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Tradeoffs
- 1. TRADEOFFS Matthew Lehner @matthewpearse
- 2. Building Software Relies on Two Inputs: ! Time and Money
- 3. Businesses Have Money ! You have time
- 4. We have the best jobs on earth ! We get paid to build things that help to the world better
- 5. First Assumption: We’re here because we love building software
- 6. Second Assumption: We wouldn’t mind higher salaries or a greater level of autonomy over our work
- 7. I want to propose an idea: The ability to make better business decisions makes you a better developer. I’m not talking about straight up engineers, but people with jobs building software with practical applications
- 8. Better developers have more freedom
- 9. WHY? • Our salaries have to come from somewhere • If our work is not creating more value than it costs the people who sign our cheques then they’re going to run out of money, and we’ll be unemployed
- 10. WHY? • Understanding the relationship between your work and the business value that it creates gives you a better ability to make decisions that will allow you to have more freedom over what you do (more money, or time off)
- 11. A STORY 4 years ago I sent my first pull request
- 12. The Problem
- 13. The Solution
- 14. I could build a webpage
- 15. <html> <%= weird_stuff %> </html>
- 16. <html> <%= different_weird_stuff %> </html>
- 17. C++
- 18. Ruby has a low barrier to entry
- 19. Ruby
- 20. We don’t pick languages because they’re fast.
- 21. We pick languages because we can be productive with them
- 22. Productivity happens when our brains are free to solve problems
- 24. Managed Hosting vs. Random Scripts + Docker Hacking VS +
- 25. Bare Minimum Setup • Application Server • SSL Encryption • Database Server • Server Monitoring • Automated Backups
- 26. Should Also Have • Load balancing • Easy Horizontal Scalability
- 27. At Face Value EC2 Micro: $0.013/hour Heroku Dyno: $0.05/hour
- 28. At Face Value EC2 Micro: $0.013/hour Heroku Dyno: $0.05/hour
- 29. A Deeper Dive • Heroku set up time: 30 minutes • EC2 set up time: ????
- 30. A Deeper Dive • Heroku set up time: 30 minutes • EC2 set up time: 1 day (optimistic)
- 31. How much does a developer cost?
- 32. MATH TIME! • Average HK Dev Salary: $30,000/month • Equipment, office space, utilities, benefits, taxes: $20,000 • Total cost per month: $50,000 • Per year: $600,000 • Per week: $11,538
- 33. Developer Salary Math Cost per hour: $288
- 34. A Deeper Dive • Heroku set up time: 30 minutes • EC2 set up time: 1 day (optimistic)
- 35. A Deeper Dive • Heroku set up cost: $144 • EC2 set up cost: $2,304
- 36. Heroku cost per month • $1 $111.50USD
- 37. Heroku cost per month • $1 :(
- 38. AWS cost per month $18USD
- 39. AWS cost per month :)
- 40. Practically Speaking SETUP COSTS Heroku: $144 AWS: $2,304 MONTHLY COSTS Heroku: $868 AWS: $139
- 41. Monthly Breakdown 6000 4500 3000 1500 0 Heroku AWS Sept Oct Nov Dec Jan Feb
- 42. MERRY CHRISTMAS I got you some traffic for your site
- 43. Monthly Breakdown 7000 5250 3500 1750 0 Heroku AWS Sept Oct Nov Dec Jan Feb
- 44. If your primary responsibility isn’t managing servers, this will to slow down forward progress.
- 45. Servers are cheap, their resources are unlimited. You are not cheap, you have finite resources.
- 47. Mythical Man-Month Adding manpower to a late software project makes it later - Brooks’ law
- 48. We can’t add more people to projects and finish them faster
- 49. Adding people to a team increases complexity and increased complexity lowers productivity.
- 50. Developers are not horizontally scalable
- 51. However, we can work effectively on individual parts of a complex system
- 52. To make the right choices we need to be aware of: • The impact on the business’ bottom line • The effect on our productivity
- 53. Framework for maximum awesome 1. Work on things you like, and solve problems with technologies you’re excited about 2. Work towards mastery of the technologies you use every day 3. Evaluate how your day-to-day work creates value for your employer and focus on increasing this