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Building Scalable APIs in Go
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Software Consultant
Building backend systems
that survive production.
8+ years of experience building fintech, payment, distributed, and backend systems across Go, PHP/Laravel, Node.js, AWS, MySQL, RabbitMQ, and microservices.
8+ Years
Engineering Experience
Go & PHP
Core Stack
Fintech
Payment Systems
Backend
Distributed Systems
Engineering Narrative & Advisory
Software Consultant & Systems Engineer
8+ years of production experience building, optimizing, and operating critical fintech and payment systems.
Production Engineering & Technical Advisory
As an independent Software Consultant, I specialize in architecting backend microservices, optimizing payment processing reliability, and tackling complex production bottlenecks. Over 8+ years of engineering experience, I design fault-tolerant event-driven workflows, profile service memory leaks, and streamline transaction systems.
GolangPHP / LaravelNode.jsAWSMicroservicesFintech & PaymentsRabbitMQProduction Troubleshooting
Hands-on Technical Leadership
LeadLeadership & Execution
Technical Team Leadership
Hands-on team leadership, sprint planning, and breaking down complex specs into actionable engineering tasks.
DesignDistributed Systems
System & Architecture Design
Architecting resilient microservices, high-throughput payment pipelines, and scalable database schemas.
ReviewQuality Engineering
Code Reviews & Standards
Enforcing strict code quality, security patterns, test coverage, and clear technical documentation.
MentorTeam Growth
Developer & Tester Mentoring
Guiding junior engineers, conducting technical onboarding, and assisting QA with automated testing strategies.
OperateProduction Engineering
Production Troubleshooting
Rapid incident response, live debugging, memory leak analysis, and high-availability operational support.
ImproveOptimization
Performance & Reliability
Optimizing service memory allocations, reducing CPU overhead, and building circuit-breaker POCs.
Case Studies
Selected Work
Engineering challenges, system architecture decisions, and real production outcomes.
Memory Profiling
1. Service Performance & Memory Optimization
Production Memory & Resource Profiling
Problem: A production backend service experienced excessive memory consumption and CPU contention under heavy traffic load.
Solution: Investigated inefficient execution paths, conducted heap allocation profiling, refactored problematic routines, and isolated memory leaks in shared libraries.
Result: Significantly reduced memory usage and CPU overhead, restoring service stability and lowering infrastructure load.
GoProfilingMemory OptimizationProduction Engineering
Fault-Tolerant Queue
2. Payment System Reliability
Fault-Tolerant Payment Architecture
Problem: Payment systems must handle unreliable third-party API dependencies, network drops, timeouts, and inconsistent downstream status responses.
Solution: Engineered resilient payment retry mechanisms, created proof-of-concept circuit breakers, and implemented async queue workers using RabbitMQ and AWS SQS.
Result: Prevented stranded transactions, ensured deterministic payment retries, and stabilized core transaction flows.
RabbitMQAWS SQSCircuit BreakersFintechPayment Flows
Core Domain Revamp
3. Partner & Transaction Platform
Revamping Core Production Subsystems
Problem: Existing partner module architecture lacked scalability for new digital product rollouts and deposit verification workflows.
Solution: Refactored and revamped the core partner management, product catalog management, deposit management, and transaction ledger domains.
Result: Streamlined partner onboarding, verified deposit workflows, and created clean domain boundaries across transaction modules.
GoPHP/LaravelPartner ManagementTransactionsPostgreSQL
Multi-Env Control Room
4. Payment Operations & Vendor Integration
Vendor API & Testing Infrastructure
Problem: Integrating multiple vendor APIs without standardized sandbox testing environments created integration bottlenecks across developer teams.
Solution: Built vendor API integrations, isolated testing/production environments, authored tester documentation, conducted code reviews, and proposed alternative technical solutions.
Result: Accelerated vendor testing velocity, eliminated environment crosstalk, and improved cross-functional feedback loops.
