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Ezechukwu Emmanuel

@ezechukwuemmanuel

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I build backend platforms, LLM/RAG pipelines, and integrations for enterprise and fintech products.

Nigeria

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What I'm looking for

I'm seeking immediate on-site or hybrid backend and integration work in Germany, with EU Blue Card sponsorship. I want to own services end to end, build scalable systems, and work directly with clients and cross-functional teams.

I've built enterprise e-invoicing and compliance systems at Heirs Technologies, integrating client ERPs with Nigeria's FIRS/NRS tax infrastructure. My platform onboarded 5+ enterprise clients and processed 500+ B2B invoices at 99.9% uptime.

I built a RAG-powered invoice transformation service that maps ERP invoices into government-compliant schemas, detects anomalies, and replaces manual reconciliation. I also designed event-driven microservices for authentication, validation, signing, reporting, and platform-wide RBAC.

At Cixtech, I'm building stablecoin custody-as-a-service infrastructure for cross-border payments, including structural invoice attribution, ledger invariants, on-chain reconciliation, and withdrawal safety controls. I also built a multi-LLM trading system at Africave Technologies that generated consensus signals and executed live trades on Binance and Bybit.

Across payment APIs, ERP systems, recruitment automation, and ed-tech products, I take services from requirements through cloud deployment and client delivery. I'm available immediately for on-site or hybrid backend and integration roles in Germany.

Experience

Work history, roles, and key accomplishments

Current

Founder / Solo Engineer

Current

Cixtech

Jul 2026 - Present (2 months)

Built a stablecoin custody-as-a-service engine for fintechs to accept cross-border stablecoin payments without becoming a regulated custodian. Solved crypto payment reconciliation with structural attribution and proved ledger invariants across reorgs and concurrent writes.

TypeScript Fastify PostgreSQL Kysely BullMQ Redis SeCp256k1 BIP 32 Shamir Secret Sharing

Current

Lead Backend Engineer / System Architect

Current

Heirs Technologies

Aug 2025 - Present (1 year 1 month)

Architected and built an enterprise e-invoicing compliance platform for Nigeria's NRS/FIRS mandate, onboarding 5+ enterprise clients and processing 500+ B2B invoices in 3 months at 99.9% uptime. Built a RAG-powered invoice transformation service and developed microservices integrating directly with FIRS/NRS endpoints.

Python fastAPI ASP.NET (C#)Next.js Kafka Redis LLM RAG PostgreSQL SQL Server Azure Microservices Event Driven Architecture RBAC

Current

Full-Stack Developer (Independent)

Current

AI-Powered Recruitment Automation System

Mar 2025 - Present (1 year 6 months)

Automated candidate sourcing, resume analysis, screening, and interview scheduling with GDPR-compliant data flow and Google Calendar integration.

AI Recruitment Automation GDPR Google Calendar API

Backend Engineer

Africave Technologies

Sep 2025 - Mar 2026 (6 months)

Designed a multi-LLM orchestration engine analyzing OHLCV market data to produce consensus-based trading signals. Built a real-time automated trading system executing live trades on Binance and Bybit from combined LLM/ML signals.

Python fastAPI LLM Binance REST API Bybit API Lang Chain Redis Docker PostgreSQL

Backend Developer

Devcenter Innovation

Jan 2023 - May 2025 (2 years 4 months)

Developed secure payment APIs and finance-gateway integrations with PCI-aligned security practices. Built an NLP resume-parsing and applicant-pipeline system using spaCy and PDFMiner, and developed booking, wallet, and room-management APIs with async notifications.

Python JWT SpaCy Pdfminer Celery Redis Payment Gateway Integration NLP

Full-Stack Developer

Klant Solutions

Jan 2025 - Apr 2025 (3 months)

Built ERP modules for inventory, customer measurements, and payments; implemented RBAC and background task processing.

ERP RBAC API Authentication Background Processing

ML Engineer

Pioneer AI

Jan 2025 - Mar 2025 (2 months)

Built clustering and fuzzy-matching pipelines for recurring-transaction detection, deployed as containerized services on AWS ECS (Fargate).

scikit learn Clustering Fuzzy Matching AWS ECS Fargate

Backend Lead

Nuel-Green ICT

Jan 2022 - Nov 2022 (10 months)

Led backend engineering for an ed-tech platform and managed a 7-person development team.

Backend Engineering Team Leadership Edtech

Full-Stack Developer

Pradech360

May 2021 - Jan 2022 (8 months)

Built a full-stack platform for an entertainment marketing company covering event listings, content management, and user-facing booking flows end to end. Used BullMQ for background job/notification processing and a combined MongoDB/PostgreSQL data layer.

NodeJS Next.js BullMQ MongoDB PostgreSQL