I am a results-driven Full Stack Developer with 10+ years of experience delivering enterprise-grade banking and payment systems. I have strong expertise in ISO 20022, SWIFT messaging, and MEPS+, with hands-on experience in Node.js, React.js, Python, and .NET technologies. I excel at designing scalable APIs, integrating message-driven systems like IBM MQ, and supporting high-availability financial applications. I am comfortable with both development and production support, ensuring reliability and operational stability in mission-critical banking environments.…

Percis Gollamanda

I am a results-driven Full Stack Developer with 10+ years of experience delivering enterprise-grade banking and payment systems. I have strong expertise in ISO 20022, SWIFT messaging, and MEPS+, with hands-on experience in Node.js, React.js, Python, and .NET technologies. I excel at designing scalable APIs, integrating message-driven systems like IBM MQ, and supporting high-availability financial applications. I am comfortable with both development and production support, ensuring reliability and operational stability in mission-critical banking environments.…

Available to hire

I am a results-driven Full Stack Developer with 10+ years of experience delivering enterprise-grade banking and payment systems. I have strong expertise in ISO 20022, SWIFT messaging, and MEPS+, with hands-on experience in Node.js, React.js, Python, and .NET technologies.

I excel at designing scalable APIs, integrating message-driven systems like IBM MQ, and supporting high-availability financial applications. I am comfortable with both development and production support, ensuring reliability and operational stability in mission-critical banking environments.

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Skills

Experience Level

.NET
Expert
ASP.NET
Expert
C#
Expert
SQL
Expert
React JS
Expert
Node.js
Expert
JavaScript
Expert
Oracle
Expert
Java
Expert
HTML5
Expert
AngularJS
Expert
jQuery
Expert
Bootstrap
Expert
GitHub
Expert
Express
Expert
Jira
Expert
Docker
Expert
Python
Expert
Azure
Expert
Selenium
Expert
API
Expert
TypeScript
Expert
XML
Expert
Kubernetes
Intermediate
CSS
Intermediate
MySQL
Intermediate
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Language

English
Fluent

Work Experience

Senior Full Stack Developer at Mizuho Bank
December 1, 2017 - Present
Senior Full Stack Developer responsible for ISO 20022 migration and MEPS+ISO 20022 interoperability. Designed and developed full-stack applications using ASP.NET, C#, JavaScript, and SQL Server. Implemented XML parsers and validation logic for ISO 20022 messages, created MX-to-MT translation workflows, enhanced the scheduler for MX message processing, and supported UAT/SIT tests. Contributed to business continuity planning for RTGS/MEPS and built dashboards to monitor message volumes and statuses.
Senior Full Stack Developer at Mizuho Bank, Singapore
December 1, 2017 - Present
Senior Full Stack Developer responsible for ISO 20022 migration and cross-border payments. Developed and maintained full stack applications using ASP.NET, C#, JavaScript, and SQL Server. Implemented ISO 20022 message validation and MX to MT translations, XML parsers, and BIC handling during UAT. Worked with cross-functional teams to ensure interoperability with global banks, enhanced business continuity for MEPS/RTGS, and supported industry testing activities.
Senior Full Stack Developer at Mizuho Bank, Singapore
December 1, 2017 - Present
Contributed to the development and maintenance of full stack applications using ASP.NET, C#, JavaScript, and SQL Server. Designed and developed web applications to save, approve, validate, and display ISO 20022-compliant payment messages. Implemented XML parsers and validation logic for ISO 20022 messages using .NET XML libraries, extracting key payment fields. Created SQL queries and stored procedures for payment data retrieval and reports. Enhanced schedulers and implemented BIC replacement during UAT phases. Performed MX–MT translations using SWIFT libraries and collaborated with business units during UAT phases. Participated in ISO 20022 migration initiatives with industry, UAT, and SIT testing. Implemented Business Continuity Planning systems for MASNET (RTGS for MEPS). Contributed to developing METIS, a web-based application replacing the legacy securities booking system with various modules for bonds and loan management.
Software Engineer at STATS ChipPAC
August 1, 2017 - September 16, 2025
Developed Elogsheet to track manufacturing stages for auditability and traceability. Implemented end-to-end full-stack features for process data capture, UI/workflow logic, and real-time status displays. Built the MC FOUP Control System with lot validation to prevent invalid FOUP usage and automated processing halts on invalid data, ensuring operational integrity.
.Net Developer at STATS ChipPAC, Singapore
August 1, 2017 - September 16, 2025
Developed Elogsheet to track manufacturing processes and implemented FOUP control and LOT validation logic. Built web-based interfaces and workflow logic, enabling real-time validations and reducing errors.
.Net Developer at STATS Chip, Singapore
August 1, 2017 - August 11, 2025
Developed Elogsheet, a web-based application to track and log manufacturing process stages for audit and investigation, implementing automatic data saving for traceability and reduced manual entry. Contributed full stack development including UI design, database integration, and workflow management. Developed the MC FOUP Control System to prevent invalid FOUP usage on semiconductor lines by implementing lot validation and automatic processing halts on mismatches. Designed user-friendly front-end interfaces to display real-time validation results to operators.
Software Engineer at Accenture Services Pvt. Ltd
November 1, 2013 - September 16, 2025
MSMBSITS (Microsoft Business Solutions) – 24x7 production support for Microsoft Dynamics AX. Performed Level 2 support, patching, incident management, and SOP/documentation. Managed DB, web server, and process server issues across production and pre-production environments, ensuring SLA adherence and high availability.
Software Engineer at Accenture Services Pvt. Ltd
November 1, 2013 - September 16, 2025
MSMBSITS support for Microsoft Dynamics AX and related enterprise applications. Provided 24x7 production support, incident management, regular patching, and documentation for SOPs and knowledge transfer.
Software Engineer at Accenture Services Pvt. Ltd, India
November 1, 2013 - August 11, 2025
Provided 24x7 production support for critical Microsoft business applications including VOICE, NBE, C/CAPS, and Axapta (Microsoft Dynamics AX). Acted as Level 2 Support Analyst, troubleshooting and resolving database, web server, and process server issues across production and pre-production environments. Performed regular patching and rebooting of Windows production servers to minimize downtime. Managed incident resolution and root cause analysis collaborating with infrastructure and development teams. Delivered timely Level 2 service request solutions ensuring minimal disruption and compliance with SLAs. Maintained documentation including SOPs and issue resolution logs.
.Net Developer at SCCL (IT-Dept)
June 1, 2008 - September 16, 2025
Led the development of a web-based ledger processing and reconciliation system to support monthly marketing reconciliations. Implemented Journal Voucher (JV) module with data entry validations, import of distributed ledger data, and generation of reconciliation reports for audits.
.Net Programmer at SCCL(IT-Dept), India
June 1, 2008 - September 16, 2025
Developed a web-based ledger processing and reconciliation system, including Journal Voucher module, data entry screens with validations, data import from Areas, and custom reports for monthly audits and reconciliations.
.Net Developer at SCCL (IT-Dept), India
June 1, 2008 - August 11, 2025
Developed a web-based ledger processing and reconciliation system to support monthly reconciliation of coal purchase and customer accounts. Designed and implemented the Journal Voucher module with data entry and validation screens to streamline ledger adjustments and corrections. Developed functionality to import financial data for seamless integration into the central system. Generated custom financial reports in text file format to support audits, verification, and reconciliation activities.

