Senior Software Engineer - B2B Logistics Platform
Onhires
Remote (Europe) | Full-time | Competitive Salary + Equity
We're partnering with a fast-growing Series A B2B SaaS company building a modern logistics platform for global e-commerce.
The product connects merchants, manufacturers and logistics providers, helping businesses manage international fulfillment, enterprise integrations and real-time shipment operations through a single cloud-native platform.
As the engineering team continues to grow, we're looking for a Senior Software Engineer who enjoys solving complex backend challenges, designing distributed systems and taking ownership of products that have direct business impact.
About the Role
You'll work on the core platform behind international logistics operations, helping build systems that support enterprise customers, large-scale integrations and mission-critical business workflows.
The role combines backend engineering, distributed systems, architecture and product ownership. While you'll contribute across the full stack, the primary focus is designing reliable systems that operate at scale.
What You'll Build
You'll help design and scale a cloud-native B2B platform, working on challenges such as:
Cloud-native distributed systems
Event-driven architecture
Enterprise API & EDI integrations
International shipping and customs workflows
Real-time shipment tracking
Fault-tolerant backend services
High-volume asynchronous processing
Merchant-facing platform features
What You'll Do
Own technical solutions from architecture through production.
Design scalable backend services for complex logistics workflows.
Build resilient integrations with enterprise platforms such as OMS, WMS and TMS.
Develop reliable systems capable of handling failures, retries and large-scale asynchronous processing.
Work closely with product and engineering teams to solve business problems through technology.
Contribute across the stack where it delivers the best product outcome.
What We're Looking For
We're looking for engineers who think in systems rather than frameworks.
You'll likely be a great fit if you have:
Experience building cloud-native distributed systems in production.
Strong backend engineering experience in scalable B2B products.
Experience with event-driven architectures and complex asynchronous workflows.
Experience integrating enterprise or third-party platforms through APIs.
Strong product ownership and the ability to take solutions from architecture through production.
A solid understanding of the business context behind the systems you build.
Experience working in stable product companies with long-term ownership of products.
Strong written communication and experience collaborating in distributed teams.
Experience with TypeScript, Node.js and React is expected, but we're primarily looking for engineers who can design scalable systems, make sound architectural decisions and build software that solves complex operational challenges.
Nice to Have
Experience in logistics, supply chain, e-commerce or fintech.
Experience with shipping platforms or OMS, WMS and TMS integrations.
Familiarity with commerce platforms such as Shopify or WooCommerce.
Experience working in high-growth B2B SaaS environments.
What You'll Get
Fully remote role within Europe.
Competitive salary based on experience.
Equity package.
Employment via Employer of Record (EOR).
The opportunity to work on a product with significant engineering complexity and real-world business impact.