Backend-heavy Software Engineer building reliable fintech systems
I'm a Software Engineer with 6+ years of experience building scalable APIs, transaction processing workflows, fraud/risk systems, and cloud-based backend services using Node.js, NestJS, TypeScript, PostgreSQL, AWS, and Kubernetes.
API Layer
REST / GraphQL
Transaction Processing
SWIFT / ACH
Fraud Rules Engine
Real-time Risk
PostgreSQL
Data Layer
AWS / Kubernetes
Infrastructure
Audit Logs
Traceability & Compliance
Backend experience where reliability matters
6+ years
Building production software across fintech, financial services, and transaction-driven platforms.
Financial systems
Experience with SWIFT flows, ACH transfers, fraud/risk systems, reconciliation, auditability, and compliance-driven workflows.
Business impact
Built systems that helped grow users from 3k to 30k, increased retention by 20%, and reduced audit alerts by 100%.
What I bring to engineering teams
I specialize in backend-heavy software engineering for systems where reliability, data consistency, traceability, and business impact matter.
My work has focused on financial transaction flows, fraud/risk systems, scalable APIs, backend architecture, and cloud-based services.
Backend Engineering
Scalable APIs, service design, transaction processing, validation, error handling, and backend architecture.
Financial Systems
SWIFT transfers, ACH workflows, fraud/risk systems, reconciliation, auditability, and compliance-driven workflows.
Cloud & Infrastructure
AWS, Kubernetes, AWS Lambda, Docker, cloud-based services, and production-ready deployments.
Product & Business Impact
Engineering work connected to user growth, retention, fraud prevention, stakeholder needs, and operational reliability.
Selected backend case studies
A few examples of the systems, workflows, and backend problems I've worked on.
SWIFT Transaction Processing Flows
Problem
Financial transfer operations require reliable transaction flows, traceability, compliance, validation, reconciliation, and error handling.
My Role
Designed and implemented backend flows for SWIFT inbound and outbound transactions.
Technical Solution
Built backend workflows to support transaction validation, reconciliation, error handling, auditability, and operational traceability.
Impact
Supported more reliable and traceable national transfer operations.
Technologies
Real-Time Fraud Rules Engine
Problem
Risk and compliance teams need flexible ways to evaluate fraud conditions and detect suspicious activity earlier without creating rigid backend logic.
My Role
Developed a real-time fraud rules engine for dynamic risk rule evaluation.
Technical Solution
Built backend logic to evaluate configurable fraud rules in real time while supporting maintainability, traceability, and auditability.
Impact
Helped support early suspicious activity detection while reducing false positives.
Technologies
Referral & Gamification Growth Systems
Problem
A fintech product needed backend systems to support user growth, retention, referral fraud prevention, and dynamic engagement programs.
My Role
Built referral, gamification, and fraud filtering backend systems.
Technical Solution
Implemented a referral program, a dynamic gamification system, and an AWS Lambda fraud filtering process.
Impact
Increased users from 3k to 30k, improved retention by 20%, and reduced referral audit alerts by 100%.
Technologies
Recent experience
Software Engineer
QiBit
Feb 2025 – Present
Chile · Remote
Backend financial systems, SWIFT flows, transaction processing, fraud/risk systems, traceability, and compliance-driven workflows.
- •Designed and implemented SWIFT inbound and outbound transaction flows.
- •Built backend services for financial transaction processing, validation, reconciliation, error handling, and auditability.
- •Developed a real-time fraud rules engine to evaluate dynamic risk rules.
- •Collaborated with product, risk, and compliance stakeholders.
Software Engineer
Zigi App
Mar 2023 – May 2024
Guatemala · Remote
Fintech backend systems for user growth, retention, fraud prevention, and ACH transfer capabilities.
- •Developed a referral program that increased users from 3k to 30k.
- •Designed and implemented a dynamic gamification system that increased retention by 20%.
- •Built an AWS Lambda fraud filtering process that reduced audit alerts by 100%.
- •Led backend delivery for an ACH transfer module.
Software Engineer
Aurora Studio
Nov 2019 – Feb 2023
United States · Remote
Software solutions across microservices-based platforms, real-time communication systems, credit simulation tools, and third-party integrations.
- •Designed and implemented a microservices-based collectible card platform.
- •Built a real-time chat system.
- •Implemented a credit simulator capable of supporting more than 50,000 vehicles.
- •Integrated third-party APIs including Google Maps, Stripe, and Shopify.
Technologies I work with
Backend
Databases
Cloud & DevOps
Frontend
Testing & Tools
Technical writing & learning
I like strengthening my engineering fundamentals and sharing notes around backend systems, distributed systems, and software architecture.
Looking for a backend-heavy Software Engineer?
I'm open to remote Software Engineer roles where I can contribute to backend systems, fintech products, APIs, transaction processing, fraud/risk systems, and scalable production software.