Walter Marvey-John
Walter Marvey-John

Walter Marvey-John

Backend • Management: 3-5 years (6-15 people) • 38 years • Freetown, Sierra Leone • UTC+00:00 • Fully remote • Relocation • Work permits: Sierra Leone • Citizenship: Sierra Leone • Available in 4 weeks • from $120k per year
Software Developer
11+ years exp
Management: 3-5 years (6-15 people)
5+ projects
Java
Python
C#
PHP
Active 7 hours ago
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Overview
Technical skills
Timeline
Roles

Overview

Software engineer with about 12 years of experience building and maintaining web and Android mobile applications and supporting IT and data management needs. Has professional experience with Java, C#, ASP.NET, Python, and PHP, and supported data operations using Microsoft Excel in a medical supply chain environment.
Phone

Technical skills

Java
Python
C#
PHP
Databases
MySQL
Apache Kafka
Trino
RabbitMQ
Frontend
Angular
Next.js
GraphQL
Babel
DevOps
Rest API
gRPC
Apache HTTP Server
AIOps
Analytics
AWS Glue
Microsoft Excel

Timeline

Software Developer • Middle
Knowledge Network Solutions • Full-Time
Jan 2016 to Jan 2020 4 Years Freetown In office
Built and maintained web and mobile software solutions aligned with business requirements, with focus on development standards and system integrity. Developed and supported web applications using ASP.NET, C#, Python, and PHP to address performance issues and user needs. Implemented Android mobile functionality in Java and ensured ongoing application maintenance.
ASP.NET Core
C#
Python
PHP
Java
IT Data Management Officer • Middle
UNICEF • Contractor
Jan 2014 to Jan 2015 1 Year Freetown In office

Managed data structures and supported critical IT infrastructure in a medical supply chain environment. Led database operations and optimized information storage and retrieval using mSupply and Microsoft Excel. Performed system maintenance and resolved technical issues to keep operations continuously available.

Microsoft Excel
Auxiliary IT Administrator • Middle
Pharmacy Board of Sierra Leone • Full-Time
Feb 2012 to Jan 2014 1 Year 11 Months Freetown In office
Provided technical support and maintained physical IT infrastructure to support administrative operations. Administered internal systems and network infrastructure to enable reliable day-to-day usage. Troubleshot PC hardware and network connectivity issues to restore functionality.
IT Administrator • Middle
Nile Construction Company Ltd • Full-Time
Jan 2010 to Feb 2012 2 Years 1 Month Freetown In office
Handled local area network administration to minimize downtime for internal systems. Supervised hardware maintenance and coordinated device configuration schedules. Supported day-to-day network operations and ensured stable connectivity across the company.