At a Glance
- Tasks: Build impactful software for UK police forces using cutting-edge technologies.
- Company: Join a dynamic public safety tech company with a startup vibe in Central Manchester.
- Benefits: Enjoy 28 days holiday, private health insurance, and a competitive salary package.
- Other info: Collaborative team culture with excellent growth opportunities and biannual hackathons.
- Why this job: Make a real difference in public safety while working with innovative AI tools.
- Qualifications: Experience in software engineering and a passion for clean, maintainable code.
The predicted salary is between 90000 - 125000 £ per year.
Applicants must be authorized to work for any employer in the country in which the role is being hired. We are unable to sponsor or take over sponsorship of an employment visa at this time.
Mark43 is a public safety technology company trusted by over 200 police forces worldwide. We build cloud-native software on AWS that police forces and emergency services rely on in their most critical moments, from managing custody records to dispatching officers in the field. Our UK team of 25 is based in Central Manchester, helping British police forces replace outdated, fragmented systems with modern, resilient software. We are part of a 400-person global company, but the UK team operates with startup energy: small enough that your work is visible, big enough that you are backed by serious investment. We are hiring Senior Software Engineers who want to build systems that genuinely matter.
What You'll Do
- You will work across the full stack, building the software that UK police custody suites depend on every day. Our team owns features end-to-end, from database migration to UI and our stack includes:
- Frontend: React, TypeScript
- Backend: Java, Spring Boot
- Data: MySQL, GraphQL
- Infrastructure: AWS, Kubernetes, Argo CD, Terraform
- Observability: Datadog
We are also genuinely investing in how AI changes the way we build software. We do not just use Copilot for autocomplete. We are building agentic workflows into our development process, using tools like Claude Code to automate routine work, accelerate code review, and let engineers focus on the problems that actually need human judgement. If you are excited about shaping how a team works with AI, not just using it, this is the place.
If you were on the team last week, you might have:
- Designed and shipped a new workflow for custody officers processing detainees, from GraphQL schema through to React components
- Investigated a production issue using Datadog traces and logs, then pushed a fix the same day
- Paired with a teammate to untangle a tricky state management problem in a booking form
- Built an agentic workflow that reviews PRs, learns from human feedback, and posts weekly engineering highlights to Slack, all automatically
- Managed a cross-team feature end-to-end — designed the architecture, broke work into parallel workstreams, and coordinated junior engineers to deliver on time
- Reviewed a pull request, spotted a change that would unintentionally affect other parts of the app, and directed a safer approach in the comments
- Prototyped a new idea at one of the hackathons we run twice a year, a chance to experiment with new tech, explore wild ideas, and ship something fun with no constraints
What You'll Need
- You write clean, maintainable code and care about the impact of your work. We are an AI-first team. AI tools are part of how we work every day — writing code, reviewing pull requests, investigating issues, and automating routine work. We expect you to be comfortable working alongside AI and keen to push what is possible with it.
- You should have:
- Professional software engineering experience, including ownership of complex systems and delivery of large-scale technical initiatives
- Experience mentoring and supporting other engineers
- Strong technical judgement and the ability to make architectural decisions
- Experience leading projects across multiple teams or domains, influencing technical direction beyond your immediate area
- A strategic mindset, with the ability to balance immediate delivery with long-term technical health
- Experience with our stack: Java, JavaScript, TypeScript + React, and MySQL
- Experience with AI-assisted development tools like Claude Code and how they can improve your workflow
- A strong sense of ownership and accountability for both technical outcomes and team success
- Confidence operating in ambiguous environments and helping teams navigate technical trade-offs
- A collaborative mindset and strong communication skills
What We Offer
- 28 days holiday plus UK bank holidays
- Private medical, dental, and vision insurance through AXA Health and BUPA, fully paid for you and your dependents
- 18 weeks paid parental leave (gender-neutral, for both primary and secondary caregivers) plus a ramp-back programme
- Income protection (75% of salary) and death in service cover (4x salary), fully paid
- Pension through Nest with 3% employer contribution
- Gym reimbursement for you and your partner
- Equipment allowance to set up your home office
- AI tooling including Claude Code Enterprise, Microsoft Copilot, and ChatGPT Enterprise licences provided
- Spring Health membership with therapy sessions and mental wellness tools, fully covered
- Company performance-based bonus
- Paid sabbatical of one month at your five-year anniversary
- Biannual hackathons, learning budget, and a team that genuinely invests in your growth
What We Value
- Humility. You know the best ideas win, no matter where they come from. You ask questions before making assumptions and you are as happy being wrong as being right, because either way, the team gets to a better answer.
