2,997 Principal Full Stack Engineer Crash Reporting System jobs in the United Kingdom

We’re looking for a Full-Stack Software Engineer (2–4 years experience) to join our Platform Performance team and help us deliver lightning-fast, scalable experiences to millions of users around the world.

In this role, you’ll work across the stack—sharpening frontend speed, optimizing backend services, and making our user interfaces more responsive, reliable, and delightful to use. You’ll collaborate with passionate engineers and product managers to identify performance bottlenecks, contribute to architectural improvements, and help evolve our design system.

This is a fantastic opportunity for an ambitious engineer looking to build their skills in a fast-paced environment and make a meaningful impact at scale.

Freelancer.com is the world's largest freelancing and crowdsourcing marketplace, connecting over 80 million users across 247 countries, regions, and territories. Our platform enables businesses, entrepreneurs, and individuals to collaborate with skilled professionals from anywhere in the world, turning ideas into reality faster than ever before.

Our mission is bold: to create one billion jobs globally by empowering people to work for themselves and build sustainable careers online. Every feature we ship and every performance improvement we make brings us one step closer to enabling opportunity at an unprecedented scale.

• Identify and solve performance issues across both frontend (Angular) and backend (PHP, Python, Go).
• Optimize page load speed, rendering performance, and API response times.
• Contribute to our design system and build reusable UI components using Angular and TypeScript.
• Help maintain and evolve scalable backend systems for high-performance APIs.
• Collaborate with cross-functional teams to implement best practices in performance, usability, and accessibility.
• Participate in architecture discussions and continuously improve our codebase and tooling.
• Promote and support performance monitoring and testing practices.

• 2–4 years of professional experience as a full-stack or frontend engineer.
• Solid experience with Angular and TypeScript.
• Comfort working with backend technologies like PHP, Python, or Go.
• A good understanding of frontend performance optimization techniques.
• Familiarity with RESTful API design and backend performance considerations.
• Experience building and maintaining reusable UI components.
• Exposure to design systems or component libraries.
• Strong communication skills and a collaborative mindset.
• A proactive attitude, with the ability to take ownership and see tasks through.

• Understanding of accessibility and UI/UX design principles.
• Familiarity with SEO and frontend performance metrics.
• Experience with automated testing (Jest, Cypress, PHPUnit, etc.).
• CI/CD or DevOps knowledge.
• Open-source contributions or personal projects.

• Work on a platform with global impact—we’re on a mission to create one billion jobs.
• A culture that values ownership, transparency, and meritocracy.
• Fast-track your growth with mentorship, real ownership, and exposure to internet-scale challenges.
• Weekly CEO town halls, quarterly hackathons, and team events to keep you engaged and inspired.
• A chance to help build the tools and systems that power the next generation of our platform.

Founded in 2011, Fasanara is a global asset manager and technology platform.

We manage c. USD 5 billion AUM (as of June, 2025) in Fintech strategies on behalf of pension funds and insurance companies in Europe and North America, and a mandate from the European Investment Fund (EIF).

We are a pioneer investor in Fintech Lending, enabling Real Economy Impact.

Fasanara manages one of the largest and longest standing Fintech Lending fund in Europe and invests in early-stage Fintech companies via its venture capital vehicles, using its central role in the Fintech ecosystem to identify and back revolutionary new businesses.

The role

Our Tech Team at Fasanara is looking to bring onboard a senior Full-Stack Engineer who will be essential in expanding the capabilities across our investment tools, working on several Greenfield projects. You’ll have the opportunity to partner across multiple business areas building scalable innovative solutions. This role would suit an ambitious, seasoned engineer who wants to be part of an expanding engineering team having a big impact.

Responsibilities

• Design and develop scalable, high-performance internal platforms and applications for core business functions including Credit Trading, FX Hedging, Portfolio Monitoring, and Treasury.

• Collaborate cross-functionally with investment, operations, and data teams to translate complex business workflows into efficient, maintainable software solutions.
• Drive the full software development lifecycle - from technical design and implementation to testing, deployment, and production monitoring.
• Contribute across the stack, including backend services, frontend interfaces, and data engineering pipelines as needed.
• Provide technical leadership and mentorship to more junior team members, fostering a culture of learning, accountability, and continuous improvement.

