Principal Software Engineer (.NET)
Confirmed on the employer's own hiring board on Oct 30, 2026. First seen by Alion on Sep 2, 2026.
Everything we do is for our customers!
Featured on Deloitte's Technology Fast 500 list and G2's leaderboard, Maropost offers a unified commerce experience that our customers need, transforming ecommerce, retail, marketing automation, merchandising, helpdesk and AI operations with one platform designed to scale for fast-growing businesses. With a relentless focus on our customers’ success, we are motivated by customer obsession, extreme urgency, excellence and resourcefulness to to power 5,000+ global brands while we head to 100,000+.
Driven by the same customer-centric mentality as above, we empower businesses to achieve their goals and grow alongside us. If you're a driver and not passenger and are ready to make a significant impact and be part of our transformative journey, Maropost is the place for you.
The Opportunity:
Thrive on change and grow beyond limits! We are looking for a bold thinker who sees a chance to learn and define what's possible with every challenge! Ready to make an impact? Welcome to Maropost and you can turn ideas into action!
As a Principal Software Engineer (.NET), you will serve as a technical thought leader, architecting large-scale distributed systems, guiding engineering excellence across teams, and enabling long-term technology direction. This role requires deep expertise in .NET, cloud-native architecture, system design, and the ability to steer engineering strategy while remaining hands-on.
What You'll Be Responsible For:
- Define and evolve the technical architecture and engineering roadmap for complex systems.
- Strong experience in architecting cloud-native, high-availability distributed systems and microservices, with end-to-end system design expertise covering scalability, fault tolerance, and security.
- Influence engineering standards, best practices, and long-term platform strategy while providing technical oversight across multiple teams and projects.
- Evaluate emerging technologies and recommend adoption strategies.
- Strong knowledge of multithreading, concurrency, parallel programming, and high-throughput systems.
- Strong ability to drive end-to-end system design while making key architectural trade-offs across scalability, cost, latency, resilience, maintenance, and security.
- Excellent problem-solving skills, system-thinking mindset, and ability to break down complex engineering challenges.
- Write high-quality, performant, maintainable code.
- Conduct deep-dive reviews of architecture, design documents, and critical code.
- Lead complex debugging sessions, performance optimization, and production incident resolution.
- Represent engineering in architecture forums and governance groups.
What You'll Bring to Maropost:
- Bachelor's or master's degree in computer science or a related field.
- 12+ years of hands-on software development experience with progressively increasing responsibilities.
- 5+ years of strong expertise in .NET / .NET Core, C#, and enterprise-grade backend frameworks.
- Experience architecting solutions on GCP, Azure, or AWS.
- Expertise in relational and NoSQL data stores - SQL Server, PostgreSQL, MongoDB, Redis, etc.
- Expertise with CI/CD pipelines, Git workflows, DevOps best practices, and production automation.
- Strong exposure to modern UI frameworks (React/Angular/Vue) and understanding of front-end integration patterns.
- Solid understanding of observability, including distributed tracing, structured logging, telemetry, performance monitoring.
- Proven expertise in designing scalable APIs, asynchronous workflows, and integration patterns using event-driven and messaging architectures (Kafka, RabbitMQ, Azure Service Bus, EventHub).
- You exemplify Maropost’s Values:
o Customer Obsessed
o Extreme Urgency
o Excellence
o Resourceful
Message from the Founders:Maropost is looking for builders - people who want to drive our business forward at all costs in order to achieve the goals we have both short and long term for the results and outcomes that that will bring to us all.
If that isn't for you that’s ok, for those of you that it is please get in touch with us!