SDK Developer (iOS, Android)

Lisbon, Portugal

Senior (4-6 Years)

Hybrid

English Required Portuguese Required Not Accepting Candidates Living Abroad

Payments and financial technology company operating across Portugal. The team builds and maintains mobile SDKs used by widely adopted payment and banking applications, providing a unified integration layer between mobile apps (iOS, Android and Huawei ecosystem) and backend/core services.

What you will do

Develop and maintain mobile SDKs used by payment and banking applications;
Build and evolve the SDK layer that connects Android, iOS, and Huawei applications with backend and core services;
Integrate C++ components into mobile environments using Kotlin, Swift, Java, and Objective-C;
Investigate technical issues, identify root causes, and implement reliable fixes;
Provide technical support for production solutions and incidents;
Improve the performance, stability, security, and compatibility of the SDKs;
Develop unit tests and follow the defined architecture, security, and code quality standards;
Contribute to Scrum ceremonies, technical planning, and effort estimation.

Location and work model

Hybrid (3 days/week in the office, Lisboa)

Strong professional experience with C++;
Knowledge of mobile development and integration using Kotlin and Swift;
Familiarity with Java and Objective-C;
Solid understanding of Object-Oriented Programming and Design Patterns;
Experience developing or integrating SDKs, libraries, or reusable software components;
Experience integrating applications with REST APIs and backend services;
Knowledge of Git, unit testing, logging, debugging, and troubleshooting;
Strong teamwork, communication, ownership, and problem-solving skills.

Nice to have

Jira
Confluence
Bitbucket
Jenkins
CI/CD
SonarQube

We connect IT professionals with projects that match their skills, professional experience, and goals, then we offer a career progression program, delivered by in-house specialists - our People Experience Partners - to guide them through our journey with us.

What we offer:

A project that matches your skills and ambitions, as well as your preferences for working policies and culture.
A competitive salary with awesome benefits and opportunities to leverage your knowledge and network to earn additional income.
An empowering and respectful work culture enriched with social and learning events.
A People Experience Partner specially assigned to you - your go-to career guide, responsible for supporting your growth, facilitating training, and ensuring your work-life balance at KWAN.

At KWAN, they make sure that I feel comfortable with the client I’m working for and that what I’m doing aligns with my career aspirations.

Luis Caldeira, DevOps @ KWAN

At KWAN, I’m given the space to be myself and do what I love. I have control over the projects I work on, as well as the direction of my career.

Pedro Fonseca, Front End Developer @ KWAN

I see my People Experience Partner as someone who is always available to provide me with motivation and constant feedback, which helps me be sure that I am in the right place.

Josimar dos Reis, Software Developer @ KWAN

I know that I’ve contributed to the growth of a company that truly values a “people first culture”, because my ideas, experiences, and individuality were always appreciated.

João Nascimento, Software Developer (KWAN Alumni)

My two years at KWAN were an incredible experience! From the start, I was welcomed into a warm and collaborative environment where I felt truly supported.

Laís Ortiz, Software Developer @ (KWAN Alumni)

Grab this opportunity, apply now!