Corestack Digital: Engineering Confidence in the Cloud

Founded in 2018, Corestack Digital operates from a converted textile mill in Leeds's Holbeck district, a neighbourhood that has become an unlikely cradle for technology firms drawn to its affordable space, good transport links, and proximity to the city centre. The company was started by three former enterprise architects who had grown tired of watching large consultancies overpromise and underdeliver on digital transformation projects. Their founding conviction was simple: smaller, technically excellent teams could outperform the bloated delivery squads that had become the norm in the industry.

Six years on, Corestack Digital employs around 85 people and works primarily with mid-sized organisations across financial services, logistics, and the public sector. The company's core offering sits at the intersection of cloud infrastructure, platform engineering, and custom software development. In practice, this means helping clients migrate legacy systems to AWS or Azure, designing resilient microservice architectures, and building internal tools that replace spreadsheets and manual processes with something more dependable.

A Consultancy That Builds Things

What sets Corestack Digital apart from many consultancies is its insistence on writing and shipping production code. The company does not trade in slide decks or theoretical architectures. Every engagement involves engineers embedded in the client's environment, working alongside their teams, writing code that will run in production. This approach has earned the company a reputation for pragmatism, and it is one reason why its client retention rate is unusually high for a firm of its size.

"We measure ourselves by what's running in production six months after we leave, not by what we present in a steering committee," says Rachel Okonkwo, one of the company's co-founders and its current CTO. "If the thing we built falls over the moment we walk out the door, we've failed, no matter how elegant the design was."

This production-first mindset shapes everything from hiring to project planning. Engineers at Corestack Digital are expected to think about operability from day one: logging, monitoring, alerting, graceful degradation. The company runs internal "chaos mornings" every other Friday, where teams deliberately introduce failures into staging environments to test their assumptions. It is not glamorous work, but it produces software that clients can trust.

The Leeds Advantage

Corestack Digital is firmly rooted in Leeds and has no plans to relocate to London. The founders believe that the city offers a deep and underappreciated talent pool, fed by strong computer science programmes at the University of Leeds and Leeds Beckett University, as well as a growing community of experienced engineers who have chosen northern England over the capital for quality-of-life reasons. The company sponsors several local meetups, including the Leeds Cloud Native group and a monthly DevOps breakfast, and it regularly hosts open evenings at its Holbeck office.

The office itself reflects the company's culture: functional, unpretentious, and designed for focused work. There are no ping-pong tables or neon signs. Instead, the space features generous desks, good monitors, a well-stocked kitchen, and a series of small meeting rooms named after Yorkshire peaks. Engineers work a hybrid schedule, typically spending two or three days a week in the office, with the rest remote. Client site visits are expected but not constant, and the company covers travel expenses without fuss.

Technical Culture and Growth

Corestack Digital invests heavily in the technical development of its people. Every engineer receives a personal learning budget and is given dedicated time each month for exploration, whether that means earning a cloud certification, contributing to an open-source project, or experimenting with a new language. The company maintains an internal knowledge base that functions as a living technical manual, and engineers are encouraged to write up lessons learned from every engagement.

Promotion at Corestack Digital follows two tracks: a technical leadership path for those who want to deepen their expertise and influence architecture decisions, and a delivery leadership path for those drawn to managing teams and client relationships. Neither track is considered superior, and movement between them is possible. The company has been deliberate about avoiding a culture where management is the only route to higher compensation.

Values in Practice

The company's internal values are stated plainly: be honest about what you know and what you don't, leave systems better than you found them, and treat the client's infrastructure as if your own reputation depends on it, because it does. These are not slogans printed on the wall. They inform real decisions, such as the company's policy of turning down work that falls outside its competence rather than learning on the client's dime.

Corestack Digital is not trying to become the next global technology powerhouse. Its ambitions are more grounded: to be the most trusted cloud and software engineering consultancy in the North of England, to provide meaningful and well-compensated work for its engineers, and to build things that last. For a company in an industry often defined by hype cycles and vanity metrics, that restraint is itself a kind of statement.

Looking Ahead

The company's current focus areas include platform engineering, infrastructure-as-code maturity, and helping organisations adopt internal developer platforms without over-engineering the solution. There is also growing demand from clients for data pipeline work and event-driven architectures, areas where Corestack Digital is steadily expanding its capabilities. With several long-term contracts secured through 2026, the company is hiring selectively, looking for engineers who share its belief that the best technology work is often invisible to the end user, quietly reliable, and built to endure.