Quick answers
What does a software engineer actually do all day?
Most days split between writing new code, reading other people's code during review, fixing bugs, and talking to teammates about what to build next. Meetings, planning and mentoring take up more time than newcomers expect. A senior engineer often writes less code personally than a junior one, spending more time on design decisions, reviews and unblocking others.
Do I need a computer science degree to become a software engineer?
No, but it remains the most common and lowest-friction route. A four-year degree teaches algorithms, data structures and systems concepts that are expensive to learn on the job. Bootcamp graduates and self-taught engineers do get hired, especially by smaller companies, but usually need a strong portfolio or open-source work to substitute for the credential.
Is software engineering at risk from AI?
Parts of it already are. Tools built into modern code editors now write a large share of routine code — boilerplate, first-draft tests, translations between languages — for engineers who use them regularly. What is much harder to automate is deciding what to build, why, and how a system should be shaped so it survives contact with real users and failure.
How much do software engineers earn?
It varies enormously by country and company. In the United States the median is around $133,000 a year; in Germany roughly €69,000; in India, where the industry employs the most people, a national average is closer to ₹900,000. Senior and staff engineers at large technology companies can earn several times the national median once stock compensation is included.
What's the difference between a software engineer, a programmer and a developer?
In practice, little — the titles overlap and companies use them inconsistently. 'Programmer' is the oldest term and emphasises writing code; 'developer' is common in web and product companies; 'software engineer' leans on the idea of applying disciplined process, testing and design, borrowed from older engineering fields, to building software. Job descriptions rarely distinguish them consistently.
Is a coding interview really necessary to get hired?
At most established technology companies, yes: a live or take-home technical interview, often involving algorithm problems on a shared document or whiteboard, remains the standard filter, alongside a system-design round for more senior roles. Smaller companies and startups are more likely to substitute a paid trial project, a portfolio review, or a conversation about past work.