Requirements

• A degree in Computer Science, Engineering, or a related technical field, or equivalent hands-on experience in a professional environment.
• Proven experience designing and developing robust APIs, microservices, and backend systems that power business-critical workflows.
• Experience with at least one of the following languages: Go, Python, Java, C#, or C++. We primarily use Go and Python — familiarity with these is a strong advantage.
• Solid knowledge of relational databases and proficiency in SQL (e.g., MySQL).
• Practical experience in modern front-end technologies including TypeScript, React, and CSS.
• Experience architecting solutions using cloud infrastructure, particularly AWS.
• Competency with standard development and collaboration tools (e.g., Git, GitLab, CI/CD workflows).
• Excellent communication and stakeholder management skills; you’re comfortable discussing technical trade-offs with both engineers and non-technical colleagues.
• Bonus: A portfolio, GitHub profile, or examples of personal projects that showcase your technical abilities and creativity.

Benefits

• Competitive bonus scheme.
• Bupa health & dental, Cycle to Work scheme, enhanced pension, and generous annual leave.
• Enhanced parental leave, special leave allowances, and charity giving options.
• Regular team events, legendary summer & Christmas parties, knowledge sharing sessions, and quarterly town halls.
• Team lunches, dinners, Friday drinks, team sport activities.

Salary: £50,000-£70,000 depending on experience

Location: Scotland (Edinburgh / Glasgow), remote with occasional in-person sessio ns

Reports to: Lead Software Engineer

Introducing hyble!  

Things move quickly at hyble! We're a team of passionate individuals who love what we do and are always striving for the best. If you're looking for a company that values your contributions and offers exciting challenges, this might be the place for you.

We're a fast-growing marketing technology company serving customers in over 50 countries.  

Just six years ago, we were a tight-knit team of 12 crammed into a tiny office in a start-up incubator. Fast forward to today, and we’ve transformed into a dynamic team of over 90 passionate individuals spanning three continents partnering with some of the world's biggest alcoholic beverage brands. 

Right now, we’re expanding rapidly into North America as a result of signing a transformational contract with the largest Wine and Spirits Distributor in the USA, who also happens to be the 11th biggest privately owned company in the US.  

Our Purpose  

Our goal is to create a lasting positive impact by disrupting a traditional industry that’s operated the same way for over 50 years.  

It blows our minds that sales reps have to spend weeks creating something as simple as a poster. And we’re horrified by the amount of obsolete Point of Sale we see being sent to landfill. So, we're on a mission to solve these issues once and for all. 

Our technology platform “Hyble” empowers sales reps in the beverage industry to create on-demand marketing materials that are both brand-compliant and tailored for the specific account. Combined with our enterprise services, which enable the change management process and our cloud printing model that enables rapid turnaround print, we have a game-changing solution that the market is screaming out for. 

This innovative approach makes sales reps lives easier by allowing them to support more accounts in less time while also drastically reducing the production of generic marketing content that often ends up in landfill. 

What  it's really like to work here  

Working with us is a long way from your average job – it's a unique opportunity to collaborate with brilliant people and be part of what could be the most significant chapter of your professional life.  It's where you can realize your full potential, take responsibility, and make a huge impact.  

Here's a glimpse of what it's really like to be a part of Hyble: 

• Fast-Paced: Our growth is lightning-fast, and the to-do list is never-ending. 

• Continuous Innovation: We're constantly building and improving our product, systems, and processes. We’re never done. 

• Starting from Scratch: We're building supply chains, teams, processes, and systems from the ground up. 

• Rapid Expansion: Our organization chart gets a makeover every 30 days as we add new people, teams, and capabilities. 

• Resourceful: We’ve got the backing of big-name investors but capital efficiency is in our DNA so we’re mindful of every dollar, euro, or pound spent. 

• Global Reach: We work across multiple time zones – we've got customers all over the world.  

• Versatility: We wear many hats and take on tasks that go way beyond our job descriptions.  

• Dynamic Environment: We’re in the “messy middle” of the scaling journey so things can get a bit messy and chaotic at times. 

• Rewarding: But above all, it's incredibly rewarding, engaging, energetic, exciting, and a lot of fun.  

Who we’re looking for; 

We’re looking for passionate, innovative thinkers—those who see things differently and are excited by the opportunity to tackle real challenges. We want people who are eager to push boundaries, embrace learning every day, and are motivated to help us build something truly impactful.

Above all, we’re looking for individuals who embody our values:

• “We’re a Team” 

• “We’re Humble” 

• "We’re Resilient”

• "Be Yourself” 

Our work ethic at Hyble 

Our values drive our work ethic. We are looking for people who operate this way as a default setting. 

• Commitment: We're fully committed to our vision, goals and each other. 

• Hands-On: We're not afraid to get our hands dirty. 

• Team-First: We believe in collaboration. We prioritise the team’s collective success over individual interests, with respect for each person’s contribution.

• Hard Work: We’re dedicated to delivering our very best, ready to go above and beyond when needed, without compromising personal well-being.

• Responsible: We treat company resources like they're our own. 

• Progress, not perfection : We focus on progress and results, not perfection. We make steady gains each day and work to find efficient, sustainable approaches to achieve our goals.

