Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

14 years of enterprise backend engineering across fintech, healthtech, and AI, not as a generalist, but as someone who went deep in each. My foundation was built at i2c inc., one of the world's leading fintech SaaS platforms, where I spent nearly a decade growing from engineer to Solutions Architect. I worked on PCI-DSS compliant card issuing systems, payment gateway integrations (Visa, Mastercard, Apple Pay, Google Pay), BNPL platforms, and multi-portal enterprise suites all at a scale most engineers only read about. From there, I moved into healthtec, building Epic FHIR integrations, PHI-compliant architectures, multi-tenant microservices, and a Patient Preventive Care Analytics engine that helps insurers make sense of population health data. And more recently, into AI, engineering a multi-tenant matching engine on AWS Bedrock with pgvector, dynamic schema versioning, and composite vector search that serves multiple enterprise clients from a single deployment. My core is Java and Spring Boot. My infrastructure is AWS. My architecture instinct is microservices, event-driven, observable, and built to outlast the team that built them. I don't take on work to deliver code. I take it on to solve the problem behind the ticket. AWS Certified Solutions Architect · MSc Computer Science · 14 Years Enterprise Experience…14 years of enterprise backend engineering across fintech, healthtech, and AI, not as a generalist, but as someone who went deep in each. My foundation was built at i2c inc., one of the world's leading fintech SaaS platforms, where I spent nearly a decade growing from engineer to Solutions Architect. I worked on PCI-DSS compliant card issuing systems, payment gateway integrations (Visa, Mastercard, Apple Pay, Google Pay), BNPL platforms, and multi-portal enterprise suites all at a scale most engineers only read about. From there, I moved into healthtec, building Epic FHIR integrations, PHI-compliant architectures, multi-tenant microservices, and a Patient Preventive Care Analytics engine that helps insurers make sense of population health data. And more recently, into AI, engineering a multi-tenant matching engine on AWS Bedrock with pgvector, dynamic schema versioning, and composite vector search that serves multiple enterprise clients from a single deployment. My core is Java and Spring Boot. My infrastructure is AWS. My architecture instinct is microservices, event-driven, observable, and built to outlast the team that built them. I don't take on work to deliver code. I take it on to solve the problem behind the ticket. AWS Certified Solutions Architect · MSc Computer Science · 14 Years Enterprise Experience

Rizwan Munir

Full Stack Developer, Back-End Developer, Web Developer, +5





14 years of enterprise backend engineering across fintech, healthtech, and AI, not as a generalist, but as someone who went deep in each. My foundation was built at i2c inc., one of the world's leading fintech SaaS platforms, where I spent nearly a decade growing from engineer to Solutions Architect. I worked on PCI-DSS compliant card issuing systems, payment gateway integrations (Visa, Mastercard, Apple Pay, Google Pay), BNPL platforms, and multi-portal enterprise suites all at a scale most engineers only read about. From there, I moved into healthtec, building Epic FHIR integrations, PHI-compliant architectures, multi-tenant microservices, and a Patient Preventive Care Analytics engine that helps insurers make sense of population health data. And more recently, into AI, engineering a multi-tenant matching engine on AWS Bedrock with pgvector, dynamic schema versioning, and composite vector search that serves multiple enterprise clients from a single deployment. My core is Java and Spring Boot. My infrastructure is AWS. My architecture instinct is microservices, event-driven, observable, and built to outlast the team that built them. I don't take on work to deliver code. I take it on to solve the problem behind the ticket. AWS Certified Solutions Architect · MSc Computer Science · 14 Years Enterprise Experience…14 years of enterprise backend engineering across fintech, healthtech, and AI, not as a generalist, but as someone who went deep in each. My foundation was built at i2c inc., one of the world's leading fintech SaaS platforms, where I spent nearly a decade growing from engineer to Solutions Architect. I worked on PCI-DSS compliant card issuing systems, payment gateway integrations (Visa, Mastercard, Apple Pay, Google Pay), BNPL platforms, and multi-portal enterprise suites all at a scale most engineers only read about. From there, I moved into healthtec, building Epic FHIR integrations, PHI-compliant architectures, multi-tenant microservices, and a Patient Preventive Care Analytics engine that helps insurers make sense of population health data. And more recently, into AI, engineering a multi-tenant matching engine on AWS Bedrock with pgvector, dynamic schema versioning, and composite vector search that serves multiple enterprise clients from a single deployment. My core is Java and Spring Boot. My infrastructure is AWS. My architecture instinct is microservices, event-driven, observable, and built to outlast the team that built them. I don't take on work to deliver code. I take it on to solve the problem behind the ticket. AWS Certified Solutions Architect · MSc Computer Science · 14 Years Enterprise Experience

