Principal Back-End Engineer Jobs

PhantomBuster

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IT - Software Development

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Not provided

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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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Principal Back-End Engineer