Lead Backend Engineer (Ruby on Rails)

New

Sowelo Consulting sp. z o.o. sp. k.Mobile apps

Poland, Core collaboration typically in European daytimeContractLead

SalaryBase salary that goes up to $120,000 USD per year

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Job Details

Have 8+ years of professional backend development experience in production environments.
Have recent experience leading a backend team.
Have experience owning backend architecture for a mobile-first, consumer-facing app.
Have strong hands-on expertise with Ruby on Rails or another OOP language and be willing to work with Ruby on Rails.
Have experience building and scaling high-traffic systems with over 10,000 daily active users.
Understand distributed systems, relational databases, caching, and performance optimization.
Have practical cloud experience, preferably with AWS.
Be able to explain technical topics and trade-offs to non-technical stakeholders.
Have experience in a startup or fast-moving product company and be comfortable with changing priorities.

Lead and mentor a team of 4–5 mid/senior backend engineers, including 1:1s, feedback, and performance management.
Translate product and business goals into technical roadmaps, sprint plans, and backend priorities.
Own backend architecture and technical vision for mobile-first, consumer-facing apps.
Oversee implementation of mobile app features with iOS/Android, Product, Data, DevOps, and Trust & Safety teams.
Make architectural decisions about scalability, performance, reliability, data flows, and AWS infrastructure.
Identify and resolve performance bottlenecks, improve API speed and reliability, and design caching and database strategies.
Improve engineering processes, coding standards, code reviews, and deployment/CI pipelines.
Maintain technical documentation and design specifications for backend systems and major initiatives.
Code, conduct code reviews, and help resolve complex production issues.

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