CrackRobotics

The last frontier of automation is physical

For decades, computers have taken over work done at desks: calculating, filing, sending and, lately, writing and coding. Work done with hands is different. A program can't lift a box or tie rebar; it needs a body that can sense the world and move through it. That body is a robot. Here's the data on why that work is where robotics is headed, and what you'd learn to build it.

Software took the desk. The rest is physical

Think about who does the work in a warehouse, on a building site or on a farm. Most of it still means lifting, carrying, reaching and walking. In the US, 37.9 million people, about one job in five, work in the five most physical groups of occupations: transport and material moving, production, construction, installation and repair, and farming, fishing and forestry.1

The Bureau of Labor Statistics also rates every job by the strength it takes. Seven in ten need more than sitting at a desk, and more than a third need medium strength or more, such as lifting 26 to 50 pounds from time to time.2

US civilian jobs by the strength they require, 20252
  • Sedentary30.3%Mostly sitting, lifting little more than papers. Software developers, accountants.
  • Light33.7%Lifting 11–25 lb now and then, or standing for much of the day. Teachers, desk clerks.
  • Medium29.1%Lifting 26–50 lb now and then. Stockers and order fillers, mechanics, construction labourers.
  • Heavy6.2%Lifting 51–100 lb now and then. Butchers, aircraft mechanics, firefighters.
  • Very heavy0.7%Lifting over 100 lb now and then.

That's the frontier. McKinsey estimates that today's AI agents could, in principle, handle tasks that fill 44% of US work hours. For robots, the figure is 13%.3 Software can already reach a lot of desk work. Very little of the physical kind is within reach yet, because it needs robots that can see, grasp and move reliably in messy places, and those are still hard to build.

There aren't enough people to do it

Employers in physical industries say they can't find enough workers, and the numbers back them up. US manufacturers will need as many as 3.8 million new workers between 2024 and 2033, and 1.9 million of those jobs could go unfilled.4 Construction needs 349,000 net new workers in 2026 alone, most of them to replace people who are retiring.5

Farms show it most clearly. Many US farms rely on H-2A visas to bring in seasonal workers from abroad, and the number of H-2A positions has grown more than sevenfold since 2005. The USDA calls that one of the clearest signs of how scarce farm labour has become.6

Underneath it all is age. People are living longer and having fewer children, so each year fewer young people start work while more retire. Japan's working-age share of its population fell from 69.5% in 1995 to 59.6% in 2024,7 China's working-age population shrank by 6.62 million in 2025 alone,8 and South Korea's is projected to fall by more than half by 2072.9 In the US, the labour force is projected to grow just 0.3% a year over the next decade, down from 0.8% over the last.10

Signs of the shortage, in the US and beyond
IndicatorFigure
US manufacturing jobs that could go unfilled, 2024–20331.9 million4
Net new US construction workers needed in 2026349,0005
H-2A seasonal farmworker positions certified, fiscal 2005 → 2025about 48,000 → 398,2586,11
Average age of US farm producers, 202258.1 years12
New US home health and personal care aide jobs, 2025–35847,30013
US labour force growth per year, 2015–25 → 2025–350.8% → 0.3%10
Japan's working-age share of its population, 1995 → 202469.5% → 59.6%7
South Korea's working-age population, 2022 → 2072 (projected)36.74M → 16.58M9
EU population aged 20–64, 2025 → 2100 (projected)263.2M → 198.4M14

One caution: this isn't the hiring rush of 2022. US job openings have fallen back to about one per unemployed person, from two then.15,16 The shortage is slower than a busy job market, and it lasts longer, because it comes from who's left to do the work.

And the work is dangerous

Physical jobs are also where people get hurt. In 2024, 5,070 people died from injuries at work in the US, about one every 104 minutes. The groups with the most deaths were transportation and material moving workers, 1,391 of them, and construction and extraction workers, 1,032.17

The chart below ranks jobs by how likely a worker is to die in a year. Logging comes first: loggers die at 33 times the rate of the average worker.18

Fatal work injuries per 100,000 full-time workers, US, 202418
  1. Logging workers110.4
  2. Fishing and hunting workers88.8
  3. Roofers48.7
  4. Structural iron and steel workers37.8
  5. Refuse and recycling collectors37.4
  6. Aircraft pilots and flight engineers36.7
  7. Construction trades helpers35.8
  8. Underground mining operators35.6
  9. Truck drivers25.7
  10. Grounds maintenance workers20.9
  11. All workers3.3

Almost every job near the top means heavy loads, heights, machinery or long hours on the road. Injuries that don't kill add up too. The leading cause of injuries serious enough to mean time off or lighter duties is overexertion: lifting, pushing, pulling and repeating the same motion, with 946,290 cases over 2023 and 2024.19 That's exactly the kind of work robots are good at.

