
CS50x: Computer Science
Master memory pointers and data structures in C before building full-stack apps in Python and SQL.
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Master memory pointers and data structures in C before building full-stack apps in Python and SQL.

The #1 ethical hacking platform on the internet. Exploit and patch real vulnerable web servers.

Learn intrinsic equity valuation, cost of capital, and DCF modeling from Wall Street's Dean of Valuation.

Taught by OpenAI co-founder Andrej Karpathy. Code backpropagation, BPE tokenizers, and GPT from scratch.
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Recruiters hire for shipped work, not video completion. Place the DCF model, penetration test log, or codebase you built inside your Projects & Research section so ATS parsers weight the technical nouns correctly.
• Built dynamic Discounted Cash Flow (DCF) models, WACC calculations, and intrinsic equity valuations applying NYU Stern financial frameworks.
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Your Education block is strictly for formal degrees. Listing a free online course there makes hiring managers think you are misrepresenting enrollment and flags background verification checks.
Penetration testing, OWASP exploitation, network defense, and x86 reverse engineering.
The undisputed gold standard for web penetration testing. Exploit live vulnerable servers covering SQL Injection, XSS, SSRF, JWT, OAuth, and HTTP Request Smuggling.
Start Free Course ↗"• Identified and remediated OWASP Top 10 vulnerabilities including SQLi, XSS, SSRF, and broken authentication across live web architectures."
Official offensive security training from Cisco. Covers reconnaissance, network scanning, enumeration, social engineering, wireless exploitation, and post-exploitation reporting.
Start Free Course ↗"• Executed end-to-end network vulnerability assessments, packet analysis, and authorized penetration tests utilizing Nmap, Wireshark, and Metasploit."
Where senior exploit developers and malware analysts train. Teaches low-level x86-64 assembly, stack frames, Ghidra/IDA disassembly, firmware security, and kernel internals.
Start Free Course ↗"• Reverse-engineered compiled x86-64 binaries and analyzed stack memory corruption vulnerabilities using Ghidra and low-level debugging tools."
Authored by the SANS Institute. Builds the core defensive triad required for SOC analysts and blue-team engineers: Linux CLI internals, TCP/IP packet crafting, and PowerShell defense.
Start Free Course ↗"• Hardened Linux and Windows server environments, analyzed TCP/IP packet anomalies, and automated incident triage workflows using Bash and PowerShell."
Memory management, full-stack TypeScript, Kubernetes, and distributed consensus.
The gold standard computer science foundation. Master pointers, memory allocation, and data structures in C before moving up to Python, SQL, and web engineering.
Start Free Course ↗"• Engineered full-stack applications and implemented low-level data structures (hash tables, tries) in C and Python via Harvard CS50x."
Drops you straight into production React, TypeScript, Node.js, GraphQL, PostgreSQL, Docker, and automated CI/CD pipelines—backed by official university credits.
Start Free Course ↗"• Architected single-page applications (SPAs) using React, TypeScript, Node.js, and GraphQL with automated Docker and CI/CD workflows."
The legendary MIT graduate course that separates senior backend engineers from juniors. Implement MapReduce, Raft consensus, and sharded fault-tolerant storage in Go.
Start Free Course ↗"• Engineered a fault-tolerant distributed key-value store and Raft consensus protocol in Go with automated leader election and state replication."
Authored by the Cloud Native Computing Foundation (CNCF). Essential for backend, DevOps, and SRE candidates who need to pass enterprise container orchestration screens.
Start Free Course ↗"• Orchestrated containerized microservices, managed cluster deployments, and configured fault-tolerant scaling policies using Kubernetes and Docker."
Official engineering curriculum from AWS. Covers IAM security policies, VPC networking, EC2 compute, S3 storage, and serverless Lambda execution.
Start Free Course ↗"• Designed fault-tolerant cloud infrastructure utilizing AWS core services including EC2, S3, Serverless Lambda, VPC, and IAM security policies."
PyTorch neural networks, LLM fine-tuning, Stanford ML math, and SQL analytics.
Taught by OpenAI co-founder Andrej Karpathy. Build backpropagation, Byte-Pair Encoding tokenizers, BatchNorm, and a full GPT Transformer from a blank Python file.
Start Free Course ↗"• Implemented a custom autograd engine, Byte-Pair Encoding tokenizer, and GPT decoder-only Transformer architecture from scratch in PyTorch."
Stanford's flagship graduate machine learning course. Covers generalized linear models, SVMs, EM algorithms, PCA, independent component analysis, and reinforcement learning.
Start Free Course ↗"• Developed statistical machine learning algorithms including SVMs, Expectation-Maximization, and dimensionality reduction (PCA) under Stanford CS229 frameworks."
Learn directly from the maintainers of Hugging Face how to tokenize datasets, fine-tune open-weight LLMs with LoRA/PEFT, and deploy RAG inference pipelines.
Start Free Course ↗"• Fine-tuned pre-trained Transformer models with LoRA and built custom tokenization pipelines for LLM workloads using the Hugging Face ecosystem."
