# Reddit - **Answer**: Reddit builds mostly with Python, Go, SQL, Java. Its stack also includes Kubernetes, PyTorch, TensorFlow, Google BigQuery. Python is named in 107 of the 224 job postings Reddit published in the last 12 months (48%). Counted by Alion from the job postings of Reddit, updated Nov 11, 2026. - **Window days**: 365 - **Postings analysed**: 224 - **Open postings**: 107 - **Technologies in use**: 179 - **Modernity score**: 81 - **Ai adoption**: yes - **License**: CC BY-SA 4.0 ## Company - **Id**: 16 - **Name**: Reddit - **Domain**: reddit.com - **Url**: ## Technologies - **Python** — Layer: languages; Postings: 107; Share: 0.4777; Required: 101; Open postings: 47; First seen: 2025-01-06 - **Machine Learning** — Layer: practices; Postings: 92; Share: 0.4107; Required: 85; Open postings: 43; First seen: 2025-01-07 - **Go** — Layer: languages; Postings: 51; Share: 0.2277; Required: 50; Open postings: 26; First seen: 2025-01-06 - **LLM** — Layer: ai; Postings: 44; Share: 0.1964; Required: 40; Open postings: 25; First seen: 2025-08-14 - **SQL** — Layer: languages; Postings: 44; Share: 0.1964; Required: 36; Open postings: 29; First seen: 2025-02-04 - **Kubernetes** — Layer: cloud; Postings: 43; Share: 0.192; Required: 30; Open postings: 22; First seen: 2025-01-06 - **GraphQL** — Layer: tools; Postings: 35; Share: 0.1563; Required: 32; Open postings: 14; First seen: 2025-10-14 - **Recommender Systems** — Layer: practices; Postings: 35; Share: 0.1563; Required: 27; Open postings: 15; First seen: 2025-08-14 - **PyTorch** — Layer: frameworks; Postings: 34; Share: 0.1518; Required: 28; Open postings: 13; First seen: 2025-02-04 - **AI Agents** — Layer: practices; Postings: 32; Share: 0.1429; Required: 28; Open postings: 12; First seen: 2025-08-14 - **gRPC** — Layer: tools; Postings: 30; Share: 0.1339; Required: 29; Open postings: 14; First seen: 2026-05-21 - **TensorFlow** — Layer: frameworks; Postings: 29; Share: 0.1295; Required: 26; Open postings: 11; First seen: 2025-02-04 - **Google BigQuery** — Layer: data; Postings: 28; Share: 0.125; Required: 23; Open postings: 15; First seen: 2025-01-06 - **Java** — Layer: languages; Postings: 27; Share: 0.1205; Required: 26; Open postings: 13; First seen: 2025-01-06 - **C++** — Layer: languages; Postings: 25; Share: 0.1116; Required: 24; Open postings: 11; First seen: 2025-01-06 - **JavaScript** — Layer: languages; Postings: 25; Share: 0.1116; Required: 21; Open postings: 11; First seen: 2026-03-25 - **A/B Testing** — Layer: practices; Postings: 24; Share: 0.1071; Required: 23; Open postings: 11; First seen: 2025-02-04 - **Rest API** — Layer: tools; Postings: 23; Share: 0.1027; Required: 22; Open postings: 14; First seen: 2026-05-21 - **TypeScript** — Layer: languages; Postings: 23; Share: 0.1027; Required: 22; Open postings: 12; First seen: 2026-03-25 - **GCP** — Layer: cloud; Postings: 21; Share: 0.0938; Required: 19; Open postings: 11; First seen: 2025-10-14 - **Embeddings** — Layer: practices; Postings: 21; Share: 0.0938; Required: 18; Open postings: 9; First seen: 2025-10-27 - **Rust** — Layer: languages; Postings: 19; Share: 0.0848; Required: 19; Open postings: 9; First seen: 2026-04-27 - **AWS** — Layer: cloud; Postings: 19; Share: 0.0848; Required: 18; Open postings: 7; First seen: 2025-10-14 - **Platform Engineering** — Layer: practices; Postings: 19; Share: 0.0848; Required: 18; Open postings: 9; First seen: 2026-03-26 - **React.js** — Layer: frameworks; Postings: 19; Share: 0.0848; Required: 18; Open postings: 9; First seen: 2026-03-25 - **CI/CD** — Layer: practices; Postings: 18; Share: 0.0804; Required: 17; Open postings: 7; First seen: 2025-10-14 - **Redis** — Layer: data; Postings: 18; Share: 0.0804; Required: 12; Open postings: 14; First seen: 2025-01-06 - **Ray** — Layer: frameworks; Postings: 17; Share: 0.0759; Required: 13; Open postings: 8; First seen: 2025-08-14 - **Apache Kafka** — Layer: cloud; Postings: 17; Share: 0.0759; Required: 10; Open postings: 9; First seen: 2025-01-06 - **Spark** — Layer: cloud; Postings: 16; Share: 0.0714; Required: 13; Open postings: 6; First seen: 2025-01-06 - **Kotlin** — Layer: languages; Postings: 15; Share: 0.067; Required: 15; Open postings: 7; First seen: 2026-03-27 - **Ruby** — Layer: languages; Postings: 12; Share: 0.0536; Required: 12; Open postings: 4; First seen: 2026-06-23 - **Flink** — Layer: frameworks; Postings: 11; Share: 