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MeetAhalpara/README.md

Meet Ahalpara

Software & AI Systems Engineer | High-Throughput APIs, Distributed Systems, Cloud Automation & Infrastructure Security

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About Me

I am a Software and AI Systems Engineer specializing in high-throughput backend runtimes, distributed transactional architectures, and deterministic AI retrieval pipelines. My engineering approach centers on systems-level resilience: eliminating latency bottlenecks, mitigating state-mutation race conditions, and enforcing strict data-layer invariants. From architecting hybrid lexical/vector search engines with zero hallucinations to engineering 3-tier enterprise data warehouses processing over 1.05M records, I build fault-tolerant backends engineered for deterministic execution under load.

My practical experience spans concurrent async API microservices, distributed enterprise applications, automated quality harnesses, and infrastructure defense. I design across the entire stack—orchestrating containerized AWS cloud workflows, implementing database-level Row-Level Security, managing zero-data-loss disaster recovery pipelines, and enforcing strict operational SLAs through automated load testing and continuous deployment.


Technical Core & Specializations

Domain Technologies, Runtimes & Frameworks
Languages & Runtimes Python 3.11–3.13, Java 21 / 8, TypeScript 5.x, JavaScript (ES6+), Kotlin 2.0, SQL, T-SQL, PL/pgSQL, GNU Bash
Backend & Distributed Systems FastAPI, Node.js, Express.js, Java 21 Jakarta EE (EJB, JPA, JAX-RS), Payara Server, Flask, Uvicorn, Asyncio, RESTful APIs
MLOps & Data Engineering MLflow 3.16.1, Kubeflow Pipelines (KFP v2), Evidently AI, Apache Spark (PySpark 3.5), Snowflake (Dynamic Tables & Tasks), Azure Data Factory (ADF v2), Terraform IaC
Databases & Vector Stores PostgreSQL, pgvector (HNSW Indexing), PostGIS, Microsoft SQL Server (SSMS, SSIS), MySQL, MongoDB (WiredTiger), SQLite, Redis
Cloud, DevOps & Infrastructure AWS (EC2, S3, IAM, EventBridge), Docker, Docker Compose, Linux (Ubuntu, Kali, Debian), Nginx, Ansible Core, Git, GitHub Actions, Jenkins
Testing, Security & Reliability Grafana k6, Pytest, Jest, Robot Framework, Selenium WebDriver, Postman / Newman CLI, JUnit 5, OWASP ZAP, Greenbone GVM, Metasploit, Restic

Featured Engineering Projects

Full-Scale Inventory & Operations Platform

A decoupled, multi-tenant inventory control and operational state management platform engineered for strict data isolation and high-concurrency mutation workloads.

  • Architecture & Storage: Engineered an Express.js and Node.js REST API with Mongoose ODM, utilizing compound B-tree indexes ({ ownerUserId: 1, purchased: 1 }) and resilient multi-stage database bootstrapping with automatic failover from persistent WiredTiger disk storage to in-memory instances under lock contention.
  • Ownership Enforcement: Implemented stateless JWT Bearer token authentication with multi-tenant object-level access verification, eliminating unauthorized cross-tenant mutations.
  • Performance & Verification: Validated under concurrent stress using Grafana k6 pipelines to guarantee SLAs ($p(95) < 200\text{ms}$, failure rate $< 1%$ across 100 concurrent VUs) alongside Newman/Postman automated collection regression suites.
  • Tech Stack: Node.js | Express.js | MongoDB (WiredTiger) | Jest | Grafana k6 | Postman / Newman
  • Source: [Institutional Repository — Access Available by Request]

NityaGeeta — High-Throughput Grounded Scriptural RAG Platform

An asynchronous scriptural intelligence engine combining a Next.js 15 App Router frontend with a high-throughput FastAPI backend running a hybrid lexical/semantic retrieval pipeline across 5,034 canonical commentary pages.

