Consulting Assignment - Senior Ruby on Rails Developer for Code Review

Project overview

We are looking for a senior Ruby on Rails developer for an ongoing part-time assignment as an external code reviewer. The assignment concerns an accounting system under development with support for bookkeeping, VAT, and supplier invoices. In the future, a service for e-signing with BankID is also planned.

About the assignment

You will review the code at each milestone and provide written findings in Swedish, prioritized by severity. The review primarily covers:

The technology stack includes Rails 8, PostgreSQL, Hotwire, Tailwind, Solid Queue, and Kamal. Development is done with AI support, automated tests, and security scanning.

• Login, permissions, and isolation of data between companies
• Security in the web application according to OWASP or equivalent
• Handling of amounts and VAT calculations
• Data model and code quality

Requirements

Experience with accounting systems, payments, BankID, or PAdES signing is a merit.

Practicalities

Send CV, a brief description of your experience with code or security review, hourly rate, and earliest start date.

• At least five years of experience with Ruby on Rails in production
• Experience with web application security according to OWASP ASVS or equivalent
• Swedish spoken and written
• Start at the beginning of 2027
• Scope 4–8 hours per month, ongoing
• Remote work from Sweden. Code and data must not leave Sweden.

Project details

• Start: i början av 2027
• Remote: remote
• Location: Sweden, SE
• Languages: Swedish