• Accountability: We take ownership and responsibility for our work, supporting each other to learn from mistakes and achieve success together.

• Ambitious: We’re driven to make a big impact.

• Initiative: We try to see around corners, spot opportunities, and find innovative solutions to challenges.  

• Growth Mindset: Sometimes we don't get it right, and that's fine, so we like to take learnings from these to help empower and better the team. We’re always learning. 

• Challenge Convention: We question the status quo, always considering new and better ways to move forward.

• Empathy: We deeply care about and respect our colleagues, customers, and suppliers.
  

If this resonates with you, then read on to discover more about the role you could play in our journey.

What you’ll do

As a Senior Full Stack Engineer at hyble, you’ll be at the forefront of delivering impactful features and technical improvements, working on front-end and/or back-end systems to shape our products and architecture. Your skillset may be specialised towards front-end or back-end development, but we encourage contributing across the whole stack, helping us deliver the most value to our users. 

In this role, you’ll collaborate closely with our design, product, and engineering teams to create and optimize solutions that align with our technical vision. You’ll contribute to defining and building scalable, maintainable architecture using Python on the back-end and/or React with TypeScript on the front-end. 

If you’re passionate about creating exceptional user experiences and solving complex technical problems, we’d love for you to apply. Join us in transforming our product and internal tooling with high-quality, innovative engineering solutions. 

What your responsibilities will be:

Feature Development  

• Own and deliver major features or components, ensuring high-quality execution from conception to deployment. 

• Collaborate with cross-functional teams to design, develop, and implement features for our user-facing products and internal tools. 

• Build high-quality, maintainable, and scalable solutions using .NET Core and/or React/TypeScript. 

Architectural Influence   

• Shape and enhance our system architecture to support future growth, performance, and scalability. 

• Contribute to long-term technical direction and system design, making thoughtful decisions about trade-offs. 

Prototyping and Innovation   

• Identify and reduce technical debt, ensuring maintainability and scalability of the codebase. 

• Prototype and develop innovative solutions that enhance our platform, demonstrating new features or technical capabilities. 

• Advocate for continuous improvement in engineering practices and process. 

Code Quality and Optimization   

• Drive improvements in performance, security, and reliability across the stack. 

• Debug, optimize, and fine-tune full-stack solutions to ensure robust performance and responsiveness. 

• Implement best practices for coding standards, testing, and quality assurance. 

Mentorship & Collaboration  

• Act as a mentor, providing guidance on best practices, architecture, and problem-solving, and actively participate in upskilling engineers of all experience levels. 

• Collaborate across teams, working closely with other engineers, product managers, and designers to define and implement solutions. 

What you’ll bring  

• Full Stack Technical Expertise: Strong production-grade experience with both front-end (React, TypeScript) and Python. 

• System Design: Ability to design and implement complex systems with a focus on performance, maintainability, and scalability.  

• Collaboration Skills: Thrive in a collaborative environment, working closely with design, product, and engineering teams to deliver impactful features.  

• Problem-Solving Ability: Combine creativity with a pragmatic approach to solving real-world problems, delivering exceptional user experiences.  

• Excellent Communication: Strong communication skills to work effectively with technical and non-technical stakeholders.  

• Agile Experience: Familiar with Agile software development practices and thrive in a fast-paced, iterative environment.  

• Commitment to Learning: Desire to grow professionally, with opportunities for ongoing training and educational development. 

• Utilising LLMs : Hands-on experience with calling and integrating Large Language Models (LLMs) into applications, or personal projects demonstrating an understanding of techniques such as RAG, MCP and prompt engineering. 

Nice to haves  

• Cloud Expertise: Much of our infrastructure is hosted on Azure with some data storage on AWS. Experience of either of these platforms would be good.  

• SQL/Databases: We leverage Entity Framework heavily, but knowledge of how databases work under the hood is helpful when troubleshooting performance issues. 

• .NET Expertise: .NET Core, Entity Framework. 

The knowledge and skills we have listed represent “the perfect candidate.” No one’s perfect and we know the ‘confidence gap’ can stop brilliant people applying. If you love the sound of this opportunity please apply, we would love to hear from you.

You could belong here;   

To deliver brilliant marketing to Hyble’s global drinks suppliers and their customers, we need to build a company that’s reflective of their diversity.  We’re building an inclusive workplace that promotes and values difference, where everyone, from any background, can do their best work and be proud to belong.  

What we’ll offer

As well as your salary;

• Pension . A combined contribution of up 12% of your salary for your future.

• Reward and Recognition. A bonus scheme based on company performance, with regular recognition along the way.

• Holidays . 33 days including public holidays, with options to buy or sell extra days.

