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Software & AI · Data & analytics

Knowledge Graph Engineer: salary vs freelance rates

Model and connect structured knowledge so teams can inspect relationships and provenance. Manage identifiers, schema decisions, and conflicting claims rather than assuming a linked graph makes every source reliable or current.

U.S. employee wage reference

$139,500 / year

Database Architects · May 2025 national median

Illustrative freelance rate

$145.42 / hour

To replace this wage plus $15K benefits, with 1,200 billable hours/year, $20K business costs, and no percentage fees. Before personal taxes.

The wage is for the named occupation; the hourly rate is a planning calculation, not a surveyed freelance price for this specialty. Adjust the assumptions below.

Calculate my freelance rate →

Working in this sector

Use local prototypes, mock tools, public or synthetic data, and licensed research materials for practice; real data access, consequential automation, security testing, and deployment decisions require authorization and appropriate review.

Skills that make the work valuable

  • Knowledge schema design
  • Entity reconciliation
  • Graph provenance modeling
  • Graph quality validation

Build proof, not just a list

Create a small graph from public nonpersonal reference data with source links and conflicting claims. Demonstrate entity matching and explain unresolved ambiguity to a reader.

How to price this work as a freelancer

Define entities, relationship types, source permissions, reconciliation rules, update needs, and acceptance artifacts before pricing graph development. Agree the inputs, deliverable, review rounds, and acceptance criteria before quoting. Include preparation, specialist review, equipment or licensing costs, and handover time where relevant. Price ongoing support separately from the initial engagement.

Start with the income you need to replace

Required hourly rate = (target salary + benefits budget + annual business expenses) ÷ (annual billable hours × share of revenue retained after fees).

For illustration, $100/hour × 25 billable hours/week × 48 working weeks = $120,000 revenue. After $20,000 in business expenses, that leaves $100,000 profit before personal taxes. Replacing a $100,000 salary plus $15,000 in benefits under those assumptions takes $112.50/hour, with no percentage fees.

These are editable planning assumptions, not rates surveyed for knowledge graph engineer work. Your personal taxes, location, contract terms, and workload still affect the comparison.

Employee or freelancer?

Working as an employee

Employment can provide product context, code review, authorized datasets, shared infrastructure, and teams responsible for evaluating and operating software over time. Compare the actual role scope, supervision, benefits, working hours, and access to tools with the cited occupation reference.

Running a freelance business

Independent work can focus on bounded prototypes, integrations, evaluations, tooling, or research support when permissions, acceptance criteria, resource costs, and post-delivery ownership are explicit. For this specialty: Define entities, relationship types, source permissions, reconciliation rules, update needs, and acceptance artifacts before pricing graph development.

Where this career could take you

  1. 01Relevant education and supervised practice
  2. 02Knowledge Graph Engineer
  3. 03Software & AI practice lead or independent specialist

An example path, with room for lateral moves or specialization. Progression depends on opportunities and demonstrated work; these steps do not imply a timetable or salary increase.

Try one small next step

Link two public reference datasets and explain one entity match that cannot be justified confidently.