- Inclusivity. You respect expertise in all its forms and actively seek out perspectives different from your own. You make space for others and assume good intent.
- Excellence. You care about quality in your code, your reviews, and how you communicate. You are not satisfied with 'it works' when it could be better, and you encourage the same standard in those around you.
- Diligence. You take ownership, mind the details, and understand that the software we build is used in moments that genuinely matter. You do not cut corners when people are depending on the outcome.
Location
This role is based at our Central Manchester office and follows a hybrid work model. Applicants must be authorised to work in the UK. We are unable to sponsor or take over sponsorship of an employment visa at this time. This role may require you to complete Non-Police Personnel Vetting (NPPV) security clearance up to level 3.
We feel passionately about equal pay for equal work, and transparency in compensation is one vehicle to achieve that. Total compensation for this role is market competitive, including a target base annual salary range of £90k-125k, plus bonus opportunity, company stock options, and a full benefits package. Please note that the higher end of this range will be reserved for candidates with appropriate experience who reside in high cost of labor markets.
Mark43 is committed to the full inclusion of all qualified individuals. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex disability, age, sexual orientation, gender identity, national origin, veteran status, or genetic information. As part of this commitment, we will ensure that persons with disabilities are provided reasonable accommodations. If reasonable accommodation is needed, please email recruiting@Mark43.com requesting the accommodation.
Senior Full Stack Engineer employer: Mark43
Mark43 is an exceptional employer for Senior Full Stack Engineers, offering a dynamic work environment in Central Manchester that combines the agility of a startup with the backing of a global company. Employees benefit from a comprehensive package including private medical insurance, generous parental leave, and a commitment to professional growth through biannual hackathons and a learning budget. With a strong focus on innovation, particularly in AI-assisted development, Mark43 empowers its team to make a meaningful impact in public safety technology while enjoying a supportive and inclusive culture.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Full Stack Engineer
✨Tip Number 1
Network like a pro! Reach out to folks in your industry, especially those already at Mark43. A friendly chat can open doors and give you insider info about the company culture and what they really value.
✨Tip Number 2
Show off your skills in real-time! Consider doing a coding challenge or contributing to an open-source project that aligns with the tech stack at Mark43. This not only showcases your abilities but also demonstrates your passion for the field.
✨Tip Number 3
Prepare for the interview by diving deep into their tech stack. Brush up on Java, React, and AWS, and think of examples from your past work where you've tackled similar challenges. Being able to speak their language will definitely impress!
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you’re genuinely interested in joining the team at Mark43.
We think you need these skills to ace Senior Full Stack Engineer
Some tips for your application 🫡
Show Your Passion for Impact:When you're writing your application, let us know why you care about building software that makes a difference. We want to see your enthusiasm for creating systems that genuinely matter, especially in the public safety sector.
Highlight Your Full Stack Experience:Make sure to showcase your experience across the full stack. Whether it's React on the frontend or Java on the backend, we want to see how you've owned features end-to-end and tackled complex systems in your previous roles.
Emphasise Collaboration and Mentorship:We value teamwork and mentorship here at StudySmarter. Share examples of how you've supported other engineers or led projects across teams. This will show us that you're not just a great coder, but also a fantastic team player.
Apply Through Our Website:Don't forget to apply 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. We can't wait to hear from you!
How to prepare for a job interview at Mark43
✨Know Your Stack
Make sure you’re well-versed in the technologies mentioned in the job description, like Java, TypeScript, and React. Brush up on your knowledge of AWS and Kubernetes too, as they’re crucial for the role. Being able to discuss your experience with these tools will show that you’re ready to hit the ground running.
✨Showcase Your AI Savvy
Since this role involves working with AI-assisted development tools, be prepared to discuss how you've used similar tools in your past projects. Share specific examples of how these tools improved your workflow or helped solve complex problems. This will demonstrate your alignment with the company's AI-first approach.
✨Demonstrate Ownership and Accountability
The company values a strong sense of ownership, so come prepared with stories that highlight your accountability in previous roles. Discuss projects where you took the lead, made architectural decisions, or mentored junior engineers. This will illustrate your ability to drive results and support team success.
✨Emphasise Collaboration and Communication
Given the collaborative nature of the role, be ready to talk about how you’ve worked with cross-functional teams in the past. Highlight instances where you navigated technical trade-offs or facilitated discussions to reach a consensus. Strong communication skills are key, so make sure to convey your ideas clearly during the interview.
