation into e-KYC portal with AADHAAR API for seamless authentication and authorization
• Employed design patterns (Business Delegate, DAO, Adapter) for clean, maintainable, and scalable code architecture.

Skill Set: Software Development · Java Database Connectivity (JDBC) · REST APIs · Core Java · JavaScript · Cross-functional Collaborations · Oracle Database · Problem Solving · Spring · PL/SQL · Hibernate · Software Design Patterns · API Development

Project: Goldfish

Goldfish is an application built for the MacOS platform whose primary goal is to restore the machine (client) user drives to their original state on reboots, i.e., all the changes made when Goldfish is active, such as any software installation, folder data modifications, and virus infection on the client machine, will be lost after the reboot (Sand Boxing Local Disc). In other words, it's a data protection application.

Team Size: 3

• Developed components for a standalone network application on the Mac-OS platform with a 6-member development team
• Reduced system downtime by proactively addressing potential issues through regular maintenance activities.
• Improved software performance by identifying and resolving bottlenecks in the code.
• Teamed with developers to implement UI integration and Business Logic for macOS desktop applications, it protects the client machine's desktop drives to their original state, wiping out any modifications on reboot.

Skill Set: Objective-C · Software Development · Network programming · Core Java · Oracle Database · Problem Solving · BSD Linux · MacOS · Object-Oriented Programming (OOP)

• Collaborated with production support teams to resolve bugs and request enhancements
• Resolved critical issues and bugs effectively, contributing to stable and error-free application deployments
• Teamed with developers to implement UI and business logic for an app, resetting the client machine drive to its original state on reboots.