# Klaviyo - **Answer**: Klaviyo builds mostly with Python, SQL, JavaScript, TypeScript. Its stack also includes AWS, Django, Kubernetes, Redis. Python is named in 68 of the 241 job postings Klaviyo published in the last 12 months (28%). Counted by Alion from the job postings of Klaviyo, updated Nov 14, 2026. - **Window days**: 365 - **Postings analysed**: 241 - **Open postings**: 128 - **Technologies in use**: 163 - **Modernity score**: 83 - **Ai adoption**: yes - **License**: CC BY-SA 4.0 ## Company - **Id**: 6845 - **Name**: Klaviyo - **Domain**: klaviyo.com - **Url**: ## Technologies - **Human-in-the-Loop** — Layer: practices; Postings: 241; Share: 1; Required: 134; Open postings: 128; First seen: 2025-10-16 - **Python** — Layer: languages; Postings: 68; Share: 0.2822; Required: 53; Open postings: 36; First seen: 2025-10-20 - **AWS** — Layer: cloud; Postings: 47; Share: 0.195; Required: 27; Open postings: 24; First seen: 2025-10-20 - **LLM** — Layer: ai; Postings: 38; Share: 0.1577; Required: 25; Open postings: 21; First seen: 2025-10-20 - **AI Agents** — Layer: practices; Postings: 35; Share: 0.1452; Required: 32; Open postings: 23; First seen: 2025-10-20 - **SQL** — Layer: languages; Postings: 31; Share: 0.1286; Required: 28; Open postings: 21; First seen: 2026-01-08 - **Terraform** — Layer: tools; Postings: 31; Share: 0.1286; Required: 9; Open postings: 14; First seen: 2026-01-08 - **CI/CD** — Layer: practices; Postings: 28; Share: 0.1162; Required: 24; Open postings: 15; First seen: 2025-10-20 - **Django** — Layer: frameworks; Postings: 26; Share: 0.1079; Required: 6; Open postings: 11; First seen: 2025-10-20 - **Kubernetes** — Layer: cloud; Postings: 25; Share: 0.1037; Required: 16; Open postings: 12; First seen: 2025-10-20 - **Redis** — Layer: data; Postings: 24; Share: 0.0996; Required: 5; Open postings: 10; First seen: 2025-10-20 - **Claude** — Layer: ai; Postings: 22; Share: 0.0913; Required: 17; Open postings: 8; First seen: 2026-03-20 - **Apache Kafka** — Layer: cloud; Postings: 22; Share: 0.0913; Required: 11; Open postings: 7; First seen: 2025-10-20 - **MySQL** — Layer: data; Postings: 22; Share: 0.0913; Required: 1; Open postings: 9; First seen: 2026-01-22 - **Tableau** — Layer: cloud; Postings: 18; Share: 0.0747; Required: 16; Open postings: 12; First seen: 2026-04-16 - **RabbitMQ** — Layer: cloud; Postings: 16; Share: 0.0664; Required: 6; Open postings: 6; First seen: 2025-10-20 - **Machine Learning** — Layer: practices; Postings: 15; Share: 0.0622; Required: 9; Open postings: 8; First seen: 2025-10-20 - **Snowflake** — Layer: data; Postings: 14; Share: 0.0581; Required: 13; Open postings: 7; First seen: 2026-04-03 - **Prompt Engineering** — Layer: practices; Postings: 13; Share: 0.0539; Required: 7; Open postings: 5; First seen: 2026-04-16 - **JavaScript** — Layer: languages; Postings: 13; Share: 0.0539; Required: 2; Open postings: 7; First seen: 2026-01-22 - **Amazon EC2** — Layer: cloud; Postings: 13; Share: 0.0539; Required: 0; Open postings: 5; First seen: 2026-01-22 - **LLM Guardrails** — Layer: practices; Postings: 12; Share: 0.0498; Required: 9; Open postings: 7; First seen: 2026-05-04 - **Celery** — Layer: frameworks; Postings: 12; Share: 0.0498; Required: 4; Open postings: 5; First seen: 2025-10-20 - **FastAPI** — Layer: frameworks; Postings: 12; Share: 0.0498; Required: 4; Open postings: 4; First seen: 2025-10-20 - **TypeScript** — Layer: languages; Postings: 12; Share: 0.0498; Required: 3; Open postings: 6; First seen: 2026-01-22 - **Go** — Layer: languages; Postings: 11; Share: 0.0456; Required: 9; Open postings: 4; First seen: 2026-04-29 - **Agentic Workflows** — Layer: practices; Postings: 10; Share: 0.0415; Required: 10; Open postings: 5; First seen: 2026-06-05 - **GitHub** — Layer: cloud; Postings: 10; Share: 0.0415; Required: 9; Open postings: 2; First seen: 2026-03-10 - **React.js** — Layer: frameworks; Postings: 10; Share: 0.0415; Required: 5; Open postings: 6; First seen: 2026-01-22 - **ChatGPT** — Layer: ai; Postings: 9; Share: 0.0373; Required: 8; Open postings: 3; First seen: 2026-08-05 - **RAG** — Layer: practices; Postings: 9; Share: 0.0373; Required: 7; Open postings: 2; First seen: 2025-10-20 - **Apache Pulsar** — Layer: cloud; Postings: 9; Share: 0.0373; Required: 4; Open postings: 1; First seen: 2026-06-09 - **Cursor** — Layer: tools; Postings: 9; Share: 0.0373; Required: 3; Open postings: 