Charles Rethman

Background

About Charles Rethman

Proactive, target-driven software engineering professional with end-to-end development, code writing and project management skills for private and public sector clients worldwide. Takes the initiative with analysing requirements, assessing risks, designing, implementing and completing projects. Deploys, configures and maintains technology in challenging environments.Suited to a Senior Developer or Solutions Architect position, that may stretch beyond product technical build to project leadership, including strategic planning and business analysis to align software products with longer-term business objectives and expansion.KEY COMPETENCIES:• Postgres, including SQL procedural language (PL/pgSQL) and PostGIS (2- and 3-dimensional, geometry and geography data types);• NoSQL databases: MongoDB systems admin, schema design, queries and indexing. Familiar with the ELK Stack (Elasticsearch, Logstash and Kibana) and have used RabbitMQ and its libraries.• Worked on Docker and Kubernetes for cloud services development, on AWS and Google Cloud Platform with containerised micro-service based architectures;• YAML, JSON, GeoJSON and BSON data specifications;• Languages: mainly Javascript and Typescript/NodeJS, Angular and HTML/CSS.• Good familiarity with Linux and Darwin Zsh or Bash command lines and scripting;• REST APIs for web and mobile applications (HTTP/S), API design (Swagger), user authentication/authorisation (OAuth) and security.• Mapping, cartography, spatial analysis and data management. Emphasis on vector analysis, large datasets at small-scale (provincial- or national-levels);• Open source GIS stack with GeoServer, OpenLayers, QGIS and PostGIS (also ESRI’s ArcGIS suite);• Analytics and data-munging, measuring complex human sciences data, especially on economics and livelihoods. • Field surveys (semi-structured focus groups, RRA tools, questionnaires), strong training and presentation skills (e.g. designed and developed modules for Beginners’ QGIS);• Effective report writing and communication skills, experience managing large-scale projects.