At a Glance
- Tasks: Optimise high-performance systems and enhance software efficiency for global clients.
- Company: Dynamic tech company focused on innovation and collaboration.
- Benefits: Competitive salary, market-leading bonuses, flexible hybrid work, and mentorship opportunities.
- Other info: Join a collaborative environment with excellent career growth potential.
- Why this job: Make a real impact on system performance while shaping future engineering leaders.
- Qualifications: Experience in Python, Java, or C#, with strong performance tuning skills.
The predicted salary is between 72000 - 96000 £ per year.
We’re looking for a Software Engineer to join a team that specialise in optimising large-scale, high-performance systems used by demanding clients worldwide. You’ll work across the full delivery lifecycle, from profiling and tuning code, to rethinking architectures ensuring software runs with maximum speed, minimal memory usage, and rock-solid scalability.
This is a hands-on role where you’ll dive deep into complex systems, identify bottlenecks, and implement improvements that make a measurable difference for clients.
What you’ll be doing:
- Profiling and optimising existing code to boost performance and reduce memory footprint
- Designing and implementing performance enhancements for high-throughput, low-latency systems
- Working with Product, Engineering, and Clients to understand and meet performance targets
- Creating and maintaining automated performance and load testing frameworks
- Mentoring engineers on writing efficient, scalable, and maintainable code
- Contributing to architectural decisions that directly impact performance and reliability
What we’re looking for:
- Solid experience in software engineering with strong experience in Python, Java, or C#
- Proven track record of performance tuning in large-scale, distributed systems
- Expertise in profiling tools, memory management, and debugging complex performance issues
- Strong database optimisation skills (Postgres, SQL Server, or similar)
- Experience with containerised and cloud-native environments (Kubernetes, Docker, AWS, Azure)
- Familiarity with load testing tools (e.g. k6, JMeter, Gatling) and monitoring solutions
- Excellent communication skills to work with both technical and non-technical stakeholders
What’s on offer:
- Collaborative environment where technical excellence and innovation are valued
- Projects that make a visible impact on system speed, efficiency, and scalability
- The opportunity to shape system architecture and mentor future engineering leaders
- Flexible Hybrid working in Central London
- Up to £85,000 basic plus market leading bonus structures
If you’re passionate about pushing the boundaries of performance engineering and building software that scales effortlessly, we’d love to hear from you.
Software Engineer in London employer: Harrington Starr
Harrington Starr is an exceptional employer, offering a dynamic work environment where innovation and collaboration thrive. As a Dynamics CRM Developer, you will have the opportunity to work with cutting-edge technologies like Azure and Power Platform, while benefiting from a culture that prioritises professional growth and development. Located in a vibrant area, the company fosters a supportive atmosphere that encourages creativity and teamwork, making it an ideal place for those seeking meaningful and rewarding employment.
StudySmarter Expert Advice🤫
We think this is how you could land Software Engineer in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Harrington Starr or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Harrington Starr.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Harrington Starr.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Harrington Starr that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Software Engineer in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Harrington Starr.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Harrington Starr and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Harrington Starr
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Harrington Starr uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
