TL;DR
A fractional CTO job description template UK businesses can use should focus on outcomes (security, reliability, delivery and roadmap) rather than a long list of technologies. A fractional CTO is a part-time technology leader who sets direction, governs delivery, and makes sure engineering spend turns into measurable product and operational results. Last updated: 15 July 2026.
If you are hiring your first senior technology leader, a clear brief is the difference between a CTO who drives momentum and a ‘senior developer with a fancy title’. The fractional model is popular with UK SMEs and scale-ups because you can secure senior leadership quickly, without committing to a full-time salary before the business is ready.
This guide gives you a practical fractional CTO job description template UK companies can adapt, plus example responsibilities, outcomes, KPIs, and interview prompts. It is written for founders and MDs of product-led businesses, marketplaces, and tech-enabled services firms.
Employment documentation also needs to be clear: UK government guidance notes that the ‘principal statement’ of employment particulars includes the employee’s job title or a description of their work. (GOV.UK guidance on written statements).
What is a fractional CTO (and what are you actually hiring)?
A fractional CTO (Chief Technology Officer) is a senior technology leader engaged part-time, typically on a monthly retainer for one to three days per week. They sit above day-to-day engineering delivery and focus on direction, governance, and the decisions that reduce risk and improve delivery speed.
In practice, you are hiring three things: (1) a technology strategy that aligns to your business plan, (2) leadership of the engineering function (people, process, vendors), and (3) risk control — especially cyber security, resilience, and technical debt.
The job description should reflect that difference. ACAS publishes free job description templates showing the value of concise headings (job title, main purpose, key tasks, objectives, reporting line) rather than pages of detail. (ACAS job description templates).
Fractional CTO job description template (UK)
Below is a template you can paste into a job advert and tailor. If you are engaging a fractional CTO as a contractor, you can still use the same structure — just adjust ‘employment type’ and the compliance wording to match your arrangement.
- Job title: Fractional CTO (Part-time / Fractional) — UK
- Reporting to: Founder / Managing Director (and works closely with the board)
- Location: UK (hybrid/remote), with on-site days as required
- Engagement model: 1–3 days per week, initial 3–6 month engagement, with option to extend
- Role purpose: Provide senior technology leadership to ensure product and engineering investment delivers secure, reliable outcomes; set direction; govern delivery; build capability in the engineering team and/or supplier network.
- Scope: Product roadmap, engineering leadership, technology architecture, vendor governance, cyber risk, platform reliability, delivery process and KPI reporting.
- Key stakeholders: Founder/MD, Head of Product, Engineering lead(s), Operations/Customer support, key suppliers.
- Success measures (outcomes): Delivery predictability improves; major operational incidents reduce; security and compliance basics are implemented; the roadmap is prioritised and funded; engineering costs are controlled and transparent.
- Salary / day rate: Competitive (based on days per week, scope and complexity).
Key responsibilities (what a good fractional CTO will actually do)
Use responsibilities that describe decisions and governance — not a shopping list of frameworks. Here are examples you can select from.
- Own the technology roadmap with Product: turn business goals into a prioritised, costed and sequenced delivery plan.
- Set engineering standards: coding practices, review standards, environment management and release governance.
- Define the target architecture: reduce complexity, manage technical debt, and document the decisions that matter.
- Establish cyber security basics: risk register, access controls, incident response and supplier assurance.
- Improve reliability: agree SLOs/SLAs, monitor uptime, and remove the causes of recurring incidents.
- Lead and develop the team: hiring briefs, interview process, coaching and performance expectations.
- Govern suppliers: select partners, negotiate scope, manage quality, and keep delivery transparent.
- Introduce delivery rhythm: planning cadence, estimation approach, and KPI reporting to the board.
- Create clarity on spend: engineering budget, unit costs, and trade-offs between speed, quality and risk.
KPIs and scorecard examples for a fractional CTO
KPIs should be proportionate to your stage. Early-stage businesses need simple, decision-useful signals — not enterprise reporting theatre. Below are examples commonly used at UK scale-up stage.
- Delivery predictability: % of committed work delivered per sprint/month; cycle time trend.
