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Principal Back-End Engineer

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PhantomBuster

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IT - Software Development

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Job Description:

We’re hiring a Principal Platform Engineer to lead backend and platform architecture, lift reliability and developer velocity, and introduce safe, pragmatic AI to speed delivery and quality for thousands of users.

Job Responsibility:

  • Anticipate product and infrastructure needs for growth and reliability
  • Set the bar for testing, observability, performance, and security
  • Drive code reviews on critical paths, preventing bugs and debt from reaching production
  • Champion AI-assisted engineering: from code generation and testing to debugging
  • Establish guardrails for safe and effective use of AI (human review, bias detection, security)
  • Identify opportunities to leverage AI internally (developer productivity, monitoring, anomaly detection)
  • Mentor engineers and tech leads, helping them level up
  • Share knowledge through workshops, design sessions, and documentation
  • Partner with Product, Frontend, and AI squads to ensure seamless integration and zero-downtime releases
  • Lead cross-functional initiatives on reliability, cost optimization, or security
  • Play a key role in high-impact incidents, post-mortems, and remediation planning
  • Drive improvements in SLOs, alerting, and automation for resilience
  • Explore new technologies (cloud, orchestration, AI/ML pipelines)
  • Propose POCs to validate technical opportunities

Requirements:

  • 8–12+ years in backend/infrastructure engineering, ideally in SaaS at scale
  • Proven track record in a Staff, Principal, or senior technical leadership role
  • Experience leading large, distributed, or high-complexity systems
  • Expert in TypeScript / Node.js, PostgreSQL, Redis, and modern caching/queuing systems
  • Strong cloud experience (AWS preferred), infrastructure-as-code, containers, and CI/CD pipelines
  • Solid grounding in system design, reliability, and security principles
  • Strong observability skills (metrics, tracing, logging)
  • Familiarity with modern AI/ML stacks: vector databases, embeddings, prompt engineering, LLM-based tools
  • Exceptional communicator, able to explain complex tradeoffs clearly
  • Pragmatic decision-maker balancing speed, quality, and sustainability
  • Collaborative, approachable, and proactive in mentoring
  • Strong ownership mindset, with the ability to anticipate risks and unblock others

Nice to have:

  • Experience with AI/ML production systems (model serving, evaluation pipelines)
  • Experience with frontend frameworks (React) or full-stack development
  • Contributions to open-source or technical publications
  • Hands-on experience in cloud cost optimization or security hardening
What we offer:
  • Fully remote working environment
  • €40/month for your Internet connection
  • Flexible working time
  • Home office budget up to €1500
  • 100% of an Alan Blue subscription
  • Lunch vouchers - €8 (50% The Phantom Company) / worked day
  • Partnership with MokaCare
  • €70 a month benefit for entertainment expenses
  • Book Allowance and Sharing Program

Additional Information:

Job Posted:
December 11, 2025

Work Type:
Remote work
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