Client Solutions Architect in City of London

Collinson is a global loyalty and benefits company. We use our expertise and products to craft customer experiences which enable some of the world’s best known brands to acquire, engage and retain the most demanding and choice-rich customers. In particular, our unique expertise and insight into high earning, frequent travellers allows us to create products and solutions for our clients that inspire greater customer engagement to drive more profitable relationships, enrich their travel experiences, protect what matters and assist in times of need. While specialising in Financial Services, Travel and Retail, we also support clients in multiple sectors.

We have worked with over 90 airlines, 20 hotel groups and more than 600 financial institutions and banks, with clients including Accor Hotels, Air France KLM, American Express, British Airways, Cathay Pacific, Diners Club, Mandarin Oriental, Mastercard, Radisson Hotel Group, Sephora, Visa and Vhi. We take our 30 years’ experience working with these kinds of household names in over 170 countries, and help our clients to deliver the smarter experiences it takes to differentiate their propositions, and help them win deeper devotion with their customers.

Collinson is a privately‑owned entrepreneurial business with 2,000 passionate people working in 20 locations worldwide. Our solutions include Priority Pass, the world’s best known airport experiences programme, while we are also the trusted partner behind many of the leading financial services, airline and hotel brand’s reward programmes and loyalty initiatives.

Purpose of the job

You’ll be at the forefront of designing and delivering cutting‑edge solutions for some of our biggest clients. This isn’t just about advising from the side‑lines, instead, you’ll be deeply involved in shaping technical strategy, personally developing new integrations, and driving innovation in partnership with industry leaders. This is a hands‑on, client‑facing role, blending technical excellence with business impact. You’ll work closely with clients to understand their challenges, craft scalable architectures, and build proof‑of‑concepts that push the boundaries of what’s possible. With a significant pre‑sales element, you’ll also play a key role in demonstrating how our technology can transform their business.

If you thrive in a role that combines engineering, strategic problem‑solving, and direct client collaboration, this is your opportunity to make a real impact to how Collinson partners with its major clients.

Key Responsibilities

• Client Engagement & Solution Design - Work closely with clients to understand business requirements, define architectural solutions, and provide technical guidance throughout the development lifecycle.
• Pre‑Sales & Technical Consultation - Support the sales process by advising on solution feasibility, designing technical approaches, and assisting with RFPs and proposals.
• Proof‑of‑Concepts & Prototyping - Develop POCs and prototypes to validate technical approaches, ensuring solutions are scalable, secure, and aligned with best practices.
• Hands‑On Engineering & Integration - Build and implement custom integrations, APIs, and technical solutions, ensuring seamless interoperability between platforms and third‑party services.
• Technical Leadership & Best Practices - Maintain a high standard of software architecture, coding, and performance optimisation, working closely with our central Software Engineering department.
• Stakeholder Communication - Bridge the gap between technical teams, business leaders, and clients, translating business needs into robust technical solutions.
• E‑Commerce Specialisation - Provide deep technical expertise in e‑commerce platforms, integrations, and modern payment solutions, ensuring client solutions are highly optimised and future‑proof.

Knowledge, skills and experience required

• Our Tech Stack: Typescript (Node.js and React), AWS, Kubernetes, DataDog, GraphQL, PostgreSQL, Mongo, Kafka.
• Strong background in software engineering (at least to Senior Engineer level), cloud architectures, and API design, with experience in building scalable systems.
• Experience leading a software engineering team or initiative that collaborated closely with a customer or client.
• Proven ability to work with clients to define technical solutions, support RFPs, and contribute to the sales cycle.
• Comfortable writing production‑grade code, developing integrations, and working on complex technical challenges.
• Deep understanding of CRMs (such as Salesforce), other e‑commerce platforms, payments, order management, and customer experience optimisation.
• Ability to engage with both technical and non‑technical stakeholders, providing clear explanations and recommendations.
• Experience in quickly building proof‑of‑concepts to validate technical feasibility and demonstrate value to clients.