HM Treasury
Lead Data Engineer
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This post can be based in London (1 Horse Guards Road) or Darlington (Feethams House).
Job Summary
If you’re interested in making a difference to people’s lives, the Treasury can offer you an exciting opportunity to influence decision making that affects the whole of the UK. Working at the heart of government, we collaborate across government to promote responsible public spending and drive strong and sustainable economic growth.
Our work ranges from protecting customers through the regulation of the financial sector, helping to reduce carbon emissions and creating a greener economy, to promoting British trade around the world and supporting people across the country on jobs, growth and more.
We are part of the Darlington Economic Campus, a cross-government hub bringing people together to tackle key national issues while working closer to the communities we serve.
Job Description
As a lead data engineer, you will work on a variety of data engineering projects, maintaining and developing them in response to user feedback. These products are used by a wide variety of HMT staff: improving them will increase productivity across the department. You will also work in a team of data professionals, supporting HMT through a wide portfolio of projects, and hold relationships with customers within HMT and beyond.
Key Accountabilities Of This Role Include:
- You will be acquiring data sets from multiple sources at varying levels of maturity. You will have a demonstrable understanding of how to expose data from systems (e.g. from APIs), link data from multiple systems, and deliver streaming services. You will collaborate with others to identify and plan these services, and to review specifications.
- You will maintain and develop data products used internally and in line with HMT’s data strategy. You will leverage your expertise in Python and cloud systems to achieve this. You will ensure the products run reliably and react to any issues rapidly.
- You can produce data models and understand where to use different types of data models. You have experience of a wide range of data engineering tools. You understand industry-recognised data-modelling patterns, how to establish and use agreed standards and tools, design, code, and test programs and scripts for data engineering. You can develop resilient, scalable, and future-proof services to meet user needs.
- You will actively scope and carry out other projects including web app development and data engineering. You will explore opportunities to work innovatively, recognising, identifying and exploiting opportunities to ensure efficient and effective performance of the organisation, and to support and enable that you will influence the data architecture in place. You can explore new ways of conducting business and organisational processes.
- You will promote best practice in data engineering including acquisition, storage and sharing of data for the benefit of modelling and policy development, working with the Hub to provide overall technical leadership and development opportunities across HMT in data and data science.
- You will contribute to the growth of the Data Hub through sharing work, pair programming, contributing process ideas.
Essential Criteria:
- Strong experience using Python for data engineering and web app development
- Expertise in SQL
- Considerable experience at least one major Cloud provider (Azure is preferred, however Google Cloud or AWS are acceptable)
- Experience successfully implementing a product and managing customer relationships, acting on feedback and other good product management practices
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Desirable Criteria:
- Experience making pipelines and data warehousing with Microsoft Fabric
- Experience making apps with Plotly Dash, Streamlit and/or Chainlit
- Experience using LLM and Embedding APIs, with a strong understanding of how both work
Candidate Drop-In Session
The hiring manager will be running a candidate drop-in session to give you greater insight about the role and HM Treasury and ask any questions you might have.
If you would like to join us, use the link below to join the call at the right time.
Date & time: Wednesday 29th July and 5th August, 4-5pm.
Join the meeting: https://teams.microsoft.com/meet/399558196117029?p=inFy0a53sFBYqONH9J
Meeting ID: 399 558 196 117 029
Passcode: Dn69LE6P
If you would like to speak to the hiring manager informally prior to the closing date, please contact Molly Adamat at molly.adamat@hmtreasury.gov.uk
You may also be interested in a similar role within our department - Lead Software Developer. For further details, please see the advert at Lead Software Developer - Civil Service Jobs - GOV.UK
Visa sponsorship is not available for either of these roles.
Person specification
Application Stage
Application Form
Applications should consist of a CV including your employment history, and a 1000-word personal statement setting out how you meet the shortlisting criteria below. Your CV and employment history won’t be scored. It’s used to give context to your application and support discussions at interview.
