Arnold Ewin
Verified Expert in Engineering
Full-stack Developer
Tallinn, Estonia
Toptal member since January 27, 2021
Arnold is a full-stack developer with 5+ years of professional experience writing clean code to solve interesting problems using PHP, Go, and TypeScript. As an AWS Certified Solutions Architect, Arnold has hands-on experience designing, developing, and debugging distributed cloud-native systems that are highly scalable, secure, and reliable.
Portfolio
Experience
- JavaScript - 4 years
- Go - 3 years
- Vue - 3 years
- TypeScript - 3 years
- Vuex - 3 years
- API Architecture - 2 years
- Azure - 1 year
Availability
Preferred Environment
Cloud Native, Amazon Web Services (AWS), Jira, Linux, GoLand, Azure, GitLab, Bitbucket
The most amazing...
...thing I've developed is Nyanga Pay, a bill payment startup that allows Cameroonians to pay their bills instantly using their mobile phones.
Work Experience
Software Engineer
Microsoft
- Modernized components of an SMS service that delivers millions of SMS messages daily from .NET Framework to .NET Core and Kubernetes, resulting in the reduction of running costs by more than 30%.
- Coordinated with multiple teams to design and build a new multimedia messaging service.
- Added end-to-end tests to the deployment pipeline to ensure zero regressions during deployments.
Full-stack Developer
GeoPhy
- Worked on an event-sourced data management platform wired through Kafka that ingests around 10GB of real estate data daily to feed automated valuation models.
- Implemented GeoPhy's first design system using Storybook with components based on Vue.js.
- Built a smart text editor that reduced the time to complete a 60-page real estate valuation report from two weeks to around one day by automatically generating text from contextual property data.
Freelance Developer
Maatwebsite
- Designed and implemented a system for consuming the change feed of around two million companies and notifying loan officers to better analyze the risk exposure of loans to those companies.
- Coded an ownership graph for millions of companies to analyze their risk exposure to loans.
- Redesigned the authentication layer to resolve all the issues discovered during a security audit.
Experience
Nyanga Pay
https://nyangapay.comI built this project from scratch, using Vue and TypeScript for the front end and Go/MongoDB for the back end. The entire project is hosted on the Google Cloud Platform, and the number of transactions is growing by over 30% per month.
Cloud Accounting Software
https://api.alizep.com/index.htmlI developed this project from scratch using C# for the back end and React for the front end, which is a single-page application. I hosted the back end on the Google Cloud Platform, and the front end is hosted on Firebase.
Gist Cleaner
Education
Bachelor's Degree in Computer Engineering
University of Buea - Buea, Cameroon
Certifications
AWS Certified Solutions Architect
Amazon Web Services
Certified Laravel Developer
Laravel
Skills
Libraries/APIs
Vue, Vuex, jQuery, React, AMQP
Tools
GoLand, Jira, GitHub, GitLab, Bitbucket
Languages
Go, SQL, TypeScript, JavaScript, C#, PHP
Frameworks
Laravel, ASP.NET MVC, Laravel Mix, .NET Core, Symfony, Vuetify, Angular, Bootstrap, Swagger, Material UI
Paradigms
API Architecture, Agile, Event Sourcing
Platforms
Amazon Web Services (AWS), Docker, Windows, Linux, Cloud Native, Azure, Google Cloud Platform (GCP), Apache Kafka, Firebase
Industry Expertise
Marketing
Storage
Redis, MongoDB, NoSQL, Azure Cosmos DB, Azure Queue Storage, PostgreSQL, Databases
Other
Web Development, Software Engineering, APIs, Back-end, Storybook, PWA, Full-stack, OpenTelemetry, Progressive Web Applications (PWAs), Serverless, Leadership
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
Share your needs
Choose your talent
Start your risk-free talent trial
Top talent is in high demand.
Start hiring