0.0491; Required: 10; Open postings: 2; First seen: 2026-04-22 - **Knowledge Graph** — Layer: practices; Postings: 10; Share: 0.0446; Required: 10; Open postings: 6; First seen: 2026-04-24 - **Firebase** — Layer: cloud; Postings: 9; Share: 0.0402; Required: 9; Open postings: 5; First seen: 2026-03-27 - **ETL/ELT** — Layer: practices; Postings: 9; Share: 0.0402; Required: 8; Open postings: 4; First seen: 2025-04-24 - **Swift** — Layer: languages; Postings: 9; Share: 0.0402; Required: 8; Open postings: 4; First seen: 2026-05-04 - **Jetpack Compose** — Layer: frameworks; Postings: 9; Share: 0.0402; Required: 7; Open postings: 3; First seen: 2026-04-20 - **NLP** — Layer: practices; Postings: 9; Share: 0.0402; Required: 7; Open postings: 5; First seen: 2026-02-13 - **Fine-tuning** — Layer: practices; Postings: 9; Share: 0.0402; Required: 5; Open postings: 6; First seen: 2025-08-14 - **Human-in-the-Loop** — Layer: practices; Postings: 8; Share: 0.0357; Required: 8; Open postings: 5; First seen: 2026-06-03 - **Cursor** — Layer: tools; Postings: 8; Share: 0.0357; Required: 7; Open postings: 4; First seen: 2026-03-10 - **PostgreSQL** — Layer: data; Postings: 8; Share: 0.0357; Required: 6; Open postings: 7; First seen: 2025-01-06 - **RAG** — Layer: practices; Postings: 8; Share: 0.0357; Required: 5; Open postings: 5; First seen: 2025-08-14 - **Transformers** — Layer: frameworks; Postings: 8; Share: 0.0357; Required: 5; Open postings: 5; First seen: 2025-08-14 - **Multimodal AI** — Layer: practices; Postings: 8; Share: 0.0357; Required: 4; Open postings: 6; First seen: 2025-08-14 - **Scala** — Layer: languages; Postings: 7; Share: 0.0313; Required: 6; Open postings: 2; First seen: 2025-01-06 - **Grafana** — Layer: cloud; Postings: 7; Share: 0.0313; Required: 3; Open postings: 5; First seen: 2026-05-08 - **AVFoundation** — Layer: frameworks; Postings: 6; Share: 0.0268; Required: 6; Open postings: 2; First seen: 2026-05-12 - **Anomaly Detection** — Layer: practices; Postings: 6; Share: 0.0268; Required: 6; Open postings: 3; First seen: 2025-02-04 - … 129 more in the JSON form ## Changes ### First appeared - **Prompt Engineering** — First seen: 2026-10-18 - **Media3** — First seen: 2026-10-07 - **Microsoft Excel** — First seen: 2026-10-02 - **Amazon CloudWatch** — First seen: 2026-10-01 - **DynamoDB** — First seen: 2026-10-01 - **Airflow** — First seen: 2026-09-18 - **Amazon S3** — First seen: 2026-09-15 - **Apache Iceberg** — First seen: 2026-09-15 ### Rising - **Rest API** — Share from: 4; Share to: 19 - **gRPC** — Share from: 10; Share to: 20 - **Redis** — Share from: 4; Share to: 11 - **Java** — Share from: 9; Share to: 14 - **Firebase** — Share from: 1; Share to: 6 - **Next.js** — Share from: 0; Share to: 5 - **Rust** — Share from: 7; Share to: 11 - **React.js** — Share from: 7; Share to: 11 ### Falling - **Machine Learning** — Share from: 50; Share to: 28 - **Python** — Share from: 56; Share to: 37 - **A/B Testing** — Share from: 16; Share to: 5 - **Recommender Systems** — Share from: 20; Share to: 12 - **AI Agents** — Share from: 17; Share to: 9 - **Kubernetes** — Share from: 21; Share to: 14 - **Spark** — Share from: 9; Share to: 3 - **Platform Engineering** — Share from: 10; Share to: 5 ### Not seen 180d - **MLFlow** — Last seen: 2026-05-05 - **Terraform** — Last seen: 2026-04-01 - **Milvus** — Last seen: 2026-04-27 - **Vespa** — Last seen: 2026-04-27 - **LLMOps** — Last seen: 2026-04-01 - **Neo4j** — Last seen: 2026-03-18 - **Weights & Biases** — Last seen: 2026-03-18 ## Similar stacks - [Airbnb](https://alion.io/company/airbnb/technologies) — Shared technologies: 112 - [eBay](https://alion.io/company/ebay/technologies) — Shared technologies: 125 - [Coupang](https://alion.io/company/coupang/technologies) — Shared technologies: 145 - [Grab](https://alion.io/company/grab/technologies) — Shared technologies: 144 - [TikTok](https://alion.io/company/tiktok/technologies) — Shared technologies: 144 - [Mercari](https://alion.io/company/mercari/technologies) — Shared technologies: 109 - [JioStar](https://alion.io/company/jio-star/technologies) — Shared technologies: 114 - [Uber](https://alion.io/company/uber/technologies) — Shared technologies: 137 --- [Page](https://alion.io/company/reddit/technologies) · [JSON](https://alion.io/company/reddit/technologies.json) Source: Alion (alion.io), 2026-11-11. 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