40 Chief Technology Officer jobs in the United Kingdom

Founding Engineer/Future CTO - Build the Future of Software Development

Location: 4x a week in London office

Salary: £80,000 - £100,000 + Stock Options (2% minimum) with increase in salary post-seed funding

Stage: Pre-Seed Funded

We’re partnering with an ambitious start-up that’s on a mission to completely rethink how software is built. With a pre-seed round of almost $2m from top-tier investors, this is a unique opportunity to join a small, high-impact team and help shape the next wave of software creation tools.

The Opportunity

Our client is looking for a talented, driven Founding Engineer to join a team of passionate innovators as they set out to change how software is made. With a vision to make software creation as seamless and natural as possible, their team is building a tool that will empower organizations to build and scale apps. As an early member of this team, you’ll have a direct impact on the technology, product direction, and overall success of the company.

Why This Matters Now

Their goal is to bring about a world where building software feels more like art than science, where developers spend more time creating and less time battling complex, inefficient processes. This is your chance to be part of a team that is shaping the future, building on the most exciting technological advancements of our time.

What You’ll Be Doing

• Work directly with the founder and founding engineers to create a tool that simplifies the software development process.
• Design, develop, and scale both front-end and back-end systems using TypeScript and React , and .Node.Js for backend.
• Contribute to a monorepo architecture and design elegant, high-quality solutions that solve complex technical challenges.
• Collaborate closely with the team to iterate and deliver impactful features that improve productivity and scalability for software teams.
• Play a significant role in developing both the core product and features that will empower users to understand and build software at scale.

What They’re Looking For

• Experience as a founding engineer, with an ambition to move into a CTO position within the next year
• Strong coder, ideally with experience in TypeScript and React alongside, back-end, and infrastructure development.
• Strong experience in full-stack engineering , preferably with a lean to the backend and in a monorepo setup.
• Solid experience with SQL and a passion for building robust, scalable systems.
• Comfort working in a fast-paced, early-stage startup environment with an eagerness to take ownership of large, impactful projects.
• An enthusiasm for problem-solving and the ability to balance speed with quality.
• A collaborative mindset and the ability to thrive in a small, highly focused team.

You Should Join

• Equity: Join a high-growth start-up and take ownership in the company with 2% stock options (with the possibility to increase equity by trading salary).
• Progression: As an early start-up, you'll have the opportunity to progress to a CTO position, line managing the 2 other engineers.
• Impact: As one of the first engineers, you’ll be at the heart of the product development process and help shape the company’s culture and vision.
• Growth: With the backing of top-tier investors, this company is primed for growth. You’ll have plenty of opportunities to grow your role and develop new skills.
• Autonomy: Be a part of a small, agile team where your contributions will have a direct impact on the product and its success.
• Exciting Mission: Build a tool that will help change the future of software development and make it more accessible to everyone.

Join Them

If you're a skilled, curious engineer, with previous founding engineer experience and are ready to join an early-stage, high-potential start-up and make a lasting difference, we want to hear from you!

Apply now and help them build the future of software.

Chief Technology Officer (CTO) – AI-Driven FinTech Start-up

Location: London (Flexible hybrid working)

Compensation: Up to £150,000 + meaningful equity

We’re working with an early-stage FinTech venture building a next-generation AI platform that empowers organisations to stay ahead of fast-moving external developments. Combining revolutionary technology with a unique approach to contextual insight, the platform helps clients identify emerging risks and opportunities in real time, translating complex signals into actionable intelligence tailored to their business.

As they enter a critical phase, with upcoming client demos, MVP validation, and early implementations on the horizon, they're seeking a strategic, hands-on CTO to lead the company’s technical vision and execution. This is a founding leadership opportunity to shape the future of an industry-defining platform, influence product direction, build a high-calibre engineering team, and partner with global financial institutions.

The Opportunity

This isn’t just another CTO role. You will:

• Architect and scale a highly intelligent, self-learning agentic platform capable of embedding human expertise and learning from usage patterns in real-time.
• Build a system that interprets complex global data, links it to enterprise-specific exposures, and delivers contextualised recommendations.
• Define a flexible architecture that can adapt to new domains and evolve with client needs.
• Collaborate directly with clients, investors, and capital partners to ensure credibility, delivery, and long-term scale.
• Translate PoC momentum into scalable, compliant, secure enterprise-grade deployments.