• Giving back. 2 paid days leave to support a charity of your choice

• Wellbeing. We'll support you in looking after your health and wellbeing so you can do your best work. We provide coaching and counselling on demand through our wellbeing partners, Plumm.

• Health Days. 2 full days or 4 half days to take when you need to refuel and recharge.

• Collaboration opportunities . Flexibility to work remotely, with opportunities to collaborate with colleagues and contribute to our culture.

• Grow with us . You'll have opportunities to develop your career in a high pace technology company as part of a great team.

• Personal Investment . We'll invest in your personal development and give you regular feedback.

• Developer Toolbox. We pay for licenses, so all our Developers have access to a toolbox of best in class development tools.

• Open culture . A place where you can bring new ideas, try doing things differently, and have a real impact.

For more information about us visit: or check out our socials.

As part of the strategy around Go.Compare ’s acquisition by Future we’re putting in a technology roadmap for re-platforming our domain around an API-first, cloud-based serverless architecture to become the leading PCW service.  This is part of our plan to broaden the scope from the Go.Compare brand.

What you'll be doing.

As a Software Engineer, you will be the backbone of the team building our new systems while also being able to input into the architecture and design.  You will work with engineers at all levels to deliver our platform and meet both the customers' and our needs.

You will ensure changes are scalable, tested, and developed following best practices, and that we are always improving our codebase.

You will be reporting to your Tech Lead and working with Engineering, Product, UX, QA, and Project Management (PMO) teams you will ensure that all applications integrate reliably.

You will follow our standard practices and input into how they can be improved and kept up to date with the latest tools and methods.

Main Responsibilities

• In collaboration with Tech Leads, and other Engineers you will ensure your code is well-scoped, estimated, monitored, documented, and tested.
• You will be responsible for your code quality, ensuring that the code is maintainable
• You will help trace bugs across the stack and ensure that suitable tests are set up to avoid future regressions.
• You will keep up to date with the latest approaches to development and be able to argue for appropriate technology to be added to the stack.
• You will participate in regular hack days, using the latest tech to prototype approaches to business/technical goals.
• As a mid-engineer, you are required to support and help develop more junior members of staff both through code review/direction and mentoring.
• In collaboration with the QA Engineers and the other Engineers, you will write automated tests ensuring that our tests are valuable, add to our regression pack, and ensure that our deployments through our CI/CD process are stable.
• You will ensure our monitoring requirements are met, through appropriate frameworks and coded solutions.

Experience that will put you ahead of the curve.

• .NET Core
• JavaScript (ES6+) / TypeScript
• Node JS
• Azure Services
• Git
• SQL
• Application monitoring practices, such as metrics, tracing, and logging
• 3+ years of experience with performance optimisation and debugging techniques; including Google Web Vitals and advanced Chrome Dev Tools (e.g. flamegraphs, profiling) 
• Experience with testing frameworks (e.g. XUnit, Jest, Enzyme, React Testing Library & Nightwatch)
• Experience in building software through a test-first approach (TDD, BDD)
• Experience with build and deployment pipelines (CI/CD) using Azure DevOps
• Knowledge of Modern Architecture (Headless APIs, Microservices, Eventing/Messaging, Streams)
• ReactJS (Hooks & Context API)
• Experience communicating updates and resolutions to customers and other partners technical information to non-technical people

What's in it for you…

We have several awesome perks available to our staff. We offer huge opportunities to learn and develop, whether through professional qualifications, exposure to incredible business projects, or informal lunch and learns, hosted by your colleagues. We have a fantastic culture where we do care about our people and want everyone to succeed. Varied roles mean you’re not pigeonholed into one finite area but get the opportunity to develop a wide range of experiences

Internal job family level T6

The expected range for this role is £33,000 - £50,000

This is a UK remote-based role

Wh o are we…

We’re Future. We have 3000+ colleagues over 250+ brands speaking to 400 million people every month across the globe through websites, events, and magazines. We’ve got ambitious plans that build on our growth momentum and unlock new opportunities and we’re looking for accomplished people who want to be a part of it.

Want to know more…

Our Future, Our Responsibility - Inclusion and Diversity at Future

We have a voice and we’re going to use it. We promote diversity and inclusion not just in our recruitment processes, but everything we do. We’re an equal opportunity employer and we will continue to ensure our recruitment process is free of bias and our workplaces are inclusive, positive, free of discrimination, and respectful of all backgrounds and beliefs. Our culture is underpinned by our values and employees - current and future - are treated with respect and fairness.

Please let us know if you need any reasonable adjustments made so we can give you the best experience!

Find out more about Our Future, Our Responsibility on our website.

#LI- HLK

Requirements

Benefits

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