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Stefan Alfbo

Software developer that is passionate about learning new technologies and solving complex problems. Always trying to be curious and open minded to improve my skills.

Sweden Joined on Sep 7, 2022

Education

KTH Royal Institute of Technology

Work

Software developer

Badges

Two Year Club

Two Year Club badge

Two Year Club

This badge celebrates the longevity of those who have been a registered member of the DEV Community for at least two years.

Writing Debut

Writing Debut badge

Writing Debut

Awarded for writing and sharing your first DEV post! Continue sharing your work to earn the 4 Week Writing Streak Badge.

16 Week Writing Streak

16 Week Writing Streak badge

16 Week Writing Streak

You are a writing star! You've written at least one post per week for 16 straight weeks. Congratulations!

One Year Club

One Year Club badge

One Year Club

This badge celebrates the longevity of those who have been a registered member of the DEV Community for at least one year.

8 Week Writing Streak

8 Week Writing Streak badge

8 Week Writing Streak

The streak continues! You've written at least one post per week for 8 consecutive weeks. Unlock the 16-week badge next!

4 Week Writing Streak

4 Week Writing Streak badge

4 Week Writing Streak

You've posted at least one post per week for 4 consecutive weeks!

Skills/Languages

AWS
C#/F#
Go
PostgreSQL
Python
React
Rust
TypeScript/JavaScript

101 posts published

6 comments written

79 tags followed

100 Days To Offload - completed

100 Days To Offload - completed

#challenge #100daystooffload #blog #writing

1 min read

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Go and WebUI

#100daystooffload #go #webui #gui

3 min read

ScoutSuite

#100daystooffload #tooling #security #cloud

2 min read

AWS Summit Stockholm

AWS Summit Stockholm

#100daystooffload #aws #awssummit #event

1 min read

Create plugins in Go

Create plugins in Go

#100daystooffload #go #plugin #programming

3 min read

Exploring the tool ./jq

Exploring the tool ./jq

#100daystooffload #jq #json #tooling

2 min read

Genetic Algorithms with Go

Genetic Algorithms with Go

#100daystooffload #geneticalgorithms #go #ai

5 min read

Benchmark testing in Go

Benchmark testing in Go

#100daystooffload #go #testing #benchmark

3 min read

Implement PKCS#7 padding

Implement PKCS#7 padding

#challenge #100daystooffload #cryptopals #security

3 min read

Gatekeeper One - Level 13

Gatekeeper One - Level 13

#100daystooffload #ethernaut #solidity #ethereum

5 min read

Detect AES in ECB mode

Detect AES in ECB mode

#challenge #100daystooffload #cryptopals #security

3 min read

AES in ECB mode

AES in ECB mode

#challenge #100daystooffload #cryptopals #aes

2 min read

Break repeating-key XOR

Break repeating-key XOR

#challenge #100daystooffload #cryptopals

6 min read

LangChain Go

#100daystooffload #go #llm #langchain

2 min read

Python JSON schema

Python JSON schema

#100daystooffload #json #django #python

4 min read

OWASP Amass

#100daystooffload #tooling #security #osint

2 min read

Implementing repeating-key XOR

Implementing repeating-key XOR

#challenge #100daystooffload #cryptopals

2 min read

The go vet command

The go vet command

#100daystooffload #go #tooling #vet

2 min read

Detect single-character XOR

Detect single-character XOR

#challenge #100daystooffload #cryptopals

2 min read

Single-byte XOR cipher

Single-byte XOR cipher

#challenge #100daystooffload #cryptopals

3 min read

Constructors in Go?

Constructors in Go?

