Senior Backend Engineer (.NET / C# / Azure)
About Ship2Port
Ship2Port, powered by Royal Dirkzwager, is a 24/7 maritime intelligence and ISPS security platform used by terminals, shipping agencies, port authorities, and service providers across Europe. The platform tracks 200,000+ vessels worldwide, processes 500,000+ ISPS terminal and ship visits annually, and integrates with 60+ port ecosystems. We are ISO 27001 certified and ISPS-compliant - reliability and security are not buzzwords here, they are requirements.
We are looking for a senior .NET developer who thrives in a complex, real-world domain and does not need hand-holding to deliver.
The Role
You will be a core member of a small, high-ownership engineering team building and evolving the backend that powers Ship2Port. You will work across a complex maritime domain - vessel tracking, ISPS gate automation, port planning, arrival/departure intelligence - and own the services that port operators and shipping professionals rely on around the clock.
This is not a role for someone who needs perfect specs to get started. You will take full ownership of services from design through production, contribute to architectural decisions, and proactively identify and fix problems before they affect users.
What You'll Work On
Build and maintain .NET microservices and APIs at production scale
Design and evolve clean, domain-driven architectures: Clean Architecture, CQRS, DDD
Work with a rich data layer: SQL Server, Azure-hosted databases, REST and event-driven integrations
Collaborate on API design with the Angular frontend team (REST / BFF patterns)
Ship via Azure DevOps CI/CD pipelines to Azure Container Apps using Docker
Integrate with external providers and AIS data feeds
Leverage AI-assisted development tools (Claude) as part of your daily workflow
Participate in architecture and technical direction decisions - your opinion will carry weight
What We're Looking For
Must-haves:
5+ years of professional backend development with C# and ASP.NET Core
Fluent in Polish and English
Strong understanding of OOP, SOLID principles, and software design patterns
Solid experience with Entity Framework Core and relational databases (SQL Server)
Hands-on experience with Clean Architecture, Microservices, and CQRS
Experience with REST API design and building API-first services
Strong command of Docker and containerized deployments
Experience with CI/CD pipelines - we use Azure DevOps
Clean code as a practice - you write code your colleagues can confidently extend
Genuine ability to self-direct: loosely defined problem -> breakdown -> delivery
Strong plus:
Experience with Microsoft Azure (Container Apps, Service Bus, Blob Storage, Key Vault)
Familiarity with Angular - ability to read and understand frontend code
Background in maritime, logistics, or industrial B2B SaaS
Experience with real-time data processing (AIS feeds, WebSockets, event streaming)
Familiarity with AI-assisted development tools
How We Work
Small team, high trust - no micromanagement, no approval chains for every decision
Azure DevOps workflow - PRs, reviews, and automated pipelines keep quality high without bureaucracy
Observability-first - we monitor, alert, and fix things before users notice
Clean code culture - we refactor, we review, we don't let tech debt compound silently
Periodic on-site workshops in the Torun/Bydgoszcz area (every few months)
What We Offer
Competitive B2B rate benchmarked to your market
Remote-friendly setup - we care about output, not location
Direct impact on a platform used by maritime professionals across Europe 24/7
Work in a genuinely complex domain - ISPS compliance, real-time vessel intelligence, port operations
A lean, senior team where your backend decisions actually ship
AI tooling as a first-class part of the workflow - not an afterthought
Are you the perfect match?
Send your portfolio, CV, and a short message about why you’re the perfect match to us
Want to know more?
Do you have any questions about this position? Feel free to contact our technical lead Sylwester Wieczorkowski