Staff Security Engineer, Trustly
AI Enablement
$225-340k
More information about location
3 days a week in office
Secure online banking payments
Be an early applicant
Secure online banking payments
501-1000 employees
Be an early applicant
$225-340k
More information about location
3 days a week in office
501-1000 employees
Company mission
To make online bank payments convenient for everyone by connecting consumers and merchants through the bank account, the hub of people’s financial life.
Role
Who you are
- 8+ years of security engineering experience, with at least 2-3 years focused on AI/ML security, LLM security, or security for data-intensive systems
- Deep, hands-on understanding of the AI security threat landscape — prompt injection, jailbreaking, data poisoning, model exfiltration, insecure agentic tool use, and MCP-specific attack surfaces
- Strong security engineering fundamentals — experienced in threat modeling, secure design review, penetration testing, and building security monitoring infrastructure
- Familiarity with MCP (Model Context Protocol) architecture, LLM orchestration frameworks, and agentic AI deployment patterns — you can reason about security at the level of individual tool calls and context windows
- Track record of operating at Staff+ IC scope — driving security decisions that span multiple teams, influencing architecture through technical credibility rather than authority
- Excellent communicator — able to explain novel AI security risks clearly to both technical and non-technical audiences, and to earn trust with engineering teams as a partner rather than a gatekeeper
What the job involves
- Trustly's Security & IT team protects the integrity, availability, and confidentiality of our systems and data globally — and is at the forefront of securing Trustly's AI-native transformation
- As Trustly deploys LLMs, agentic systems, and MCP implementations across its engineering and product organization, the Security team plays a critical and novel role: ensuring these AI systems are built, deployed, and governed safely and in line with Trustly's risk posture
- As a Staff AI Enablement Security Engineer, you will be one of two senior security ICs specifically aligned to Trustly's AI transformation — focused on securing Claude, MCP implementations, and the broader agentic AI tooling that Trustly is deploying internally and within its products
- You'll define the security standards and controls for AI systems, work hands-on with the AI Enablement team to assess and mitigate risk, and build the tooling and frameworks that allow Trustly to move fast with AI without compromising security
- Own security assessment and risk management for Trustly's AI and LLM systems — including Claude, MCP server implementations, agentic workflows, and AI-assisted developer tooling
- Define and implement security controls, access governance, and monitoring frameworks for AI systems — covering prompt injection, data leakage, model misuse, and agentic system abuse scenarios
- Partner closely with the AI Enablement team to embed security from the start of AI feature development — conducting threat modeling, reviewing architectures, and advising on safe deployment patterns
- Build and maintain tooling for AI-specific security monitoring — detecting anomalous model behavior, unauthorized data access, and policy violations in real time
- Develop and maintain AI security standards, guidelines, and training resources for engineering teams across Trustly — making it easy for engineers to build with AI safely
- Stay at the leading edge of AI security research — tracking emerging attack vectors, defensive techniques, and regulatory developments relevant to LLM and agentic system security
Application process
- Applications for this role are accepted on an ongoing basis
Our take
Trustly is a fintech platform that makes accepting bank transfers for merchants a simple experience, just like taking card payments. Founded in 2008, the company has grown from just three people to operate offices across Europe and the Americas.
Trustly is a customer of banks, while its customers are merchants who are charged a transaction fee when they receive payments. Thousands of merchants use Trustly, including global players likes Facebook, AT&T, Alibaba, PayPal and TransferWise.
Whilst not a common payment method in certain countries (like the UK), people in many others prefer to pay via bank transfer - so there is a real need for what Trustly is offering. The company has made significant expansion progress, secured some highly advantageous partnerships and acquired SlimPay in 2024 - all suggesting a bright future ahead.
Kirsty
Company Specialist at Welcome to the Jungle
Insights
5% employee growth in 12 months
Company
Funding (2 rounds)
Aug 2023
$53.2m
GROWTH EQUITY VC
Nov 2014
$26.3m
LATE VC
Total funding: $79.5m
Company benefits
- Free breakfast every morning and catered dinner if you need to work late. And happy hour every Friday to celebrate the week
- Each employee gets a generous health allowance, and Trustly Sports Club keeps us active together
- Each month, our teams go on fun outings. Which we’d probably do anyway, even if Trustly didn’t foot the bill!
Company HQ
Vasastan, Stockholm, Stockholm County
Leadership
Carl Wilsson
(Co-Founder & CEO)Obtained a degree in Economics at Stockholm School of Economics before founding Trustly in 2008. Since September 2016, they are the VP of Business Development of Trustly Group AB.
Lukas Gratte
(Co-Founder)Obtained a degree in International Economy at Harvard University, a Master's degree in Engineering physics at KTH Royal Institute of Technology, a second Master's degree in Business Administration and Economics at Stockholm University and co-founded Redbet in 2002.
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