{"id":12687,"date":"2026-08-27T00:00:00","date_gmt":"2026-08-27T00:00:00","guid":{"rendered":"https:\/\/www.a2z-cm.com\/senior-backend-engineer-aws-apis\/"},"modified":"2026-08-28T14:20:45","modified_gmt":"2026-08-28T14:20:45","slug":"senior-backend-engineer-aws-apis","status":"publish","type":"post","link":"https:\/\/www.a2z-cm.com\/nl\/senior-backend-engineer-aws-apis\/","title":{"rendered":"Senior Backend Engineer AWS\/API&#8217;s"},"content":{"rendered":"<h4 class=\"cx_h4 cx2_introduction\">Introduction<\/h4>\n<div class=\"cx2_introduction\"><ul> <li>36 hours per week<\/li> <li>Start: 07 September 2026<\/li> <li>End: 01 June 2027<\/li> <li>Possible extension: Yes<\/li> <li>ZZP is allowed<\/li> <li>Hybrid way of work<\/li> <li>Candidates MUST live in the Netherlands at this moment<\/li> <\/ul><\/div>\n\r\n<!--more-->\r\n\r\n<h4 class=\"cx_h4 cx2_function\">Function<\/h4>\n<div class=\"cx2_function\"><p><strong>Your new company<\/strong><\/p> <p>We are New10, a financial service scale-up initiated by ABN AMRO Bank. At New10 we believe that business financing should be easy and accessible.&nbsp;<\/p> <p>We are on a quest to transform the financing ecosystem by using the speed and innovative strength of a fintech with the expertise and funding of a bank to deliver a fast, simple, and clear financing experience to SME businesses.<\/p> <p><strong>Backend Engineer &#8211; API Development<\/strong><\/p> <p><strong>The role in one line:<\/strong><br>An independent backend engineer to help build, harden, and scale our secure APIs &#8211; strong on API craft, security, and testing, and able to help drive delivery, not just execute tickets.<\/p> <p><strong>Context:&nbsp;<\/strong><br>Work across our API surface, held to real financial-institution standards for security, reliability, and testing. It&#8217;s a deliberately simple, well-structured codebase. No internal\/domain business knowledge required, that&#8217;s owned in-house. We need backend and API strength.<\/p> <p><strong>Where they add the most value:<\/strong><\/p> <p>Since internal logic is covered, their leverage is on the partner-facing platform and developer experience:<br>&#8211; Growing the API surface cleanly (new endpoints, webhooks\/callbacks, richer querying)<br>&#8211; Developer experience &#8211; clear contracts, published API specs, integration docs, sandbox environments<br>&#8211; Hardening &#8211; rate limiting, secret rotation, contract testing, pen-test remediation<br>&#8211; Scaling &#8211; repeatable multi-partner onboarding, tenant isolation, load\/performance testing, caching<br>&#8211; Platform quality &#8211; SLOs, alerting, resilience patterns<br>&nbsp;&nbsp;<br><strong>Ways of working:<\/strong><br>&#8211; Independent and self-directing &#8211; takes a capability from spec &rarr; design &rarr; tested delivery without hand-holding<br>&#8211; Helps manage the work &#8211; can break down a body of work, sequence it, and drive it to a clear &#8220;done&#8221;<br>&#8211; Spec- and documentation-driven &#8211; at home working from and writing specs, acceptance criteria, and decision records; a clear, concise writer<br>&#8211; Comfortable with AI-assisted \/ agentic development &#8211; this project is built heavily with agentic tooling; someone who can direct and review that output well is a real multiplier<br>&#8211; Quality-first and pragmatic &#8211; treats security, testing, and observability as ship-blocking, while favoring simple solutions over over-engineering<\/p><\/div>\n\r\n<h4 class=\"cx_h4 cx2_requirements\">Requirements<\/h4>\n<div class=\"cx2_requirements\"><p><strong>Core skills:<\/strong><br>&#8211; Modern backend development in TypeScript \/ Node.js &#8211; server-side HTTP services, networking fundamentals, clean typed code<br>&#8211; REST\/JSON API design &#8211; versioning, consistent error contracts, idempotency, pagination, and an API-as-contract mindset (OpenAPI)<br>&#8211; Relational data &#8211; schema design, migrations, and a data-integrity mindset<br>&#8211; Asynchronous &amp; queue-driven systems &#8211; background workers, job lifecycles, retries, idempotent processing<br>&#8211; API security &#8211; token-based auth (OAuth\/JWT), authorization and tenancy isolation, secure secret handling, &#8220;fail-closed&#8221; defaults, and awareness of industry baselines (e.g. OWASP API Security Top 10)<br>&#8211; Test-forward development &#8211; comfortable driving work through unit, integration, and contract tests as a first-class part of building, not an afterthought<br>&#8211; Hands-on AWS experience (mandatory) &#8211; must know the specifics of core AWS services (containers\/compute, queuing, managed databases, secrets, load balancing). Given the short timeline and MVP nature, we prefer they not need to onboard onto a new cloud;<br>&#8211; Cloud-native delivery &#8211; building and shipping containerized services, infrastructure-as-code (Terraform ideal), CI\/CD pipelines<br>&#8211; Observability &#8211; structured logging, metrics, tracing, and audit trails; can debug production from telemetry<br>&nbsp;<br><strong>Nice-to-haves:&nbsp;<\/strong><br>fintech or other regulated-domain experience &middot; platform \/ API-gateway team background &middot; leading a small delivery independently.<\/p><\/div>\n\r\n\r\n<h4 class=\"cx_h4 cx2_information\">Information<\/h4>\n<div class=\"cx2_information\"><p>Jobs A2Z-CM +31(0)20-3337629<\/p><\/div>\n\r\n<h4 class=\"cx_h4 cx2_application\">Application<\/h4>\n<div class=\"cx2_application\"><p>Jobs A2Z-CM +31(0)20-3337629<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<h4 class=\"cx_h4 cx2_introduction\">Introduction<\/h4>\n<div class=\"cx2_introduction\"><ul> <li>36 hours per week<\/li> <li>Start: 07 September 2026<\/li> <li>End: 01 June 2027<\/li> <li>Possible extension: Yes<\/li> <li>ZZP is allowed<\/li> <li>Hybrid way of work<\/li> <li>Candidates MUST live in the Netherlands at this moment<\/li> <\/ul><\/div>","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[58,20,19],"tags":[46,22,24],"class_list":["post-12687","post","type-post","status-publish","format-standard","hentry","category-back-end","category-development-programming","category-publications","tag-amsterdam","tag-development-programming","tag-the-netherlands","functiongroups-development-programming","functions-back-end","sector-banking","worklocation-amsterdam","country-the-netherlands","procedure-zzp-and-or-contracting","business-line-default","hours-per-week-31","pubid-list-16991"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - 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