What You’ll Do

• Architect and build: Lead design and execution of a secure, scalable, cloud-native architecture. System is built in Python, using agentic LLM strategies (multi-agent RAG).
• Collaborate and innovate: Work closely with Chief AI Engineer and founders to define the product roadmap and push the boundaries of real-time predictive analytics.
• Lead technical delivery: Own end-to-end delivery, from prototypes to client integrations, ensuring security, compliance, and enterprise readiness.
• Bridge vision and execution: Translate product vision into an executable roadmap while maintaining the agility of a start-up.
• Engage externally: Be the technical face of the company in client and investor meetings, articulating roadmap, vision, and scalability.

What We’re Looking For

Industry Knowledge

• Deep experience in wholesale financial services or adjacent enterprise sectors.
• Proven record of deploying technology within regulated, complex enterprise environments, including integration into internal client data layers, cloud systems, and governance frameworks.

Start-Up & Scale-Up Experience

• A hands-on senior leader with prior experience taking a product from concept/MVP to live enterprise deployments.
• Comfortable with rapid prototyping, iterative feedback loops, and balancing tech debt with innovation.

Technical Strength

• Deep architectural and engineering background - ideally with hands-on full-stack experience in Python.
• Strategic grasp of LLM systems (agent-based architectures, evaluation layers, human-in-the-loop designs), even if not an AI expert.
• Can make practical decisions on model choice, architecture design, and technical trade-offs in early-stage environments.

Leadership & Communication

• Inspiring, credible leader who can attract top engineering talent and collaborate with AI researchers.
• Comfortable in client meetings and investor discussions, articulating complex tech in commercial terms.
• Brings operational rigor and creativity - equally at home building from scratch and thinking about future extensions into new verticals.

Tech Stack & Concepts

• AI/LLM Strategy: Multi-agent RAG architecture, real-time model evaluation, adaptive agent coordination
• Enterprise Engineering: Data lake integration, secure APIs, compliance and regulatory alignment
• Product Focus: Real-time alerts, contextual event tracking, client-specific strategic insights

Why Join?

• Be a founding leader in a business with a genuinely differentiated product already gaining real client traction
• Shape the technical and strategic future of an AI-powered platform redefining enterprise decision-making
• Earn meaningful equity in a venture positioned for long-term impact across financial services and beyond

If you’re a commercially-minded, deeply technical CTO with domain knowledge in financial services, and ready to lead a high-potential product from PoC to enterprise scale, we’d love to hear from you.

CTO | Global SaaS | PE-Backed | Scale & Exit Opportunity

Overview:

A global SaaS business with 600 people worldwide (130 in Engineering) is entering a pivotal phase: consolidating a multi-product landscape and scaling from ~$100m ARR to ~$200m over the next three years. Backed by a leading private equity firm, this is a rare opportunity to lead the technology function through a major multi-product consolidation and scale-up, directly influencing enterprise value.

We're looking for a strategically minded, technically credible CTO - someone who can turn complexity into clarity, standardise technology, embed engineering discipline, and inspire a culture of excellence across engineering teams. You'll need to have also witnessed such scale too - not necessarily as CTO, potentially as a VP - but had a leading role and know what it takes to achieve this.

You'll partner with the COO, Chief Product Officer, and Chief Architect to design and deliver technology strategy, giving confidence to peers and investors while motivating teams through technical credibility and leadership.

Key initiatives will include:

• Consolidating acquired products into a unified, coherent single sign-on platform
• Driving cloud migration to AWS and broader technology standardisation
• Embedding measurable engineering excellence across global teams
• Aligning strategy with execution in partnership with Product, Security, and leadership
• Leveraging agentic AI to accelerate delivery and efficiency

In terms of the experience we're looking for:

• A proven technology leader with experience scaling SaaS platforms, ideally in PE-backed businesses.
• Ability to earn trust and respect across both Engineering teams and the C-Suite,
• Prior experience leading similar similar transformations - simplifying fragmented products, streamlining platforms, and integrating acquisitions to create clarity and scalability.
• Strong technical acumen, a modern SaaS mindset, and a pragmatic approach to emerging technologies, including AI, to drive measurable impact.
• You excel in engineering performance and know what good looks like - embedding metrics, modernising culture, and inspiring teams across distributed environments.
• Curious, resilient, and outcomes-focused, you bring structure to ambiguity and inspire confidence at every level.

Location & Package:

London HQ, hybrid (3 days in-office). Very strong package with a highly attractive equity opportunity.

Chief Technology Officer

Relevant Five is partnering with a rapidly expanding Digital Marketing and Communications agency to identfy a CTO.

As CTO, you will join our Board of Directors and partner with the CEO to shape a 3-year technology strategy that drives growth, efficiency, and innovation. This hands-on role requires evaluating and enhancing our products, processes, and tech infrastructure to support our ambitious goals.

