Top Tech Jobs & Startup Jobs in London

Build reusable mock backends, APIs, proof-of-concept applications, and demo infrastructure for pre-sales engagements. Use LLMs and Generative AI to accelerate prototyping, deploy services on AWS with Terraform, and collaborate with frontend, product, design, and pre-sales teams. Support client demonstrations, translate requirements into technical artifacts, mentor colleagues on API design and AI workflows, and establish engineering standards for the commercial team.

Lead technical pre-sales engagements for an energy intelligence SaaS platform. Responsibilities include discovery workshops, architecture and integration design, technical presentations, tender responses, proof-of-concept planning, work-package estimation, and handoffs to implementation teams. The role also advocates for customer needs with product and engineering teams, supports value quantification, and travels to client sites across the UK and Europe as required.

Lead the technical direction and architecture of a major global product area comprising multiple modules. Design scalable distributed cloud systems, shape technical vision and roadmaps, guide engineering teams, make high-stakes architectural decisions, and partner with technical and executive stakeholders. The role is primarily hands-off, with occasional code-level design and proof-of-concept work. Responsibilities also include mentoring engineers, driving modern engineering practices, and enabling AI-powered solutions.

Own the French localization of a global energy billing platform, translating regulatory and client requirements into product specifications and roadmap priorities. Lead collaboration with clients, market experts, engineering, UX, QA, legal, and operations teams to deliver compliant billing functionality covering meter reads, tariffs, invoices, payments, and reporting. Monitor French energy legislation, manage scope and stakeholders, and serve as the subject matter expert for French billing requirements.

Lead engineering across two global billing, payments, and API domains, owning technical and product strategy, cross-squad initiatives, stakeholder alignment, and people leadership for two teams. Diagnose systemic and organizational issues in a high-integrity data environment where reliability and reconciliation are critical. Drive customer-focused solutions, apply AI and LLMs for customer impact, manage hiring and performance, and support a shared global platform with configurable market-specific edges.

Owns system design and architecture for a global billing and payments API platform. The Staff Engineer will establish reusable API patterns and technical standards, resolve complex technical issues, shape engineering proposals, and align leadership and adjacent teams on technical direction. The role also involves mentoring engineers, supporting a configurable global platform model, and applying AI/LLMs to customer-impacting solutions in a reliable, secure, auditable data domain.

Leads the quality and release engineering function across multiple delivery streams. Owns quality strategy, release governance, risk acceptance, defect governance, and go/no-go decisions. Manages engineers developing AI-assisted automation and test data capabilities, while leading QA transformation, operating model development, and upskilling. Establishes testing standards, shift-left practices, observability, and production monitoring. Partners with senior engineering and product stakeholders to improve release stability, communicate quality outcomes, and balance delivery velocity with risk.

Own the global vision, strategy, roadmap, and commercial success of Kaluza’s residential VPP platform. Lead Product Managers across device integration, optimisation, monetisation, and SaaS teams; establish OKRs; make strategic trade-offs; partner with engineering, commercial, and partnerships teams; support enterprise sales; and build a high-performing product organisation. The role requires strong product leadership, commercial judgment, communication, coaching, and experience with complex B2B or B2B2C platforms.

Manages engineering teams of up to 10 people, guiding technical and product vision, talent development, performance, delivery, and operational excellence. Partners with clients, product managers, and client success teams to deliver platform solutions and drive technical roadmaps. Requires engineering management experience, strong communication, Agile and lean development knowledge, and familiarity with modern technologies including Kafka. The role involves 4–6 business trips annually and hybrid office work three days per week.

Design, build, and maintain scalable backend services for Kaluza’s energy retail platform. Responsibilities include developing event-driven systems, optimizing SQL and NoSQL databases, using AWS and serverless architectures, monitoring production services, and collaborating with product and engineering teams. The role also involves mentoring colleagues, promoting engineering best practices, and owning services from architecture through continuous improvement.