Available to hire

14 years of enterprise backend engineering across fintech, healthtech, and AI, not as a generalist, but as someone who went deep in each.
My foundation was built at i2c inc., one of the world’s leading fintech SaaS platforms, where I spent nearly a decade growing from engineer to Solutions Architect. I worked on PCI-DSS compliant card issuing systems, payment gateway integrations (Visa, Mastercard, Apple Pay, Google Pay), BNPL platforms, and multi-portal enterprise suites all at a scale most engineers only read about.
From there, I moved into healthtec, building Epic FHIR integrations, PHI-compliant architectures, multi-tenant microservices, and a Patient Preventive Care Analytics engine that helps insurers make sense of population health data. And more recently, into AI, engineering a multi-tenant matching engine on AWS Bedrock with pgvector, dynamic schema versioning, and composite vector search that serves multiple enterprise clients from a single deployment.
My core is Java and Spring Boot. My infrastructure is AWS. My architecture instinct is microservices, event-driven, observable, and built to outlast the team that built them.
I don’t take on work to deliver code. I take it on to solve the problem behind the ticket.
AWS Certified Solutions Architect · MSc Computer Science · 14 Years Enterprise Experience

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Work Experience

Lead Backend Software Engineer at BYOUR

February 1, 2026 - May 1, 2026

Built a standalone multi-tenant AI matching engine with isolated data and API key-based authentication; implemented a dynamic schema registration system with tenant-defined matching criteria and intelligent versioning; ingested entities using Bedrock Titan Embed v2 with composite vector storage in PostgreSQL (pgvector); exposed a match endpoint with per-query weight overrides and hard filters; built an async rehydration system for breaking schema changes with job tracking and zero-downtime search via real-time coverage metadata; developing backend for BYOUR freelancing platform (Users, Profile, Project workflow, Chat); created a custom Spring Boot OAuth2 opaque token authserver; designed a domain adapter for scoring engine; CV processing pipeline using AWS Textract and Bedrock.

Advisory Software Engineer at Bitlogix

July 1, 2024 - Present

Designed and implemented integration between the healthcare platform and Epic Systems using OAuth 2.0 and FHIR APIs; introduced tenant isolation by deploying dedicated microservice instances and databases backed by SQS for a high-traffic client; led architecture design and reviews and optimized code for production-grade reliability on AWS; designed and built a scalable Patient Preventive Care Analytics microservice to analyze screening and preventive care metrics; led MeU Platform Budget Management module; standardized AWS Secrets Manager integration with Spring Boot services; revamped legacy reporting engine for improved performance (8x faster) via modern Java features, SQL tuning, denormalization, indexing and caching; automated recurring operational processes via cron-based scheduling; migrated a monolithic legacy web app to a microservices distributed architecture.

Java Consultant at SeeThruTec

February 1, 2024 - July 1, 2024

Implemented Solutions Review Board for architectural decision governance; developed multi-cloud augmentation with Spring Boot microservice enabling secure storage of attachments using AWS S3 and Azure Blob Storage; integrated with Azure Key Vault and multi-tenancy; built high-performance Global Search Service using Spring Boot and Elasticsearch; core developer of Case Manager platform in Fraud, Waste & Abuse domain using Kafka-based Event-Driven architecture; collaborated with cross-functional teams to deliver scalable microservices on Azure cloud.

Solutions Architect / Business Analyst at i2c inc.

January 1, 2020 - January 1, 2024

Conducted impact analyses for client-requested enhancements, identifying effects on integrations and workflows; translated business goals into Solution Requirement Documents (SRDs) and Functional Specifications (FSDs); ensured client deliverables aligned with timelines; ensured PCI DSS compliance across payment modules and card management; contributed to card issuing lifecycle processes; integrated with payment gateways and card provisioning platforms (Plaid, Benefit Pay, Interac, Fetch, Google Pay, Apple Pay, Samsung Pay).

Senior / Principal Software Engineer at i2c inc.

January 1, 2015 - December 1, 2019

Led a SaaS PCI DSS compliant fintech platform; championed OWASP-aware development; delivered key modules for Incident Case Management (ICM) including cardholder communications; built real-time branding tool (CMS 3.0) with versioning, scheduling and status-based revisions; developed core BNPL portal components; contributed to multiple enterprise portals; led the CHolder migration from 2.0 to 3.0 with zero-downtime blue-green rollout and ongoing feature work (Expense Analyzer, Multi-Purse Management, Card Activity).

Software Engineer at Wateen Telecom

April 1, 2013 - May 1, 2015

Contributed to USSD-based branchless banking platform serving underbanked populations; backend transaction processing via Apache MINA; web Admin Portal built with Spring MVC, Hibernate and Oracle DB for configuration, management and reporting; supported branchless banking operations for JS Bank, Askari Bank's Timepey, and Bank of Punjab flood relief disbursement program.

Software Engineer at i2c inc.

June 1, 2011 - March 1, 2013

Contributed to Discover Network Loyalty Platform; developed Offers Batch Upload, User Management, Roles and Campaign Message Editor; performed performance optimization and code refactoring; supported Loyalty Consumer Portal; provided technical training on reusable components for other teams.