How to Land a Good Go Job – Ole Bulbuk

Transcript

1. How to Land a Good Go Job or what to watch out for so your new team member won't break the service 2020-03-28 Ole Bulbuk Senior Go Engineer, solarisBank AG; co-organizer of Berlin Go meetup; involved in hiring decisions for 20 years
2. What to expect? Where to !nd (remote) jobs 2
3. What to expect? Where to !nd (remote) jobs Peculiarities about remote jobs 3
4. What to expect? Where to !nd (remote) jobs Peculiarities about remote jobs Job situation in Berlin 4
5. What to expect? Where to !nd (remote) jobs Peculiarities about remote jobs Job situation in Berlin Hiring process 5
6. What to expect? Where to !nd (remote) jobs Peculiarities about remote jobs Job situation in Berlin Hiring process Technical interviews 6
7. Where to !nd (remote) jobs Gopher Slack: #jobs Newsletter: https://golangweekly.com/ (https://golangweekly.com/) Work with Go: https://workwithgo.com/ (https://workwithgo.com/) Golang projects: https://www.golangprojects.com/ (https://www.golangprojects.com/) We work remotely: https://weworkremotely.com/ (https://weworkremotely.com/) Remote OK Go jobs: https://remoteok.io/remote-golang-jobs (https://remoteok.io/remote-golang-jobs) Indeed remote Go jobs: https://www.indeed.com/q-golang-l-remote-jobs.html (https://www.indeed.com/q-golang-l-remote-jobs.html) 7
8. Peculiarities About Remote Jobs Big experiment: currently we all do remote jobs 8
9. Peculiarities About Remote Jobs Big experiment: currently we all do remote jobs Full remote companies have !gured things out 9
10. Peculiarities About Remote Jobs Big experiment: currently we all do remote jobs Full remote companies have !gured things out This is currently getting better 10
11. Peculiarities About Remote Jobs Big experiment: currently we all do remote jobs Full remote companies have !gured things out This is currently getting better It really is a matter of trust 11
12. Peculiarities About Remote Jobs Big experiment: currently we all do remote jobs Full remote companies have !gured things out This is currently getting better It really is a matter of trust Make the employer believe that you perform well when remote 12
13. Peculiarities About Remote Jobs Big experiment: currently we all do remote jobs Full remote companies have !gured things out This is currently getting better It really is a matter of trust Make the employer believe that you perform well when remote It often helps to accept lower pay during probation period 13
14. Job Situation in Berlin Language for almost all Go positions: English 14
15. Job Situation in Berlin Language for almost all Go positions: English By far biggest market for Go positions in Germany. 15
16. Job Situation in Berlin Language for almost all Go positions: English By far biggest market for Go positions in Germany. Salaries are highly dependent on the location of the company. 16
17. Job Situation in Berlin Language for almost all Go positions: English By far biggest market for Go positions in Germany. Salaries are highly dependent on the location of the company. Junior developers earn around 50K. 17
18. Job Situation in Berlin Language for almost all Go positions: English By far biggest market for Go positions in Germany. Salaries are highly dependent on the location of the company. Junior developers earn around 50K. Senior developers earn around 80K. 18
19. Job Situation in Berlin Language for almost all Go positions: English By far biggest market for Go positions in Germany. Salaries are highly dependent on the location of the company. Junior developers earn around 50K. Senior developers earn around 80K. Rare lead developers earn more. 19
20. Job Situation in Berlin Language for almost all Go positions: English By far biggest market for Go positions in Germany. Salaries are highly dependent on the location of the company. Junior developers earn around 50K. Senior developers earn around 80K. Rare lead developers earn more. Most jobs are for mid- to senior developers. 20
21. Hiring Process Screening interview with HR person 21
22. Hiring Process Screening interview with HR person Coding challenge 22
23. Hiring Process Screening interview with HR person Coding challenge Technical interviews 23
24. Hiring Process Screening interview with HR person Coding challenge Technical interviews Algorithms and data structures? 24
25. Hiring Process Screening interview with HR person Coding challenge Technical interviews Algorithms and data structures? Brain teasers? 25
26. Hiring Process Screening interview with HR person Coding challenge Technical interviews Algorithms and data structures? Brain teasers? Cultural !t 26
27. Hiring Process Screening interview with HR person Coding challenge Technical interviews Algorithms and data structures? Brain teasers? Cultural !t CTO or other boss 27
