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Achievement: Arctic Code Vault Contributor

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git-me/README.md

Hi, I'm Manoj 👋

Principal Backend Engineer (Individual Contributor)

Distributed Systems · Platform Architecture · Building AI Observability Capability

🧭 About Me

  • 10+ years as a backend engineer and platform architect (IC) across fintech, e-commerce, and investment banking
  • Delivered EUR 2M+ incremental revenue and processed EUR 300M+ in transactions at 99.97% success at Adidas
  • Reduced production incidents by 35% · Built systems sustaining 250K+ concurrent users at 98.5% uptime
  • Cut fraud by 2.3%, saving EUR 150K+ annually via real-time detection pipeline at Gojoko
  • Built an org-wide telemetry framework cutting logging overhead 40% across 15+ microservices
  • Currently extending platform-engineering and telemetry expertise into AI observability — Spring AI, LangChain, RAG, OpenTelemetry (self-study)

🛠️ Tech Stack
Languages Java Golang
Frameworks Spring Boot Spring Cloud Spring Security Spring WebFlux Spring Batch
Messaging Kafka Kafka Streams RabbitMQ
Cloud (AWS) Lambda ECS/EKS S3 SQS EventBridge CloudWatch X--Ray
Cloud (Azure) Azure Databricks Delta Lake Cosmos DB
Data PostgreSQL MySQL MongoDB Redis DynamoDB Elasticsearch
DevOps & CI/CD Docker Kubernetes Jenkins GitHub Actions GitLab CI Terraform
Observability Prometheus Grafana Jaeger ELK Stack
Security & Quality OAuth2 Keycloak SonarQube JUnit 5 Testcontainers
AI/GenAI (building capability) Spring AI LangChain OpenAI API Cursor GitHub Copilot Hugging Face

🏆 Career Highlights
🥇 Promoted to Principal Engineer at Gojoko Technologies Recognized for technical leadership as IC
🏅 Highest Impact Contributor — Adidas (2023) PSP modernization saving 15–20% on payment fees
⚡ EUR 2M+ incremental loan volume in 6 months Counteroffer dynamic pricing engine
💳 EUR 300M+ transactions at 99.97% success Adidas payments platform
🛡️ 2.3% fraud reduction · EUR 150K+ saved/yr developed fraud detection services at Gojoko
📉 35% production incident reduction Quality gates + RCA practices at Adidas
🔭 40% telemetry overhead reduction Org-wide S3 logging framework — 15+ services

🚀 Notable Projects

  • Real-Time Fraud & Anomaly Detection Pipeline — Experian + CrossCore API integration; behavioral signal instrumentation; 2.3% fraud reduction; EUR 150K+ saved annually
  • KYC Service (OCR + Facial Recognition) — Event-driven identity verification; explainability and audit logging; 98% accuracy
  • S3 Logging & Telemetry Utility Framework — Production-grade async library adopted org-wide; 40% overhead reduction across 15+ microservices
  • Webhook Orchestration Service — Async event delivery with retry, DLQ, and transformation pipelines; 20+ integrations (PagerDuty, Slack, Analytics)
  • Universal PSP Adapter — Plug-and-play switching across Adyen, ACI, PayU, Klarna; 15–20% rate savings on EUR 300M+ transactions

🌱 Currently Building

  • OpenTelemetry instrumentation for LLM/agent pipelines (semantic conventions, span design)
  • RAG pipelines with Spring AI & LangChain — vector embeddings, prompt engineering, OpenAI API
  • Responsible AI concepts — fairness, bias detection, explainability (self-study)

📂 What You'll Find Here

Repo What it covers
Microservices & DDD patterns Spring Boot, Kafka, event-driven design
Fraud & anomaly detection Behavioral signal instrumentation, ML-ready pipelines
AI / GenAI experiments Spring AI, LangChain, RAG pipeline prototypes
System design notes Architecture patterns, case studies, scalability designs
Dev snippets Java, Spring, cloud-native utilities

B.Tech CSE · GGSIPU Delhi (2015)  |Fintech & Payment Engineer|  AWS Solutions Architect Associate (In Progress)

Pinned Loading

  1. WebcrawlerApi WebcrawlerApi Public

    This is an Api used for webrawling using spring boot

    Java

  2. OCP using Strategy Design Pattern OCP using Strategy Design Pattern
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    <?xml version="1.0" encoding="UTF-8"?>
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    <project version="4">
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      <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="11" project-jdk-type="JavaSDK">
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        <output url="file://$PROJECT_DIR$/out" />
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      </component>
  3. PracticeCodes-1 PracticeCodes-1 Public

    This repo includes recent practice codes like DS,hackerank,ocjp etc...

    Java

  4. SOLID SOLID Public

    Forked from mikeknep/SOLID

    Demonstrating the SOLID design principles in Java

    Java

  5. TemplateDesign pattern in multithrea... TemplateDesign pattern in multithreaded env
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    import TemplateDesignpattern.process.GeneralmanufacturingProcess;
    
              
    
              
    
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    import TemplateDesignpattern.process.SmartPhoneManufacturing;
    
              
    
              
    
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    import TemplateDesignpattern.process.StorageDeviceMannufacturing;
    
              
    
          
    
    
    
  
    

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          practice-code  practice-code          Public
        
    
      
    


      
    
        codes in java for Design Patterns, and from various competitive platforms
      
    

      
    
          
  
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