Open sourceDataAdvanced
Apache Airflow
Workflow orchestration platform for data pipelines, scheduling, and observability.
Apache Software FoundationAbout 2 hrpythonorchestration
Searchable · Filterable · Traceable
Opportunities and learning resources
Every item keeps its source, verification time, and eligibility notes. Filter by direction, difficulty, format, and deadline to find something you can act on now.
1 filters active
Page 1 of 2 · 26 items
Open sourceBackendAdvanced
CPython
Official Python reference implementation for interpreters, the standard library, and language evolution.
Python Software FoundationAbout 2 hrpythonc
Open sourceDataIntermediate
dbt Core
Analytics-engineering transformation tool for SQL modeling, data tests, and collaborative workflows.
dbt LabsAbout 2 hrsqldata-modeling
Open sourceBackendAdvanced
Deno
Official runtime repository for JavaScript, TypeScript, and WebAssembly.
DenoAbout 2 hrrusttypescript
Open sourceBackendIntermediate
Django
Mature Python web framework with a clear contribution workflow and long-term maintenance practices.
Django Software FoundationAbout 2 hrpythondatabase
Open sourceBackendIntermediate
FastAPI
Modern Python API framework for learning type hints, async APIs, and automatic documentation.
FastAPIAbout 2 hrpythonapi
Open sourceBackendIntermediate
Fastify
High-performance Node.js web framework with contribution guides and an approachable plugin ecosystem.
OpenJS FoundationAbout 2 hrnodejsapi
Open sourceBackendBeginner
Flask
Lightweight Python web framework with an approachable codebase for a first real open-source contribution.
PalletsAbout 2 hrpythonapi
Open sourceAIIntermediate
LangChain
Framework for LLM applications, including tool use, retrieval, and agent engineering.
LangChainAbout 2 hrpythonagents
Open sourceBackendIntermediate
NestJS
Official TypeScript server framework repository for learning modular backend architecture.
NestJSAbout 2 hrtypescriptapi
Open sourceFrontendIntermediate
Next.js
Official repository for the React full-stack framework, with documentation, tests, and contribution issues.
VercelAbout 2 hrreacttypescript
Open sourceBackendAdvanced
Node.js
Official Node.js runtime repository for asynchronous I/O, standard-library, and cross-platform engineering.
OpenJS FoundationAbout 2 hrjavascriptsystems
Open sourceDataIntermediate
NumPy
Foundational Python scientific-computing library for arrays, performance, and native extensions.
NumPyAbout 2 hrpythonnumerical-computing
Open sourceAIIntermediate
OpenAI Python SDK
Official OpenAI Python SDK for typed clients, streaming responses, and API compatibility.
OpenAIAbout 2 hrpythonapi
Open sourceDataIntermediate
pandas
Official Python data-analysis library; documentation, tests, and edge cases provide approachable contributions.
pandasAbout 2 hrpythondataframe
Open sourceAIAdvanced
PyTorch
Official deep-learning framework repository for tensors, autograd, and distributed training.
Linux FoundationAbout 2 hrpythonpytorch
Open sourceFrontendIntermediate
React
Official React repository for learning modern UI internals through docs, tests, and issue discussions.
MetaAbout 2 hrjavascriptreact
Open sourceDataIntermediate
scikit-learn
Classic machine-learning library for understanding production algorithms through examples, docs, and tests.
scikit-learnAbout 2 hrpythonstatistics
Open sourceDataAdvanced
Apache Spark
Large-scale data engine for distributed computing, SQL execution, and performance optimization.
Apache Software FoundationAbout 2 hrdistributed-systemssql
Open sourceBackendAdvanced
Spring Boot
Official Java enterprise framework repository for large-scale testing, builds, and compatibility work.
BroadcomAbout 2 hrjavaspring
Open sourceFrontendIntermediate
Svelte
Official repository for Svelte, including its compiler, runtime, and extensive test suite.
SvelteAbout 2 hrsveltejavascript
Open sourceFrontendBeginner
Tailwind CSS
Official utility-first CSS framework repository, approachable through docs, reproductions, and small fixes.
Tailwind LabsAbout 2 hrcsstooling
Open sourceAIIntermediate
Transformers
Pretrained-model toolkit spanning text, vision, audio, and multimodal tasks.
Hugging FaceAbout 2 hrpythontransformers
Open sourceFrontendAdvanced
TypeScript
Official TypeScript language and compiler repository for studying type systems and compiler engineering.
MicrosoftAbout 2 hrtypescriptcompiler