Our AI-powered product uses advanced image recognition, facial verification, face recognition, facial anti-spoofing (liveness detection), and behavior analysis to make identity decisions. The next question is whether they can be trusted — and answering it means checking a person's identity data against the authoritative sources that hold the truth. Every country does this differently: a different registry, a different database, a different set of rules about what can be checked and how. To take our platform to the next level, we're looking for a Senior Software Engineer to join the Trust team. This team builds and operates the services that validate a person's identity data against country-specific authoritative sources — government registries, national databases, AML and sanctions screening — and turns that patchwork of very different upstreams into a single, dependable trust signal our customers can act on. YOU'LL HELP US PROTECT HONEST PEOPLE ONLINE BY:
~ Designing, building, and operating Trust's backend services — the integrations with external identity data sources and the validation logic on top of them — with a strong focus on reliability, scalability, and maintainability
~ Expanding our integral coverage: onboarding new countries and data sources quickly, and building the abstractions that make the next integration cheaper than the last one instead of more expensive
~ Modelling messy, inconsistent upstream data into consistent, well-defined verification results — including the matching and validation rules that decide whether the data actually belongs to the person in front of us
~ Making our systems resilient to upstreams we don't control — timeouts, retries and idempotency, backpressure, circuit breaking, graceful degradation, backwards-compatibility testing, SPOF elimination, and end-to-end monitoring of every provider we depend on
~ Handling sensitive personal data responsibly, with regional data residency and compliance requirements designed in from the start




~ Driving engineering quality through code reviews, CI practices, runbook documentation, and mentoring teammates YOU ARE THE RIGHT FUTURE VERIFFIAN FOR THE JOB IF YOU HAVE:
~5+ years of experience building large-scale backend applications with Python, including event-driven and async architectures with message queues (e.g. SQS, RabbitMQ, or similar)
~ Proven ownership of production-critical services — you understand what it means to be on-call and take reliability seriously
~ Strong data modelling instincts — you can turn heterogeneous, inconsistent external data into a clean domain model that holds up as the number of sources grows
~ Proficiency in a range of testing strategies that ensure robust and reliable software, including testing against external dependencies you can't fully control
~ Solid understanding of relational database fundamentals
~ Strong communication skills — you can clearly articulate technical ideas to engineers and non-engineers alike, and work comfortably with Product, Compliance, and external data providers NICE TO HAVE
~ Experience with identity verification, KYC/AML, financial services, or government/registry integrationsExperience working under data privacy and regulatory constraints (GDPR, regional data residency)
~ Event-driven systems, workflow or orchestration engines, or Kubernetes You can get familiar with our tech stack on StackShare . We strive to be the benchmark for trust online, and we take pride in being a positive force. Flexibility to work from home
~ Extra recharge days on top of your annual vacation
~ Extensive medical, dental, and vision insurance to ensure you’re feeling great physically and mentally
~ Learning and Development & Health and Sports budget that you are free to tailor to your own needs
~ Please take the time to read our Recruitment Privacy Notice, which explains how we collect and process your data for recruitment-related activities in accordance with applicable laws. Please be informed that in the final stage of the recruitment process, we may request that you undergo identity verification. Software Engineering

#

📌 Ingeniero/a Senior en desarrollo software (España)
🏢 CrossTalent
📍 España