# Sierra - **Answer**: Sierra builds mostly with TypeScript, Go, SQL, Python. Its stack also includes OpenAI, AWS, OpenAI Agents SDK, React.js. OpenAI is named in 259 of the 263 job postings Sierra published in the last 12 months (98%). Counted by Alion from the job postings of Sierra, updated Nov 11, 2026. - **Window days**: 365 - **Postings analysed**: 263 - **Open postings**: 158 - **Technologies in use**: 97 - **Modernity score**: 83 - **Ai adoption**: yes - **Own products**: AI Agents, Voice Agents - **License**: CC BY-SA 4.0 ## Company - **Id**: 37541 - **Name**: Sierra - **Domain**: sierra.ai - **Url**: ## Technologies - **OpenAI** — Layer: cloud; Postings: 259; Share: 0.9848; Required: 259; Open postings: 158; First seen: 2024-01-28 - **TypeScript** — Layer: languages; Postings: 61; Share: 0.2319; Required: 61; Open postings: 38; First seen: 2025-02-13 - **LLM** — Layer: ai; Postings: 55; Share: 0.2091; Required: 55; Open postings: 31; First seen: 2025-02-13 - **Prompt Engineering** — Layer: practices; Postings: 40; Share: 0.1521; Required: 40; Open postings: 22; First seen: 2025-02-13 - **RAG** — Layer: practices; Postings: 39; Share: 0.1483; Required: 39; Open postings: 21; First seen: 2025-02-13 - **AWS** — Layer: cloud; Postings: 15; Share: 0.057; Required: 15; Open postings: 7; First seen: 2025-10-21 - **IAM** — Layer: practices; Postings: 11; Share: 0.0418; Required: 11; Open postings: 4; First seen: 2025-10-21 - **Platform Engineering** — Layer: practices; Postings: 11; Share: 0.0418; Required: 11; Open postings: 4; First seen: 2026-04-11 - **CI/CD** — Layer: practices; Postings: 11; Share: 0.0418; Required: 10; Open postings: 6; First seen: 2025-04-30 - **Terraform** — Layer: tools; Postings: 10; Share: 0.038; Required: 10; Open postings: 6; First seen: 2025-10-21 - **Cursor** — Layer: tools; Postings: 8; Share: 0.0304; Required: 8; Open postings: 5; First seen: 2025-05-20 - **Figma** — Layer: cloud; Postings: 8; Share: 0.0304; Required: 8; Open postings: 4; First seen: 2025-06-04 - **GCP** — Layer: cloud; Postings: 8; Share: 0.0304; Required: 8; Open postings: 4; First seen: 2026-02-12 - **Go** — Layer: languages; Postings: 8; Share: 0.0304; Required: 8; Open postings: 7; First seen: 2025-06-04 - **SQL** — Layer: languages; Postings: 8; Share: 0.0304; Required: 7; Open postings: 6; First seen: 2026-01-29 - **Claude Code** — Layer: tools; Postings: 7; Share: 0.0266; Required: 7; Open postings: 4; First seen: 2026-06-05 - **EU AI Act** — Layer: practices; Postings: 7; Share: 0.0266; Required: 7; Open postings: 3; First seen: 2026-02-12 - **Python** — Layer: languages; Postings: 7; Share: 0.0266; Required: 7; Open postings: 5; First seen: 2026-01-29 - **Incident Management** — Layer: practices; Postings: 7; Share: 0.0266; Required: 5; Open postings: 3; First seen: 2025-10-21 - **Azure** — Layer: cloud; Postings: 6; Share: 0.0228; Required: 6; Open postings: 4; First seen: 2026-02-12 - **Datadog** — Layer: cloud; Postings: 6; Share: 0.0228; Required: 6; Open postings: 2; First seen: 2025-10-21 - **Grafana** — Layer: cloud; Postings: 6; Share: 0.0228; Required: 6; Open postings: 2; First seen: 2025-10-21 - **Machine Learning** — Layer: practices; Postings: 6; Share: 0.0228; Required: 6; Open postings: 4; First seen: 2026-03-27 - **Multimodal AI** — Layer: practices; Postings: 6; Share: 0.0228; Required: 6; Open postings: 4; First seen: 2026-07-21 - **Prometheus** — Layer: tools; Postings: 6; Share: 0.0228; Required: 6; Open postings: 2; First seen: 2025-10-21 - **DNS** — Layer: practices; Postings: 5; Share: 0.019; Required: 5; Open postings: 1; First seen: 2026-04-21 - **GraphQL** — Layer: tools; Postings: 5; Share: 0.019; Required: 5; Open postings: 1; First seen: 2025-06-04 - **NIST AI RMF** — Layer: practices; Postings: 5; Share: 0.019; Required: 5; Open postings: 2; First seen: 2026-03-13 - **OpenAI Agents SDK** — Layer: frameworks; Postings: 5; Share: 0.019; Required: 5; Open postings: 4; First seen: 2025-05-20 - **JavaScript** — Layer: languages; Postings: 5; Share: 0.019; Required: 4; Open postings: 2; First seen: 2025-06-04 - **A/B Testing** — Layer: