Blog

Opencast devs rise to the Scala challenge

Software Development

UK government departments are using Scala developers to help them deliver the transformational change they need. The experience of our people shows that not having Scala in your skillset is no major obstacle if you’re a great developer able to learn along the way, says Julian Blake.

Back in 2018, not long after joining Opencast as a senior consultant, Andy Chilton was asked to join the team helping Her Majesty’s Revenue and Customs (HMRC) to revamp a key public-facing digital service. As with much of its digital work, HMRC was using Scala to build and deliver the service.

HMRC invited Andy to lead the Opencast team contributing to the project, led by an HMRC product manager. The challenge that Andy faced was he had had no direct experience of using Scala. 

But Andy was far from a beginner, bringing over 15 years of software engineering and programming experience to Opencast, working on cloud and web solutions for big corporates and consultancies. He arrived with extensive programming experience – including Java, Ruby, CSS and SQL – with additional expertise across agile/scrum, leadership and project management. 

the Scala logo

No major hurdle

This broad experience meant Andy was well positioned to help meet many of the challenges of the project. Addressing its large service-based architecture and complex user journeys would draw on his wider expertise.

Not having Scala in his specific skillset at that point was no major hurdle. “Given that I did not have a Scala background, the new project was challenging,” Andy says. “But I saw it as an opportunity to better the service and welcomed the role with open arms.

“One of the first things I did was to help address some outstanding coding issues and look to better the service’s error-handling capability. As a result, we learned a great deal about the types of issues our users were experiencing and used the enhanced logging to retrospectively fix them.

“The result was that the service became much more robust, easier to work with and provided a better journey and experience for users.”

Learning and collaborating

By using his expertise, learning from Opencast colleagues and collaborating with other project members, Andy was able to learn Scala along the way. He used the language’s constructs and patterns to help improve the HMRC service in terms of readability, maintainability and extensibility. 

“We helped break up the monolith, adding any new logic as a new integrated front end in the micro service architecture, thus reducing the complexity of the service,” he explains. “The work met GDS standards and a live assessment and became an exemplar service. All this of course was with the help of a fantastic team.”

Another OC developer, Jack Heslop, also found himself at HMRC with no prior Scala knowledge. He arrived at Opencast as a graduate developer with intern experience in big corporates. 

“I really had to push myself to get up to speed as quickly as I could and become a valued member of the team,” Jack recalls. “I was also able to learn more about Scala at the same time. We had great feedback from both the team and product owner”.

Since moving to a team working on another HMRC project, Jack has used Scala in developing a feature to help service users see their information more clearly, as well as tackle outstanding bugs and technical debt, ahead of having the service ready for handover.

Challenge finding Scala devs

Of the major programming languages out there, Scala is used by relatively small numbers of developers and organisations worldwide. Compared to Python which is used by 52%, and Java used by 49%, Scala is used by just 3%, with 2% of organisations planning to adopt or migrate to it in the next 12 months.

Given the relatively low use of Scala globally, it’s unsurprising that there are relatively few developers out there who are specifically skilled in using it – which would explain the challenges that some have in finding lead Scala devs

As its name suggests, Scala is about scale and language – it is designed to grow with the demands of its users. Its usage ranges from writing small scripts to building massive systems, and is used primarily in data processing, distributed computing and web development – and it powers the data engineering infrastructure of many organisations.

Those wanting to understand Scala better can attend conferences like Scalabase, a super-practical workshop event featuring experts from the Scala community. An open source foundation, The Scala Center, was established by Scala itself to help developers learn the language through online courses and seminars.

Capacity to grow

Within Opencast, developers are taken through a four-stage process for training in Scala as the company builds its capacity overall to respond to client needs. Today the company is one of the biggest providers of Scala developers in the North East region.

UK government departments including HMRC and also the Home Office want Scala developers, and Opencast has included them in teams working on their projects.

Tam Mageean, a senior OC scrum master with years of experience working on government digital projects, explains the Scala attraction. “From an operational perspective, the big appeal for standardisation of Scala/functional programming for government departments is that it allows them to operate on a mostly micro service architecture approach to building their services. 

“This makes the services more maintainable, supportable and reusable overall, due to them all being built of mostly the same things and in similar ways. This also allows people to move from team to team more fluidly and even allow services to move from centre to centre with relatively less onboarding needed.”

Opencast’s developers are helping to deliver great work for several UK government partners. They may use technologies like Scala, but because we support our people in their learning and development, not having Scala in their skillset at the outset has not proved an insurmountable hurdle to us helping to deliver great results.

If developers arrive at Opencast with valuable experience and knowledge of agile and XP practices, with the right level of training alongside on-the-job experience, there is almost always capacity for them to grow.

Opencast is deploying up to 30 people into new Scala roles in 2022. For more information, check out our careers page.

Related Content

Blog post

Abstract blue light trails converging into a single point, representing data flow and system integration.
How DevOps Evolved and Why It Became Confusing

In this blog, Opencast Practice Lead Scott McCarthy explores how DevOps has evolved from a response to the challenges of modern software delivery into a widely adopted approach. Drawing on experience working with complex delivery teams, he reflects on how the original intent of DevOps has sometimes become less clear as organisations focus on tools and structures alongside culture and outcomes. This is Part One of a two-part series, focusing on how DevOps emerged, why it can be perceived as confusing, and where organisations commonly face challenges when putting it into practice.

Product & Delivery

|

IT Architecture

Headshot of a person with glasses and a short beard, wearing a dark top with red detail, standing indoors against a white door.

Read more

Blog post

A group of people sit around a long conference table in a modern office, listening to a seated speaker with a laptop open in front of them. Cups, water bottles, and a headset are on the table, and posters and windows are visible on the walls behind.
The Evolving Role of the Delivery Manager in the Age of AI

In this blog, Darren Horobets-Farley, Senior Agile Delivery Manager, explores the evolving role of the Delivery Manager in an increasingly AI-driven world. As Artificial Intelligence (AI) becomes more deeply embedded in software delivery, many traditional delivery tasks are increasingly being supported and enhanced through automation and AI. Darren explores what this shift means for Delivery Managers, where AI can genuinely add value, and why human leadership, judgement, communication and trust remain essential to successful delivery teams.   

Data & AI

|

Product & Delivery

Image of Darren Horobets-Farley, wearing a blue t-shirt with an Opencast logo, standing in a brightly coloured office corridor with red, green and blue doors in the background.

Read more

Blog post

A person stands at a clear lectern on a stage, speaking into a microphone while holding a small handheld device. A large screen to the left displays partially visible presentation text. The setting is lit with blue stage lighting, and the speaker wears a light button-up shirt and a lanyard with a name badge.
From uncertain to effective: How consultants should handle ambiguity

In this blog, Luke Ryan, Client Relationship Director at Opencast, shares practical guidance for consultants stepping into new public sector engagements where information is incomplete, context is sparse, and objectives are still forming. From stakeholder mapping to RAID logs, Luke outlines the tools needed to reduce ambiguity, build credibility, and demonstrate value from day one.

Product & Delivery

Client Relationship Director

Read more

© Opencast 2026

Registered in England and Wales

© Opencast 2026

Registered in England and Wales

© Opencast 2026

Registered in England and Wales

Who we are

What we do

Who we work with

What we think

Join our team