How to define candidate level on the interview? How to do that quickly and precisely? How to know one's technical level? How to improve it and build successful IT career? I try to answer all those questions in my talk.

1. Junior, middle, senior?
October,14th 2016

2. DEVELOPER 12 YEARS
TRAINER 4 YEARS
WRITER 3 BOOKS

3. SPEAKER
FOUNDER

5. Review experience
Review knowledge
Review skills
Team work
Tests
Practical tasks
Level estimation

6. How to estimate
technical level
quickly and precisely?

7. Interview
Training
Development
Teaching
Experience

13. Technical level

14. Technical level

15. Level Description
Novice No programing knowledge
Trainee(Intern) No job experience
Junior < 1 year of experience
Middle 1-3 years
Senior 3-5 years
Technical lead 5-7 years
Companies opinion

16. Companies opinion

17. Level Description
Novice
Trainee(Intern) Needs experience
Junior Needs mentoring
Middle Able to work without mentoring
Senior Able to supervise others
Technical lead Able to supervise the team
Team work

18. Level Description
Novice No questions
Trainee(Intern) Questions
Junior More questions than answers
Middle Same number of questions and
answers
Senior More answers than questions
Technical lead More orders than answers and
questions
Data flow

19. Programming

20. Level Description
Novice Not able to write code
Trainee(Intern) Write code that compiles
Junior Write code that works
Middle Write code that you understand
Senior Write code that you like
Technical lead Write code that is sample for you
Programming

21. Creativity
Abstract thinking
Programming skills
Analytical skills
Knowledge
Fundamentals

22. Fundamentals

23. Knowledge

24. Analytic skills

25. Abstract thinking

27. Fundamentals

28. Ava Rava
Java Gava
What is popular programming language?

29. JDK JPA
JCP JVM
What is required to run Java application?

30. Cross-
platform
Open-source
Performance
Objected-
oriented
What is NOT Java advantage?

31. Knowledge

32. What is Collections framework?
What are interfaces in Collections framework?
What are classes in Collections framework?
Which type is used to store sequential ordered elements?
What is the method to store new element in List?
Which collections are thread-safe?
What are immutable collections in Java?
Knowledge

33. What is the difference between ArrayList and LinkedList?
What is search complexity in LinkedList(HashMap)?
When you prefer TreeMap in favour of HashMap?
What is disadvantage of using HashMap?
How does HashMap growing affect performance?
Which list type would use in you job and why?
How would off-heap map work?
Analytic skills

34. Does Java support inheritance?
Does Java support operator overloading?
How to sort LinkedHashSet?
Deep analytic skills

35. Programming
skills

36. Optimize
Refactor
Review
Read
Write
Programming skills

37. Write
skills

38. Write a method that converts ArrayList to HashSet

39. Write a method that converts ArrayList to HashSet

40. Write a method that converts ArrayList to HashSet

41. Write a method that converts ArrayList to HashSet

42. Write a method that converts ArrayList to HashSet

43. Write a method that converts ArrayList to HashSet

44. Find element in the sorted array

45. Read skills

46. Outcome of this code

47. Outcome of this code

48. Review skills

49. Concise Readable
Self-describing Reusable
Testable Modern
Flexible Scalable
Effective

50. Is this class immutable?

51. Purpose of this method

52. Find a bug

53. Refactoring
skills

54. Refactoring

55. Refactoring

56. Refactoring

57. Refactoring

58. Optimization
skills

59. Optimization
Performance
Distributed
Asynchronous
Scalability

60. Optimization

61. Optimization

62. Optimization

63. Optimization

64. What is most suitable collection in Java for LIFO operations?
What is best list implementation in Java for multi-threading
tasks?
What are best practices working with collections?
Abstract thinking

65. Creativity

66. Write all possible approaches to check if string is a number
Write all possible ways to generate random string
Write all possible ways to iterate over tree(binary tree)
Write all possible ways to encrypt string with/without
possible decryption
Write all possible ways to find all the classes in the current
application
Write your own most efficient list
Creativity

69. Design Architecture DevOps
TDD
Technical
writing
Your career

70. Level Focus Produces
Intern Language basics Expressions
Junior Language advanced Functions
Middle Frameworks and libraries,
software processes
Types
Senior Software structuring,
business communication
Components
Skill levels

71. Q&A
• Sergey Morenets, sergey.morenets@gmail.com