Senior Software Engineer - B4B

Serko; Auckland; On-site; NZD 130,000 - 190,000; Full time

Benefits offered by this job

Competitive base salary

KiwiSaver & life insurance

Health & wellbeing support

Development opportunities

Job summary

Serko is building a next-generation travel marketplace and seeks a frontend-focused engineer to join the B4B Experience team in Auckland. You will ship customer-facing features using React/Next.js and TypeScript, with C# APIs on the backend, influencing millions of corporate travelers.

You’ll work with Product, Design, and Engineering in an agile environment, embracing AI-assisted workflows, accessibility, and robust engineering standards to deliver reliable, scalable software.

Qualifications

• Shipping customer-facing features with React/Next.js and TS.
• Experience building accessible UIs and semantic HTML.
• Proficient in designing secure, maintainable backend APIs with C#.

Responsibilities

• Partner with Product, Design, and Engineering to ship features impacting customer success metrics.
• Scope work into small, testable slices and deliver accessible UIs with their C# BFF endpoints.
• Work agentically with AI agents via clear context and test-driven requirements.
• Deploy, support, and instrument production code including health and on-call duties.
• Lead small projects, run agile ceremonies, and make autonomous decisions to keep work moving.
• Elevate the team by modeling engineering standards and contributing ideas for process improvements.

Skills

Frontend development

Accessibility

Agile

Collaboration

Tools

React/Next.js

TypeScript

C# API design

Job description

At Serko, we believe something incredible happens when people come face-to-face. That’s why we’re on a mission to engineer a frictionless, next-generation business travel marketplace. We don’t just manage travel; we are leveraging advanced AI and cutting-edge tech to eliminate the complexity of global movement.

When you join Serko, you join a global collective of passionate technologists who show up as their true selves to build world-class products. With established hubs across New Zealand, Australia, North America, India and China - your code and ideas will impact millions of corporate travelers worldwide. If you're ready to challenge the status quo and build the future of travel tech, your next journey starts here.

Reporting to a Senior Engineering Manager or Engineering Manager, you will build in partnership with Booking.com, the B4B Experience encompasses the end-to-end journey for corporate travelers, travel arrangers, and administrators.

With light-touch steering, you raise the craft, accessibility and quality of what customers see and touch. You understand why the work matters, work agentically day to day and ship small changes often.

You’ll belong to the wider B4B Experience team, where we form small, self-organising project teams trusted to own each initiative through to its outcome. Our Platform team owns core domain services; we own everything between them and the customer, including the APIs our experiences depend on.

What you’ll do

• Drive customer value: Partner with Product, Design, and Engineering to ship features that move the needle on customer success metrics.
• Ship end-to-end features: Scope work into small, testable slices and independently deliver accessible, responsive UIs along with their C# BFF endpoints.
• Work agentically: Leverage AI agents effectively by providing clear context, test-driven requirements, and rigorous output verification.
• Own your code in production: Deploy, support, and instrument what you build, covering system health, customer outcomes, and on-call duties.
• Lead and decide: Lead small projects, run agile ceremonies, and make autonomous, reversible decisions to keep work moving.
• Elevate the team: Model strong engineering standards and actively contribute ideas that improve how the team operates.

At Serko, we aim to create a place where people can come and do their best work. This means you’ll be operating in an environment with great tools and support to enable you to perform at the highest level of your abilities, producing high-quality and delivering innovative and efficient results. Our people are fully engaged, continuously improving, and encouraged to make an impact.

What you’ll bring

• Core stack experience: A proven track record of shipping customer-facing production features using React/Next.js and TypeScript, plus experience building APIs in C# (or a similar backend language).
• Frontend excellence: A strong grasp of accessibility fundamentals, including semantic HTML, keyboard navigation, and ARIA.
• Pragmatic engineering: The ability to design simple, secure, and maintainable solutions. You balance speed with quality and rely on tests, metrics, and dashboards to ensure reliability.
• Agentic growth mindset: You take ownership of your career and deeply understand the code you ship, ensuring your engineering judgment scales alongside your use of AI agents.
• Collaborative spirit: You elevate the team by participating in technical discussions, supporting peers through code review, and building alignment with an awareness of others' perspectives.

Some of the benefits of working at Serko are:

• A competitive base salary
• KiwiSaver covered with employee contributions matches up to 3.5% of salary, and life insurance.
• Health & Wellbeing: Discounted Southern Cross Health Insurance, access to confidential support, guidance and counselling service, wellbeing and voluntary leave, and free flu shots.
• Focus on development: Access to a learning & development platform, committed budget and opportunity for you to own your career pathways.