Senior Backend Engineer

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cargo.one

WebsiteLinkedInAll Job Openings

51 - 200 employees

🚗 Transport

🏢 Enterprise

☁️ SaaS

Transport • Enterprise • SaaS

cargo. one is a digital platform that revolutionizes air freight procurement and sales for freight forwarders and airlines. The company provides instant quote responses, comprehensive rate comparisons, and streamlined booking capabilities with a global network of more than 200 airlines and trusted agents. Tailored for enterprises and small- to medium-sized businesses, cargo. one offers a digital storefront, real-time insights, and seamless integration with existing systems to optimize pricing and enhance operational efficiency. The company empowers its users by transforming traditional emailing processes into digital interactions to secure bookings more efficiently.

📋 Description

• Own problem spaces end to end: you write the spec and the acceptance criteria, agents do much of the typing, and you own the review, the architecture and what ships. • Build AI into the product itself — for example: when an airline quotes a price over email, our AI agents turn that free-text reply into a quote the customer can book in the app. • Make AI trustworthy where a wrong number books real freight: structured outputs, evals, confidence-gated human review, monitoring. • Raise the squad's AI leverage: better specs, better harnesses, better review — your workflow improvements ship to every engineer. • Build self-service tools (Vue.js front-ends on a Python backend) so colleagues help themselves instead of filing requests — often agent-assisted, always yours to design. • Hold the quality bar in a codebase where a lot of the code is generated: automated tests, metrics, tracing, alerts, and real review discipline. • Support your users hands-on, challenge assumptions, and ask "why" before you build.

🎯 Requirements

• 5+ years of backend experience building web applications, with strong architecture instincts (request/response flow, service integration). • Strong SQL, including data consistency, indexing and race conditions. • A spec-driven way of working: you plan and define acceptance criteria before you code, and write clearly (we're remote-first). • You're fluent in the modern AI engineering stack — LLMs, agents, MCP, coding assistants, agent harnesses — and you use it daily. You ship with Claude Code or an equivalent, and you've built or wired AI into a real system. • More importantly: judgement. You validate, critique and refine what models produce, you know where they go wrong, and you know when *not* to reach for AI. • Product sense and empathy for the people using what you build. • Low-ego collaboration: you give and take feedback and work self-directed. • Bonus points: you've built your own agentic tooling, rather than just consuming it; our stack (Python 3, Flask, gRPC, PostgreSQL, Redis, Celery, Kubernetes on GCP), Vue.js, or experience raising a team's AI fluency.

🏖️ Benefits

• €650 home office budget, plus your choice of MacBook or Dell laptop delivered before day one. • Co-working access through our partner Desana. • 24 paid vacation days on top of your country's public holidays, plus special leaves. • Offsite fun and team trips: we meet twice a year as a company. • Permanent full-time employment through our partner Remote.com.