Staff Fullstack Software Engineer

Senior/Staff Fullstack Software Engineer

Location: Fitzrovia, London (Hybrid – 4 days in office, 1 day remote)

We are:

Wizeline, a global AI-native technology solutions provider, develops cutting-edge, AI-powered digital products and platforms. We partner with clients to leverage data and AI, accelerating market entry and driving business transformation. As a global community of innovators, we foster a culture of growth, collaboration, and impact.

With the right people and the right ideas, there’s no limit to what we can achieve.

Are you a fit?

Sounds awesome, right? Now, let’s make sure you’re a good fit for the role:

We are looking for a Senior or Staff Fullstack Software Engineer to work with one of our most important clients in London. In this role, you will build scalable, high-performance services that power the company’s next-generation financial platform. This includes applications for deal execution, invoicing, payment distribution, and financial reporting. You’ll play a critical role in architecting backend systems, integrating with external platforms, and delivering features that support complex revenue and transaction workflows across the business.

This position follows a hybrid work model based in Fitzrovia (London), with four (4) days per week in the office and one (1) day working from home.

Key Responsibilities

• Design and implement services that support revenue workflows, payment logic, and invoicing pipelines

• Build robust APIs and full-stack features, leveraging type-safe ORM tooling for schema management and query composition

• Own integration with internal systems (e.g., Salesforce, NetSuite) and external providers (e.g., banks, payment processors)

• Implement structured financial logic such as contingent payments, commission calculations, and milestone-based billing

• Integrate AI/LLM capabilities using Claude (Anthropic) and leverage Cursor as a core development tool to accelerate delivery

• Build and deploy infrastructure in AWS

• Translate complex business rules into deterministic backend logic: commissions, milestones, payee splits, and contingent payments.

• Implement robust data flows between Client Processing, Deal Management, and Authoritative Data domains.

• Work closely with product managers, architects, and finance stakeholders to deliver end-to-end features

Must-have Skills

• 7+ years software engineering experience with a focus on backend/full-stack development

• Experience with a TypeScript-native ORM in production (Drizzle or Prisma strongly preferred); comfort owning schema migrations, relations, and query optimization

• Deep experience with Node.js, GraphQL, and PostgreSQL in production environments

• Hands-on expertise with AWS services: EC2, Lambda, RDS, S3, IAM

• Familiarity with event-driven systems (Kafka, SQS, or similar), API integrations, and microservice patterns

• Strong understanding of data modeling, transaction workflows, and secure service architecture

• Comfortable working across systems where compliance, auditability, and financial accuracy are critical

Nice-to-have

• Experience with financial systems (payments, trust accounting, GL integration, revenue recognition)

• Familiarity with Salesforce, NetSuite, Concur, or related business platforms

• Experience with serverless architecture and FaaS patterns

• Understanding of multi-party payments, invoicing workflows, or tax handling (e.g., 1099s, VAT)

• Familiarity with Anthropic's Claude API and AI-assisted development tools like Cursor; experience integrating LLM capabilities or shipping AI-powered features

• AI Tooling Proficiency: Ability to leverage one or more AI tools to optimize and augment day-to-day work, including drafting, analysis, research, or process automation. Provide recommendations on effective AI use and identify opportunities to streamline workflows.

What we offer

• A High-Impact Environment

• Commitment to Professional Development

• Flexible and Collaborative Culture

• Global Opportunities

• Vibrant Community

• Total Rewards

Specific benefits are determined by the employment type and location.

Find out more about our culture here.