Principal Software Engineer

Principal Software Engineer

Full-Time 78000 - 130000 £ / year (est.) Home office (partial)
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At a Glance

  • Tasks: Lead the design and implementation of full-stack applications using Java, Python, and React.
  • Company: Global consultancy modernising technology for major organisations.
  • Benefits: Strong people-focused benefits, work-life balance, and growth opportunities.
  • Why this job: Shape the future of tech while mentoring teams and tackling complex challenges.
  • Qualifications: Senior full-stack engineering experience with proficiency in Java and Python.
  • Other info: Dynamic environment with a focus on innovation and career development.

The predicted salary is between 78000 - 130000 £ per year.

Harvey Nash have partnered with a global consultancy that helps major organisations modernise their technology, build scalable digital products, and tackle complex engineering challenges. They partner with brands across finance, retail, tech scale‑ups and highly regulated environments delivering high‑impact solutions at speed.

They are hiring multiple Principal Engineers, people who can lead architecture and delivery, advise clients at a senior level, stay hands‑on with modern engineering, and shape the technical direction of major projects.

What You'll Be Doing

  • Lead the design and implementation of full-stack applications using technologies like Java, Python and Typescript.
  • Have experience or exposure to frameworks like Spring, Flask and React.
  • Acting as a senior technical consultant, guiding clients through complex engineering decisions.
  • Mentoring and uplifting engineering teams, driving best practice across delivery.
  • Owning architectural decisions and contributing to long-term technical strategy.
  • Ensuring engineering excellence via code reviews, design governance and DevOps/Agile practices.
  • Managing delivery expectations, timelines and stakeholder relationships.

What They're Looking For

  • Essential:
  • Strong background as a senior/principal full‑stack engineer (backend + frontend).
  • Proficiency in Java, Python, JavaScript/TypeScript or similar.
  • Understanding of AI‑powered development practices and how they improve the SDLC.
  • Expertise in software design patterns, architecture and scalable system design.
  • Experience leading engineering teams, coaching developers and influencing technical direction.
  • Strong consulting mindset - able to translate complex problems into clear solutions.
  • Proven experience in Agile environments and modern DevOps workflows.
  • Desirable:
  • Cloud experience (AWS, Azure or GCP) - including serverless.
  • Knowledge of Docker, Kubernetes or other container technology.

What Makes This Opportunity Stand Out

This consultancy offers one of the strongest people-focused benefits packages in the market. Highlights include:

  • Work-Life Balance & Time Off
  • Growth & Development
  • Health & Wellbeing
  • Financial Benefits
  • Discretionary bonus scheme

Principal Software Engineer employer: Harvey Nash Group

Join a leading global consultancy in London as a Principal Software Engineer, where you will not only tackle complex engineering challenges but also enjoy a people-focused benefits package that prioritises work-life balance and professional growth. With opportunities for mentoring and shaping the technical direction of major projects, this role offers a dynamic work culture that values innovation and collaboration, making it an excellent choice for those seeking meaningful and rewarding employment.
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Contact Detail:

Harvey Nash Group Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Principal Software Engineer

✨Tip Number 1

Network like a pro! Reach out to your connections in the industry, attend meetups, and engage with online communities. You never know who might have the inside scoop on job openings or can refer you directly.

✨Tip Number 2

Show off your skills! Create a portfolio showcasing your projects, especially those using Java, Python, and React. This will give potential employers a taste of what you can do and set you apart from the crowd.

✨Tip Number 3

Prepare for interviews by brushing up on your technical knowledge and soft skills. Practice common interview questions and scenarios related to full-stack development and consulting. Confidence is key!

✨Tip Number 4

Don’t forget to apply through our website! We’ve got loads of opportunities that might be perfect for you. Plus, it’s a great way to ensure your application gets seen by the right people.

We think you need these skills to ace Principal Software Engineer

Full-Stack Development
Java
Python
JavaScript
TypeScript
React
Spring
Flask
Software Design Patterns
Scalable System Design
Agile Methodologies
DevOps Practices
Cloud Technologies (AWS, Azure, GCP)
Docker
Kubernetes

Some tips for your application 🫡

Tailor Your CV: Make sure your CV reflects the skills and experiences that match the job description. Highlight your full-stack experience with Java, Python, and React, and don’t forget to mention any leadership roles you've had in engineering teams.

Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you’re the perfect fit for the Principal Engineer role. Talk about your consulting mindset and how you’ve tackled complex engineering challenges in the past.

Showcase Your Projects: If you’ve worked on relevant projects, make sure to include them in your application. Whether it’s a personal project or something from your previous job, showing off your hands-on experience with modern engineering practices can really set you apart.

Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you don’t miss out on any important updates during the process!

How to prepare for a job interview at Harvey Nash Group

✨Know Your Tech Stack Inside Out

Make sure you’re well-versed in Java, Python, and React, as these are key to the role. Brush up on frameworks like Spring and Flask too, as they might come up during technical discussions.

✨Showcase Your Leadership Skills

Prepare examples of how you've led engineering teams or mentored junior developers. Highlight your experience in guiding clients through complex decisions, as this consultancy values a strong consulting mindset.

✨Understand Agile and DevOps Practices

Familiarise yourself with Agile methodologies and modern DevOps workflows. Be ready to discuss how you’ve implemented these practices in past projects to ensure engineering excellence.

✨Prepare for Architectural Discussions

Think about architectural decisions you've made in previous roles. Be prepared to discuss your approach to scalable system design and how you’ve contributed to long-term technical strategies.

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