The panel will review applications and invite those that best demonstrate evidence of the shortlisting criteria for interview. Please keep this in mind when writing your application.
Please note that only applications submitted through Civil Service Jobs will be accepted.
Essential Criteria (application Stage)
- Proven experience designing and building robust back‑end systems, such as data pipelines, services or orchestration layers, that are scalable, secure and maintainable.
- Demonstrable experience applying technical governance and controls to complex systems, including areas such as logging, monitoring, auditability, access management and safe interaction with data.
- Strong ability to translate organisational or user needs into effective technical solutions, working collaboratively with colleagues from non‑technical backgrounds such as policy, analytical or operational teams.
- Ability to provide credible technical leadership and advice, including explaining complex concepts clearly, promoting good engineering practice, and supporting others to adopt solutions safely and confidently.
Interview Stage
Behaviours:
If you are successful at the application stage, you will be invited to interview where you will be assessed against the following criteria:
- Changing and Improving
- Managing a Quality Service
- Working Together
- Experience
Interview Task / Presentation
Prior to your interview, we will contact you about a task / presentation that the panel would like you to deliver as part of the assessment. Further details will be communicated to you nearer the time.
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Behaviours
We'll assess you against these behaviours during the selection process:
- Changing and Improving
- Managing a Quality Service
- Working Together
Benefits
Alongside your salary of £57,670, HM Treasury contributes £16,706 towards you being a member of the Civil Service Defined Benefit Pension scheme. Find out what benefits a Civil Service Pension provides (opens in a new window).
- Generous Annual Leave - 25 days (rising to 30 after 5 years), plus public holidays and the King’s birthday.
- Outstanding Pension Scheme - Defined Benefit pension with employer contributions of 28.97%
- Parental Leave Packages - Including 6 months’ occupational pay for maternity/adoption, shared parental leave options.
- Flexible & Hybrid Working - Options include part-time, job-share, compressed hours, flexitime, and hybrid working (where business needs allow).
- Advance Schemes & Discounts - Rental deposit, cycle-to-work, SmartTech, season ticket loans, and access to HM Treasury’s benefits portal for a wide range of discount codes.
You can review HM Treasury’s full offer here.
Artificial intelligence
Artificial intelligence can be a useful tool to support your application, however, all examples and statements provided must be truthful, factually accurate and taken directly from your own experience. Where plagiarism has been identified (presenting the ideas and experiences of others, or generated by artificial intelligence, as your own) applications may be withdrawn and internal candidates may be subject to disciplinary action. Please see our candidate guidance (opens in a new window) for more information on appropriate and inappropriate use.
Selection process details
This vacancy is using Success Profiles (opens in a new window), and will assess your Behaviours and Experience.
Candidate Guidance
Please review the candidate guidance for an overview of the Success Profiles and STAR approach, along with top tips for applications and interviews.
Recruitment Timeline
- Closing date: 9th August 2026
- Shortlisting: w/c 10th August 2026
- Interviews: w/c 17th and w/c 24th August 2026
This timeline is indicative and may be subject to change. We will inform you if there is a substantial change to the recruitment timeline.
If your contact details change at any time during the selection process, please ensure you update your Civil Service Jobs Profile.
Reserve Lists
You will be placed on a reserve list if your application is successful, but we cannot offer you a role immediately. Where more than one location has been advertised, candidates will be posted in merit order by location. You will be asked to provide your location preference on your application form. Please note that a place on the reserve list does not guarantee an offer.
If you are offered a role in your first preferred location and you decline the offer or are unable to take up the post within a reasonable timeframe, you will be removed from the reserve list, other than in exceptional circumstances.
Those on the reserve list may also be approached for similar roles at a lower grade. If you are offered a role at a lower grade and choose to decline, you can remain on the reserve list.
Internal Fraud Database Check
Candidates cannot apply to roles in the Civil Service if the application is made within
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