https://fdetimes.net/en/News, analysis, guides, a learning roadmap and jobs for Forward Deployed Engineers.enhttps://fdetimes.net/en/guides/secure-webhook-receiver-signatures-replay-duplicates/https://fdetimes.net/en/guides/secure-webhook-receiver-signatures-replay-duplicates/Fri, 09 Oct 2026 07:38:05 GMTStripe can resend the same event for up to three days, with a new signature each time. A time window cannot stop those duplicates, so your receiver needs a separate line of defence.https://fdetimes.net/en/guides/data-reconciliation-before-saying-it-works/https://fdetimes.net/en/guides/data-reconciliation-before-saying-it-works/Fri, 09 Oct 2026 07:38:01 GMTAn all-green dashboard does not mean the numbers are right. The client's chief accountant decides whether they are right, and she will check them against her own ledger.https://fdetimes.net/en/guides/dpa-data-terms-procurement-for-fdes/https://fdetimes.net/en/guides/dpa-data-terms-procurement-for-fdes/Fri, 09 Oct 2026 07:37:49 GMTA pipeline that works can still stop because legal emails one question: where does the customer's data go, who holds it, and for how long? That only becomes a problem if you don't already have the answer.https://fdetimes.net/en/books-courses/inspired-marty-cagan-fde-feature-factory/https://fdetimes.net/en/books-courses/inspired-marty-cagan-fde-feature-factory/Fri, 09 Oct 2026 07:36:26 GMTMarty Cagan writes for product managers, but his thinking names the trap FDEs fall into most often: shipping every feature on the customer's list without knowing what problem has been solved.https://fdetimes.net/en/books-courses/hugging-face-mcp-course-review/https://fdetimes.net/en/books-courses/hugging-face-mcp-course-review/Fri, 09 Oct 2026 07:33:42 GMTThe free course has three parts. Only one of them resembles what an FDE actually does on a customer site.https://fdetimes.net/en/analysis/how-many-clients-can-an-fde-handle/https://fdetimes.net/en/analysis/how-many-clients-can-an-fde-handle/Fri, 09 Oct 2026 07:31:58 GMTNo company has published this figure. The playbooks still agree on one point: how many accounts you can carry depends on the phase each account is in and on how much of the work has been turned into tools.https://fdetimes.net/en/tools/metabase-self-service-dashboards-client-database/https://fdetimes.net/en/tools/metabase-self-service-dashboards-client-database/Fri, 09 Oct 2026 07:31:06 GMTInstalling Metabase takes minutes. The hard part is the three decisions that follow: the database account, group permissions and the embedding method. Get any one of them wrong and a polished afternoon demo turns into next week's incident.https://fdetimes.net/en/guides/first-eval-inspect-ai-guide/https://fdetimes.net/en/guides/first-eval-inspect-ai-guide/Fri, 09 Oct 2026 06:38:17 GMTWith just three questions about a returns policy, a string-matching scorer can grade a model 3/3 when it actually got only 1/3 right. Only the log file will show you that.https://fdetimes.net/en/guides/sub-agent-skill-or-mcp-server/https://fdetimes.net/en/guides/sub-agent-skill-or-mcp-server/Fri, 09 Oct 2026 06:37:13 GMTAn agent can fail at a client site even when the model is perfectly capable. Often the cause is simply that business process knowledge was put in the wrong place: the system prompt, a tool description, or a sub-agent nobody needed.https://fdetimes.net/en/guides/how-to-say-no-to-client-design/https://fdetimes.net/en/guides/how-to-say-no-to-client-design/Fri, 09 Oct 2026 06:36:34 GMTA refusal that comes with a reason and an alternative, and gets written down, usually keeps a client’s trust better than a yes.https://fdetimes.net/en/books-courses/aws-cloud-practitioner-essentials-for-fdes/https://fdetimes.net/en/books-courses/aws-cloud-practitioner-essentials-for-fdes/Fri, 09 Oct 2026 06:34:57 GMTAWS's beginner cloud course will not turn you into an infrastructure architect. It will help you keep up in your first meeting on a client's systems.https://fdetimes.net/en/analysis/fde-product-unfinished-custom-code/https://fdetimes.net/en/analysis/fde-product-unfinished-custom-code/Fri, 09 Oct 2026 06:34:14 GMTInvestors disagree about whether forward deployed engineering is a deliberate strategy or a sign that a company is turning into a consultancy. The answer lies in what happens to the code after each