Lines and role paths

Courses sit on 10 lines, one per subject. A role path is a route across several lines in the order a job needs them, from your first role to senior.

Role paths

Start here

Career StarterNew to tech? Start here and build the foundations every role needs.5 courses, about 17 h open now · First steps → First codeVibe Coder / No-code BuilderBuild real apps with AI tools, then learn enough engineering to make them safe and lasting.9 courses, about 31 h open now · Fresher → Builder → Senior builder

Build software

Full-Stack DeveloperWork like a professional developer from your editor to production.13 courses, about 47 h open now · Fresher → Junior → Mid-level → SeniorBackend EngineerDesign, build and run services that stay fast and reliable as they grow.12 courses, about 47 h open now · Fresher → Mid-level → SeniorMobile Developer (React Native)Build iOS and Android apps with React Native that work offline and on cheap phones.13 courses, about 49 h open now · Fresher → Junior → Mid-level → SeniorAI EngineerBuild LLM features and agents, measure them with evals and run them in production.11 courses, about 41 h open now · Fresher → Junior → Mid-level → SeniorAI BuilderUnderstand how AI systems work and ship AI features people trust.5 courses, about 17 h open now · Foundations → AI features

Data

Data AnalystAnswer business questions with spreadsheets, SQL, statistics and dashboards people trust.8 courses, about 29 h open now · Fresher → Junior → Mid-level → SeniorData ScientistFrame problems as models, prove they beat simple rules and run them in production.9 courses, about 33 h open now · Fresher → Junior → Mid-level → Senior

Run and test software

QA EngineerFind the bugs that matter, then automate the checks so teams can ship with confidence.12 courses, about 43 h open now · Fresher → Junior → Mid-level → SeniorDevOps / SRE EngineerAutomate delivery and keep services reliable with pipelines, infrastructure as code and SLOs.12 courses, about 43 h open now · Fresher → Junior → Mid-level → SeniorTechOps / IT Operations EngineerKeep servers, networks, accounts and devices running, and grow into DevOps or security.12 courses, about 41 h open now · Fresher → Junior → Mid-level → SeniorDatabase Administrator (DBA)Keep production databases fast, safe and recoverable, from first SQL to running replication at scale.10 courses, about 36 h open now · Fresher → Junior → Mid-level → Senior

Security

Security Analyst (Defensive)Detect, investigate and respond to attacks in a security operations centre.10 courses, about 35 h open now · Fresher → Junior → Mid-level → SeniorPenetration Tester (Offensive)Break into systems legally, explain the risk and get the holes fixed.10 courses, about 36 h open now · Fresher → Junior → Mid-level → Senior

Architecture

System / Solution ArchitectDesign systems that meet business goals and explain the trade-offs to everyone.13 courses, about 49 h open now · Engineer → Senior engineer → Architect → PrincipalBusiness / Enterprise ArchitectConnect strategy to systems with capability maps, portfolios and roadmaps the board can fund.10 courses, about 32 h open now · Analyst → Senior analyst → Architect → Lead

Product and business

Product ManagerLead products with enough technical depth to earn your engineers' trust.15 courses, about 47 h open now · Associate PM → Product manager → Senior PM → Lead PMBusiness AnalystUnderstand the problem before the solution, and turn needs into requirements teams can build.11 courses, about 37 h open now · Fresher → Junior → Mid-level → SeniorFinance for TechSpeak both finance and tech: budgets, cloud costs, unit economics and business cases.9 courses, about 29 h open now · Fresher → Junior → Mid-level → Senior

Lead

Team Lead / Engineering ManagerLead the work and then the people: tech lead first, then engineering manager.10 courses, about 33 h open now · Senior engineer → Tech lead → Engineering manager → Senior managerHead of Department / CTORun technology for a whole organisation: strategy, people, money, risk and the board.11 courses, about 39 h open now · Engineering manager → Director → Head of department / CTO

Changing roles

Moving from one job to another? Keep what carries over, skip what you already do, and add a few bridge courses. Pick a move for a week-by-week plan, or choose any two roles.

