Backend Senior PHP Developer

🌍 We’re Hiring: Product Designer
📍 Location: Remote

💡About Us

Yesim is an international eSIM provider with 7+ years of experience in delivering secure, seamless connectivity anywhere in 200 countries around the world. We specialize in fast, secure, and global connectivity through advanced eSIM mobile solutions for 3+ million active users. Our innovative app allows to manage multiple eSiMs within a single account - allowing users to effortlessly juggle several plans and share connectivity.

✨ About the Role

You will work within the backend team under the guidance of a Backend Tech Lead and report into the CDO (Chief Development Officer). You are expected to work independently on complex tasks, participate actively in code reviews, and deliver tested, production-ready code within a structured Scrum process.

This is a hands-on engineering role. You write code, you own quality, you ship.

📝 Responsibilities

• Engineering & Code Quality

• Write clean, maintainable PHP code following SOLID principles – not as theory, but as daily practice

• Design, write, and maintain unit tests (PHPUnit) and integration tests – meaningful coverage on all new and modified code

• Participate in code reviews via GitHub Pull Requests – every PR goes through review before production, no exceptions

• Work with PHPStan, CS Fixer, and linters as part of the CI pipeline – code that doesn't pass automated checks doesn't get merged

• Contribute to gradual decomposition of legacy monolith components into cleaner, modular architecture

• Own the quality of your deliverables: if your code breaks in production, you're the first person who investigates

• Delivery & Collaboration

• Work within sprint planning, daily standups, and retrospectives – Scrum is how we work, not a formality

• Deliver predictably within sprint commitments – flag blockers early, communicate proactively

• Collaborate with Tech Lead on technical decisions, architecture discussions, and estimation

• Support teammates through code reviews, knowledge sharing, and pair debugging

• Follow Definition of Ready and Definition of Done – stories enter sprints prepared and leave sprints tested

• Modern Tooling & Continuous Improvement

• Be open to adopting and learning modern development tools, including internal team solutions

• Propose improvements to codebase, tooling, and processes when you see a better way

• Contribute to CI/CD pipeline improvements and deployment process optimization

• We value engineers who ask "how can this be done better?" and then actually do it

• CI/CD & Process

• Work within GitHub Actions CI/CD pipelines

• Follow branch protection rules: PRs require approvals, no direct pushes to production

• Keep documentation current – architecture decisions, runbooks, technical debt notes

• Maintain and contribute to technical documentation: API specifications, data flow diagrams, and onboarding materials. When you build or change a system, the documentation update is part of "done"

📩What We’re Looking For

• 3+ years of professional PHP development (mixed environments: framework-based and pure PHP)

• PHP as it is (vanilla) – solid working experience (our main stacks are frameworkless)

• Laravel – working experience (not all our stacks use it)

• MySQL – query optimization, schema design, migrations

• PHPUnit – you've written tests and you believe in them, not just on your CV

• SOLID, DRY, KISS – you can explain these and demonstrate them in code review

• Experience writing and maintaining technical documentation – API docs, architecture overviews – as part of regular workflow, not as a separate task

• Git & GitHub – branching strategies, PR workflows, conflict resolution

• REST API design – you've built APIs that other teams or services consume

• Docker – local development, staging environments

• Strong understanding of code review culture – you give constructive feedback and receive it well

• English – professional working level (documentation, PR comments, technical discussions)

• Russian – minimum A1 (team communication language)

⭐️ Nice-to-Haves

• ClickHouse or other analytical databases

• AWS services (we use it alongside Hetzner)

• Experience in telecom, eSIM, or SaaS products

• Familiarity with PHPStan, CS Fixer or similar static analysis tools

• Exposure to Scrum/Agile delivery frameworks (Jira, sprint planning, retrospectives)

• ISO 27001 awareness or experience working in security-conscious environments

• Python or Bash scripting for automation

• Experience with GitHub Actions CI/CD pipelines

🎁 What We Offer

• Ownership of complex features and components from day one

• Direct collaboration with Tech Lead and CDO – your technical input matters

• Adopting modern engineering culture: modern tools and internal solutions to make work faster and smarter together