Senior Software Engineer I - FinCrime - Scam Prevention Team in London
hackajob London About the role
Wise is a global technology company building the best way to move and manage the world’s money. Whether people and businesses are sending money to another country, spending abroad, or making and receiving international payments, Wise is on a mission to make their lives easier and save them money. As part of our team, you will be helping us create an entirely new network for the world's money. For everyone, everywhere.
Join us as a Software Engineer in our critical Scam Prevention team. This is a high-impact engineering role with a strong product focus, dedicated to solving complex, real‑world adversarial problems to directly protect our global customer base.
The Scam Prevention team is on the front lines, dedicated to safeguarding our platform against sophisticated financial crime. We leverage cutting‑edge machine learning, real‑time transaction monitoring, and advanced data analysis to create robust controls and detection capabilities. Our vision is to build a globally scalable fraud prevention engine that protects customer accounts, prevents scams, and consistently surpasses regulatory expectations.
What will you be working on?
- Building and refining critical controls to prevent Wise customers from scams.
- Driving backend and frontend development for our scam prevention and detection systems – 80% of the time on backend and 20% on frontend.
- Delivering a tangible, real‑world impact by securing customers' money, accelerating product growth by raising automation levels, and helping engineer a world‑class money transfer product.
What do you need?
- Engineering expertise: Professional experience with Java or other JVM‑based languages, including the Spring framework. Experience building and designing scalable web applications that handle large amounts of traffic, ideally using React‑based frontend applications and JavaScript/TypeScript.
- System design & operation: Proven experience designing and operating CI/CD pipelines, distributed, and concurrent systems.
- Product ownership: A strong product mindset, accountability, and the ability to drive projects independently while making data‑driven decisions with the customer in mind.
- Data proficiency: Experience with relational and non‑relational databases, including query optimisation and designing resilient schemas.
- Code quality: Exceptional fundamentals, sharp problem‑solving ability, and a commitment to test‑driven development and best coding practices.
- Collaboration: Excellent communication skills to articulate complex technical concepts across teams (Product, Data Science, Investigations).
Nice To Have
- Familiarity with the machine learning lifecycle (data pipelines, feature engineering, and deploying ML systems into production).
What Do We Offer
Starting salary: £87,500 – £111,000
We're people building money without borders — without judgement or prejudice. We believe teams are strongest when they are diverse, equitable and inclusive. We celebrate our differences. Inclusive teams help us live our values and make sure every Wiser feels respected, empowered to contribute towards our mission and able to progress in their careers.
Your tasks
Join the Scam Prevention team to build and refine systems that protect customers from scams.
Your profile
Experience in Java, scalable web applications, and strong problem-solving skills.
What's also included
Competitive salary, inclusive culture, and opportunities for career growth.
Tech stack & ways of working
Senior Software Engineer I - FinCrime - Scam Prevention Team in London employer: hackajob
At hackajob, we pride ourselves on being an exceptional employer that fosters a culture of innovation and inclusivity. Our diverse team thrives in a high-performance environment where your contributions directly impact our multi-asset platform's success. With ample opportunities for professional growth and a commitment to employee development, joining us means being part of a forward-thinking company that values your expertise and ambition.
Your perspectives
Make a real-world impact by safeguarding customers' money with innovative technology.
StudySmarter Expert Advice
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 hackajob 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 hackajob.
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 hackajob.
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 hackajob 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!
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 hackajob.
Craft a killer cover letter
Your cover letter is your chance to stand out—make it personal! Explain why you want to work at hackajob 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 hackajob
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 hackajob 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.
Locations
- London