QA engineer → developerYou already think in edge cases and know the product. Automating tests is the bridge into writing production code.Bridge: Test Automation and Quality Engineering. Skim 3 you know. Then the Full-Stack Developer path.Developer → product managerYour technical depth earns trust fast. The new work is discovery, strategy and deciding what not to build.Skim 4 you know. Then the Product Manager path.Business analyst → product managerYou already turn needs into requirements. Add product discovery, strategy and ownership of outcomes.Skim 4 you know. Then the Product Manager path.Developer → architectSkip the foundations you use every day and add the decision-making, communication and enterprise view architects need.Bridge: From Engineer to Tech Lead, Communication & Leadership. Skim 3 you know. Skip 3. Then the System / Solution Architect path.Solution architect → business architectMove from systems to the whole business: capabilities, value streams, finance and strategy.Skip 2. Then the Business / Enterprise Architect path.Data analyst → data scientistYour SQL and reporting carry over. Add statistics, modelling and the engineering habits models need in production.Bridge: Your Developer Setup, Git from the Inside. Skim 2 you know. Skip 3. Then the Data Scientist path.Operations → DevOps / SREYou know servers, networks and incidents. Add code, pipelines and infrastructure as code.Bridge: JavaScript Deep Dive. Skim 2 you know. Skip 1. Then the DevOps / SRE Engineer path.Operations → security analystLogs, networks and accounts are already your world. Add detection, investigation and secure applications.Skip 2. Then the Security Analyst (Defensive) path.Developer → security analystYou can read code and logs. Learn how attacks unfold and how a SOC detects and responds.Skim 1 you know. Skip 2. Then the Security Analyst (Defensive) path.Developer → penetration testerYou know how apps are built, which is half of knowing how they break. Add operations, attacks and reporting.Skip 3. Then the Penetration Tester (Offensive) path.Developer → AI engineerYour web and API skills carry over. Add LLM features, evals, agents and the statistics behind measuring them.Bridge: Statistics for Data Work. Skim 3 you know. Skip 2. Then the AI Engineer path.Web developer → mobile developerReact and APIs carry straight over. The new parts are mobile UI, offline data and app store releases.Skim 4 you know. Skip 4. Then the Mobile Developer (React Native) path.Backend developer → DBAYou write the queries; now you run the database: backups, replication, tuning and access.Skim 3 you know. Skip 1. Then the Database Administrator (DBA) path.Senior engineer → engineering managerYour engineering experience carries over. The new job is people: 1:1s, hiring, feedback and team health.Skim 3 you know. Then the Team Lead / Engineering Manager path.Any team lead → engineering managerLeading QA, data, IT or support? The people skills are the same. Learn enough about how software is built to lead engineers well.Bridge: How the Web Works. Skip 1. Then the Team Lead / Engineering Manager path.Engineering manager → head of department or CTOFrom leading teams to leading leaders: strategy, budgets, risk and the board.Skim 2 you know. Skip 1. Then the Head of Department / CTO path.

The lines

System DesignHow real systems are built: the web, databases, scaling, distributed systems and the giants.8 courses, about 29 h open nowDeveloper FoundationsThe everyday tools and language of software teams: VS Code, Git, GitHub and JavaScript.9 courses, about 33 h open nowProduct ManagementFind the right problems, decide what to build, ship it and prove it worked.11 courses, about 33 h open nowAI EngineeringBuild with AI: vibe-code an app, ship LLM features and agents, and run them safely in production.6 courses, about 20 h open nowDataTurn raw data into decisions: spreadsheets and SQL, statistics, dashboards, machine learning and models in production.6 courses, about 22 h open nowEngineering RolesThe specialist jobs that keep software running and right: TechOps, DevOps, SRE, databases, QA and mobile.8 courses, about 29 h open nowCybersecurityDefend and attack (legally): security foundations, secure code, the SOC and penetration testing.4 courses, about 14 h open nowArchitectureDecide how systems and organisations fit together: solution, software and enterprise architecture.4 courses, about 14 h open nowBusiness & FinanceThe business side of tech: analysis and requirements, finance and budgets, and how products make money.4 courses, about 13 h open nowLeadershipLead the work and the people: tech lead, engineering manager, head of department and CTO.4 courses, about 15 h open now

System Design

8 courses, 29 h
  1. How the Web Works6 stopsSystem Design line, station 1
  2. SQL & Data Modeling6 stopsChange for DataSystem Design line, station 2
  3. Databases at Scale6 stopsSystem Design line, station 3
  4. Scaling Building Blocks7 stopsSystem Design line, station 4
  5. Distributed Systems5 stopsChange for ArchitectureSystem Design line, station 5
  6. Running Software in Production3 stopsChange for Engineering RolesSystem Design line, station 6
  7. System Design Case Studies4 stopsChange for ArchitectureSystem Design line, station 7
  8. Inside the Tech Giants10 stopsSystem Design line, station 8

