Job Description, Responsibilities & Requirements
About the Position
At Ants, we are partnering with a well-funded, early-stage startup in Stockholm to find a Senior Backend Engineer (Payments).
About the Company
We are a well-funded, early-stage technology company on a mission to fundamentally redefine the way the world searches, discovers, and transacts, built on a philosophy that puts the user first at every step.
The user is not simply a means of transaction. They are a valued participant whose data works for them, not against them, enriching their world and their own experience within it, with them retaining full control.
Our mission is underpinned by proprietary, patent-pending technology built on a novel engine and system.
The Problem You Will Be Solving
The internet was built to inform the many, not to serve the individual. Platforms optimize for engagement, extraction, and consumption at global scale. AI has made this model even more efficient, with the user still largely remaining the input, not the full beneficiary.
The problem is not information. The world has never had more. The problem is that people give away a lifetime of data without receiving the personalized experience it should enable.
People should not have to search. They should simply find.
Responsibilities
- Design and build payment orchestration infrastructure with intelligent routing, retry logic, and reconciliation across multiple external and in-house providers
- Build robust transactional architecture that manages complex end-to-end flows from initiation to confirmed state with comprehensive failure handling
- Integrate with third-party commerce and service APIs through clean abstractions that shield the rest of the platform from integration complexity
- Build digital wallet and balance management systems with high standards for accuracy, transaction history, and regulatory auditability
- Design and build enterprise billing and accounting systems that produce correct outputs at scale with strong audit trails for internal and external compliance
- Build foundational data models and event logs that ensure the entire transaction layer is fully replayable, auditable, and recoverable from any failure state
Requirements
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Minimum Qualifications
- Meaningful industry experience inside a payments or fintech company; Klarna, iZettle, Adyen, Trustly, Brite Payments, or an organization of equivalent domain standing
- Complete operational understanding of payment flows; every stage from authorization to reconciliation and the engineering decisions each stage requires
- Working knowledge of PCI DSS applied in practice at the application and infrastructure level
- Idempotency and correctness as default engineering habits applied from the first line of a new system, not added later
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Preferred Qualifications
- MSc in Computer Science or Software Engineering
- Experience with distribution, commerce, and service platform API integrations
- Demonstrated track record of delivering payment infrastructure at a pace and quality that distinguishes you in the domain
- 3–8 years of payments or fintech infrastructure experience
What We Offer
Expect the most talented, rigorous, and driven colleagues you have worked with; people who lift each other up and hold each other to the highest standard. This company is driven by ideas and innovation, regardless of age, position, or background. The best ideas must win and the people behind them recognized and rewarded.
A home for exceptional people and geniuses within their domain; those who have always known what they are capable of and have been waiting for the environment to prove it to the world, whilst first being seen and supported by their coworkers.
Compensation includes an attractive salary and meaningful equity ownership for an early-stage startup.
Equal Opportunity
We are an equal opportunity employer committed to building an inclusive, high-performance culture where everyone can do their best work and reach their full potential. We welcome applicants of all backgrounds and do not discriminate on the basis of race, color, religion, national origin, gender, gender identity or expression, sexual orientation, age, disability, or any other characteristic protected by applicable law.
Application
To apply, send your CV/resume with direct references, GitHub profile, LinkedIn profile, and a brief note on how and why you would like to contribute to our mission to [email protected]. Upon initial acceptance, an in-person interview will follow shortly in Stockholm, Sweden.
Please note that all applications and interviews are conducted in English. Fluency in written and spoken English is a requirement for all roles.
All applications are treated with strict confidentiality.
About Ants
Our mission is to solve the prevailing shortage of IT-competence and thereby, play a central role within the increasing need of recruiting programmers and developers.
In order to do that, our strategy is to specialize in headhunting and roles that are difficult to recruit. This has led us to develop models for how to attract and engage the right candidates. With an agile approach, solid networks and a close cooperation with our customers, we are the market leaders within recruiting tech competence and provides our customers the conditions to continue growing.
Founded in 2008
Co-workers 50+