Senior Backend Engineer, Security

Benefits

Parental leave

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Non-birth-parent leave

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Family-building benefits

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• Adoption assistance: Not verified
• Surrogacy assistance: Not verified

Mental health support

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Relocation assistance

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Childcare support

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Learning budget

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Verification

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Salary

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Market context

U.S. role benchmark (BLS OEWS)

$116,543 U.S. median for this role

Projected growth (BLS Employment Projections)

+9.8% - Much faster than average

Matched to SOC 15-1252 - Software Engineering aggregate by role bucket.

Source: U.S. Bureau of Labor Statistics, OEWS, May 2024 and Employment Projections, 2024-2034.

Role

Role function

Engineering From the posting source checked Jun 20, 2026

Seniority

Senior From the posting source checked Jun 20, 2026

Schedule

Shift type

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Weekend work

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Company

Company stage

Growth-stage From the posting source checked Jun 20, 2026

Equity

Offered From the posting source checked Jun 20, 2026

Application

Cover letter

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Assessment

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Deadline

Not stated

Where they hire

State eligibility is not yet verified.

About this role

Senior Backend Engineer, Security Poland About Shelf Shelf builds software that helps enterprises make AI work in the real world. That only works when our systems are secure, observable, and maintainable under real production pressure. About the Role This role is for a senior backend engineer who will focus full-time on security work. We are looking for a hands-on engineer who can improve our security posture by changing real systems, fixing real problems, and following through until the work is fully implemented and maintained. This role is embedded close to support and operational engineering, so it stays connected to real incidents, real customer impact, and real follow-through. The scope is broader than one team. You will work across the company's engineering surface wherever security work needs to land. Our backend stack includes TypeScript/Node.js, AWS and Azure, PostgreSQL/Aurora, DynamoDB, Elasticsearch, S3, queues, observability tooling, CI/CD, and infrastructure-as-code. Exact stack match matters less than backend depth, security judgment, and learning speed. Location - Warsaw, work from the office. What You Will Own Find and fix concrete security issues in production systems. Improve token lifecycle, revocation, auth flows, auditability, and access controls across backend systems. Reduce or eliminate security-sensitive data exposure in logs, events, traces, and internal tooling. Improve security detection, logging, and audit trails so incidents are easier to detect, investigate, and contain. Rotate secrets, reduce long-lived credentials, tighten access, and relentlessly follow through on overdue security hygiene work. Review security findings from scanners and assessments, separate signal from noise, fix valid

Read the full description at shelf.io. FewerJobs shows a preview and links to the original posting.