Senior Backend Engineer | Node.js | AWS | Distributed Systems

Senior Backend Engineer with 8+ years of experience designing, building, and deploying scalable, production-grade systems across SaaS, government, financial, and regulatory environments.

View My Work Let's Connect
8+ Years Experience
25+ Business Clients
97% Performance Improvement

About

Senior Backend Engineer with 8+ years of experience designing, building, and deploying scalable, production-grade systems across SaaS, government, financial, and regulatory environments.

Professional Summary

Senior Backend Engineer (Node.js / AWS)

Strong expertise in Node.js backend architecture, relational database design (PostgreSQL/MySQL), RESTful APIs, workflow engines, and AWS cloud infrastructure (EC2, RDS, S3).

Proven experience leading backend architecture for EU-funded and nationally sponsored platforms requiring auditability, role-based access control (RBAC), compliance-driven data modeling, and structured enforcement logic.

Name Alexander Osei Gyapong
Phone +233 24 385 5776
Email myself@oseigyapong.org
Alt Email billzalexander@gmail.com
LinkedIn www.linkedin.com/in/oseigyapong
GitHub www.github.com/billzberry
Location Ghana
Alexander Osei Gyapong

Senior Backend Engineer

Node.js • AWS • Distributed Systems

Backend Engineering

Node.js, TypeScript, JavaScript (ES6+), Python, RESTful API Design, Microservice-Oriented Architecture, Event-Driven Systems, RBAC, Secure Authentication & Authorisation, Workflow Engine Design, Audit Logging Systems, Validation & Domain Modeling.

Node.js REST APIs RBAC Workflow Engines

Databases

PostgreSQL, MySQL, Relational Schema Design, Query Optimisation, Indexing, Transaction Management, Data Integrity Enforcement.

PostgreSQL MySQL Query Optimisation Data Integrity

Cloud & Infrastructure

AWS EC2, AWS RDS, AWS S3, Production Deployment Architecture, Environment Configuration, Server Provisioning & Hardening.

AWS EC2 AWS RDS AWS S3 Production Deployments

DevOps & Delivery

Git, CI/CD Pipelines, Staging & Production Environment Management, Code Reviews, Agile/Sprint-Based Delivery.

CI/CD Staging/Prod Code Reviews Agile Delivery

Resume

Experience designing reliable, secure, and maintainable backend systems that translate complex business rules into enforceable technical architecture.

Work Experience

Selected roles covering scalable RESTful APIs, workflow-driven systems, audit logging, and production AWS environments.

Carra (Fully Remote)

April 2022 – November 2025

Senior Full-Stack Engineer

Led design and evolution of scalable backend systems using Node.js and TypeScript, with traceable audit logging across workflows.

  • Led design and evolution of scalable RESTful APIs using Node.js and TypeScript
  • Architected backend data aggregation pipelines (Python/JavaScript) supporting ML-driven product features
  • Designed and optimised relational database schemas (PostgreSQL/MySQL)
  • Automated CI/CD pipelines and deployment workflows
  • Drove codebase maintainability and reduced technical debt
  • Delivered high-availability production services within a fully remote Agile environment
  • Designed scalable backend systems handling concurrent multi-role access
  • Implemented structured audit logging ensuring traceability across workflows
  • Owned production AWS environments end-to-end

LoGig Ltd

2017 – 2025

Senior Full-Stack Engineer / Technical Lead

Architected backend systems across ERP, transparency initiatives, e-governance platforms, and cloud-hosted production environments.

  • Enterprise Resource Planning (ERP) – Ovasyte Enterprise Suite: Architected backend systems for ERP platform serving 25+ business clients; implemented HR, payroll, procurement, clinic management, finance and operations modules; improved system performance by 97% through backend and database optimisation; strengthened database security and schema integrity.
  • CoST Infrastructure Disclosure Portal & Dashboard (Transparency Initiative): Designed backend aligned with structured Infrastructure Data Standards (40+ lifecycle data points); built compliance validation engine for structured data submission; implemented audit trail logging for multi-stakeholder oversight; deployed and maintained AWS production environment; enabled structured public disclosure of infrastructure projects; supported accountability and assurance processes.
  • EU-Funded Twin City Connect – STMA E-Governance Platform: Architected full digital governance platform automating municipal services; built RESTful APIs supporting web, desktop and mobile clients; designed workflow-driven service request system; implemented secure authentication and role-based governance access; supported revenue collection and operational reporting modules; digitised municipal services end-to-end; reduced manual processing through workflow automation.
  • Forestry Commission Provident Fund Management System: Designed backend for contribution tracking and financial record management; integrated USSD gateway for low-connectivity environments; designed transaction-safe contribution and reporting modules; improved transparency and employee access to financial data; reduced reconciliation errors through structured backend validation.
  • MiDA Sustainable Energy Service Center Platforms (3 Universities): Designed multi-tenant backend architecture; implemented structured certification and course management workflows; deployed cloud-hosted production infrastructure; supported institutional certification and regulatory capacity building.

My Education

Business information technology and computer systems & networking certification.

NCC Education (UK)

2017

Diploma in Business Information Technology

IPMC – Ghana

—

Computer Systems & Networking Certificate

Portfolio

Selected platforms and backend systems from your CV experience.