  • Hybrid Retrieval Pipeline: Architected an in-memory lexical BM25Okapi search engine (Robertson-Spärck Jones IDF with document-length normalization) coupled with Reciprocal Rank Fusion (k=60) across 5 weighted datasets (W=3.0 down to W=1.0) indexing 649 unique shlokas and 13,226 vocabulary tokens.
  • Multi-Model LLM Ensemble & Arbitration: Asynchronous parallel fan-out across multiple LLM providers (Groq, OpenRouter) arbitrated by an LLM judge model with post-generation ground-truth citation verification.
  • Resilience & Fault Tolerance: Implemented an asynchronous 3-state circuit breaker (CLOSED, OPEN, HALF-OPEN) with a 5-failure threshold and 30s cooldown to isolate upstream rate limits, serving responses via chunked Server-Sent Events (SSE) with buffer suppression (X-Accel-Buffering: no).
  • Container Security & Persistence: Multi-stage Docker deployment running under a dedicated non-root execution user (appuser, UID 10001) backed by PostgreSQL session storage with 18-day TTL tokens.
  • Verification & CI/CD: Hardened with strict Pydantic v2 input boundary validation, an automated 39-test Pytest verification suite covering citation scrubbers and wire protocols (100% pass rate), and an automated GitHub Actions CI/CD pipeline.
  • Tech Stack: FastAPI | Python 3.12 | Next.js 15 | React 19 | PostgreSQL | Redis | Docker | Pytest | Groq API
  • Source: Repository

AI & MLOps Engineering Suite (Audio Sentiment DJ Bot & SkillChain)

An applied machine learning operations (MLOps) and intelligence portfolio featuring automated model lifecycle management, statistical data drift monitoring, and deep learning pipelines.

  • Continuous Audio MLOps Pipeline: Trained and benchmarked acoustic classification models (Logistic Regression, Decision Trees, K-Nearest Neighbors) across 232,725 historical Spotify tracks with automated 80/20 train/test splitting and StandardScaler serialization parity.
  • MLflow Tracking & Model Registry: Integrated automated MLflow experiment tracking logging hyperparameters, confusion matrices, and model accuracy, with an automated Model Registry gateway registering winning candidate models to production stages.
  • Statistical Data Drift Monitoring: Engineered continuous covariate shift detection with Evidently AI and SciPy, executing Two-Sample Kolmogorov-Smirnov (KS-test) and Wasserstein distance calculations to export automated HTML and JSON drift diagnostic reports.
  • Kubeflow Pipelines (KFP v2) DAG: Compiled a declarative 5-stage Kubeflow Pipeline DAG (audio_pipeline_dag.yaml) orchestrating data validation, model retraining, MLflow serialization, and automated drift alerting.
  • Cryptographic Verification Ledger: Developed SkillChainLedger, an append-only SHA-256 cryptographic blockchain ledger in Python, coupled with a reactive Streamlit analytics dashboard and deep learning classification modules (IMDB NLP & MNIST neural networks).
  • Tech Stack: Python 3.13 | MLflow | Kubeflow Pipelines (KFP v2) | Evidently AI | Scikit-Learn | TensorFlow / Keras | Streamlit | SciPy | Pandas | Pytest
  • Source: Repository

Cybersecurity Engineering & Infrastructure Defense Portfolio

A production-grade cybersecurity engineering suite modeling real-world attack surfaces, executing penetration tests, automating disaster recovery, and enforcing host-hardening baselines across segmented subnets.

  • Offensive & Defensive Security Operations: Executed automated DAST fuzzing on Docker microservices via OWASP ZAP reverse-proxies, mapped attack surfaces with Greenbone GVM across full IANA ranges, and executed black-box Metasploit penetration runs against vulnerable Linux daemons.
  • Continuous Disaster Recovery: Architected an automated zero-data-loss PostgreSQL backup pipeline streaming pg_dump directly into an encrypted, content-addressable Restic repository via non-interactive nightly Cron jobs (AES-256 at rest, SHA-256 deduplication).
  • Host Hardening & Auditing: Automated declarative host hardening using Ansible Core to enforce default-deny UFW perimeters (ports 22/8080), auto-generate X.509 TLS PKI certificates, and establish AIDE SHA-256 tripwires across critical paths (/etc/passwd, /etc/shadow, /etc/ssh/sshd_config).
  • Threat Modeling & Governance: Authored enterprise STRIDE threat models for autonomous transport architectures (mTLS, HSM, CAN Bus isolation) and drafted PHIPA-compliant healthcare IAM/MDM governance frameworks.
  • Tech Stack: Kali Linux | Ubuntu Server | Ansible Core | PostgreSQL | Restic | OWASP ZAP | OpenVAS / GVM | Metasploit | Docker
  • Source: Repository

ConsultHub — Mobile Application & Geospatial Matching Engine

A cross-platform professional consulting marketplace featuring vector-based semantic matchmaking, spatial distance filtering, and atomic contract lifecycle workflows.

