Available to hire
Hi, I’m Percis Gollamandala, a Senior Full Stack Developer with over 10 years of experience building enterprise web applications using Node.js, React.js, Python, and Microsoft .NET technologies. I enjoy designing elegant front-end interfaces and robust back-end services, and I thrive in collaborative environments that tackle complex payment systems and financial messaging.
I have hands-on experience with test-driven development, industry-wide testing phases for ISO 20022 migrations, and observability practices using dashboards with Grafana, Prometheus, and Kafka. I’m passionate about delivering scalable, high-performance solutions that improve processing accuracy and ensure business continuity in high-availability banking environments.
Skills
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Experience Level
Language
English
Advanced
Work Experience
Senior Full Stack Developer at Mizuho Bank, Singapore
December 1, 2017 - PresentContributed 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.
.Net Developer at STATS Chip, Singapore
August 1, 2017 - August 11, 2025Developed 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, India
November 1, 2013 - August 11, 2025Provided 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), India
June 1, 2008 - August 11, 2025Developed 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.
Senior Full Stack Developer at Mizuho Bank, Singapore
December 1, 2017 - PresentSenior 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.
.Net Developer at STATS ChipPAC, Singapore
August 1, 2017 - September 16, 2025Developed 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.
Software Engineer at Accenture Services Pvt. Ltd
November 1, 2013 - September 16, 2025MSMBSITS support for Microsoft Dynamics AX and related enterprise applications. Provided 24x7 production support, incident management, regular patching, and documentation for SOPs and knowledge transfer.
.Net Programmer at SCCL(IT-Dept), India
June 1, 2008 - September 16, 2025Developed 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.
Senior Full Stack Developer at Mizuho Bank
December 1, 2017 - PresentSenior 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.
Software Engineer at STATS ChipPAC
August 1, 2017 - September 16, 2025Developed 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.
Software Engineer at Accenture Services Pvt. Ltd
November 1, 2013 - September 16, 2025MSMBSITS (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.
.Net Developer at SCCL (IT-Dept)
June 1, 2008 - September 16, 2025Led 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.
Senior Full Stack Developer at Mizuho Bank, Singapore
August 1, 2025 - September 16, 2025Contributed to the development and maintenance of full-stack applications using ASP.NET, C#, JavaScript, and SQL Server. Designed and implemented ISO 20022-compliant payment messaging workflows for cross-border settlements, including parsing and validation of messages, extraction of debtor/creditor details, IBAN, BIC, and amounts. Developed XML parsers and validation logic using .NET libraries (XDocument, XmlReader, XmlSchemaSet). Created SQL queries and stored procedures on Oracle to retrieve payment data, generate reconciliation reports, and support reporting. Enhanced the message processing scheduler to load and process MX/MT message instances, and implemented BIC replacement logic during UAT. Performed MX–MT translations with SWIFT stand-alone libraries (pacs.008 → MT103) and collaborated with business units for UAT/SIT testing. Participated in ISO 20022 migration initiatives, ensuring interoperability with global banks, and contributed to Business Continuity Planning (BCP) for
Software Engineer at STATS ChipPAC
August 1, 2017 - September 16, 2025Developed Elogsheet, a web-based application to track and log each production stage for audit purposes; implemented automatic data capture at each stage to improve traceability and reduce manual entry. Contributed to full-stack development including UI, database integration, and workflow logic. Created the MC FOUP Control System to prevent invalid FOUP usage on semiconductor lines; implemented LOT validation to ensure all required process parameters were met; integrated automated checks to halt LOT processing on invalid information; built clear UI to display real-time validation results and status messages for operators.
Software Engineer at Accenture Services Pvt. Ltd
November 1, 2013 - September 16, 2025Provided 24x7 production support for Microsoft Dynamics AX-related applications (VOICE, NBE, C/CAPS). Served as Level 2 support, troubleshooting databases, web servers, and process servers across production and pre-production environments. Performed regular patching and reboots of Windows servers to maintain health and uptime. Managed incidents, performed root cause analysis, and collaborated with infrastructure and development teams to resolve recurring issues. Maintained SOP documentation and knowledge transfer artifacts.
.Net Developer at SCCL (IT-Dept)
June 1, 2008 - September 16, 2025Developed a web-based ledger processing and reconciliation system to support the marketing department’s monthly reconciliation of coal purchase and customer accounts. Designed and implemented the Journal Voucher (JV) module, including data entry screens with validations to streamline ledger adjustments and manual corrections. Developed functionality to import financial data from the “Areas” module, enabling seamless integration of distributed ledger inputs into the central system. Generated custom financial reports in text file format for JV entries to support monthly audits, account verification, and reconciliation activities. Created UI screens and reports to facilitate ledger and reconciliation workflows.
