How to Write a Career Description

Many roles ask for a detailed project write-up alongside your resume. If a resume is a "summary", a career description is "proof" — it breaks work down project by project to show, concretely, which problem you owned, in what role, what you did, and what result it drove. The point isn’t "listing tasks" but "problem → my contribution → result (numbers)".

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How to structure a career description

Organize by project
Instead of listing tasks in chronological order, group them into "projects/initiatives" and treat each as one case. Order them by relevance to the role you’re applying for.
Problem → contribution → result
Walk through each project in a STAR flow: "which problem (situation/task), what you did in what role (action), and what result it drove (impact/numbers)".
Make your own contribution clear
Separate "the team did it" from "I did it". A career description is where hiring managers judge what "you" can do.
Tech used · quantified results
Include each project’s tech stack and quantified results (metrics/numbers). Not "improved" but "X→Y".

Weak line → strong line (career description)

Instead of listing "participated / performed", write [project · dates · role] + problem→action→result (numbers), and it becomes proof.

Participated in a payment system development project and performed various tasks

[Payment system hardening · 2022.03–09 · Backend lead] Diagnosed a high payment failure rate and designed/built retry and idempotency handling, cutting failures 2.1%→0.4% (refund inquiries −30%/mo). Used: Java · Spring · Kafka

Why it’s better — Turns a "participated / performed" list into [project · dates · role] + problem→action→result (numbers) + tech.

Team launched a new feature

Owned the recommendation feature 0→1, leading model integration and A/B design; contributed to a 12pp lift in weekly return rate (sole backend on a team of 4)

Why it’s better — Narrows a team result down to your own contribution so "what I did" is clear.

Responsible for data analysis and report writing

Analyzed churn drivers to find a bottleneck at the checkout step, then proposed and validated a fix that lifted conversion by 6pp. Used: SQL · Python

Why it’s better — Connects "analysis / writing" into a find→propose→result (conversion) flow.

Common career-description mistakes

✕ Copying your resume verbatim — a career description is "detailed proof", so each project needs to go deeper.
✕ Only listing tasks in chronological order — restructure into projects + a problem→contribution→result flow.
✕ Not separating team results from your own contribution — be clear about what "you" did (recruiters judge your ability).
✕ No quantified results — add at least one number (X→Y) to each project.
✕ Cramming in every experience until it gets long — focus on the 3–5 most relevant projects and write them deeply.

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See a resume summary in winning resume examples, role-specific how-tos in the resume guides, and cover letters in how to write a cover letter. You can calculate your total experience (years/months) precisely with the career calculator.