28. Technical Interviews 27.1. What is Go used for? 28
29. Advertisement bidding Low latency (ca. 50ms) request handling 29
30. Advertisement bidding Low latency (ca. 50ms) request handling High concurrency 30
31. Advertisement bidding Low latency (ca. 50ms) request handling High concurrency Scalability matters 31
32. Advertisement bidding Low latency (ca. 50ms) request handling High concurrency Scalability matters Knowledge about the world held in RAM 32
33. Advertisement bidding Low latency (ca. 50ms) request handling High concurrency Scalability matters Knowledge about the world held in RAM Web API 33
34. Advertisement bidding Low latency (ca. 50ms) request handling High concurrency Scalability matters Knowledge about the world held in RAM Web API Performance critical stu" behind interfaces 34
35. Advertisement bidding Low latency (ca. 50ms) request handling High concurrency Scalability matters Knowledge about the world held in RAM Web API Performance critical stu" behind interfaces Many engineers love high performance stu" 35
36. Advertisement bidding Low latency (ca. 50ms) request handling High concurrency Scalability matters Knowledge about the world held in RAM Web API Performance critical stu" behind interfaces Many engineers love high performance stu" Enough room for normal devs 36
37. Advertisement bidding Low latency (ca. 50ms) request handling High concurrency Scalability matters Knowledge about the world held in RAM Web API Performance critical stu" behind interfaces Many engineers love high performance stu" Enough room for normal devs Few, small companies 37
38. Cloud technologies Go for system programming 38
39. Cloud technologies Go for system programming Command line tools 39
40. Cloud technologies Go for system programming Command line tools Low level programming 40
41. Cloud technologies Go for system programming Command line tools Low level programming Low latency services 41
42. Cloud technologies Go for system programming Command line tools Low level programming Low latency services Highly skilled engineers 42
43. Cloud technologies Go for system programming Command line tools Low level programming Low latency services Highly skilled engineers Few, small companies 43
44. FinTech Use Go as modern Java 44
45. FinTech Use Go as modern Java Mistakes can cost a lot of money 45
46. FinTech Use Go as modern Java Mistakes can cost a lot of money Web APIs 46
47. FinTech Use Go as modern Java Mistakes can cost a lot of money Web APIs Room for devs who test carefully 47
48. FinTech Use Go as modern Java Mistakes can cost a lot of money Web APIs Room for devs who test carefully Quite some companies from small to medium 48
49. Blockchain technologiy Distributed services 49
50. Blockchain technologiy Distributed services Very abstract stu" 50
51. Blockchain technologiy Distributed services Very abstract stu" Highly skilled engineers 51
52. Blockchain technologiy Distributed services Very abstract stu" Highly skilled engineers Few, small companies 52
53. Diverse companies building services Use Go as modern Java 53
54. Diverse companies building services Use Go as modern Java Web APIs 54
55. Diverse companies building services Use Go as modern Java Web APIs Lots of room for devs with diverse backgrounds 55
56. Diverse companies building services Use Go as modern Java Web APIs Lots of room for devs with diverse backgrounds Many companies from small to huge 56
57. Diverse companies building services Use Go as modern Java Web APIs Lots of room for devs with diverse backgrounds Many companies from small to huge Fastest growing segment 57
58. Job market take away Web APIs 58
59. Job market take away Web APIs Business software 59
60. Job market take away Web APIs Business software Growing with more adoption of Go 60
61. What to know about Web APIs? 61
62. HTTP Search terms: stateless HTTP, REST (REpresentational State Transfer), HTTP methods (GET, POST, DELETE, PUT, PATCH), idempotence, gRPC, GraphQL (nice to know) No Web without HTTP 62
63. HTTP Search terms: stateless HTTP, REST (REpresentational State Transfer), HTTP methods (GET, POST, DELETE, PUT, PATCH), idempotence, gRPC, GraphQL (nice to know) No Web without HTTP If the client doesn't get the response back it will try again: idempotence 63
64. Authentication Search terms: Cookie + server side session, JWT (JSON Web Token), OAuth 2.0 Authentication: Who is it? 64
65. Authentication Search terms: Cookie + server side session, JWT (JSON Web Token), OAuth 2.0 Authentication: Who is it? You really need to know about JWT 65
66. Authentication Search terms: Cookie + server side session, JWT (JSON Web Token), OAuth 2.0 Authentication: Who is it? You really need to know about JWT O"er only 1 good cipher for JWT 66