  • Mobile Architecture & Rendering: Solely architected the cross-platform client using React Native (Expo SDK 54) and TypeScript, integrating TanStack Query for cache invalidation and NativeWind UI to eradicate layout shifts.
  • Semantic & Spatial Discovery: Integrated client discovery with Supabase PostgreSQL RPCs, combining 384-dimensional pgvector embeddings via HNSW cosine indexing (vector_cosine_ops) with PostGIS GiST spatial queries (ST_DWithin) and composite scoring algorithms.
  • Real-Time Communications & Security: Built a duplex messaging layer backed by Supabase WebSockets, PL/pgSQL database triggers, and database-level idempotent event keys under 100% Row-Level Security (RLS) via isolated SECURITY DEFINER procedures.
  • Tech Stack: React Native (Expo SDK 54) | TypeScript | Supabase | PostgreSQL | pgvector | PostGIS | TanStack Query
  • Source: [Proprietary Architecture — Source Protected under Signed NDA]

Distributed Enterprise Systems (REST-ACMEMedical & PTFMS)

A suite of high-availability enterprise applications engineered with strict design patterns and distributed transaction processing capabilities.

  • Jakarta EE Enterprise Platform (ACMEMedical): Architected a multi-tier clinical management platform on Java 21 and Payara Server using JAX-RS, stateless EJBs, and JPA/Hibernate with optimistic locking (@Version), RFC 7617 HTTP Basic authentication, and Soteria PBKDF2 credential hashing (2048 iterations).
  • Transit Fleet Operations (PTFMS): Built an enterprise transit coordination platform using Java 8 / Servlets, JDBC PreparedStatement pools, and GoF patterns (Strategy for polymorphic propulsion fuel tracking, Adapter for external GPS feeds, and Observer for maintenance dispatching).
  • Enterprise Persistence: Engineered normalized schemas across MySQL instances with connection pooling, declarative role-based access control, and JUnit 5 / Jersey Client integration suites.
  • Tech Stack: Java 21 / 8 | Jakarta EE | EJB | JPA / Hibernate | Payara | Servlets | JDBC | MySQL
  • Source: Repository

Banking Analytics Data Warehouse & Risk Default Engine

A decision-support banking data warehouse modeled on a 3-tier Kimball analytical pattern to ingest, model, and analyze transactional ledgers and forecast credit risk.

  • High-Volume ETL Architecture: Engineered SSIS memory-buffered pipelines with upstream physical sort contracts and cascading merge joins to extract, cleanse, and transform $1.05\text{M}+$ financial records and regional socio-economic indicators.
  • Predictive Risk Analytics: Authored multi-level Transact-SQL CTEs, rolling aggregations, and window functions to compute liquidity depletion velocity flags ($>5$ withdrawals $> $500$), forecasting loan defaults 2–3 months prior to delinquency.
  • Dimensional Modeling: Designed star/snowflake schemas in SQL Server with clustered indexing, categorical domain mapping, and interactive Power BI analytical dashboards.
  • Tech Stack: Microsoft SQL Server | T-SQL | SSIS | SSMS | Power BI
  • Source: Repository

SauceDemo Quality Engineering & CI/CD Test Harness

An enterprise-grade test automation and regression framework designed to evaluate single-page web applications against complex shopping and checkout flows.

  • DOM Synchronization Engine: Engineered a Page Object Model (POM) test architecture in Python and Selenium WebDriver, injecting custom JavaScript into React’s internal _valueTracker to dispatch synthetic bubbling input and change events and eliminate headless synchronization race conditions.
  • Dual Automation Engine: Implemented 22 parameterized Pytest scenarios and 14 keyword-driven Robot Framework specifications with zero implicit waits and explicit condition polling.
  • Continuous Integration Pipelines: Configured dual execution pipelines across Jenkins (declarative Jenkinsfile archiving JUnit XML trends) and GitHub Actions with automated failure screenshot capture and interactive HTML test reporting.
  • Tech Stack: Python | Selenium WebDriver | Robot Framework | Pytest | Jenkins | GitHub Actions
  • Source: Repository

Education & Credentials

Academic Foundations

  • Algonquin College (Ottawa, ON)
    • Advanced Diploma in Computer Programming and Analysis (AAL 01–06)
    • Cumulative GPA: 3.52 / 4.00 | Multi-Term Dean's Honours List
  • Sir Bhavsinhji Polytechnic Institute (Gujarat, India)
    • Diploma in Information Technology
    • Cumulative GPA: 7.91 / 10.0 CGPA (First Class with Distinction)

Professional Certifications

  • AWS Certified Cloud Practitioner (CLF-C02) — In Progress
  • AWS Educate – Introduction to Cloud 101
  • Microsoft – Describe Cloud Computing Principles
  • LinkedIn Learning – Software Architecture Patterns

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