Senior Software Engineer

Creditstar Group; Polska; Remote; PLN 246,000 - 295,000; Full time

Benefits offered by this job

Remote work option

Dynamic international team

Competitive remuneration package

Modern Tallinn office

Birthday day off

Job summary

Creditstar Group, a fast-growing international consumer finance technology company, seeks a seasoned PHP backend engineer with leadership responsibilities. You will design scalable backend architecture, lead key initiatives, mentor engineers, and collaborate across product and QA teams.

The role involves optimizing databases and services, maintaining high performance, and driving modernization across legacy systems. Tallinn-based office with remote work options is available.

Qualifications

• 5-7+ years of commercial PHP development experience.
• Strong knowledge of PHP 8.0+ and backend engineering best practices.
• Experience with Yii2 and frontend (TypeScript, React).
• Experience designing scalable backend systems and APIs.
• Strong PostgreSQL experience and query optimization.
• CI/CD, Git workflows, and code reviews.
• Debugging, root-cause analysis, and incident management.
• Leadership: drive major technical initiatives and mentor engineers.

Responsibilities

• Design and evolve scalable backend architecture and core platform services.
• Lead technical initiatives from solution design and estimation through production release.
• Develop new functionality, improve existing systems, and reduce technical debt.
• Ensure system scalability, reliability, performance, and maintainability.
• Optimize databases, APIs, caching layers, and background processing.
• Identify and resolve production incidents, bottlenecks, and technical risks.
• Participate in architectural decision-making and long-term platform evolution.
• Conduct code reviews and maintain engineering quality standards.
• Mentor developers, support onboarding, and provide technical leadership within the team.
• Collaborate with Product, Growth leads, QA, and other engineering teams.

Skills

PHP development

Backend architecture

Leadership

Mentoring

Problem solving

Communication

Tools

Yii2

TypeScript

React

Git

CI/CD

PostgreSQL

Job description

Creditstar Group is a rapidly growing international consumer finance company, headquartered in Tallinn, Estonia and operating in multiple European markets.

At the core, we are a financial technology company that uses automated processes, algorithms and data analysis to make financial instruments easily available to a population of more than 175 million people in our target markets. We are a team of ambitious professionals who value innovation, effective efficiency, high growth, and high performance. For more information on the group, please visit www.creditstar.com.

Our vision is to build and deliver digital banking products of the future. If you want to be part of this, here is your chance.

What's in it for you?

• Ownership from day one. You'll shape the technical direction of the platform, not just execute tickets. We trust our engineers to drive decisions
• A team that values craft. We allocate dedicated capacity to technical debt, run regular architecture discussions, and take engineering quality seriously - not just velocity

Key Responsibilities:

• Design and evolve scalable backend architecture and core platform services
• Lead technical initiatives from solution design and estimation through production release
• Develop new functionality, improve existing systems, and reduce technical debt
• Ensure system scalability, reliability, performance, and maintainability
• Optimize databases, APIs, caching layers, and background processing
• Identify and resolve production incidents, bottlenecks, and technical risks
• Participate in architectural decision-making and long-term platform evolution
• Conduct code reviews and maintain engineering quality standards
• Mentor developers, support onboarding, and provide technical leadership within the team
• Collaborate with Product, Growth leads, QA, and other engineering teams

Requirements

Technical:

• 5-7+ years of commercial PHP development experience
• Strong knowledge of modern PHP (8.0+) and backend engineering best practices
• Solid hands-on experience with Yii2 or willing to learn
• Experience with frontend development(Typescript, React)
• Experience designing scalable backend systems with a strong grasp of software architecture and system design principles
• Strong PostgreSQL experience: schema design, indexing, query optimization, performance tuning
• Experience designing APIs and service integrations
• Solid Git workflows, code review practices, and CI/CD experience
• Strong debugging, troubleshooting, and root-cause analysis skills

Leadership & Ownership:

• Proven experience leading major technical initiatives
• Ability to independently drive projects from design to production
• Experience working with large legacy codebases and driving incremental modernisation without disrupting business operations
• Strong estimation, planning, prioritisation, and risk management skills
• Experience mentoring engineers

Soft skills:

• Strong analytical and problem-solving mindset
• Effective communication and collaboration in cross-functional teams
• High autonomy, accountability, and product ownership
• Product-oriented thinking with a focus on business impact

Nice to have:

• Experience in fintech
• Hands-on experience with AI-assisted development tools (Claude Code, Cursor, Copilot, etc.)

Benefits

• Dynamic, challenging, and rewarding work within a rapidly growing international company;
• Chance to contribute to the business' decision-making processes and making a tangible impact;
• Talented and fun international team who always has your back;
• New modern office in the heart of Tallinn
• Sports or Health insurance compensation
• Paid birthday day- off
• Regular company parties and events;
• Office with games, ping pong table, free snacks/drinks and the possibility to work remotely;
• Powerful equipment and modern tools;
• On-demand sponsorship for your professional development;
• Competitive remuneration package

Gross salary range for this position is €5000-€6000 per month.