Senior Full Stack Developer at Mizuho Bank, Singapore
December 1, 2017 - PresentContributed to the development and maintenance of full stack applications using ASP.NET, C#, JavaScript, and SQL Server. Implemented ISO 20022 migration and cross-border payments support, designed and developed web applications to validate ISO 20022 messages, created XML parsers, built MX-to-MT translation, and enhanced business continuity planning for RTGS/MEPS, with focus on interoperability with global correspondent banks.
.Net Developer at STATS ChipPAC, Singapore
August 1, 2017 - October 11, 2025Developed Elogsheet and MC FOUP Control System for manufacturing process tracking and FOUP validation; implemented LOT validation logic; contributed to UI/UX and workflow logic for real-time validation; built front-end interfaces to display statuses; involved in end-to-end development.
Software Engineer at Accenture Services Pvt. Ltd
November 1, 2013 - October 11, 2025Provided 24x7 production support for Microsoft Dynamics AX-based applications; performed incident management, root cause analysis, patching and server maintenance; supported Level 2 issues and documented SOPs.
.Net Developer at SCCL (IT-Dept)
June 1, 2008 - October 11, 2025Developed a web-based ledger processing and reconciliation system; implemented Journal Voucher module, data import from Areas module, and generated custom reports; supported monthly audits and reconciliations.
Senior Full Stack Developer at Mizuho Bank, Singapore
December 1, 2017 - PresentContributed to the development and maintenance of full stack applications using ASP.NET, C#, JavaScript, and SQL Server. Implemented ISO 20022 migration efforts, MX message processing, XML parsing/validation, and MX–MT translations. Enhanced business continuity for MEPS/RTGS cross-border payments and built dashboards to monitor message processing and statuses. Collaborated with business units during UAT/SIT testing and supported go-live activities.
.Net Developer at STATS ChipPAC, Singapore
August 1, 2017 - October 11, 2025Developed Elogsheet and MC FOUP Control System for manufacturing processes, including LOT validation and real-time status displays. Led full-stack development, UI design, database integration, and workflow logic to ensure traceability and regulatory compliance.
Software Engineer at Accenture Services Pvt. Ltd
November 1, 2013 - October 11, 2025Provided 24x7 production support for Microsoft Dynamics AX-based solutions; performed incident management, root-cause analysis, patching, and server maintenance. Collaborated with infrastructure and development teams to resolve recurring issues and ensured SLAs were met.
.Net Developer at SCCL (IT-Dept), India
June 1, 2008 - October 11, 2025Developed web-based ledger processing and reconciliation system, including Journal Voucher module, imports from Areas module, and custom financial reporting to support monthly audits and reconciliations.
Senior Full Stack Developer at Mizuho Bank, Singapore
December 1, 2017 - October 28, 2025Contributed to ISO 20022 Migration & Cross-Border Payments and MEPS+ISO 20022 migration initiatives. Developed full-stack applications using ASP.NET, C#, JavaScript, and SQL Server. Implemented XML parsers and validation logic for ISO 20022 messages (XDocument, XmlReader, XmlSchemaSet) to extract debtor/creditor names, IBAN, BIC, and amounts. Wrote Oracle SQL queries and stored procedures to generate reconciliation and payment data reports. Enhanced the scheduler to load and process MX message instances, and performed MX–MT translations (pacs.008 → MT103) using SWIFT libraries. Built UIs and dashboards to monitor message processing and transaction statuses. Supported ISO 20022 industry testing, UAT, and SIT; contributed to Business Continuity Planning for MASNET RTGS.
.Net Developer at STATS ChipPAC
August 1, 2017 - August 1, 2017Developed Elogsheet, a web-based application to track manufacturing stages for audit and traceability. Implemented auto-save at each stage, increasing data integrity. Contributed to the MC FOUP Control System to prevent invalid FOUP usage; added LOT validation and automated HALT on invalid FOUP information. Designed front-end UI to display real-time validation results and status messages; integrated with backend validation and workflow logic.
Software Engineer at Accenture Services Pvt. Ltd
November 1, 2013 - November 1, 2013MSMBSITS (Microsoft Business Solutions) Production support for VOICE, NBE, C/CAPS, Axapta; Level 2 support; patching & rebooting Windows servers; incident management; root cause analysis; maintained SOPs; ensured SLAs.
.Net Developer at SCCL (IT-Dept), India
June 1, 2008 - June 1, 2008Developed web-based ledger processing and reconciliation system for coal marketing; implemented Journal Voucher module; data import from Areas module; generated custom financial reports; supported monthly audits and reconciliation.
.Net Developer at STATS ChipPAC, Singapore
March 1, 2016 - August 1, 2017Developed Elogsheet web-based application to track production stages for audit purposes, with automatic data saving at each stage to enable traceability. Contributed to the MC FOUP Control System, implementing LOT validation and automatic halting of processing on invalid/mismatched FOUP data. Designed clean front-end interfaces to display real-time validation results and status messages for operators.
