Senior Software Engineer — Remote, Open Source & Global

Lever, Inc.; Polska; On-site; PLN 270,000 - 655,000; Full time

Benefits offered by this job

Fully remote work

Flexible work arrangements

Open vacation policy

Professional development support

Internal mobility opportunities

Open-source contributions

Job summary

Lever, Inc. is partnering to hire an Experienced Software Engineer in Poland. You’ll contribute to a global, distributed product ecosystem built around open-source technology and the open web, tackling scale, performance, and collaboration challenges.

You’ll work across products and platforms with autonomy and a strong emphasis on continuous integration, frequent deployments, and open-source contribution, plus travel for in-person meetups when needed.

Qualifications

• Proven professional experience as a software engineer delivering production-quality software.
• Experience with multiple languages, frameworks, and paradigms; PHP and JavaScript are valuable, while the ability to learn new technologies is important.
• Experience working at scale, backend systems, distributed systems, or products serving a large user base.
• Strong understanding of software architecture, abstraction, system behavior, and trade-offs between complexity and value.
• Strong debugging and problem-solving abilities; interest in deep technical challenges.
• High standards for code quality, maintainability, reliability.
• Ability to work effectively in a fully distributed environment and collaborate asynchronously.
• Comfortable with CI, frequent deployments, and iterative development.
• Strong written and verbal communication skills; able to explain technical decisions.
• Willingness to travel ~3–4 weeks per year for in-person meetups.
• A degree is not mandatory; demonstrated engineering experience is central.

Responsibilities

• Design, build, improve, and maintain software across a diverse product ecosystem.
• Develop reliable, scalable solutions considering performance and user value.
• Participate in the engineering lifecycle from problem understanding to deployment.
• Diagnose and resolve complex technical issues through systematic debugging.
• Collaborate with globally distributed teams via written communication and code reviews.
• Contribute to open-source projects and engineering practices.
• Apply AI-assisted development tools to improve productivity.
• Continuously learn and adapt across languages, frameworks, architectures.

Skills

Production-grade software

Multi-language experience

Backend systems

Distributed systems

Debugging

Code quality

CI/CD

Remote collaboration

Open-source contribution

Travel willingness

Tools

PHP

JavaScript

Job description

Lever, Inc. is partnering to hire an Experienced Software Engineer in Poland. You’ll contribute to a global, distributed product ecosystem built around open-source technology and the open web, tackling scale, performance, and collaboration challenges.

You’ll work across products and platforms with autonomy and a strong emphasis on continuous integration, frequent deployments, and open-source contribution, plus travel for in-person meetups when needed.