Senior Fullstack Developer, Tech Lead

Summary

Join Netguru, a Certified B Corporation®, and help shape the world through beautiful software. We're a global team working with diverse clients. This senior Ruby on Rails developer role requires 5+ years of experience, expertise in various technologies (Ruby on Rails, React.js, TypeScript, SQL/NoSQL databases, API design), and strong communication skills. You will develop high-quality software, analyze existing code, collaborate with clients, and mentor team members. We offer competitive salaries, benefits through the WorkSmile platform, Apple product discounts, and a home-office bonus for B2B contractors.

Requirements

• 5+ years experience and advanced knowledge of Ruby and Ruby on Rails development, including tools like Active Record and RSpec
• Experience with SQL (PostgreSQL, MySQL) and/or NoSQL databases (MongoDB, DynamoDB)
• Experience in designing secure APIs (REST, GraphQL, WebSockets) with authentication & authorization (JWT, OAuth)
• Strong knowledge of React.js, including integration with Rails applications or frameworks like Next.js
• Proficiency in TypeScript and ES2015+ (modern JavaScript and ECMAScript specs)
• Experience optimizing application performance, including database queries, caching, and frontend performance/SEO best practices
• Knowledge of how to create DRY and S.O.L.I.D. code
• Experience with RWD and the mobile-first approach
• Understanding of security principles in software development
• Experience in working in different projects both public and private sector
• Experience in working with third party integrations
• Good knowledge of testing practices, including TDD, unit tests, integration tests, automation tests, etc
• Excellent communication skills - ability to collaborate with clients, designers, and non-technical stakeholders
• Ability to dissuade a client/team from making wrong decisions based on experience, providing guidance and expertise in your field
• Excellent knowledge of written and spoken English (C1+)

Responsibilities

• Develop and implement the highest-quality application software within deadlines and in accordance with our guidelines for high-quality code
• Deep dive analysis of and introducing improvements to existing code base
• Understand the business side of the project and be able to lead in-depth technical discussions with partners and customers
• Thorough understanding of agile development methodology
• Very strong in applying design patterns and practices
• Recognize upcoming trends and technologies which might be presented to the clients with the right business cases, references and context
• Participate in the documentation and execution of system testing
• Implement and follow strong code review process at peer level, architect level and customer level
• Guide and mentor the project team in technical aspects
• Help to identify and mitigate project risks that impact delivery
• Support/mentor developers and other project members (e.g. PMs, QAs, PDs)
• Participate in project scope estimation and execution, ensuring technical feasibility, accurate effort assessments, and clear task prioritization

Preferred Qualifications

• Experience with Kubernetes, AWS, Terraform, Contentful, DataDog, StatsD
• DevOps experience with CI/CD, Ansible, Docker
• Experience with Vue.js or Angular
• Open-source contributions
• Experience in recruiting developers

Benefits

• Access to the WorkSmile platform, offering benefits adapted to your preferences
• Discounts on Apple products
• One-time PLN 1000 home-office bonus for B2B contractors, and PLN 175 monthly lump sum (ryczałt) for remote employees
• Various internal initiatives: webinars, knowledge sharing sessions, internal conferences