Senior Software Engineer

EasyPost is looking for a hands-on Senior Software Engineer to help build and operate our secure document-delivery platform.

Our customers use EasyPost to send invoices and business documents through channels such as Peppol e-invoicing, Belgian eBox, electronic registered delivery, e-signing, email and print. Behind this experience is a large event-driven AWS platform that processes sensitive documents, integrates with external providers and coordinates long-running delivery workflows.

Our business model is exactly as our name suggests. Easy! By working with us, businesses and public sector organisations not only save money, but also time.

You will take ownership of features from technical design through production. This role focuses on backend and cloud engineering. You will work closely with our team lead, product management and other engineers to design reliable, secure and maintainable solutions.

As one of the team’s senior engineers, you will also help shape the platform’s architecture, evaluate technical trade-offs and turn business requirements into practical technical designs.

What you will do

• Design and develop TypeScript services, AWS Lambda functions and NestJS APIs.

• Build and maintain serverless infrastructure using AWS CDK.

• Translate business requirements into clear technical designs together with the team lead.

• Contribute to architectural decisions and document their context, trade-offs and consequences.

• Create resilient event-driven workflows that handle retries, duplicate events, timeouts, concurrency and partial failures.

• Integrate with external e-invoicing, e-delivery and e-signing providers through APIs and webhooks.

• Work with AWS services such as Lambda, DynamoDB, EventBridge, SQS, Step Functions, API Gateway, S3 and CloudWatch.

• Apply security practices including encryption, least-privilege access, audit logging and safe handling of sensitive data.

• Write unit, integration and end-to-end tests using Jest.

• Monitor production systems and investigate issues across application code, AWS infrastructure and external integrations.

• Review code, mentor colleagues and raise engineering standards across the team.

• Improve our development, CI/CD and deployment processes.

• Collaborate with frontend engineers to ensure backend services and APIs support complete, reliable user journeys.

What we have to offer

You’ll be joining a dynamic environment that offers opportunities for personal development. You’ll work in a trendy, open-plan workspace that’s inspiring and comfortable. Our offices in Brussels (Neder-over-Heembeek) are easily accessible by car or public transport.

Hybrid schedule: 3 days at th office/2 days working from home

We offer a full-time contract, combined with an attractive salary package and fringe benefits such as meal vouchers, hospitalisation insurance, net allowance, car, laptop, …

Interested? Let’s talk!