practices; Postings: 4; Share: 0.0152; Required: 4; Open postings: 2; First seen: 2026-06-05 - **Claude** — Layer: ai; Postings: 4; Share: 0.0152; Required: 4; Open postings: 2; First seen: 2025-05-20 - **ISO 42001** — Layer: practices; Postings: 4; Share: 0.0152; Required: 4; Open postings: 1; First seen: 2026-02-12 - **Kubernetes** — Layer: cloud; Postings: 4; Share: 0.0152; Required: 4; Open postings: 3; First seen: 2026-02-12 - **Model Context Protocol** — Layer: tools; Postings: 4; Share: 0.0152; Required: 4; Open postings: 2; First seen: 2025-05-20 - **OpenAI Codex** — Layer: tools; Postings: 4; Share: 0.0152; Required: 4; Open postings: 3; First seen: 2025-05-20 - **React.js** — Layer: frameworks; Postings: 4; Share: 0.0152; Required: 4; Open postings: 2; First seen: 2025-06-04 - **Okta** — Layer: cloud; Postings: 3; Share: 0.0114; Required: 3; Open postings: 3; First seen: 2026-08-21 - **Post-training** — Layer: practices; Postings: 3; Share: 0.0114; Required: 3; Open postings: 3; First seen: 2026-10-05 - **ChatGPT** — Layer: ai; Postings: 2; Share: 0.0076; Required: 2; Open postings: 2; First seen: 2026-06-05 - **DLP** — Layer: cloud; Postings: 2; Share: 0.0076; Required: 2; Open postings: 1; First seen: 2026-05-01 - **ETL/ELT** — Layer: practices; Postings: 2; Share: 0.0076; Required: 2; Open postings: 2; First seen: 2026-01-29 - **Function Calling** — Layer: practices; Postings: 2; Share: 0.0076; Required: 2; Open postings: 2; First seen: 2026-01-07 - **Human-in-the-Loop** — Layer: practices; Postings: 2; Share: 0.0076; Required: 2; Open postings: 0; First seen: 2026-04-11 - **Recommender Systems** — Layer: practices; Postings: 2; Share: 0.0076; Required: 2; Open postings: 1; First seen: 2026-03-27 - **Reinforcement Learning** — Layer: practices; Postings: 2; Share: 0.0076; Required: 2; Open postings: 2; First seen: 2026-10-05 - **SFT** — Layer: practices; Postings: 2; Share: 0.0076; Required: 2; Open postings: 2; First seen: 2026-10-05 - **Speech Recognition** — Layer: practices; Postings: 2; Share: 0.0076; Required: 2; Open postings: 0; First seen: 2026-04-15 - **Text-to-Speech** — Layer: practices; Postings: 2; Share: 0.0076; Required: 2; Open postings: 0; First seen: 2026-04-15 - **Twilio** — Layer: cloud; Postings: 2; Share: 0.0076; Required: 2; Open postings: 2; First seen: 2026-09-09 - … 47 more in the JSON form ## Changes ### First appeared - **Reinforcement Learning** — First seen: 2026-10-05 - **SFT** — First seen: 2026-10-05 - **Post-training** — First seen: 2026-10-05 - **Twilio** — First seen: 2026-09-09 - **Okta** — First seen: 2026-08-21 - **Multimodal AI** — First seen: 2026-07-21 - **Snowflake** — First seen: 2026-06-12 - **A/B Testing** — First seen: 2026-06-05 ### Rising - **Okta** — Share from: 0; Share to: 3 - **Post-training** — Share from: 0; Share to: 3 ### Falling - **AWS** — Share from: 9; Share to: 3 - **IAM** — Share from: 7; Share to: 1 - **Figma** — Share from: 7; Share to: 1 - **CI/CD** — Share from: 7; Share to: 2 - **Go** — Share from: 6; Share to: 1 - **Datadog** — Share from: 5; Share to: 0 - **Grafana** — Share from: 5; Share to: 0 - **Prometheus** — Share from: 5; Share to: 0 ### Not seen 180d - **Text-to-Speech** — Last seen: 2026-05-05 ## Similar stacks - [Sierra](https://alion.io/company/sierra) — Shared technologies: 71 - [Samsara](https://alion.io/company/samsara/technologies) — Shared technologies: 76 - [Perplexity AI](https://alion.io/company/perplexity/technologies) — Shared technologies: 69 - [Toast](https://alion.io/company/toasttab/technologies) — Shared technologies: 71 - [Stripe](https://alion.io/company/stripe/technologies) — Shared technologies: 80 - [Nordstrom](https://alion.io/company/nordstrom/technologies) — Shared technologies: 70 - [Appier](https://alion.io/company/appier-2/technologies) — Shared technologies: 71 - [RingCentral](https://alion.io/company/ringcentral/technologies) — Shared technologies: 70 --- [Page](https://alion.io/company/sierra-ai/technologies) · [JSON](https://alion.io/company/sierra-ai/technologies.json) Source: Alion (alion.io), 2026-11-11. 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