67. Authentication Search terms: Cookie + server side session, JWT (JSON Web Token), OAuth 2.0 Authentication: Who is it? You really need to know about JWT O"er only 1 good cipher for JWT OAuth 2.0 is nice to know 67
68. Authorization Search terms: Role based authorization (RBAC) Authorization: What is allowed? 68
69. Authorization Search terms: Role based authorization (RBAC) Authorization: What is allowed? RBAC is king and many companies use some derivative 69
70. Database Search terms: SQL, RDBMS (Relational DataBase Management System), SQL injection, DB migration, DB transactions, DB lock levels Heart of every business software 70
71. Database Search terms: SQL, RDBMS (Relational DataBase Management System), SQL injection, DB migration, DB transactions, DB lock levels Heart of every business software Long term storage -> hard to change 71
72. Database Search terms: SQL, RDBMS (Relational DataBase Management System), SQL injection, DB migration, DB transactions, DB lock levels Heart of every business software Long term storage -> hard to change Types: relational, document, key-value, graph 72
73. Database Search terms: SQL, RDBMS (Relational DataBase Management System), SQL injection, DB migration, DB transactions, DB lock levels Heart of every business software Long term storage -> hard to change Types: relational, document, key-value, graph Use cases: business data, archiving, caching, ... 73
74. Database Search terms: SQL, RDBMS (Relational DataBase Management System), SQL injection, DB migration, DB transactions, DB lock levels Heart of every business software Long term storage -> hard to change Types: relational, document, key-value, graph Use cases: business data, archiving, caching, ... RDBMS (Relational DataBase Management System) is still the most important 74
75. 3rd Party API Search terms: service resilience, time-out, circuit breaker, retry with randomized exponential back-o" No direct in#uence on third party! 75
76. 3rd Party API Search terms: service resilience, time-out, circuit breaker, retry with randomized exponential back-o" No direct in#uence on third party! Can stop the whole system 76
77. 3rd Party API Search terms: service resilience, time-out, circuit breaker, retry with randomized exponential back-o" No direct in#uence on third party! Can stop the whole system Error handling is paramount 77
78. 3rd Party API Search terms: service resilience, time-out, circuit breaker, retry with randomized exponential back-o" No direct in#uence on third party! Can stop the whole system Error handling is paramount Call to 3rd party in the context of a transaction 78
79. Testing Search terms: test pyramid, test funnel, stress tests Deployment with con!dence 79
80. Testing Search terms: test pyramid, test funnel, stress tests Deployment with con!dence A good test suite is the basis for every refactoring 80
81. Testing Search terms: test pyramid, test funnel, stress tests Deployment with con!dence A good test suite is the basis for every refactoring Good tests enable and support changes 81
82. Code Quality Search terms: surviving software dependencies, clean code Maintainability 82
83. Code Quality Search terms: surviving software dependencies, clean code Maintainability Simplicity counts 83
84. Code Quality Search terms: surviving software dependencies, clean code Maintainability Simplicity counts E"ects can be seen only long-term 84
85. DevOps Search terms: Docker, Kubernetes, Observability/Telemetry, Prometheus (monitoring), Jaeger (tracing) Many problems today arise between systems 85
86. DevOps Search terms: Docker, Kubernetes, Observability/Telemetry, Prometheus (monitoring), Jaeger (tracing) Many problems today arise between systems Being able to debug inter service problems is very important skill 86
87. Bad Job Interviews Brain teasers 87
88. Bad Job Interviews Brain teasers Algorithms and data structures 88
89. Bad Job Interviews Brain teasers Algorithms and data structures Only the top x% of engineers work for us 89
90. Wrap Up Talked about all parts of the hiring process 90
91. Wrap Up Talked about all parts of the hiring process Focus on technical interviews 91
92. Wrap Up Talked about all parts of the hiring process Focus on technical interviews Happy applying! 92
93. Thank you Ole Bulbuk Senior Go Engineer, solarisBank AG; co-organizer of Berlin Go meetup; involved in hiring decisions for 20 years https://#owdev.github.io/static/present/2020/go-job/present.html (https://#owdev.github.io/static/present/2020/go-job/present.html) @#owdev_org (http://twitter.com/#owdev_org) Attributions for images: All Gophers have been taken from Maria Letta's excellent 'free-gophers-pack'. Spider web by: I, Luc Viatour / CC BY-SA Passport photo by: Noble / Public domain Stop sign by: United Nations / Public domain Test pyramid by: Abbe98 / CC BY-SA