Senior Software Engineer

Onfido Unipessoal LDA (PT); City Of London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A leading identity security firm is seeking a Senior Software Engineer to join their Document Verification team. You'll develop innovative digital identity verification solutions, focusing on backend development and AI/ML integration. The ideal candidate has 5+ years of software development experience, strong Python skills, and a background in cloud platforms. This position offers a flexible work environment and opportunities for career growth.

Benefits

Career growth opportunities

Flexible work options

Diversity and inclusion initiatives

Qualifications

• 5+ years of professional software development with backend and ML focus.
• 2+ years in senior engineering roles with demonstrated technical competency.
• Experience designing scalable distributed systems and microservices.

Responsibilities

• Develop and implement backend architectural solutions for document identity verification.
• Build and optimize Python-based AI/ML systems for document processing.
• Mentor junior engineers and lead code reviews.

Skills

Proficiency in Python

Experience with React/TypeScript

Experience with Swift/iOS

Experience with Kotlin/Android

Understanding of AI/ML frameworks

Strong communication skills

Education

Bachelor's degree in Computer Science

Tools

Docker

Kubernetes

AWS

Azure

GCP

Job description

Join us at Entrust

At Entrust, we’re shaping the future of identity centric security solutions. From our comprehensive portfolio of solutions to our flexible, global workplace, we empower careers, foster collaboration, and build solutions that help keep the world moving safely.

Get to Know Us

Headquartered in Minnesota, Entrust is an industry leader in identity‑centric security solutions, serving over 150 countries with cutting‑edge, scalable technologies. But our secret weapon? Our people. It’sthe curiosity, dedication, and innovation that drive our success and help us anticipate the future.

The Role

We are seeking a Senior Software Engineer to join our Document Verification team, where you'll develop cutting‑edge digital identity verification solutions. You'll be at the forefront of document verification technology—from capture and analysis to fraud detection—creating seamless user experiences across Web, iOS, and Android platforms.

This role is perfect for someone who thrives on technical excellence and collaborative problem‑solving. You'll enhance our document verification platform while staying current with the latest advances in AI / ML and secure document processing.

What You’ll Build

You’ll contribute to global document verification technology that spans the entire user journey—from initial document capture through sophisticated fraud detection. You'll have a chance to help shape how Document Verification technology evolves within Entrust and across the Digital Identity industry landscape.

Key Responsibilities

Technical Development

• Develop and implement backend architectural solutions for document identity verification
• Build and optimize Python‑based AI / ML systems for document processing
• Integrate with React web applications, Swift iOS SDKs, and Kotlin Android SDKs

Platform & Strategy

• Contribute to technical strategy and platform development for Document Verification
• Ensure adherence to emerging industry standards and compliance requirements (NiST, ETSI, ISO, GDPR)
• Apply software security best practices including secure SDLC and cryptographic implementation
• Evaluate and implement emerging technologies for image quality assessment

Leadership & Collaboration

• Mentor junior engineers and lead code reviews and technical design discussions
• Work closely with product management and engineering leadership
• Drive continuous improvement of development processes and system reliability

What You Bring

Required Qualifications

• Education : Bachelor's degree in Computer Science, Software Engineering, or related technical field
• Experience : 5+ years of professional software development with backend and ML focus
• Leadership : 2+ years in senior engineering roles with demonstrated technical competency
• Technical Skills : Strong proficiency in Python. Experience with at least one of : React / TypeScript, Swift / iOS, Kotlin / Android, Ruby. Cloud platforms experience (AWS, Azure, GCP). Containerized deployment using Docker and Kubernetes
• Architecture : Experience designing scalable distributed systems and microservices
• AI / ML : Understanding of modern frameworks (TensorFlow, PyTorch) and production model deployment
• Process : Agile development methodologies and modern DevOps practices
• Communication : Strong skills with ability to explain technical concepts to diverse audiences

Preferred Qualifications

Advanced Technical Skills

• Multi‑threaded applications and high‑performance computing
• Software security (secure SDLC, cryptography, obfuscation, code signing)
• SaaS development and deployment at scale
• Infrastructure tools : Docker, Kubernetes, Terraform
• Monitoring : Sentry, NewRelic, Datadog, Splunk

Identity & Security Expertise

• Document verification, computer vision, or identity verification domains
• Mobile app security (certificate pinning, RASP, anti‑tampering)
• NFC technologies and mobile integration patterns

Specialised Knowledge

• Ruby on Rails or other backend frameworks beyond Python
• Image quality assessment and document image processing
• Document security standards and anti‑fraud techniques
• Advanced degree in Computer Science, ML, Computer Vision, or related field

Career Growth : Whether you’re a budding developer or a seasoned expert, we’re invested in your professional journey. With learning‑forward initiatives and exciting challenges, your growth is our priority.

Flexibility : Life is all about balance. Whether you’re remote, hybrid, or on‑site, we offer flexible options that fit your lifestyle.

Collaboration : Here, your voice matters. Our teams thrive on sharing ideas, brainstorming solutions, and working together to build a better tomorrow.

We believe in securing identities—but it doesn’t stop there. At Entrust, we’re passionate about valuing all identities. Our culture is built on diversity, inclusion, and respect. From unconscious bias training for our leaders to global affinity groups that connect colleagues across the globe, we’re creating a community where everyone is encouraged to be themselves.

Ready to Make an Impact?

If you’re excited by the prospect of innovating, growing your career, and collaborating in a dynamic environment, Entrust is the place for you. Join us in making a difference. Let’s build a more secure world—together.

Apply today!

Visit our careers page for more information.

Entrust is an EEO / AA / Disabled / Veterans Employer

Entrust values diversity and inclusion and we are committed to building a diverse workforce with wide perspectives and innovative ideas. We welcome applications from qualified individuals of all backgrounds, and we strive to provide an accessible experience for candidates of all abilities.

Recruiter : Jack Steib