Developer Foundations

9 courses, 33 h
  1. Your Developer Setup4 stopsDeveloper Foundations line, station 1
  2. Git from the Inside7 stopsDeveloper Foundations line, station 2
  3. GitHub for Teams7 stopsDeveloper Foundations line, station 3
  4. JavaScript Deep Dive8 stopsDeveloper Foundations line, station 4
  5. JavaScript in the Real World6 stopsDeveloper Foundations line, station 5
  6. React for the Web6 stopsDeveloper Foundations line, station 6
  7. Building APIs with Node.js6 stopsDeveloper Foundations line, station 7
  8. Ship a Project End to End3 stopsDeveloper Foundations line, station 8
  9. Software Development: Idea to App7 stopsDeveloper Foundations line, station 9

Product Management

11 courses, 33 h
  1. Product Thinking Foundations4 stopsProduct Management line, station 1
  2. Product Discovery5 stopsProduct Management line, station 2
  3. Strategy, Priorities & Roadmaps5 stopsProduct Management line, station 3
  4. From Spec to Launch6 stopsProduct Management line, station 4
  5. Metrics & Product Analytics6 stopsProduct Management line, station 5
  6. The Business of Product4 stopsChange for Business & FinanceProduct Management line, station 6
  7. Growth & Adoption4 stopsProduct Management line, station 7
  8. Internal Tools, Operations & Platforms5 stopsProduct Management line, station 8
  9. Product Teardowns & Idea Lab6 stopsProduct Management line, station 9
  10. AI Product Management5 stopsChange for AI EngineeringProduct Management line, station 10
  11. Communication & Leadership5 stopsChange for LeadershipProduct Management line, station 11

AI Engineering

6 courses, 20 h
  1. Vibe Coding: Build Apps with AI6 stopsAI Engineering line, station 1
  2. LLM Apps: Prompts, RAG and Evals6 stopsAI Engineering line, station 2
  3. AI Systems for Builders4 stopsAI Engineering line, station 3
  4. Building AI Agents6 stopsAI Engineering line, station 4
  5. AI Engineering in Production6 stopsAI Engineering line, station 5
  6. AI Product Management5 stopsChange for Product ManagementAI Engineering line, station 6

Data

6 courses, 22 h
  1. Data Analysis with Excel, Python & AI7 stopsData line, station 1
  2. SQL & Data Modeling6 stopsChange for System DesignData line, station 2
  3. Statistics for Data Work6 stopsData line, station 3
  4. Dashboards and Business Intelligence6 stopsData line, station 4
  5. Data Science and Machine Learning6 stopsData line, station 5
  6. Machine Learning in Production6 stopsData line, station 6

Engineering Roles

8 courses, 29 h
  1. TechOps: Linux, Networks and IT Operations6 stopsEngineering Roles line, station 1
  2. DevOps: CI/CD, Containers and Infrastructure as Code6 stopsEngineering Roles line, station 2
  3. Running Software in Production3 stopsChange for System DesignEngineering Roles line, station 3
  4. Site Reliability Engineering7 stopsEngineering Roles line, station 4
  5. Database Administration with PostgreSQL6 stopsEngineering Roles line, station 5
  6. Software Testing and QA6 stopsEngineering Roles line, station 6
  7. Test Automation and Quality Engineering6 stopsEngineering Roles line, station 7
  8. Mobile Apps with React Native6 stopsEngineering Roles line, station 8

Cybersecurity

4 courses, 14 h
  1. Security Foundations6 stopsCybersecurity line, station 1
  2. Application Security for Developers6 stopsCybersecurity line, station 2
  3. Defensive Security: SOC, Detection and Response6 stopsCybersecurity line, station 3
  4. Offensive Security: Ethical Hacking and Pentesting6 stopsCybersecurity line, station 4

Architecture

4 courses, 14 h
  1. Distributed Systems5 stopsChange for System DesignArchitecture line, station 1
  2. System Design Case Studies4 stopsChange for System DesignArchitecture line, station 2
  3. Software and Solution Architecture7 stopsArchitecture line, station 3
  4. Business and Enterprise Architecture6 stopsChange for Business & FinanceArchitecture line, station 4

Business & Finance

4 courses, 13 h
  1. Business Analysis6 stopsBusiness & Finance line, station 1
  2. Finance for Tech Teams6 stopsBusiness & Finance line, station 2
  3. The Business of Product4 stopsChange for Product ManagementBusiness & Finance line, station 3
  4. Business and Enterprise Architecture6 stopsChange for ArchitectureBusiness & Finance line, station 4

Leadership

4 courses, 15 h
  1. From Engineer to Tech Lead6 stopsLeadership line, station 1
  2. Engineering Management6 stopsLeadership line, station 2
  3. Communication & Leadership5 stopsChange for Product ManagementLeadership line, station 3
  4. Leading a Tech Department: Head of Engineering to CTO7 stopsLeadership line, station 4