Zero video bloat. Write real SQL window functions, Pandas data wrangling, and Scikit-Learn/XGBoost models inside live interactive Jupyter notebooks.
Start Free Course ↗"• Executed exploratory data analysis (EDA), complex SQL window aggregations, and predictive modeling pipelines using Python, Pandas, and SQL."
Roadmaps, unit economics, and executive strategy.
Taught by the partners behind Stripe, Airbnb, and DoorDash. Measure cohort retention, run unbiased user interviews, prioritize product roadmaps, and drive unit economics.
Start Free Course ↗"• Defined product roadmap prioritization, cohort retention metrics, and Go-To-Market (GTM) execution frameworks utilizing Y Combinator product methodologies."
The strategic framework taught to MIT Sloan MBAs. Covers industry structure analysis, game theory in pricing, value-chain moats, and corporate resource allocation.
Start Free Course ↗"• Conducted competitive moat analysis, value-chain optimization, and strategic market sizing using MIT Sloan quantitative frameworks."
Master Agile sprint planning, backlog grooming, and velocity tracking directly from Atlassian to immediately satisfy enterprise PM operational filters.
Start Free Course ↗"• Led cross-functional Agile sprints, backlog prioritization, and release velocity tracking across engineering and design teams using Jira."
Built by Mind the Product. Focuses on Product-Led Growth (PLG), feature adoption analytics, user onboarding friction removal, and quantitative product discovery.
Start Free Course ↗"• Designed Product-Led Growth (PLG) onboarding flows and feature adoption telemetry to increase activation rates and reduce time-to-value."
DCF modeling, capital markets, and 3-statement mechanics.
Aswath Damodaran is known on Wall Street as the 'Dean of Valuation.' Access his entire NYU Stern MBA valuation curriculum, spreadsheets, and DCF models for free.
Start Free Course ↗"• Built dynamic Discounted Cash Flow (DCF) models, WACC calculations, and intrinsic equity valuations applying NYU Stern financial frameworks."
Taught by Nobel Prize winner Robert Shiller. Deep dive into capital markets, CAPM portfolio theory, behavioral finance, risk management, and options pricing.
Start Free Course ↗"• Analyzed capital market inefficiencies, portfolio risk pricing (CAPM), and derivative instruments under Yale ECON 252 frameworks."
Master linking the Income Statement, Balance Sheet, and Cash Flow Statement dynamically in Excel for Investment Banking, FP&A, and Private Equity screens.
Start Free Course ↗"• Constructed integrated 3-statement financial models, cash flow forecasts, and EBITDA variance analyses to support FP&A decision-making."
Taught by MIT Prof. Andrew Lo. Covers fixed-income valuation, equities, capital budgeting, derivatives, and modern corporate treasury risk management.
Start Free Course ↗"• Modeled NPV/IRR capital budgeting scenarios, fixed-income yield curves, and arbitrage pricing strategies using MIT Sloan 15.401 frameworks."
GA4 telemetry, CRM pipelines, and technical search acquisition.
The single most requested hard skill in digital marketing and growth job descriptions. Configure event-based telemetry, conversion funnels, and attribution models.
Start Free Course ↗"• Configured GA4 event telemetry, conversion funnel diagnostics, and multi-channel attribution models to optimize Customer Acquisition Cost (CAC)."
Master CRM pipeline architecture, lifecycle stage automation, and Revenue Operations—directly queried by recruiting databases across B2B SaaS companies.
Start Free Course ↗"• Architected automated CRM lead lifecycles, multi-touch attribution workflows, and B2B demand generation funnels certified via HubSpot Academy."
Teaches programmatic keyword intent mapping, technical crawl optimization, backlink acquisition, and content ROI modeling without theoretical fluff.
Start Free Course ↗"• Executed technical SEO audits, search-intent keyword clustering, and organic acquisition strategies to scale non-paid search traffic."
Proves mastery over paid acquisition unit economics, automated Smart Bidding, Quality Score optimization, and Return on Ad Spend (ROAS) modeling.
Start Free Course ↗"• Managed paid search acquisition campaigns, automated bidding strategies, and keyword negative-match architectures to maximize ROAS."
Tokenized variables, Auto-Layout, WCAG accessibility, and DOM physics.
Senior product design teams hire systems thinkers who understand tokenized variables, responsive Auto-Layout constraints, component variants, and engineering handoff.
Start Free Course ↗"• Engineered scalable Figma design systems utilizing tokenized variables, multi-state component variants, and WCAG-compliant accessibility standards."
Bridges visual UI design and real browser physics—teaching CSS Grid, Flexbox, 3D transforms, keyframe motion choreography, and CMS architecture.
Start Free Course ↗"• Designed and deployed responsive, motion-rich web interfaces utilizing CSS Grid, custom keyframe interactions, and semantic DOM architecture."
Enterprise SaaS companies legally require WCAG compliance. Master semantic ARIA roles, keyboard focus management, and color-contrast systems directly from W3C.
Start Free Course ↗"• Audited and remediated product interfaces for WCAG 2.2 AA compliance, implementing semantic ARIA landmarks and keyboard navigation flows."