santosleijon.dev

Hello, I'm Santos!

I am a seasoned software developer with a passion for building maintainable and scalable enterprise software.

Since 2017 I have worked on a variety of projects, from maintaining old legacy systems to developing brand new web applications using the latest tech stacks.

Feel free to contact me: linkedin.com/in/santos-leijon

Professional experience

2021-03 -

Software Developer, Fortnox AB

Developed Fortnox Business Mailbox, a new product aimed at small businesses used to receive goverment mail, supplier invoices and other sensitive business documents.
Kotlin
Java
REST
SOAP
Apache Kafka
PostgreSQL
TypeScript
React
Redux
HTML
Docker
Kubernetes
Cucumber
Selenium
IntelliJ
Maintained Fortnox Document Archive, a core legacy product used by more than 400 000 Fortnox customers to receive, process and archive business documents such as invoices and receipts.
PHP
PostgreSQL
JavaScript
Backbone.js
Twig
HTML
Docker
Kubernetes
IntelliJ

2018-02 - 2021-03

Backend Developer, Verisure Innovation AB

Lead the development of an integration service used to deliver invoices and direct debit payment files for more than 1 000 000 customers to banks and mail distributors across Europe.
Java
Spring
JBoss / Wildfly
SOAP
T-SQL
SAP Sybase ASE
JSP
HTML
JavaScript
jQuery
IntelliJ
Maintained a critical legacy monolith business system used to manage alarms, customer data and billing for over 1 000 000 customer in northern and central Europe.
T-SQL
SAP Sybase ASE
Delphi / Object Pascal
Bash
Visual Studio Code
Designed and developed new microservices as part of Verisure's technical transformation from a monolith architecture to microservices hosted in Kubernetes.
Java
Spring Boot
REST
Apache Cassandra
API Gateway
Docker
Ansible
Kubernetes
IntelliJ
Migrated mutliple organization's ERP data from a muli-tenant on-premise Microsoft Dynamics NAV installation to a global Oracle Fusion Cloud Applications instance.
MS SQL Server
SQL Server Management Studio
PowerShell
Visual Studio Code

2017-03 - 2018-01

Software Developer, UCS IT Solutions AB

Developed integrations, migrations and custom extensions for ERP systems like Visma Business, Visma Administration and Fortnox.
C#
Windows Forms
Entity Framework
MS SQL Server
Visual Studio
Developed an email marketing tool for managing email campaigns, writing marketing emails and managing marketing segments.
PHP
Laravel
REST
MySQL
Bootstrap
jQuery
Visual Studio Code

2013-02 - 2016-07

Founder & Web Developer (part time), SNTS Media

Created and managed affiliate marketing websites recieving over 1 000 000 visitors and generating over 94,000 leads for advertisers.
Wordpress
PHP
MySQL
Developed multiple Wordpress plugins for dynamic ad placement, user tracking and for generating infographs.
PHP
SQL
MySQL
HTML
JavaScript

Personal projects

2022

Frugal Fennec Expense Manager

A single page web application for tracking expenses. It allows users to record expenses in a customizable accounts structure, view expense reports and login without a password using email verification.

github.com/santosleijon/frugal-fennec-expense-manager

Kotlin

Spring Boot

PostgreSQL

React

Redux

JUnit

Cucumber

Selenium

Docker

AWS

Education

2017

Bachelor of Science in Economics, Linköping University