Pre-Sales Senior Engineer

About the Position

Pre-Sales Senior Engineer

Kaluza is the Energy Intelligence Platform, turning energy complexity into seamless coordination. We help energy companies overcome today's challenges while accelerating the shift to a clean, electrified future. Leveraging Data, AI, and real-time decision-making we turn energy complexity into growth opportunities for our partners.

By combining predictive algorithms with human-centred design, Kaluza makes clean energy dependable and affordable.

With teams across Europe, Asia and Australia, and a joint venture with Mitsubishi Corporation in Japan, we power leading companies including OVO, AGL and ENGIE, as well as innovators like Volvo and Volkswagen.

Location

London/Bristol - Hybrid

Salary

£65,000 - £75,000

Team

Commercial

Reporting To

Head of Client Solutions

Responsibilities

As a Senior Pre-Sales Engineer, you are a "developer-plus" technical contributor. You are responsible for building high-quality mock backends, APIs, and demo infrastructure, but with a unique twist: you leverage LLMs and Generative AI to prototype at high velocity.

Your core responsibilities will include:

• AI-Accelerated Prototyping: Leverage LLMs (e.g., Claude and Gemini) to rapidly scaffold, build, and iterate on proof-of-concept apps and mock services. You move faster than a traditional sprint by using AI to handle the "heavy lifting" of boilerplate and logic generation.
• Technical Asset Development: Design, build, and maintain reusable mock services in Node.js / TypeScript. You’ll implement contract-first APIs (REST/GraphQL), manage AWS deployments (API Gateway, Containers), and handle persistence using PostgreSQL or DynamoDB.
• Infrastructure as Code: Manage demo environments using Terraform, ensuring environments are reproducible and secure using existing OIDC authentication patterns.
• Frontend Collaboration: Work closely with frontend engineers to ensure UI components point cleanly to your mock services, debugging integration issues and supporting end-to-end demo flows.
• Strategic Pre-Sales Support: Partner with Pre-Sales consultants to translate client "win themes" into working technical artefacts. You will occasionally demo directly to clients, showcasing how Kaluza solves their specific retail challenges.
• Product & UX Influence: Collaborate with Design and Product teams for UI direction while developing your own design ideas to make Kaluza’s capabilities shine.
• Mentorship & Standards: Set informal engineering standards for the pre-sales team, mentoring others on API design and architecture.
• AI Evangelism: Act as the resident expert in GenAI workflows for the Commercial team, mentoring others on how to use AI to bridge the gap between "slide-ware" and "software."

Requirements

• Software Engineering Foundation: Strong hands-on experience in Node.js / TypeScript and React. You know how to write code from scratch, which is why you’re so good at prompting AI to do it for you.
• GenAI Power User: Deep experience leveraging LLMs and Generative AI to build apps, debug complex issues, and accelerate the development lifecycle. You aren't just using an AI assistant; you are "vibe coding" complete PoCs.
• API Design Expert: Experience designing clean, well-documented APIs (REST and/or GraphQL) and using Git/Github workflows effectively.
• Cloud & Infrastructure Knowledge: Familiarity with AWS primitives and a proven ability to deploy infrastructure using Terraform.
• Pragmatic & Autonomous: Comfortable operating with ambiguity, translating vague client requirements into working systems through a high degree of initiative.

Nice to Have

• The "Prototyper" Portfolio: A track record of building internal tools, sales demos, or high-fidelity PoCs using AI-first workflows.
• Energy Sector Insight: Understanding the specific challenges facing energy retailers globally.
• Auth & Security Savvy: Practical knowledge of OIDC-based authentication flows.
• Design Thinking: A talent for sharing UX/UI design thinking with wider product teams.

We Offer

• Pension Scheme
• Discretionary Bonus Scheme
• Private Medical Insurance + Virtual GP
• Life Assurance
• Access to Furthr - a Climate Action app
• Free Mortgage Advice and Eye Tests
• Perks at Work - access to thousands of retail discounts
• 5% Flex Fund to spend on the benefits you want most
• 26 days holiday
• Flexible bank holidays, giving you an additional 8 days which you can choose to take whenever you like
• With no qualifying service periods, including up to 26 weeks full pay for primary caregivers and 4 weeks full pay for secondary caregivers when welcoming a new addition to your family
• Dedicated personal learning and home office budgets
• And more…

About the Company

We offer flexible working, with an expectation of 3 days a week in the office. This gives us the best of both: real time together to collaborate and build relationships, with the flexibility to work in the way that suits you best the rest of the week.

Kaluza Values

Here at Kaluza we have five core values that guide us as a business:

• Play to win
• Solve the real problem
• Build trust every day
• Own the outcome
• Go further together

We’re keen to meet people from all walks of life - our view is that the more inclusive we are, the better our work will be. We want to build teams which represent a variety of experiences, perspectives and skills, and we recognise talent on the basis of merit and potential.

If you're excited about joining us and think you have some of what we're looking for, even if you're not 100% sure, we'd still love to hear from you.

Find out more about working at Kaluza on our careers page and LinkedIn.

You can also find our Applicant Data Protection Policy here.