Start before you need anything
The worst time to build a network is when you are unemployed, because every conversation carries an unmistakable urgency and people can feel it.
The alternative is to treat it as ordinary professional maintenance. Stay in touch with former colleagues. Keep up with people from courses and conferences. Reply to things. None of this requires a strategy; it requires not letting relationships lapse entirely.
The practical version is small: a handful of messages a month to people you have not spoken to in a while, with no ask attached. That is enough to keep a network alive.
Pay attention to weak ties
The counterintuitive finding, repeatedly confirmed in research on how people actually find jobs, is that opportunities come disproportionately from acquaintances rather than close contacts.
The reason is structural. Your close circle knows what you know and knows the same people. Someone you met once at a conference sits in a completely different information network, and is therefore far more likely to know about something you have not heard of.
This means the loose contacts you have half-forgotten are worth more than they feel. A message to someone you worked with four years ago is not awkward; it is the highest-yield thing in the whole practice.
Give before you ask
The fastest way to build genuine goodwill is to be useful without an immediate expectation of return.
Make an introduction between two people who should know each other. Send an article that is actually relevant to a problem someone mentioned. Answer a question properly when someone posts one publicly. Recommend someone for work. Give feedback when asked, and give it seriously.
None of this is transactional bookkeeping. It works because people remember who was helpful, and because being useful is a more pleasant way to spend your professional life than accumulating favours.
Make requests easy to answer
The most common reason a networking message goes unanswered is that answering it would take too much work.
"Do you know of any jobs?" requires the recipient to survey everything they know, guess what you want, and construct a response. "I am looking at product roles at fintech companies in Amsterdam — do you know anyone there I could speak to?" can be answered in one line.
Be specific about what you want, keep the message short, and make refusal easy. "No pressure at all if nothing comes to mind" genuinely increases response rates, because it removes the social cost of saying no.
Use online networks properly
Online platforms are useful for maintaining reach and terrible as a substitute for actual relationships.
What works: keeping your profile current, sharing things you have genuinely learned, commenting substantively on other people's work, and using it to find the right person to contact. What does not work: connection requests with no message, immediate pitches to new connections, and engagement-farming posts.
When you send a connection request, add one line explaining the context. It roughly doubles acceptance and it means the person remembers who you are when it matters.
Have conversations, not interrogations
Informational conversations are the most underused tool available to job hunters, and they work because most people enjoy talking about their own path.
Ask how they got into the field, what surprised them, what they would do differently, where they think things are heading. Listen more than you talk. Take notes.
Do not pivot into asking for a job. It converts a genuine exchange into a bait and switch and people notice immediately. If a role comes up, they will raise it. What you want from the conversation is context, judgement and a relationship — the opportunity, if it comes, comes later.
Follow up and close the loop
The step almost everyone skips is the one that compounds. Send a thank-you within a day. Then, weeks or months later, tell them what happened.
"You suggested I look at the operations side rather than analytics — I did, and I have just started a role doing exactly that. Thank you, it was the right steer."
That message costs two minutes and it does two things: it tells someone their advice mattered, and it puts you back in their mind as someone who follows through. People help that person again.