Sr. Software Engineer (Full-stack)

Navan
London, GB
On-site

Who this role is best for

Aimed at mid-level full-stack engineers with Java and React expertise who thrive in mentoring roles within travel tech.

Best fit for

  • Experienced full-stack engineers comfortable leading technical strategy across backend and frontend.
    — “Lead technical strategy and architecture for core backend and frontend components
  • Developers who enjoy mentoring and raising technical standards across teams.
    — “Mentor and coach engineers across the organization
  • Candidates with a track record of designing scalable distributed systems.
    — “Proven experience designing and evolving large-scale distributed systems

Things to consider

  • Expectation to influence cross-functional teams beyond pure engineering.
    — “Influence cross-functional teams (engineering, product, design)
  • Requires ownership of complex domains from design through ongoing evolution.
    — “Own complex domains end-to-end

How to stand out

  • Showcase specific examples of architectural trade-offs in past projects.
    — “making architectural trade-offs and long-term design decisions
  • Highlight initiatives where you aligned technical execution with business goals.
    — “aligning technical execution with business goals
  • Demonstrate AWS experience beyond basic deployment knowledge.
    — “Experience with cloud platforms (AWS preferred)
Pace · Fast PacedCollaboration · HighAutonomy · HighDecision Impact · TeamLevel · Mid Level

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • lead technical strategy and architecture
  • mentor and coach engineers
Typical background
5+ years of software development experiencedeep expertise in backend and frontend systems

Skills & requirements

Required

Backend And Frontend DevelopmentMicroservice ArchitecturesCloud PlatformsMentoring

Preferred

Ai/ml ExpertiseDevops Practices

Stack & domain

Backend DevelopmentFrontend DevelopmentMicroservicesCloud Platforms (aws)Ci/cd PipelinesDevOpsJavaSpring BootReactAngularTypeScriptCommunicationLeadershipSoftware EngineeringCloud Computing

About the role

Original posting from Navan

We believe “It’s all about the user. All of them.” We’re passionate about providing a seamless one-stop experience for business travelers, no matter how they travel, where they stay, or where they’re going.

We are looking for a Sr. Full-Stack Engineer to lead the design and development of mission-critical product features and services that power our platform, used daily by thousands of travelers worldwide. You will play a pivotal role in shaping technical direction, mentoring engineers, and driving cross-team initiatives to deliver scalable, reliable, and user-focused solutions.

What You’ll Do

Lead technical strategy and architecture for core backend and frontend components of the platform, ensuring scalability, reliability, and performance.

Own complex domains end-to-end: from design through development, launch, and ongoing evolution of key microservices and customer-facing features.

Influence cross-functional teams (engineering, product, design) by aligning technical execution with business goals and long-term product vision.

Raise the technical bar through code reviews, architectural guidance, and fostering best practices in testing, monitoring, and documentation.

Mentor and coach engineers across the organization, helping to grow technical skills and leadership capabilities.

Partner with leadership to define and execute a multi-year technical roadmap, ensuring that platform investments support company growth at scale.

What We’re Looking For

5+ years of software development experience, with deep expertise in both backend and frontend systems.

Strong programming skills and CS fundamentals, with mastery in at least one backend language (Java, Python, etc., preference: Java and Spring Boot) and modern frontend frameworks (React, Angular, TypeScript).

Proven experience designing and evolving large-scale distributed systems and microservice architectures.

Demonstrated ability to own technical domains, making architectural trade-offs and long-term design decisions.

Experience driving cross-domain initiatives, coordinating with multiple teams to deliver cohesive solutions.

Track record of mentoring engineers, leading technical discussions, and influencing outcomes at an organizational level.

Experience with cloud platforms (AWS preferred), CI/CD pipelines, and modern DevOps practices.

Passion for solving complex problems, continuously learning, and delivering customer-focused innovations.

Excellent communication skills with the ability to influence technical and non-technical stakeholders alike.

Source: Navan careers

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