Sustainable Intensity: A Model for Work That Doesn't End in Burnout
For more than two decades as a software leader, I’ve seen the industry change constantly, but one thing remains true: the work will always outlast the hours in your day. With roughly eight hours for sleep, you have about sixteen hours to divide between work, personal life, and family. Some people thrive by interweaving those functions all day long, staying focused on whichever task is at hand. That approach doesn’t work for me. Instead, I’ve spent years refining a model based on clearly defined periods of intense work and complete disengagement.
I’m an intense person by nature. Whether the focus is my family, career, team, or learning, when I commit my energy to something, I go all-in. That level of focus is highly productive, but it’s not sustainable across all parts of life at the same time. I’m not a multitasker. What I’ve learned is that a healthy, long-term career doesn’t require a hundred hours a week—and it might not even require forty, depending on your circumstances. The key is to define your time, prioritize the work, and communicate those boundaries effectively.
From 100-Hour Weeks to a Smarter Balance
Fresh out of school, I fully embraced startup culture and pushed myself through weeks of 100 hours or more, including evenings and weekends. My work became my life; my social circle was made up of colleagues. Predictably, that pace took its toll. I hit a wall—my thinking became scattered, my analytical skills dulled, and the long hours of coding took a physical toll on my wrists. It got to the point where I could no longer type.
While recovering, I took a hard, honest look at how I was spending those hours. I wasn’t really working 100 hours a week. I was in a working headspace for that time, but I was wasting energy on low-priority tasks and social activities like foosball and gym sessions with coworkers. What I needed was more focus during work hours and more genuinely unplugged time to offset them.
So I experimented with a 9 am to 9 pm workday, Monday through Friday. The result surprised me: I got nearly the same amount of work done as I did in 100-hour weeks. I was roughly 80 to 90 percent as productive at 60 hours because I was prioritizing better and working smarter. The side effects were positive—I was happier, had solid non-work time to rest, and reclaimed my weekends. In 2009, I adjusted the model to 9 am to 6 pm, keeping the same intensity.
Defining the Current Model: Sprints and Recovery
I can’t mix work and family life; for me, work/life balance is binary. I’m either working with full engagement or not working at all. This concept aligns with an idea from Nassim Taleb’s Antifragile, which suggests focusing on sprinting and walking rather than jogging for building robust health. By sprinting and then resting, you cover a similar distance, but your body gets recovery time and adapts to the stress more effectively. I’ve applied that same principle to my career. When I do something, I commit to it with maximum energy per minute, which requires single-tasking rather than multitasking.
My current workday runs from 9 am to 6 pm, with an hour-long lunch break taken with my kids, who are home for virtual school. That midday break is a rare chance for weekday family time, and I’m taking full advantage of it. Beyond that, I’m protective of the boundary between work and non-work. My work hours are filled with collaborating, recruiting, writing, coding, pairing, and one-on-ones. My non-work hours are where I recharge. This structure works because of four core benefits.
Focused Intensity on What Matters
I work best in hard bursts. I deliberately avoid tackling things linearly as they come in, and I refuse to be a slave to my calendar. I defend my time by scheduling blocks for writing, planning, reviewing, and thinking. Without making that time, these essential tasks would bleed into my non-work hours, making it harder to unplug. If something doesn’t get done between 9 and 5, it likely wasn’t a high priority anyway.
Working in intense bursts also helps my problem-solving. Stepping away from obsession often unblocks me, and putting thinking time on my calendar stops the background processing from happening during my personal time. When I fully turn my brain to non-work activities, I often have my most creative ideas. This model is flexible—I can push hard outside core hours when necessary or take more personal time when needed—but the default schedule stays consistent.
Clear Signals for the Team
Having a defined time model sets predictable expectations for the people around me. Communication is the critical ingredient here; if you’re clear about your intentions and boundaries, people learn how you work. For example, my team knows from my sending patterns that I respond to most emails in bulk once a week. That approach keeps down the volume of inbound mail, and my replies come with real thought behind them. Similarly, my teammates know I may not respond to Slack messages instantly—but they know I’ll respond once I’ve had time to think
True Recharge and Presence
When I’m not in work mode, I’m fully present with my family. That means not carrying a mental load of work tasks or feeling guilty about unfinished items. I’ve found that when I go on vacation, it’s best to enter low-power mode and disconnect completely. For me, staying semi-connected to work hurts both me and my team in the long run, despite the good intentions. My team and I function best when we return from breaks recharged and ready to tackle issues from a productive angle.
I also protect my brain from work before bed by reading non-work material. This habit helps me sleep better and wake up ready to engage in those high-energy bursts. I can be present with my kids and wife after work because I know the next 9 am will bring a fresh start.
The Power of Prioritizing
There will always be enough tasks to keep working non-stop, and you will never do all of them. Limiting my work hours forces me to prioritize and let less important tasks fall off the list. If I didn’t get to something during my core hours, it wasn’t essential enough. That reckoning is the key to preventing burnout; I push harder in “on” periods and allow myself to truly recover in “off” ones.
This doesn’t mean ignoring work that’s important to teammates. If a request falls to the bottom of my personal list but is a key priority for someone else, I still need to communicate that. I can help connect them with another stakeholder, bring in an alternate resource, or find an asynchronous way to collaborate that respects everyone’s time and energy
Your Boundaries Aren't One-Size-Fits-All
The nine-to-six structure works for me, but it isn't a universal prescription. Lifestyles, external demands, and personal capacity for balancing work with everything else vary too much for any single model to be the "right" answer. At Shopify, the flexibility exists to set your own hours and design a working model that fits your situation.
The real priority is identifying when you need to be fully available for intense work and then explicitly marking the periods when you are not. That separation is what keeps your energy sustainable over the long haul, because it forces balance into the equation.
Your model doesn't need to look like anyone else's. It might not require 100 hours a week, or even 40. Whatever sustainable structure you land on, defend it fiercely and communicate your expectations clearly so others know when they can count on you — and when they can't.
Principles Outlive Schedules
I've operated this way for over two decades, across very different phases of life. The hours have shifted, but the underlying framework hasn't:
- Define the time box.
- Prioritize the intense work within it.
- Recharge deliberately afterward.
Farhan Thawar, VP Engineering, shared this approach in Shopify's Engineering blog. The company points readers interested in systems-level problem solving to its Engineering career page for open roles, including remote positions through its work-anywhere hiring initiative.