API GatewaysSystem DesignDocumentationTesting Envs
Bank UAT Passed
5. Financial Integrations & Bank UATs
Bank UATs & Microservice Design
Problem: Strict institutional compliance and technical standards required for integrating external banking APIs.
Solution: Led technical system design, executed bank UAT certifications, implemented circuit-breaker POCs, conducted code reviews, and coordinated product feedback.
Result: Successfully passed institutional bank UAT audits and delivered compliant production financial integration microservices.
Bank UATsCircuit BreakergRPCMicroservicesFintech
MVP Launch
6. From MVP to Production
MVP Execution & Technical Stability
Problem: Tight timelines for launching an educational fintech MVP while maintaining legacy application stability and meeting ISO certification requirements.
Solution: Executed task planning, built core MVP components, troubleshot production defects, and contributed to technical ISO 22001 certification compliance.
Result: On-time MVP launch, stabilized legacy application, and fulfilled technical ISO compliance guidelines.
MVP DevelopmentISO 22001PHP/LaravelAWS
Technical Capabilities
What I Work With
Battle-tested production technologies categorized by engineering purpose.
Backend
GolangPHPLaravelNode.jsSymfonyYii
Distributed Systems
RabbitMQSQSSNSgRPCMicroservices
Databases
MySQLPostgreSQLDynamoDB
Cloud & Infrastructure
AWS RDSS3EC2LambdaAPI Gateway
Frontend
ReactNext.js
Tools & Testing
GitGitLabSVNDockerPostmanRobot Framework
Systems & Architecture
Systems I Build & Engineering Approach
Conceptual system diagrams and core engineering principles for building reliable distributed software.
Payment Reliability Architecture
Fault TolerantClient Request→API Gateway
↓ (Async Dispatch)
Payment Queue (RabbitMQ / SQS)
↓ (Worker Processing)
Vendor API Integration
Circuit Breaker / Retry→Transaction Status Sync
Production Optimization Workflow
Memory ProfilingMemory Pressure→Profiling & Heaps
↓ (Root Cause Analysis)
Library Leak & Routine Refactor
↓ (Validation & Benchmarking)
Staging Load Verification
Production Deploy→Optimized Allocation & CPU
Core Engineering Philosophy
01
Measure Before Optimizing
Always rely on empirical production profile data and metrics to isolate genuine bottlenecks before altering code.
02
Reliability Matters First
Payment & transaction systems must gracefully handle third-party dependency outages, network drops, and timeouts.
03
Fix Root Causes, Not Symptoms
Production incidents are opportunities to implement systemic architectural fixes rather than swallowing exceptions.
04
Keep Architecture Practical
Introduce distributed complexity only when it solves a real problem; favor clean, maintainable microservice boundaries.
05
Share Technical Context
Thorough code reviews, clear documentation, and proactive mentoring elevate the entire team beyond individual contributions.
Technical Leadership
Beyond Writing Code
How I drive technical alignment, mentor engineering teams, and maintain production standards.
Architecture
Technical Design
System design, microservice boundary definition, and architectural planning for high-throughput backend services.
Quality Control
Code Reviews
Reviewing implementation quality, enforcing security & performance standards, and setting engineering guidelines.
Mentorship
Mentoring
Helping junior developers and QA testers understand complex system behavior and solve non-trivial bugs.
Operations
Troubleshooting
Hands-on production investigation, memory profiling, live incident response, and operational support.
Alignment
Cross-Team Coordination
Collaborating with product management, external bank integration teams, and vendors on technical decisions.
Execution
Technical Execution & Delivery
Guiding project task planning, establishing code quality standards, refactoring legacy platforms, and supporting technical compliance.
Insights
Engineering Knowledge
Thoughts on Go, PHP, architecture, and building software that lasts.
Get in Touch
Let's Discuss Engineering & Systems
Open to software consulting engagements, technical advisory, system architecture reviews, and high-impact distributed systems projects.