COMPREHENSIVE COMPETENCY MATRIX
Skills & Engineering Toolchain
Detailed breakdown of my core technical competencies—combining smart contract development, auditor-level security analysis, high-concurrency backend services, and multi-chain financial rails.
Backend Engineering & API Architecture
3+ years of production experience designing high-concurrency RESTful APIs, WebSocket protocols, and resilient microservices.
Node.js & TypeScript Ecosystem
AdvancedExpress.js, strict TypeScript 5, Zod schema contracts, event emitters, WebSocket protocol integration, Knex.js, and modular domain architectures.
Python (FastAPI & Django REST Framework)
ProficientFastAPI asynchronous microservices, Django REST Framework, Celery task scheduling, Pydantic validation, and ORM query optimization.
RESTful API Design & Clean Architecture
AdvancedMulti-tiered domain services, input sanitization, centralized error handling middleware, rate limiting, and OpenAPI/Swagger contract generation.
Authentication & Access Control (JWT/RBAC)
AdvancedDual-token JWT family rotation (short-lived access + sliding refresh), token blacklisting in Redis, and granular Role-Based Access Control.
PHP & Enterprise CRM Gateways
ProficientPHP 8+ OOP, PSR-4, PDO prepared statements, OWASP security baseline enforcement, and Excel processing.
Databases, Caching & Financial Ledgers
Designing normalized schemas, relational integrity constraints, and sub-millisecond caching layers.
PostgreSQL & Supabase
AdvancedComplex joins, indexing strategies, Row-Level Security (RLS) policies, JSONB querying, database triggers, and transaction poolers.
Redis 7 In-Memory Caching
AdvancedSub-millisecond query caching, sliding token revocation lists, distributed locks, and pub/sub message brokering.
Append-Only Double-Entry Ledgers
AdvancedDesigning auditable, sub-millisecond ledger tables that mirror accounting debits and credits with row-level locks (SELECT ... FOR UPDATE).
MongoDB Atlas & NoSQL
ProficientDocument modeling, Mongoose aggregation pipelines, geospatial indexing, and real-time change streams for chat apps.
MySQL & Relational Design
ProficientACID transactional schemas, foreign-key cascade controls, and high-concurrency referral hierarchy trees.
Smart Contracts & Web3 Integration
Solid working understanding of EVM state machines and Solidity smart contracts, enabling seamless backend-to-blockchain bridges, RPC listening, and multi-chain settlement.
Solidity & Smart Contract Mechanics
ProficientWorking knowledge of Solidity syntax, state variables, function modifiers, storage layout packing, custom errors, and escrow logic.
Multi-Chain Stablecoin Settlement
ProficientArchitecting USDC deposit, escrow, and payout flows across Stellar (trustlines) and Base L2, integrated with Blink Merchant Gateway.
RPC Node & On-Chain Verification
ProficientDirect zero-gas JSON-RPC verification of transaction receipts, event logs, and block confirmation depths before balance commitment.
Hardhat & Foundry Testing
WorkingTesting Solidity contracts against local simulated testnets, executing fork tests against live networks, and validating basic invariants.
Security, Invariants & Systems Thinking
Rooted in a B.Sc. in Accounting, analyzing backend systems through adversarial lenses, formal financial invariants, and separation of duties.
Invariant Identification & Business Rules
AdvancedDeriving fundamental state truths (non-negative balances, value conservation, immutable event logs) through Socratic threat analysis.
Idempotency & Double-Spend Defense
AdvancedEnforcing strict idempotency keys across deposit webhooks and utilizing database row-level locking (SELECT ... FOR UPDATE).
Threat Modeling & Role Analysis
ProficientProfiling attacker classes (unauthorized outsiders, compromised admins, race conditions) to pressure-test API endpoints and access controls.
Separation of Duties & Multi-Sig Controls
ProficientArchitecting two-phase approvals, timelocks, and multi-signature checkpoints for high-risk financial and administrative actions.
Cloud DevOps, Tooling & Workflows
Ensuring continuous delivery, zero-downtime deployments, containerization, and monitoring.
Cloud Hosting & Orchestration
AdvancedRender, Railway, Vercel, Docker containerization, environment variable secret management, and webhook ingress configurations.
API Contracts & Documentation
AdvancedSwagger UI, OpenAPI 3.0 specification generation, Postman automated test suites, and strict Zod contract boundaries.
Git Version Control & CI/CD
AdvancedTrunk-based development, branch protection rules, semantic release tagging, GitHub Actions automation, and code reviews.
AI & Speech API Integration
ProficientAssemblyAI streaming transcription, Groq Llama 3.3 / Claude 3.5 structured inference, and WhatsApp Cloud API / Kapso webhooks.
Looking for a Developer Who Tests Invariants, Not Just Syntax?
Every system I build incorporates strict boundary checks, role authorization guards, and idempotent execution rails. Let’s talk about your smart contracts or backend systems.