Warehouses report injuries at about twice the private-industry rate.20 Work injuries cost the US $181.4 billion in 2024,21 and worldwide the ILO estimates that 2.93 million people die each year from work-related accidents and diseases.22

Robots are arriving, but they're still rare

Factories have used robots for decades, mostly arms that weld, paint and move parts, bolted in place and repeating one job. They're spreading fast: factories installed more than 600,000 in 2025, and 5 million are now at work worldwide. The International Federation of Robotics expects 806,000 installations a year by 2029.23

Robots are leaving the factory, too. About 250,000 professional service robots, including the mobile robots that carry goods around warehouses, were sold in 2025, along with nearly 7,000 full-size humanoids.24 Money is following: investors put $15 billion into robotics startups in 2025, up from $8.2 billion in 2024, and $18.8 billion more in 2026 by late June.25,26

Industrial robots per 10,000 manufacturing employees, 202427
  1. South Korea1,220
  2. Singapore818
  3. Germany449
  4. Japan446
  5. Sweden377
  6. Denmark329
  7. Slovenia315
  8. United States307
  9. Chinese Taipei302
  10. Switzerland294
  11. European Union231
  12. China166
  13. World average132

Even so, robots are rare. South Korea, the most automated country, has about one robot for every eight factory workers, and the world average is one for every 76.27 The limit isn't the hardware so much as the engineering: every robot has to be set up and programmed to do its job reliably, and the IFR says easier programming and integration are what's bringing costs down.23

What robotics engineers actually do

A robot arm out of the box doesn't know where the part is, how to reach it without hitting anything, or when its grip has slipped. Robotics engineers write the software that works those things out, and most of it comes down to a handful of problems. Each has a lesson here:

Kinematics
Where is the gripper, given the joint angles? And which angles put it where you want it? Pick & Place
Control
Turning a target into motor commands that reach it, despite weight, lag and friction. Jacobians & Velocity Control
Trajectories
Moving smoothly over time, within what the motors can do. Trajectory Generation
Motion planning
Finding a path from here to there that doesn't hit anything. Motion Planning
Perception
Finding objects in camera images, and working out where they are in 3D. Seeing with a Camera
Estimation
Combining noisy sensor readings into a best guess of what's really there. Noisy Sensors & Kalman Filters
Learning
Training behaviour from examples or trial and error, instead of writing it by hand. Learning Algorithms

“Robotics engineer” isn't one job title. The work is done by mechanical, electrical and software engineers and technicians, and it pays well: the median US mechanical engineer earns $104,110 a year and the median software developer $135,980, against $50,980 across all jobs. Both are projected to grow about three times as fast as jobs overall.28,29,1

Where to start

You don't need a robot. Every lesson on CrackRobotics runs a physics simulation of a robot arm in your browser, using MuJoCo, the engine behind a great deal of robot-learning research. You write Python that drives it, and you pass a step when the robot actually does the job. The first lesson, Pick & Place, is free in full, takes about an hour, and needs no robotics background.

Start Pick & Place, freeSee all lessons

Sources

  1. 1US Bureau of Labor Statistics, Employment by major occupational group, 2025, August 2026.
  2. 2US Bureau of Labor Statistics, Occupational Requirements Survey: strength, 2025, January 2026.
  3. 3McKinsey Global Institute, Agents, robots, and us: skill partnerships in the age of AI, November 2025.
  4. 4The Manufacturing Institute and Deloitte, Manufacturers need as many as 3.8 million new employees by 2033, April 2024.
  5. 5Associated Builders and Contractors, Construction industry must attract 349,000 workers in 2026, January 2026.
  6. 6USDA Economic Research Service, Farm labor, November 2025.
  7. 7Statistics Bureau of Japan, Statistical Handbook of Japan 2026, 2026.
  8. 8National Bureau of Statistics of China, Statistical communiqué on the 2025 national economic and social development, February 2026.
  9. 9Statistics Korea, Population projections for Korea, 2022–2072, December 2023.
  10. 10US Bureau of Labor Statistics, Civilian labor force summary, 2025–35 projections, August 2026.
  11. 11US Department of Labor, H-2A temporary agricultural program, selected statistics, fiscal year 2025, September 2025.
  12. 12USDA National Agricultural Statistics Service, 2022 Census of Agriculture highlights: farm producers, February 2024.
  13. 13US Bureau of Labor Statistics, Occupational Outlook Handbook: home health and personal care aides, August 2026.
  14. 14Eurostat, Population projections in the EU, 2026.
  15. 15US Bureau of Labor Statistics, Job Openings and Labor Turnover, August 2026, September 2026.
  16. 16US Bureau of Labor Statistics, The Employment Situation, August 2026, September 2026.
  17. 17US Bureau of Labor Statistics, National Census of Fatal Occupational Injuries in 2024, February 2026.
  18. 18US Bureau of Labor Statistics, Rate and number of fatal work injuries in selected occupations, 2024, February 2026.
  19. 19US Bureau of Labor Statistics, Employer-reported workplace injuries and illnesses, 2023–2024, January 2026.
  20. 20US Bureau of Labor Statistics, Incidence rates of nonfatal occupational injuries and illnesses by industry, 2024, January 2026.
  21. 21National Safety Council, Injury Facts: work injury costs, 2024, 2026.
  22. 22International Labour Organization, A call for safer and healthier working environments, November 2023.
  23. 23International Federation of Robotics, World Robotics 2026: five million robots now operate in factories globally, September 2026.
  24. 24International Federation of Robotics, World Robotics 2026 press conference slides, September 2026.
  25. 25Crunchbase News, Robotics funding in 2024 and 2025, February 2026.
  26. 26Crunchbase News, Robotics startup funding in 2026 so far, June 2026.
  27. 27International Federation of Robotics, Robot density surges in Europe, Asia and Americas (2024 data), April 2026.
  28. 28US Bureau of Labor Statistics, Occupational Outlook Handbook: mechanical engineers, 2026.
  29. 29US Bureau of Labor Statistics, Occupational Outlook Handbook: software developers, 2026.