Education

Bachelor of Technology in Computer Science and Engineering at SVECW
June 3, 2002 - April 28, 2006

Qualifications

Bachelor of Technology in Computer Science and Engineering
January 1, 2002 - January 1, 2006
Microsoft Certified: Azure Developer Associate (AZ-204)
January 11, 2030 - July 1, 2026
DevOps Engineer Expert (AZ-400)
February 6, 2026 - February 7, 2027

Industry Experience

Financial Services, Manufacturing, Software & Internet, Professional Services, Media & Entertainment, Other
    ISO 20022 Migration & Cross-Border Payments

    ISO 20022 Migration & Cross-Border Payments and MEPS+ISO 20022 (Like-for-Like++).
    Enterprise Payment Processing System is a banking payment platform developed to support ISO 20022-compliant payment processing, SWIFT integration, and MEPS+ transaction workflows. The application enables secure payment processing, system integrations, real-time messaging through IBM MQ, and centralized transaction management with high availability and operational stability. Built using ASP.NET, C#, JavaScript, REST APIs, Oracle, and SQL technologies, the platform supports critical banking operations, production support, and payment message validation enhancements including pacs.008 processing.

    Role & Responsibilities:
    • Built full-stack payment applications (.NET 8, .NET Core, JS, Oracle) with ISO 20022 compliance.
    • Designed and implemented secure RESTful APIs for seamless system integration.
    • Optimized performance by identifying bottlenecks and implementing efficient solutions.
    • Troubleshot and resolved production issues, ensuring minimal downtime and system stability.
    • Participated in the full SDLC (design, development, testing, deployment) and collaborated with cross-functional teams to deliver solutions.
    • Designed and managed SQL databases, ensuring data integrity and optimized performance
    • Provided technical guidance and support to junior developers, improving team capability.
    • Integrated IBM MQ and supported SWIFT (AMH, SAA) / MEPS+ payment processing.
    • Contributed to MEPS+ 2026 upgrade, enhancing pacs.008 message validation logic

    Securities & Money Booking System (Oberon Replacement):

    Securities & Money Booking System (Oberon Replacement): Securities & Money Booking System (Oberon Replacement) is a full-stack banking platform developed for securities trading and money/loan booking operations. The application supports customer onboarding, KYC/compliance workflows, bond trading, loan booking, and rate fixing with maker-checker style validations and centralized workflow management. Built using React.js, Node.js, REST APIs, and Oracle, the platform integrates secure authentication, reporting, and microservices-based banking workflows.
    Role & Responsibilities:
    • Developed a full-stack banking application (React.js, Node.js, Oracle) for securities trading and money/loan booking with JWT-based authentication and RBAC
    • Implemented Entity Management module to maintain customer (bond client) data with lifecycle states (PENDING, VERIFIED, ACTIVE)
    • Built KYC/Compliance workflow to validate customer identity using document verification before enabling financial transactions
    • Built core modules such as Bond Trading, Loan Booking, and Rate Fixing, enforcing validations to allow transactions only for verified customers
    • Implemented layered RESTful APIs and reporting features, enabling centralized management of customer data, workflows, and financial transactions (aligned with Viewpoint-style systems)