deployment.https://fdetimes.net/en/tools/sentry-for-forward-deployed-engineers/https://fdetimes.net/en/tools/sentry-for-forward-deployed-engineers/Fri, 09 Oct 2026 06:30:19 GMTYou have no SSH access, no logs, and a client who just writes "it's broken". Sentry tells you what failed, where, and in which release.https://fdetimes.net/en/guides/define-ai-acceptance-criteria-with-clients/https://fdetimes.net/en/guides/define-ai-acceptance-criteria-with-clients/Fri, 09 Oct 2026 05:36:09 GMTThe client wants a system that is ‘always right’. Any model will sometimes be wrong. If you want the project signed off, agree on how many errors the client will accept in the very first week.https://fdetimes.net/en/books-courses/berkeley-agentic-ai-mooc-for-fdes/https://fdetimes.net/en/books-courses/berkeley-agentic-ai-mooc-for-fdes/Fri, 09 Oct 2026 05:34:10 GMTFor a Forward Deployed Engineer, the first lecture to watch in this course is about running agents in production, not about models.https://fdetimes.net/en/analysis/outcome-based-pricing-ai-agents-fde/https://fdetimes.net/en/analysis/outcome-based-pricing-ai-agents-fde/Fri, 09 Oct 2026 05:33:56 GMTSierra and Intercom charge for outcomes, so defining what counts as "resolved" is a contract term and a measurement problem. It is also everyday work for engineers who work alongside customers.https://fdetimes.net/en/books-courses/working-effectively-with-legacy-code-fde/https://fdetimes.net/en/books-courses/working-effectively-with-legacy-code-fde/Fri, 09 Oct 2026 05:30:56 GMTThe customer system you are about to wire an LLM into almost certainly has no tests. Michael Feathers explained how to handle that more than twenty years ago.https://fdetimes.net/en/tools/litellm-proxy-virtual-keys-budgets/https://fdetimes.net/en/tools/litellm-proxy-virtual-keys-budgets/Fri, 09 Oct 2026 05:29:04 GMTWhen three clients share one OpenAI account, someone will ask who spent what sooner than you expect. A self-hosted gateway is the cleanest answer.https://fdetimes.net/en/guides/thumbs-down-feedback-to-eval-test-cases/https://fdetimes.net/en/guides/thumbs-down-feedback-to-eval-test-cases/Fri, 09 Oct 2026 04:38:00 GMTWhen a client sends you a file full of "dissatisfied" clicks, the first job is to read the traces and label them, not to count the clicks.https://fdetimes.net/en/guides/frontline-resistance-ai-pilot-fde/https://fdetimes.net/en/guides/frontline-resistance-ai-pilot-fde/Fri, 09 Oct 2026 04:37:16 GMTA pilot starts to fail when the model works but users quietly ignore it. The fix is on the shop floor, next to the people using the tool. It is not in the code.https://fdetimes.net/en/guides/clean-messy-client-excel-pandas/https://fdetimes.net/en/guides/clean-messy-client-excel-pandas/Fri, 09 Oct 2026 04:34:44 GMTA single "not yet" in a money column can make reported revenue lower than it really is, and nobody notices, because pandas treats a missing cell as zero.https://fdetimes.net/en/analysis/fde-cv-measured-results-not-frameworks/https://fdetimes.net/en/analysis/fde-cv-measured-results-not-frameworks/Fri, 09 Oct 2026 04:33:54 GMTPeople hiring forward deployed engineers read a CV looking for a result they can verify, so a line reading “LangChain, Kafka, Kubernetes” tells them almost nothing.https://fdetimes.net/en/books-courses/release-it-nygard-production-stability-fde/https://fdetimes.net/en/books-courses/release-it-nygard-production-stability-fde/Fri, 09 Oct 2026 04:32:20 GMTA client API that suddenly hangs for 30 seconds per call can drain your service's threads in just 5 seconds. This 376-page book shows how to break that chain of failures at design time.https://fdetimes.net/en/books-courses/hugging-face-llm-course-first-three-chapters/https://fdetimes.net/en/books-courses/hugging-face-llm-course-first-three-chapters/Fri, 09 Oct 2026 04:31:09 GMTThe course is free and available in many languages. Its first three chapters can be read as the order of work at a client site: set a baseline first, inspect the data next, fine-tune last.https://fdetimes.net/en/tools/retool-internal-tools-when-to-use-react/https://fdetimes.net/en/tools/retool-internal-tools-when-to-use-react/Fri, 09 Oct 2026 04:30:55 GMTRetool can get you a demo in your first week on a client site, but only if you know in advance where it stops paying off.https://fdetimes.net/en/guides/fde-portfolio-repo-agent-evals-readme/https://fdetimes.net/en/guides/fde-portfolio-repo-agent-evals-readme/Fri, 