- Reliability: uptime for customer-facing services; number of P1 incidents per month; mean time to restore.
- Quality: escaped defects; rollback rate; automated test coverage trend (directional).
- Security: time to patch critical vulnerabilities; MFA adoption; access review completion.
- Financial control: engineering spend vs budget; cloud cost per active user or per transaction.
- People: time-to-hire for key roles; retention; manager-to-engineer ratio as the team scales.
- Roadmap health: % of roadmap linked to commercial objectives; number of competing priorities reduced.
- Supplier performance (if applicable): on-time delivery rate; defect rates; responsiveness to incidents.
Tip: Put KPIs in the job description only if you can measure them. Otherwise, write them as ‘first 90-day outcomes’ (see below) and align them in the contract/SoW.
First 30/60/90-day outcomes (a simple way to hire well)
The fastest way to improve hiring quality is to describe the outcomes you expect in the first 90 days. Candidates then self-select, and interviews become a practical discussion about priorities and trade-offs.
- First 30 days: rapid discovery — current architecture, risks, delivery bottlenecks, supplier contracts; agree a prioritised action plan.
- First 60 days: stabilise delivery — delivery cadence, minimum security controls, incident process, clearer roadmap ownership.
- First 90 days: measurable improvement — reduced incident recurrence, clearer cost control, realistic roadmap, and a hiring plan for the next 2–3 roles.
If you want a benchmark for seniority: CTO salaries in UK salary guides commonly sit in six figures, which is why part-time leadership can be attractive when you are not yet ready for a full-time C-level hire. For example, Ashdown Group’s 2026 guide lists a national-average median CTO salary of £157,707. (Ashdown Group IT Salary Guide 2026).
How to choose the right fractional CTO
A good fractional CTO is as much about judgement and communication as technical depth. Use selection criteria that reduce risk: sector relevance, board-level reporting ability, evidence of delivery at your stage, and a pragmatic approach to security and resilience.
- Stage match: have they led teams at your size (first engineers, scale-up, or pre-PE operational maturity)?
- Commercial judgement: can they explain trade-offs in plain English and link the roadmap to revenue/cost outcomes?
- Security mindset: do they talk about risk management and ‘minimum viable controls’, not just tools?
- Delivery governance: do they have a clear approach to planning cadence, quality, and incident management?
- Vendor competence: if you use agencies/offshore teams, can they govern scope and quality without drama?
- Speed of start: can they begin within a week, with a clear discovery plan?
- Clarity on commercials: retainer/day-rate, availability, and exactly what you will get each month.
If you are exploring fractional support, start with a clear brief and ask for a 30-day plan. If you would like to see how we structure part-time engagements, you can also review our fractional CTO services page.
Frequently asked questions
Is a fractional CTO an employee or a contractor in the UK?
It can be either. Many fractional CTOs work under a consultancy or contractor arrangement, but some organisations use part-time employment for longer engagements. In both cases, be clear on responsibilities, reporting lines, confidentiality, and decision rights.
What should you avoid in a CTO job description?
Avoid a long list of technologies and buzzwords that does not map to outcomes. If you do not know what stack you need, focus on the problems (delivery speed, reliability, security, technical debt, supplier governance) and ask candidates how they would tackle them.
How many days per week do most fractional CTOs work?
For most SMEs and scale-ups, one to two days per week is enough to set direction, govern delivery, and coach the engineering lead. If you are re-platforming, rebuilding security controls, or scaling a team quickly, two to three days per week can be more realistic for the first 90 days.
What is a reasonable day rate for a fractional CTO in 2026?
Rates vary by sector, seniority and location. UK IT recruitment guides commonly show senior tech contractor day rates in the mid-hundreds to low-thousands, with leadership roles higher. As one reference point, Langley James’ UK IT, Tech and AI Salary Guide (July 2026) includes contractor day-rate benchmarks for senior roles. (Langley James salary guide (July 2026)).
Ready to find your fractional CTO?
If you want a fractional CTO who can start within one week, align your roadmap, and stabilise delivery without long-term tie-ins, we can help. Our network includes 500+ board-level directors, with monthly support from £1,795/month and a same-working-day response — contact us to discuss the scope and get a clear plan.
