Technical Consultant: Payments & Integration

• Discovery & Assessment: Analyse business requirements, process flows, integration points, data dependencies, and platform constraints for prioritised payment initiatives.
• Solution Architecture: Produce architecture artefacts, technical designs, API and integration definitions, data flow mappings, and supporting specifications.
• Proof of Concept Development: Build prototypes, demonstrators, technical spikes, integration stubs, APIs, and SDK-related components to validate feasibility and support decision-making.
• Integration Support: Shape and test integration approaches including interface mapping, dependency analysis, API/service interaction design, and coordination with client platform teams.
• Documentation & Playback: Deliver concise technical notes, architecture observations, implementation recommendations, and status summaries to support client review.
• Governance & Collaboration: Participate in stand-ups, checkpoints, reviews, and stakeholder playback sessions. Provide regular reporting on progress, risks, and dependencies.
• Cross-Team Support: Deploy flexibly across multiple workstreams and squads to unblock priority items and accelerate progress.

Characteristics

• Simplify: Turn complex payment flows and messy requirements into clear, validated technical approaches.
• High-performance: Care about feasibility, integration resilience, and delivering outputs that stand up to scrutiny.
• Collaborative: Comfortable working across squads, giving and receiving reviews, and communicating technical decisions clearly.
• First-principles: Handle ambiguity in early-stage initiatives and make trade-offs explicit.
• Ownership: Proactive, organised, and comfortable leading technical workstreams end-to-end.

• Right to work in the UK; fluent in written and spoken English.
• 3 days a week in travel to Digital Speed HQ, London Paddington.
• 4+ years in a technical delivery role within payments, banking, or financial services.
• Strong understanding of enterprise payment platforms, payment processing flows, and transaction lifecycle management.
• Experience designing and building integrations between payment systems - APIs, messaging protocols, service orchestration.
• Comfortable producing solution architecture artefacts and technical design documentation.
• Hands-on prototyping and proof-of-concept development experience.
• Familiarity with modern CI/CD practices, git, and code review workflows.
• Experience working in agile delivery teams within regulated environments.

Desirable Extras

• Experience with real-time payment rails, cross-border payments, or settlement infrastructure.
• Prior agency or consultancy experience delivering into large enterprise clients.
• Familiarity with cloud platforms (AWS/Azure/GCP) and containerised deployments.
• Knowledge of OAuth/OIDC, mTLS, or security patterns in financial services.
• Experience with enterprise ERP or core banking platform integrations.

Digital Speed is a full-service product and engineering agency delivering strategy, design, and development for global clients. Our expertise spans Brand, Discovery, UX/UI, and Full-Stack Engineering, alongside product strategy and marketing. We partner with organisations in finance, automotive, sport, and technology to ship dependable, high-quality outcomes at scale.We are driven by 4 key values: * Open - We arrive with options, welcome feedback, and find the best way forward together. * Thriving - New challenges energise us; we learn and improve as a team. * Experts - Specialists who care about their craft and deliver results with structure. * Caring - We take our clients' goals as seriously as our own and build trusted relationships. Where do you fit in? You'll join as a Technical Consultant embedded within a major financial services client's digital platform team in London. Working as part of a small, high-impact Digital Speed delivery squad, you'll shape and build proof-of-concept solutions that validate new payment capabilities on enterprise platforms. This is a role for someone who thrives on rapid discovery, technical problem-solving, and translating complex requirements into working prototypes - spanning architecture, integration design, and hands-on development.