09 Oct 2026 03:03:30 GMTA polished demo only proves the agent got it right once. A repo worth sending shows where the agent fails and how often.https://fdetimes.net/en/analysis/ai-writes-code-fde-owns-outcome/https://fdetimes.net/en/analysis/ai-writes-code-fde-owns-outcome/Fri, 09 Oct 2026 02:59:21 GMTSalesforce has written into its FDE job listing that code may come from AI tools, but the person accountable for the result must still be an engineer.https://fdetimes.net/en/books-courses/pyramid-principle-minto-writing-for-fdes/https://fdetimes.net/en/books-courses/pyramid-principle-minto-writing-for-fdes/Fri, 09 Oct 2026 02:58:24 GMTAt consulting firms, a draft can come back with a single instruction: "make it Minto". Forward deployed engineers, who write for client leadership, would do well to pick up the same habit.https://fdetimes.net/en/tools/pydantic-ai-typed-tools-evals/https://fdetimes.net/en/tools/pydantic-ai-typed-tools-evals/Fri, 09 Oct 2026 02:55:04 GMTIn Pydantic AI, switching models takes a one-string edit. To show a client the agent still works afterwards, you also need an eval suite and a pinned library version.https://fdetimes.net/en/books-courses/karpathy-neural-networks-zero-to-hero/https://fdetimes.net/en/books-courses/karpathy-neural-networks-zero-to-hero/Fri, 09 Oct 2026 02:54:18 GMTWhen a client asks why a model gave the wrong answer, an FDE who has written backprop and a tokenizer by hand can explain it. Someone who only knows how to call the API cannot.https://fdetimes.net/en/guides/iso-20022-payment-data-profiling-for-ai/https://fdetimes.net/en/guides/iso-20022-payment-data-profiling-for-ai/Fri, 09 Oct 2026 02:00:57 GMTA bank that has moved to the new message standard does not necessarily have clean data. Measure how clean it is before a model learns the wrong things.https://fdetimes.net/en/guides/llm-invoice-contract-extraction-validation/https://fdetimes.net/en/guides/llm-invoice-contract-extraction-validation/Fri, 09 Oct 2026 02:00:51 GMTJSON that parses is not the same as JSON that is correct. This guide builds a pipeline that knows when to trust a figure and when to send it to a human reviewer.https://fdetimes.net/en/guides/present-pilot-results-to-executives/https://fdetimes.net/en/guides/present-pilot-results-to-executives/Fri, 09 Oct 2026 02:00:41 GMTYour pilot may have run well. Spend the first minute of the meeting on architecture, though, and there may not be a second meeting.https://fdetimes.net/en/analysis/first-fde-team-hiring-metrics-lead/https://fdetimes.net/en/analysis/first-fde-team-hiring-metrics-lead/Fri, 09 Oct 2026 01:59:20 GMTMany people now treat FDEs as a cure-all. Phosai Labs, a services and consulting firm, offers a precise hiring signal and a 20% threshold for spotting when an FDE team has drifted into sales support.https://fdetimes.net/en/tools/braintrust-evals-block-merge-regressions/https://fdetimes.net/en/tools/braintrust-evals-block-merge-regressions/Fri, 09 Oct 2026 01:56:50 GMTAt a customer site, you can only trust an answer to "is the new prompt better?" if a score runs on every pull request. Braintrust is built for exactly that job.https://fdetimes.net/en/guides/package-deployment-playbook-runbook-template-repo/https://fdetimes.net/en/guides/package-deployment-playbook-runbook-template-repo/Fri, 09 Oct 2026 01:00:33 GMTWhat a team learns on a deployment usually leaves with the FDE when the project ends. This guide shows how to keep it in five documents and a template repo.https://fdetimes.net/en/guides/multi-tenant-ai-tenant-isolation-four-layers/https://fdetimes.net/en/guides/multi-tenant-ai-tenant-isolation-four-layers/Fri, 09 Oct 2026 00:58:58 GMTWhen one RAG system serves many customers, a single missing WHERE clause can put one customer's documents into another customer's answer. To prevent that, the boundary has to be built into the database, the vector store and the encryption keys.https://fdetimes.net/en/analysis/fde-to-founder-habits-that-transfer/https://fdetimes.net/en/analysis/fde-to-founder-habits-that-transfer/Fri, 09 Oct 2026 00:57:46 GMTY Combinator tells founders to work like engineers embedded with customers. The reverse is only half true, and the missing half decides whether you build a product company or a services