Product Developer, Decisio.circularity

The problem you will help solve

Every home, school and business sends its wastewater to a treatment works. Cleaning that water leaves behind a solid by-product, known in the industry as sewage sludge or, more positively, bioresources. It does not just disappear. It has to be collected, moved, treated and put to good use, and that turns out to be one of the most interesting planning problems in UK infrastructure.

Picture many treatment sites, each producing material every day. Fleets of tankers move it across the region. Treatment centres with limited capacity turn it into renewable energy through anaerobic digestion. Storage fills up. Breakdowns, weather and farming seasons change what is possible from one day to the next. The treated end product goes back to farmland as fertiliser. Planners juggle all of this, often with spreadsheets and hard-won experience. Better decisions mean lower costs, lower carbon and a more circular economy.

If you are drawn to logistics, scheduling, supply chains or optimisation, this is that problem with a real environmental purpose.

About us

We build Decisio™, a decision intelligence platform for utilities and critical infrastructure. Decisio helps teams make the right decision, in the right place, at the right time, by combining data, mathematical models and optimisation in software that planners use every day. Decisio.circularity is our product family for bioresources, covering long-term strategy, capital investment planning and day-to-day operations.

The role

This is a product developer role. You will design, build, test and improve software features in Decisio.circularity, working in a small product team alongside domain experts, data specialists and developers.

Our bioresources team is strong on long-term strategic planning: where to invest, what capacity to build, and how the network should look in ten or twenty years. We now want to grow our operational product, the tools planners use to decide what happens this week, tomorrow and today. That calls for different thinking, so we are looking for someone who brings fresh ideas, new skills and a perspective from outside the water industry.

You do not need to know anything about wastewater. We will teach you the domain. What matters is that you enjoy turning a messy real-world process into clear, useful software.

What you will do

• Join workshops with water company planners to understand how they plan today, where the pain points are and which decisions matter most.

• Turn what you learn into user journeys, requirements and product designs.

• Build and test product features across the full development lifecycle, from first prototype to live release.

• Develop mathematical and optimisation models that represent material flows, tanker logistics, treatment capacity and storage.

• Design and query the SQL data models that sit underneath each product.

• Use AI-assisted development tools to prototype quickly and automate repetitive workflows.

• Help users adopt new tools and ways of working, keeping people in control: Decisio supports decisions, and planners own the outcome.

What you will bring

This is an early-career role. We are looking for potential and curiosity as much as experience.

Essential

• A degree, or equivalent experience, in a numerate or technical subject such as engineering, computer science, mathematics, operational research, data science, physics or logistics.

• Hands-on experience building software through work, study or personal projects (for example in Python, JavaScript or similar).

• Working knowledge of SQL and relational databases, or a clear ability to pick them up quickly.

• An interest in mathematical modelling and optimisation, and in using them to solve practical problems.

• The ability to listen to users, understand how they work and turn that into something you can build.

• Clear communication, and a willingness to spend time with clients as well as with code.

Desirable

• Experience with optimisation techniques such as linear or mixed-integer programming, or with scheduling and routing problems.

• Front-end development experience, or experience using AI-assisted coding and automation tools.

• Exposure to logistics, supply chain, transport or operational planning in any sector.

• Knowledge of the water, waste or energy sectors (helpful, but not expected).

Where you might be coming from

We would especially like to hear from people with a background in logistics and supply chain planning, transport and fleet scheduling, operational research, data science, software development, manufacturing or production planning, or energy systems. If you can see how your experience applies to this problem, we want to hear from you.

What we offer

• A hands-on product development role with real ownership, shaping a product used in critical national infrastructure.

• Work that makes a visible difference to circular economy and net zero outcomes.

• Full training in the water and bioresources sector, and a clear career path.

• A collaborative, multidisciplinary team combining operational, mathematical and software expertise.

• Flexible hybrid working and a competitive benefits package.

How to apply

Send your CV and a short covering note to careers@businessmodelling.com with the email title “Product Developer, Decisio.circularity, [Your Name]”. In your note, tell us what drew you to the role and give one example of a problem you have modelled, automated or built software to solve.

BMA is committed to equal opportunities and welcomes applications from all suitably qualified candidates.