4; First seen: 2026-03-20 - **Model Context Protocol** — Layer: tools; Postings: 9; Share: 0.0373; Required: 2; Open postings: 7; First seen: 2026-09-11 - **Amazon Aurora** — Layer: data; Postings: 9; Share: 0.0373; Required: 0; Open postings: 4; First seen: 2026-01-22 - **Memcached** — Layer: data; Postings: 9; Share: 0.0373; Required: 0; Open postings: 2; First seen: 2026-06-09 - **SLI/SLO/SLA** — Layer: practices; Postings: 7; Share: 0.029; Required: 6; Open postings: 5; First seen: 2025-12-23 - **dbt** — Layer: tools; Postings: 7; Share: 0.029; Required: 6; Open postings: 3; First seen: 2026-04-03 - **OpenAI** — Layer: cloud; Postings: 7; Share: 0.029; Required: 5; Open postings: 4; First seen: 2026-04-16 - **Claude Code** — Layer: tools; Postings: 7; Share: 0.029; Required: 4; Open postings: 3; First seen: 2026-05-04 - **IAM** — Layer: practices; Postings: 7; Share: 0.029; Required: 4; Open postings: 4; First seen: 2026-04-21 - **Fine-tuning** — Layer: practices; Postings: 7; Share: 0.029; Required: 3; Open postings: 3; First seen: 2025-10-20 - **Rest API** — Layer: tools; Postings: 7; Share: 0.029; Required: 2; Open postings: 4; First seen: 2026-06-15 - **A/B Testing** — Layer: practices; Postings: 6; Share: 0.0249; Required: 5; Open postings: 4; First seen: 2026-04-10 - **LangChain** — Layer: frameworks; Postings: 6; Share: 0.0249; Required: 4; Open postings: 1; First seen: 2026-04-16 - **NIST AI RMF** — Layer: practices; Postings: 6; Share: 0.0249; Required: 4; Open postings: 6; First seen: 2026-09-22 - **Copilot** — Layer: tools; Postings: 6; Share: 0.0249; Required: 2; Open postings: 2; First seen: 2025-12-23 - **Apex** — Layer: languages; Postings: 5; Share: 0.0207; Required: 5; Open postings: 1; First seen: 2026-04-03 - **FinOps** — Layer: practices; Postings: 5; Share: 0.0207; Required: 5; Open postings: 2; First seen: 2026-01-08 - **SIEM** — Layer: cloud; Postings: 5; Share: 0.0207; Required: 5; Open postings: 1; First seen: 2026-03-10 - … 113 more in the JSON form ## Changes ### First appeared - **Streamlit** — First seen: 2026-10-08 - **Figma** — First seen: 2026-09-30 - **NIST AI RMF** — First seen: 2026-09-22 - **ISO 42001** — First seen: 2026-09-22 - **Agentforce** — First seen: 2026-09-18 - **CrewAI** — First seen: 2026-09-18 - **LlamaIndex** — First seen: 2026-09-18 - **ClickHouse** — First seen: 2026-09-17 ### Rising - **SQL** — Share from: 6; Share to: 15 - **CI/CD** — Share from: 6; Share to: 14 - **Tableau** — Share from: 3; Share to: 10 - **Model Context Protocol** — Share from: 0; Share to: 6 - **Fine-tuning** — Share from: 0; Share to: 4 - **NIST AI RMF** — Share from: 0; Share to: 4 - **RAG** — Share from: 1; Share to: 4 - **Rest API** — Share from: 1; Share to: 4 ### Falling - **Terraform** — Share from: 19; Share to: 9 - **Claude** — Share from: 15; Share to: 5 - **MySQL** — Share from: 16; Share to: 6 - **Redis** — Share from: 16; Share to: 7 - **Prompt Engineering** — Share from: 10; Share to: 1 - **Apache Pulsar** — Share from: 10; Share to: 1 - **Memcached** — Share from: 10; Share to: 1 - **RabbitMQ** — Share from: 12; Share to: 4 ### Not seen 180d - **Cartographer** — Last seen: 2026-05-04 - **Multi-Agent Systems** — Last seen: 2026-05-04 - **Erlang** — Last seen: 2026-04-16 - **Matplotlib** — Last seen: 2026-04-16 - **NumPy** — Last seen: 2026-04-16 - **OpenAI SDK** — Last seen: 2026-04-16 - **Plotly** — Last seen: 2026-04-16 - **Scikit-learn** — Last seen: 2026-04-16 ## Similar stacks - [Twilio](https://alion.io/company/twilio/technologies) — Shared technologies: 124 - [Anaplan](https://alion.io/company/anaplan/technologies) — Shared technologies: 119 - [Fractal](https://alion.io/company/fractal-analytics/technologies) — Shared technologies: 134 - [Intuit](https://alion.io/company/intuit/technologies) — Shared technologies: 135 - [Snowflake](https://alion.io/company/snowflake/technologies) — Shared technologies: 134 - [T-Mobile](https://alion.io/company/t-mobile-com/technologies) — Shared technologies: 116 - [Humana](https://alion.io/company/humana/technologies) — Shared technologies: 131 - [Tiger Analytics](https://alion.io/company/tigeranalytics/technologies) — Shared technologies: 121 --- [Page](https://alion.io/company/klaviyo/technologies) · [JSON](https://alion.io/company/klaviyo/technologies.json) Source: Alion (alion.io), 2026-11-15. 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