Key Responsibilities

• Develop and execute a 3-year technology roadmap aligned with business growth objectives.
• Standardise and optimise our tech stack, focusing on web development (WordPress), SEO/PPC tools, and VoIP systems.
• Design an API strategy to enable seamless integration of internal and external tools.
• Collaborate with media and telecoms teams to enhance systems and processes.
• In collaboration with the CEO drive an AI strategy (internal and external) to boost efficiency and revenue.
• Ensure compliance with GDPR and other relevant data security regulations.
• Lead the team

Required Skills and Experience:

• 5+ years in a senior technical leadership role (e.g., CTO, VP of Engineering) in digital marketing, web development, or telecoms.
• Proven expertise in architecting scalable solutions in cloud environments (AWS preferred).
• Deep and strong understanding of web development frameworks (e.g., WordPress) and programming languages (e.g., Java, Python).
• Familiarity with SEO/PPC tools (e.g., Ahrefs, SEMrush, Google Analytics) and VoIP technologies.
• Demonstrated ability to simplify complex technical challenges into actionable solutions.
• Exceptional communication skills for board-level, internal, and client interactions.
• Knowledge of GDPR and data security best practices.
• Degree in Computer Science, Digital Marketing, or a related field is advantageous.

Teqconnect are on the lookout for a CTO to join our client, they are a one-stop shop for customers who want to enhance their business with proven, up-to-date solutions based on conversational AI and technologies beyond it: LLMs, NLP, Speechtech. Their team brings huge cutting-edge, specialized expertise in Natural Language Processing and Speech Technologies.

We are looking for a CTO with a proven track record in scaling engineering organizations , delivering AI-driven products, and aligning technical strategy with business outcomes.

Your Responsibilities:

• Define and evolve the technology vision and architecture of the platform, aligned with product and business goals
• Lead and grow a high-performing, globally distributed engineering team
• Drive hands-on technical leadership when necessary (architecture reviews, problem-solving, decision making)
• Collaborate closely with Product, ML and Client Delivery teams

Must-Haves:

• Prefer to see someone who had some experience scaling engineering teams to at least 100 -150 people
• Huge plus will be experience not just with SaaS, but with on-prem and/or private/isolated client deployments.
• Experience in building and running ML platforms/solutions
• 10+ years in engineering leadership roles , including as a CTO, VP of Engineering in high-scale environments
• Proven track record in fast-paced startups, ideally in B2B or SaaS AI/ML domains, with a strong understanding of the US and European markets
• Strong hands-on background in Python , with deep understanding of distributed systems, APIs, cloud infrastructure, and MLOps

A well-established SaaS company is hiring a CTO / Technical Director to lead a major transformation of its product and technology function. This is not a typical CTO role. The business is looking for someone who can re-architect a legacy platform into a modern, AI-integrated environment while rebuilding an in-house engineering team from scratch.

Role: CTO / Technical Director

Salary: Up to £140,000 per annum

Location: Fully Remote (UK-based)

What you’ll be doing:

• Lead the transformation of a legacy SaaS platform into a scalable, AI-first product
• Define and deliver the technical roadmap, moving towards Python, TypeScript, and cloud-native infrastructure
• Embed AI and agentic capabilities to enhance automation and user experience
• Build and develop a new in-house engineering function, hiring and mentoring talent
• Stay hands-on to guide architecture and solve complex technical problems
• Collaborate with senior leadership to ensure product and technology strategies align

What you’ll need:

• Proven experience delivering technology transformations within SaaS environments
• Strong technical expertise in modern stacks such as Python, TypeScript, and AWS
• Understanding of AI and agentic systems and how they can be applied to SaaS
• Track record of building or rebuilding engineering teams in-house
• Ability to balance strategic direction with hands-on technical leadership
• Excellent communication and stakeholder management skills

What’s on offer:

• Salary up to £140,000 per annum
• Fully remote role within the UK
• The chance to own a complete transformation of product and team
• Opportunity to embed AI technologies at the core of a global SaaS product
• Build and lead a high-performing in-house engineering function

If you are an ambitious technical leader with a passion for transformation and AI, this is a rare opportunity to shape the future of a SaaS platform and the team behind it.

Head of Tech Operational Excellence & Transformation

Are you ready to drive large-scale transformation in a global technology environment? We are seeking a Head of Tech Operational Excellence & Transformation to lead our transformation office, ensuring operational productivity, financial readiness, and strategic delivery as the organization scales and evolves.

