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Location: London

Salary band: £56,877 – £71,229

Role: Permanent, full-time


About you

You’re a Product Manager who thrives at the intersection of strategy and execution. You care deeply about shipping well-defined, high-quality features, not just managing a backlog. You’re comfortable getting into the weeds with engineers, writing detailed specifications, and ensuring that what ships genuinely meets the bar. You take pride in closing the gap between “good enough” and “done.”


We value ownership, accountability, a bias to action, and have a culture of feedback. As such, you should be a high-agency individual with self-awareness who wants TransitionZero to win. In addition to seeking out people with a proactive, problem-solving attitude and an eye for detail, as an evolving organisation, collegiality and empathy for our coworkers is a requisite.


As a growing tech startup operating in the climate and energy space, the landscape is always evolving around us. To be successful you need to have a high degree of adaptability and willingness to approach challenges with creativity and curiosity. Essentially you need to embrace change and be able to stay focused on our long-term mission while delivering value incrementally, so we can build towards our future.


About the role

We’re looking for a Product Manager to own the product lifecycle for our Interface team, the team responsible for building the user-facing features of Scenario Builder, our flagship energy system modelling tool.


Scenario Builder enables policymakers, planners, and investors to rapidly build, analyse, and share energy system models without coding expertise. This role puts you at the heart of how that product takes shape: translating high-level product direction into detailed, executable specifications, running agile ceremonies, conducting user research, and ensuring every feature that ships meets a clear definition of done.


You’ll work closely with the Head of Product, a Principal Engineer, and a Product Designer to ensure the team builds the right thing, builds it well, and communicates it effectively. This is a hands-on, embedded role.


Responsibilities


Product specification and delivery

  • Write product requirements documents (PRDs) with clear acceptance criteria that engineering can confidently build and test against
  • Own the definition of done for every feature, ensuring nothing ships until it genuinely meets the bar
  • Conduct exploratory and user research to validate product direction and inform prioritisation
  • Manage the product backlog, ensuring work is well-scoped and sequenced for sprint planning
  • Run the Interface team’s agile ceremonies: daily standup, sprint planning, sprint review and retro, and a weekly refinement session


Communication and coordination

  • Own product marketing for Scenario Builder: identify the key headline for each release, draft compelling newsletter content and social posts, and coordinate with the marketing team to bring features to life
  • Produce and maintain user-facing product documentation, including the Scenario Builder pages on the marketing site and docs site
  • Run a fortnightly product and marketing sync to keep communications aligned with the delivery roadmap
  • Act as the connective tissue between product leadership, engineering, design, and marketing - so that each function has what it needs to do its best work
  • Maintain a log of user-requested features and proactively notify users when their requests ship


Skills and experience


Essential

  • Demonstrable experience as a product manager working closely with engineers in a small team environment.
  • Strong agile and scrum experience - story pointing, backlog management, running ceremonies that are genuinely useful.
  • Excellent written communication, you can write PRDs, acceptance criteria, and documentation that are clear, precise, and actionable.
  • Experience working on a user-facing product with a front-end.
  • User research capability. The ability to run discovery work that validates product direction.


Desirable

  • Understanding of energy systems, energy modelling.
  • Familiarity with data visualisation of complex data as a product domain.
  • Product marketing awareness. The ability to articulate features in terms that resonate with users and stakeholders
  • Experience working in a non-profit, mission-driven, or early-stage startup environment


About us

TransitionZero is a climate tech non-profit founded in 2021. TransitionZero builds software to reduce the time to build clean energy at scale. We pioneer open-access and open-source tools that make electricity system modelling more transparent, accessible, and actionable for governments, financiers and grid operators worldwide.


Our flagship tool, Scenario Builder, enables policymakers, planners and investors to rapidly build, analyse and share energy system and electricity grid models without coding expertise or external consultants. Supported by model-ready datasets, training and market insights, our tools strengthen in-house capacity and support resilient, affordable and locally-led energy transitions.


At TransitionZero, we understand that diversity is an essential component of a successful team, whether that be diverse ways of thinking, personal or professional backgrounds, or skills. We aim to be the most talented non-profit in our vertical through our culture of ownership and adaptability.


Benefits

  • Enhanced competitive pension scheme - auto-enrollment from day 1
  • 25 days annual leave (excluding UK public holidays) and an additional discretionary days off such as over the festive period
  • 20 days of annual allowance to work from anywhere in the world
  • Hybrid working and core working hours model
  • Allowance to set up your home office
  • Annual budget and dedicated leave time for relevant training courses
  • Enhanced gender-neutral parental leave (16 weeks fully paid)
  • Private healthcare following the successful completion of the probation period
  • Yearly team offsites


Our commitment to diversity, equity, and inclusion

Studies have shown that some people from marginalised or underrepresented groups are less likely to apply to a role unless they meet all of the hiring guidelines or qualifications. Whoever you are, even if you don't meet all of the criteria, if you can demonstrate a variety of skills and experience relevant to this role, we encourage you to apply as you might just be the candidate we hire! At TransitionZero, we're looking for people who are genuinely passionate about what they do, and we welcome all people, regardless of their background.

If you would like to discuss any reasonable adjustments to the application or hiring process that may better facilitate your participation, please contact our People Team (people@transitionzero.org) for an informal chat. We will make every effort to respond to your request for assistance as soon as possible.