  • All Work
  • Platforms
  • Data & Compliance
  • E-Governance
  • Production AWS
ERP & Enterprise Systems

Ovasyte Enterprise Suite (ERP)

Architected backend systems for an ERP platform serving 25+ business clients; implemented HR, payroll, procurement, clinic management, finance and operations modules; improved system performance by 97%; strengthened database security and schema integrity.

Transparency & Data Standards

CoST Infrastructure Disclosure Portal & Dashboard

Designed backend aligned with structured Infrastructure Data Standards (40+ lifecycle data points); built a compliance validation engine for structured data submission; implemented audit trail logging for multi-stakeholder oversight; enabled structured public disclosure of infrastructure projects; supported accountability and assurance processes.

E-Governance

EU-Funded Twin City Connect – STMA E-Governance Platform

Architected full digital governance platform automating municipal services; built RESTful APIs supporting web, desktop and mobile clients; designed workflow-driven service request system; implemented secure authentication and role-based governance access; supported revenue collection and operational reporting modules; digitised municipal services end-to-end; reduced manual processing through workflow automation.

Financial Systems

Forestry Commission Provident Fund Management System

Designed backend for contribution tracking and financial record management; integrated USSD gateway for low-connectivity environments; designed transaction-safe contribution and reporting modules; improved transparency and employee access to financial data; reduced reconciliation errors through structured backend validation.

Multi-tenant Platforms

MiDA Sustainable Energy Service Center Platforms (3 Universities)

Designed multi-tenant backend architecture; implemented structured certification and course management workflows; deployed cloud-hosted production infrastructure; supported institutional certification and regulatory capacity building.

APIs & Audit Logging

Carra (Fully Remote) — RESTful APIs & Audit Logging

Led scalable RESTful API design and evolution using Node.js and TypeScript; implemented structured audit logging ensuring traceability across workflows; automated CI/CD pipelines and deployment workflows; owned production AWS environments end-to-end.

Highlights

Evidence from your CV: secure backend architecture, compliance-driven data modeling, and production ownership.

Auditability & RBAC

Proven experience leading backend architecture for EU-funded and nationally sponsored platforms requiring auditability, role-based access control (RBAC), compliance-driven data modeling, and structured enforcement logic.

Implemented structured audit logging ensuring traceability across workflows and multi-role access patterns.

Compliance-Driven Architecture

RBAC • Audit Logging

Production AWS Ownership

Owned production AWS environments end-to-end and built production deployment architecture across EC2, RDS, and S3.

Automated CI/CD pipelines and deployment workflows for high-availability services within fully remote Agile delivery.

AWS Deployment

EC2 • RDS • S3

Scalable REST APIs & DB Optimization

Designed and optimised relational database schemas (PostgreSQL/MySQL) and built scalable backend systems handling concurrent multi-role access.

Improved system performance by 97% through backend and database optimisation and delivered high-availability production services.

Performance & Scalability

PostgreSQL • MySQL

Workflow-Driven Systems

Built compliance validation and workflow-driven service request systems and implemented structured audit trail logging for multi-stakeholder oversight.

Designed workflow engine design, validation & domain modeling, and secure authentication & role-based governance access.

Workflow & Governance

Audit trails • RBAC

Services

Backend services aligned with your CV: secure APIs, data integrity enforcement, workflow engines, and AWS production deployments.

What I Deliver

Reliable, secure, and maintainable backend systems that enforce complex business rules.

See experience

RESTful API Design & Backend Architecture

Node.js backend architecture, microservice-oriented patterns, and secure authentication & authorisation.

Databases & Data Integrity Enforcement

Relational schema design, query optimisation, indexing, transaction management, and data integrity enforcement.

RBAC, Audit Logging & Compliance

Role-based access control (RBAC), audit logging systems, compliance-driven data modeling, and structured enforcement logic.

AWS Production Deployment

AWS EC2, AWS RDS, AWS S3, production deployment architecture, environment configuration, and server provisioning & hardening.

Frequently Asked Questions

Answers based on my CV experience (technologies, security, workflow systems, databases, AWS, and availability).

Which backend technologies do you specialize in?

Node.js, TypeScript, JavaScript (ES6+), Python, RESTful API Design, Microservice-Oriented Architecture, and Event-Driven Systems.

How do you design secure and compliant systems?

RBAC, Secure Authentication & Authorisation, Audit Logging Systems, compliance-driven data modeling, and structured enforcement logic.

Do you build workflow-driven solutions?

Yes—Workflow Engine Design and workflow-driven service request systems.

Which databases have you worked with?

PostgreSQL and MySQL with relational schema design, query optimisation, indexing, transaction management, and data integrity enforcement.

Do you deploy on AWS?

AWS EC2, AWS RDS, AWS S3, production deployment architecture, environment configuration, and server provisioning & hardening.

Are you open to remote work?

Ghana | Open to Remote & International Opportunities.

Contact

Contact

Open to Remote & International Opportunities. Reach out via email or profiles.

myself@oseigyapong.org
billzalexander@gmail.com
+233 24 385 5776
Ghana
www.linkedin.com/in/oseigyapong
www.github.com/billzberry

Quick Links

Email Alexander LinkedIn Profile GitHub Profile

Ghana | Open to Remote & International Opportunities