Role Purpose

Lead the transformation office, overseeing cost planning, operational excellence, and cross-functional change initiatives. Act as a trusted partner to the executive team, delivering measurable productivity gains and building a scalable governance model.

Key Responsibilities

• Lead transformation programs including organizational redesign, budget realignment, and shared capabilities rollout.
• Develop and maintain the central technology cost model (CAPEX/OPEX, financial reporting).
• Oversee transversal programs such as capacity rebalancing and workplace transformation initiatives.
• Run SteerCo cycles with senior stakeholders across technology, finance, and product functions.
• Define and track key KPIs: cost per feature, productivity index, on-time delivery, engineering burn rates.
• Partner with Finance & Procurement on budget planning, vendor strategy, and resource allocation.
• Drive portfolio prioritization and orchestrate resources across delivery teams.

Expectations

• Deliver 10–15% year-on-year productivity improvements through transformation initiatives.
• Ensure full visibility and accurate forecasting of all major transformation costs and savings.
• Establish a scalable transformation governance model recognized by executive leadership.
• Position the organization as a benchmark for tech operational excellence and cost transparency.

Requirements:

• 10+ years in tech transformation, financial planning, or COO/CIO office roles (enterprise/consulting).
• Strong expertise in tech cost structures, portfolio management, and cross-functional governance .
• Proven success in managing complex, multi-stakeholder transformation initiatives .
• Advanced skills in financial tools (SAP, cost modeling, Excel) and analytics.
• Familiarity with regulatory reporting, board-level budgeting, and IT compliance frameworks .
• Analytical, structured, and diplomatic with strong presentation and facilitation skills .

As CTO of Hynamics UK, you will be accountable for the technical and technological integrity of the company’s hydrogen activities, across the full lifecycle: business development, project development, engineering, construction, commissioning, operations, and optimisation.

You will ensure that technical excellence and industrial performance are embedded into all phases of the project pipeline—from the evaluation and validation of offers and technical solutions, through safe and cost-effective delivery, to the reliable and sustainable operation of hydrogen assets. You will be responsible for establishing and maintaining Hynamics UK’s technology roadmap in alignment with the Group’s wider strategy, ensuring the adoption of best-in-class hydrogen production, compression, storage, and distribution technologies.

You will oversee the selection and integration of process technologies (e.g. electrolyser technologies, balance-of-plant components), lead technical risk assessment and mitigation efforts, and ensure full compliance with applicable UK and international regulations and standards. A key part of your role will involve guiding innovation and digitalisation efforts in engineering and operations (e.g. automation, remote O&M, data platforms).

You will lead a team of technical specialists and project engineers, while also developing and managing a high-performance ecosystem of industrial partners (OEMs, EPCs, engineering firms, and technology providers). Your network will include both internal EDF Group entities and external industry stakeholders across the hydrogen value chain.

You will report to the CEO of Hynamics UK and work in close coordination with the CTO of Hynamics Group in Paris. You will be a key member of the Hynamics UK Leadership Team, actively participating in all strategic decisions and contributing directly to the development of both the UK and Group-wide industrial strategies.

Key Responsibilities

Corporate Leadership

• Lead the technical organisation of Hynamics UK, ensuring alignment with corporate strategy and project priorities.
• Build, develop, and manage a high-performing team of engineers and technical specialists to support the full lifecycle of hydrogen infrastructure assets.
• Promote a strong industrial safety culture and embed technical excellence across all activities.

Technology and Innovation

• Define and maintain the hydrogen technology roadmap for Hynamics UK
• Identify, assess, and integrate emerging technologies to improve performance, reduce costs, and support future competitiveness.
• Drive innovation and digitalisation across engineering, commissioning, and O&M

Project & Engineering Oversight

• Ensure the technical robustness of all projects submitted for Final Investment Decision (FID), including CAPEX, OPEX, execution risk, and industrial safety.
• Secure and validate project execution strategies and engineering approaches.
• Supervise all phases of engineering, construction, and commissioning, ensuring safety, schedule adherence, budget control, and technical quality.
• Provide technical leadership for procurement strategies and support contractual negotiations related to equipment, EPCs, and O&M providers.

Operations & Maintenance

• Define and implement the O&M strategy for hydrogen production and distribution assets, ensuring high levels of safety, availability, and reliability.
• Supervise ongoing operations and performance monitoring, implementing continuous improvement based on operational feedback.
• Embed lifecycle asset management principles to optimise cost, performance, and risk across all technical systems.

