> Markdown version of [/jobs/ext/2989946-senior-software-ingenieur](https://www.wearedevelopers.com/jobs/ext/2989946-senior-software-ingenieur). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior software-ingenieur - **Company:** Rent-your-recruiter - **Location:** Grimbergen, Belgium - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Microsoft Word, JavaScript (Programming Language), Application Programming Interfaces (APIs), Amazon Web Services, Amazon S3, Audit Trail, Automation of Tests, Cloud Engineering, Code Review, Continuous Integration, Amazon DynamoDB, Elasticsearch, NoSQL, E2e Testing, TypeScript, Extensible Markup Language (XML), AWS Cdk, ReactJS, State Machines, AWS Lambda, Backend, Servicebus, Event Driven Architecture, Integration Frameworks, Bitbucket, Front End Software Development, Cloudwatch, Api Gateway, NestJS, Restful APIs, Amazon Simple Queue Service (SQS), Webhooks, Serverless Computing - **Published:** September 19, 2026 - **Apply:** https://www.adzuna.be/details/5890319476 ## About the Role * Senior-level experience designing, building and operating production software. * Strong TypeScript and Node.js skills. * Hands-on experience with AWS serverless or event-driven systems. * Experience defining infrastructure as code, preferably with AWS CDK. * The ability to design systems, evaluate trade-offs and communicate technical decisions clearly. * A good understanding of distributed-system concepts such as idempotency, eventual consistency, retries, dead-letter queues and event ordering. * Experience building REST APIs and third-party integrations. * Experience with NoSQL data modelling, preferably DynamoDB. * A security-conscious approach to personal data, credentials, permissions and encryption. * Experience with automated testing, code review and CI/CD. * The ability to troubleshoot complex production issues. * Clear English communication and the ability to work effectively with engineering and product stakeholders. * A strong sense of ownership-from the first design decision to how the feature behaves in production. * The willingness to mentor colleagues and help the team make sound technical decisions. Useful additional experience * NestJS. * React or Ant Design. * Nx monorepositories. * OpenSearch or Elasticsearch. * Bitbucket Pipelines. * Multi-account AWS environments. * PDF, Word, XML or UBL document processing. * Peppol, e-invoicing, e-signatures or registered electronic delivery. * Modernising a large existing platform while keeping it operational. * Writing technical designs or Architecture Decision Records. You do not need prior experience with our specific document-delivery channels. We care more about your ability to understand complex systems and learn new domains quickly. ## Description 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. Your role 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. ## Related Videos - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [Navigating the Corporate Jungle: Life as a Developer in a large Company](https://www.wearedevelopers.com/videos/621-navigating-the-corporate-jungle-life-as-a-developer-in-a-large-company) - [Streaming AI Responses in Real-Time with SSE in Next.js & NestJS](https://www.wearedevelopers.com/videos/1630-streaming-ai-responses-in-real-time-with-sse-in-next-js-nestjs) - [NoSQL Data Modeling for Front-end Developers](https://www.wearedevelopers.com/videos/297-nosql-data-modeling-for-front-end-developers) ## Related Articles - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Software Developer Salary in The Netherlands [2023]](https://www.wearedevelopers.com/magazine/217-software-developer-salary-in-the-netherlands-2023) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [How to land a developer job in Amsterdam](https://www.wearedevelopers.com/magazine/36-how-to-land-a-developer-job-in-amsterdam)