Software Engineer at Accenture Services Pvt. Ltd
July 1, 2008 - November 1, 2013Provided 24x7 production support for Microsoft Dynamics AX-related applications, served as a Level 2 support analyst, performed regular patching and server maintenance, and conducted incident management and root-cause analysis. Created SOPs and maintained issue resolution logs to support knowledge transfer and SLA adherence.
.Net Developer at SCCL (IT-Dept), India
May 1, 2006 - June 1, 2008Developed a web-based ledger processing and reconciliation system for monthly marketing reconciliations. Implemented the Journal Voucher module with validations, imported data from the Areas module, and generated custom financial reports for audits and reconciliation.
Education
Qualifications
Bachelor of Technology in Computer Science and Engineering
January 1, 2002 - January 1, 2006PRO: Designing Database Solutions by Using Microsoft SQL Server™ 2005
January 11, 2030 - August 11, 2025TS: Windows Applications Development with Microsoft .NET Framework 4
January 11, 2030 - August 11, 2025TS: Microsoft .NET Framework - Application Development Foundation
January 11, 2030 - August 11, 2025TS: Windows Communication Foundation Development with Microsoft .NET Framework 4
January 11, 2030 - August 11, 2025Bachelor of Technology in Computer Science and Engineering
January 1, 2002 - January 1, 2006Designing Database Solutions by Using Microsoft SQL Server 2005
January 11, 2030 - September 16, 2025Windows Applications Development with Microsoft .NET Framework 4
January 11, 2030 - September 16, 2025Microsoft .NET Framework - Application Development Foundation
January 11, 2030 - September 16, 2025Windows Communication Foundation Development with Microsoft .NET Framework 4
January 11, 2030 - September 16, 2025Bachelor of Technology
January 1, 2002 - January 1, 2006Designing Database Solutions by Using Microsoft SQL Server 2005
January 11, 2030 - September 16, 2025Windows Applications Development with Microsoft .NET Framework 4
January 11, 2030 - September 16, 2025Microsoft .NET Framework - Application Development Foundation
January 11, 2030 - September 16, 2025Windows Communication Foundation Development with Microsoft .NET Framework 4
January 11, 2030 - September 16, 2025Bachelor of Technology in Computer Science and Engineering
January 1, 2002 - January 1, 2006Designing Database Solutions by Using Microsoft SQL Server 2005
January 11, 2030 - September 16, 2025Windows Applications Development with Microsoft .NET Framework 4
January 11, 2030 - September 16, 2025Microsoft .NET Framework - Application Development Foundation
January 11, 2030 - September 16, 2025Windows Communication Foundation Development with Microsoft .NET Framework 4
January 11, 2030 - September 16, 2025Bachelor of Technology in Computer Science and Engineering
January 1, 2002 - January 1, 2006Designing Database Solutions by Using Microsoft SQL Server 2005
January 11, 2030 - October 11, 2025Windows Applications Development with Microsoft .NET Framework 4
January 11, 2030 - October 11, 2025Microsoft .NET Framework - Application Development Foundation
January 11, 2030 - October 11, 2025Windows Communication Foundation Development with Microsoft .NET Framework 4
January 11, 2030 - October 11, 2025Bachelor of Technology in Computer Science and Engineering
January 1, 2002 - January 1, 2006Designing Database Solutions by Using Microsoft SQL Server 2005
January 11, 2030 - October 11, 2025Windows Applications Development with Microsoft .NET Framework 4
January 11, 2030 - October 11, 2025Microsoft .NET Framework - Application Development Foundation
January 11, 2030 - October 11, 2025Windows Communication Foundation Development with Microsoft .NET Framework 4
January 11, 2030 - October 11, 2025Bachelor of Technology in Computer Science and Engineering
January 1, 2002 - January 1, 2006Designing Database Solutions by Using Microsoft SQL Server 2005
January 11, 2030 - October 28, 2025Windows Applications Development with Microsoft .NET Framework 4
January 11, 2030 - October 28, 2025Windows Applications Development with Microsoft .NET Framework 4
January 11, 2030 - October 28, 2025Windows Communication Foundation Development with Microsoft .NET Framework 4
January 11, 2030 - October 28, 2025Bachelor of Technology in Computer Science and Engineering
January 1, 2002 - January 1, 2006Designing Database Solutions by Using Microsoft SQL Server 2005
January 11, 2030 - December 4, 2025Windows Applications Development with Microsoft .NET Framework 4
January 11, 2030 - December 4, 2025Microsoft .NET Framework - Application Development Foundation
January 11, 2030 - December 4, 2025Industry Experience
Financial Services, Manufacturing, Software & Internet, Professional Services, Media & Entertainment, Other
Skills
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Experience Level
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