business.https://fdetimes.net/en/tools/n8n-llm-workflows-when-to-switch-to-code/https://fdetimes.net/en/tools/n8n-llm-workflows-when-to-switch-to-code/Fri, 09 Oct 2026 00:56:25 GMTWith drag-and-drop, you can have a customer demo running very quickly. Whether that demo can run in production depends on three things: the limits of the Code node, the scope of the licence and how the system scales.https://fdetimes.net/en/books-courses/harvard-cs50-sql-course-review/https://fdetimes.net/en/books-courses/harvard-cs50-sql-course-review/Fri, 09 Oct 2026 00:54:15 GMTIf you are about to read a client's database, redesign its tables and write safe queries, you can practise all three in a free course taught by David J. Malan and Carter Zenke.https://fdetimes.net/en/books-courses/escaping-the-build-trap-fde-review/https://fdetimes.net/en/books-courses/escaping-the-build-trap-fde-review/Fri, 09 Oct 2026 00:54:09 GMTMelissa Perri wrote it for product managers, but the readers who need her 2018 book most are engineers who sit in a client's office and decide every week what to build next.https://fdetimes.net/en/guides/a2a-vs-mcp-cross-vendor-agents/https://fdetimes.net/en/guides/a2a-vs-mcp-cross-vendor-agents/Thu, 08 Oct 2026 23:57:43 GMTWhen the next link in the chain is an agent from a vendor whose code, memory and tools you cannot see, three things matter: use MCP for your own tools, use A2A to hand work to the other vendor, and expect the hard part to be authentication and tracing.https://fdetimes.net/en/books-courses/andrew-ng-machine-learning-specialization-fde/https://fdetimes.net/en/books-courses/andrew-ng-machine-learning-specialization-fde/Thu, 08 Oct 2026 23:52:02 GMTTen years on, the remake has moved to Python. For developers who want to become FDEs, the course's real value is that it teaches you a model well enough to explain it to a client.https://fdetimes.net/en/guides/hl7-v2-fhir-epic-ai-integration/https://fdetimes.net/en/guides/hl7-v2-fhir-epic-ai-integration/Thu, 08 Oct 2026 22:57:14 GMTIn a hospital, data reaches you by two routes: HL7 v2 pushes events to you, while FHIR lets you ask for state. If you pick the wrong route early on, your agent will either act too late or read the wrong data.https://fdetimes.net/en/books-courses/flawless-consulting-peter-block-fde/https://fdetimes.net/en/books-courses/flawless-consulting-peter-block-fde/Thu, 08 Oct 2026 22:52:40 GMTOn a client site, the hardest part is usually not the pipeline but the silent room after the demo. Peter Block wrote this book to teach you how to handle that room.https://fdetimes.net/en/books-courses/fast-ai-practical-deep-learning-for-coders/https://fdetimes.net/en/books-courses/fast-ai-practical-deep-learning-for-coders/Thu, 08 Oct 2026 22:50:43 GMTJeremy Howard's free course has you running a model on real data in the first lesson. The theory comes later.https://fdetimes.net/en/books-courses/culture-map-erin-meyer-fde-feedback/https://fdetimes.net/en/books-courses/culture-map-erin-meyer-fde-feedback/Thu, 08 Oct 2026 21:52:13 GMTAmerican clients tend to praise first and criticise second, German clients say it straight, and Japanese clients convey a lot through what they leave unsaid. Erin Meyer's book helps FDEs hear all three correctly.https://fdetimes.net/en/books-courses/claude-api-course-fde-skills/https://fdetimes.net/en/books-courses/claude-api-course-fde-skills/Thu, 08 Oct 2026 21:51:18 GMTPut the syllabus next to Anthropic's own FDE job posting and it becomes clear which modules deserve close study, which you can skim, and which parts of the work you will have to learn outside the course.https://fdetimes.net/en/guides/project-sponsor-leaves-mid-deployment/https://fdetimes.net/en/guides/project-sponsor-leaves-mid-deployment/Thu, 08 Oct 2026 20:57:02 GMTThe person who brought the project into the client has just resigned. The code still runs, but nobody is left to approve requests, sign off delivery or defend the project. The FDE is often the first to notice.https://fdetimes.net/en/books-courses/accelerate-dora-four-key-metrics/https://fdetimes.net/en/books-courses/accelerate-dora-four-key-metrics/Thu, 08 Oct 2026 20:52:36 GMTFirst published in 2018, the book by Nicole Forsgren, Jez Humble and Gene Kim gives you hard numbers for the question clients ask most often: how fast and how reliably does our team get changes into production?