Partnerships & External Engagement

• Develop and manage technical partnerships, including OEMs, engineering firms, EPC contractors, and technology providers.
• Collaborate with internal EDF Group entities to ensure cross-business synergies and alignment on technical platforms.
• Represent Hynamics UK in technical forums, standards development bodies, and hydrogen industry associations as required.

Compliance, Safety & Quality

• Ensure all activities and assets comply with relevant UK legislation, industry codes, and safety/environmental regulations.
• Promote continuous improvement in quality assurance and technical risk management, including processes and certification strategies.
• Lead the capture and application of lessons learned and technical feedback from live projects and operational assets.

Candidate Profile

• Postgraduate qualification in engineering or a related technical discipline.
• Minimum 20 years of professional experience in large industrial or energy infrastructure projects, with substantial exposure to the chemical industry or industrial gases.
• Proven track record of delivering large-scale industrial facilities (>£100 million CAPEX) across engineering, procurement, and construction phases.
• Deep understanding of hydrogen technologies, especially electrolyser systems, gas compression, storage, and transport.
• Demonstrated experience in leading technical organisations and multidisciplinary teams.
• Familiarity with operations and maintenance of large-scale chemical or energy assets.
• Prior CTO or executive-level leadership in an industrial or technology company is highly desirable.
• Exposure to renewable energy sectors (e.g. onshore/offshore wind, solar, grid integration) is a plus.
• Knowledge of UK regulatory frameworks, planning approvals, permitting, and industrial safety standards.
• Experience working within multinational or matrixed organisations, particularly in UK-French environments.
• Excellent leadership, communication, and stakeholder engagement skills.
• Fluent in English and French (written and spoken).

Founding Engineer/Future CTO - Build the Future of Software Development

Location: 4x a week in London office

Salary: £80,000 - £100,000 + Stock Options (2% minimum) with increase in salary post-seed funding

Stage: Pre-Seed Funded

We’re partnering with an ambitious start-up that’s on a mission to completely rethink how software is built. With a pre-seed round of almost $2m from top-tier investors, this is a unique opportunity to join a small, high-impact team and help shape the next wave of software creation tools.

The Opportunity

Our client is looking for a talented, driven Founding Engineer to join a team of passionate innovators as they set out to change how software is made. With a vision to make software creation as seamless and natural as possible, their team is building a tool that will empower organizations to build and scale apps. As an early member of this team, you’ll have a direct impact on the technology, product direction, and overall success of the company.

Why This Matters Now

Their goal is to bring about a world where building software feels more like art than science, where developers spend more time creating and less time battling complex, inefficient processes. This is your chance to be part of a team that is shaping the future, building on the most exciting technological advancements of our time.

What You’ll Be Doing

• Work directly with the founder and founding engineers to create a tool that simplifies the software development process.
• Design, develop, and scale both front-end and back-end systems using TypeScript and React , and .Node.Js for backend.
• Contribute to a monorepo architecture and design elegant, high-quality solutions that solve complex technical challenges.
• Collaborate closely with the team to iterate and deliver impactful features that improve productivity and scalability for software teams.
• Play a significant role in developing both the core product and features that will empower users to understand and build software at scale.

What They’re Looking For

• Experience as a founding engineer, with an ambition to move into a CTO position within the next year
• Strong coder, ideally with experience in TypeScript and React alongside, back-end, and infrastructure development.
• Strong experience in full-stack engineering , preferably with a lean to the backend and in a monorepo setup.
• Solid experience with SQL and a passion for building robust, scalable systems.
• Comfort working in a fast-paced, early-stage startup environment with an eagerness to take ownership of large, impactful projects.
• An enthusiasm for problem-solving and the ability to balance speed with quality.
• A collaborative mindset and the ability to thrive in a small, highly focused team.

You Should Join

• Equity: Join a high-growth start-up and take ownership in the company with 2% stock options (with the possibility to increase equity by trading salary).
• Progression: As an early start-up, you'll have the opportunity to progress to a CTO position, line managing the 2 other engineers.
• Impact: As one of the first engineers, you’ll be at the heart of the product development process and help shape the company’s culture and vision.
• Growth: With the backing of top-tier investors, this company is primed for growth. You’ll have plenty of opportunities to grow your role and develop new skills.
• Autonomy: Be a part of a small, agile team where your contributions will have a direct impact on the product and its success.
• Exciting Mission: Build a tool that will help change the future of software development and make it more accessible to everyone.

Join Them

If you're a skilled, curious engineer, with previous founding engineer experience and are ready to join an early-stage, high-potential start-up and make a lasting difference, we want to hear from you!

Apply now and help them build the future of software.