#100daystooffload #go #beginners #programming

2 min read

Fixed XOR

#challenge #100daystooffload #cryptopals #beginners

2 min read

Convert hex to base64

Convert hex to base64

#challenge #100daystooffload #cryptopals #crypto

2 min read

the cryptopals crypto challenges

the cryptopals crypto challenges

#challenge #100daystooffload #cryptography #beginners

1 min read

Write tests for your type definitions

Write tests for your type definitions

#100daystooffload #typescript #testing #typesafe

2 min read

git stash

#100daystooffload #git #tooling #stash

2 min read

Open API with Postman

Open API with Postman

#100daystooffload #postman #openapi #tooling

2 min read

Example tests in Go

Example tests in Go

#100daystooffload #go #testing #programming

3 min read

Live reloading in Go

Live reloading in Go

#100daystooffload #go #air #reloading

2 min read

wget - a non-interactive network retriever

wget - a non-interactive network retriever

#100daystooffload #wget #tooling #cli

2 min read

Find code in open source projects

Find code in open source projects

#100daystooffload #tooling #programming #productivity

1 min read

Privacy - Level 12

Privacy - Level 12

#100daystooffload #ethernaut #solidity #ethereum

4 min read

Mock /api/auth/me

Mock /api/auth/me

#100daystooffload #playwright #testing #auth0

2 min read

quick.Check in Go

quick.Check in Go

#100daystooffload #go #testing #pbt

4 min read

func init() {}

#100daystooffload #go #programming

2 min read

Internal packages in Go

Internal packages in Go

#100daystooffload #go #programming #cleancode

2 min read

go test <package>

go test <package>

#100daystooffload #go #testing #programming

1 min read

White box and Black box testing in Go

White box and Black box testing in Go

#100daystooffload #go #testing #programming

3 min read

How to share a secret

How to share a secret

#100daystooffload #cryptography #shamir #fsharp

6 min read

The modulus operator in .NET

The modulus operator in .NET

#dotnet #100daystooffload #csharp #fsharp

1 min read

LWW Register

#100daystooffload #crdt #algorithms #csharp

8 min read

Elevator - Level 11

Elevator - Level 11

#100daystooffload #ethernaut #soldity #ethereum

3 min read

Foundry - chisel

Foundry - chisel

#100daystooffload #foundry #chisel #solidity

2 min read

Re-entrancy - Level 10

Re-entrancy - Level 10

#100daystooffload #ethernaut #solidity #ethereum

4 min read

Advent of Code 2023

Advent of Code 2023

#100daystooffload #adventofcode #puzzles #programming

1 min read

Discriminated Unions

Discriminated Unions

#100daystooffload #programming #types #datastructures

1 min read

Playwright with GitHub Actions

Playwright with GitHub Actions

#100daystooffload #playwright #githubactions #testing

2 min read

LangChain for LLM Application Development

LangChain for LLM Application Development

#100daystooffload #llm #langchain #openai

3 min read

An overview of CRDTs

An overview of CRDTs

#100daystooffload #crdt #distributedsystems #algorithms

2 min read

Django ORM with objects

Django ORM with objects

#100daystooffload #django #orm #python

2 min read

100 Days To Offload

100 Days To Offload

#challenge #100daystooffload #blog #writing

1 min read

OCaml, Python and protobuf

OCaml, Python and protobuf

#100daystooffload #protobuf #ocaml #python

3 min read

Introduction to Protocol Buffers

Introduction to Protocol Buffers

#100daystooffload #protobuf #serializing #beginners

3 min read

Building Systems with the ChatGPT API

Building Systems with the ChatGPT API

#100daystooffload #course #chatgpt #llm

3 min read

MinIO as a local S3 service

MinIO as a local S3 service

#100daystooffload #minio #s3 #devcontainer

4 min read

Conway's Game of Life in F#

Conway's Game of Life in F#

#100daystooffload #fsharp #bolero #webassembly

6 min read

Lovely Silk

#100daystooffload #silk #python #django

2 min read

SEC-T - 0x0FOO

#100daystooffload #security #conference #hacking

1 min read

Unit testing with OCaml

Unit testing with OCaml

#100daystooffload #ounit2 #unittesting #ocaml

3 min read

King - Level 09

King - Level 09

#100daystooffload #ethernaut #solidity #ethereum

3 min read

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