Über diese Software Engineer (Orchestration) Stelle bei Callsign

Callsign · Vor Ort · Abu Dhabi, Abu Dhabi, United Arab Emirates

Russian hacker, Vladimir Leonidovitch Levin, attempted the biggest bank heist the world had ever seen via dial-up internet in 1994, Zia Hayat, Callsign CEO and founder, was hooked - armchair fraud became a real possibility. From this moment, Zia knew he wanted to play a part in stopping the bad guys and securing the internet for all. Founded In 2012, Callsign's mission has been to make Digital Identity simple and secure for everyone and everything. In that time, we've grown to over 250 employees, opened offices in UK and Abu Dhabi, been recognised as a WEF Global Innovator and our technology is being used by many of the world's leading financial institutions to keep millions of consumers safe.

But we aren't stopping here. The identity revolution has only just begun, and we are looking to hire the brightest and inquisitive minds to help us make every web, mobile and physical Interaction seamless and secure. If this sounds like you, lets chat.

As a Software Engineer at Callsign, you will design, build, and maintain components of our highly transactional Java platform. You’ll work in an Agile, fast‑paced environment, collaborating with cross‑functional teams to deliver secure, scalable, and performant software. You’ll take ownership of features from development through deployment, proactively improving code quality, reliability, and efficiency.

Responsibilities

Design, develop, test and maintain Java‑based services and APIs.
Write clean, testable, and maintainable code following engineering best practices.
Understand requirements before writing code by participating in refinement sessions with peers, QA and Product to deliver high‑quality features.
Participate in code reviews and contribute to continuous improvement.
Perform end-to-end testing of pushed code.
Support production deployments and troubleshoot issues with SRE/App Support.
Identify and address technical debt and performance bottlenecks.

Requirements

3–6 years of commercial experience in Java development.
Strong knowledge of Java (8+/17+), Spring Boot, and RESTful API design.
Experience with relational databases (PostgreSQL/MySQL/Oracle) and SQL.
Familiarity with DynamoDB or other noSQL databases.
Familiarity with Docker, Linux, and CI/CD pipelines.
Understanding of software testing principles (unit, integration, contract and regression).
Understanding of OOP fundamentals and SOLID principles.
Understanding of space and time complexity.
Production experience of Metrics for reliable observability.
Experience with rules engines, expression languages or workflow engines.
Experience with orchestration and workflow patterns such as Saga, Process Manager or state machines.
Exposure to microservices architecture, distributed caching with Redis, and event streaming with Kafka.
Awareness of secure coding practices and application security fundamentals.
Strong communication, analytical thinking, and collaboration skills.

Good to have :

Familiarity with observability tools (Prometheus, Grafana, ELK, OpenTelemetry).
Experience with message queues (Kafka, RabbitMQ).
Basic knowledge of Kubernetes, AWS, or Terraform.
Experience in high‑growth or startup environments.
Exposure to crypto practices and encryption/decryption
Understanding of distributed system patterns such as Circuit Breaker, Idempotency and Outbox
Exposure to reactive programming (Spring WebFlux / Project Reactor) or Java Virtual Threads
Understanding of applied cryptography (encryption, hashing, digital signatures, TLS/mTLS)

Benefits

Private Premium Health Insurance
Visa costs including 1 month paid hotel stay on arrival
Annual Airfare Allowance for the home country
3 months full pay maternity leaves & 2 weeks full pay paternity leaves
25 days of annual leave + Callsign Bank Holiday (not included in holiday allowance)
Competitive Salary
Gratuity as EOSB

Bereit, sich bei Callsign zu bewerben?

Bei Callsign bewerben

Über Callsign

At Callsign we are changing identity. We are an identity fraud, authorization & authentication company, solving the challenges that organizations face in getting their users on to & interacting with their digital platforms.

We use deep learning techniques to combine device, location and behaviour datapoints with dynamic policy management and multi-factor authentication, to verify that the user is who they say they are.

Our aim is to make identification more secure and simple – helping everyone to get on with their digital lives in the most seamless and secure way possible. If you’re interested in working for a company that’s changing the face of digital identity globally, then you’re in the right place. We’re a talented team of research scientists, engineers and developers working with the latest technology to help make the digital world a more secure place.

Our Culture

Callsign is a talented team of people who are passionate about their craft and who care about making the digital world more secure. We work collaboratively, adopting agile principles and methodology to develop a reactive and scalable platform that uses the latest technologies. And with regular boardgames nights, pop-up social activities and company parties, it’s easy to meet new colleagues and feel part of the team.

Alle Jobs bei Callsign ansehen →