Senior Software Developer

<p dir="ltr">Join our talented and passionate team in designing and automating personalised customer experiences at scale. At Kaisa, we understand that our greatest asset is our talented and diverse team. We believe in creating an environment that fosters personal growth, professional development, and overall well-being. Regardless of where you are in the world, our commitment to your success and happiness remains unwavering. </p><p dir="ltr"><strong></strong></p><h2 dir="ltr"><strong><strong>About the role</strong></strong></h2><p></p><p>We are looking for an experienced Software Engineer with deep expertise in building scalable backend systems, distributed microservices, and modern cloud-based infrastructure. This role is ideal for someone who thrives on solving complex architectural challenges and has a strong track record of building and deploying reliable, high-performance software systems at scale.</p><p>You will be instrumental in designing core systems, APIs, and data pipelines, while contributing to the evolution of our infrastructure. You’ll collaborate across cross-functional teams to deliver robust solutions, audiovisual data processing, and modern ML pipelines.</p><p></p><h3><strong>Key Responsibilities and Qualifications</strong></h3><p></p><p>Design, develop, and maintain scalable backend services using <strong>TypeScript</strong>, <strong>Node.js</strong>, <strong>Angular</strong>, <strong>PHP</strong>, and <strong>Python</strong></p><p></p><p></p><p>Architect and build APIs using <strong>REST</strong>, <strong>GraphQL</strong>, and <strong>SOAP</strong></p><p></p><p></p><p>Design and manage distributed <strong>microservices</strong> architectures</p><p></p><p></p><p>Implement <strong>event-driven architectures</strong> using <strong>Kafka</strong>, <strong>SNS</strong>, or <strong>SQS</strong></p><p></p><p></p><p>Integrate and scale <strong>telephony stacks</strong> including <strong>Asterisk</strong> and <strong>Kamailio</strong></p><p></p><p></p><p>Design, optimize, and manage relational and NoSQL databases including <strong>MySQL</strong>, <strong>DynamoDB</strong>, <strong>Redis</strong>, and <strong>Druid</strong></p><p></p><p></p><p>Develop <strong>ETL pipelines</strong> and process <strong>audio-visual data</strong> for downstream consumption</p><p></p><p></p><p>Define and implement <strong>infrastructure as code</strong> using <strong>Terraform</strong></p><p></p><p></p><p>Build and maintain robust <strong>CI/CD pipelines</strong> with <strong>Jenkins</strong> or similar tools</p><p></p><p></p><p>Work in a cloud-native environment and provide leadership in <strong>AWS</strong> architecture (AWS Solutions Architect certification required)</p><p></p><p></p><p>10+ years of professional software development experience</p><p></p><p></p><p>Master’s degree in <strong>Computer Science</strong>, <strong>Artificial Intelligence</strong>, or <strong>Machine Learning</strong></p><p></p><p></p><p>Deep experience with backend systems and infrastructure engineering</p><p></p><p></p><p>Strong experience with AWS and cloud-native service design</p><p></p><p></p><p>Proven ability to work in fast-paced, cross-functional environments</p><p></p><ul> </ul><h3><strong>Nice to have</strong></h3><p></p><p>Solid foundation in <strong>machine learning</strong>, <strong>AI</strong>, and <strong>statistical</strong> methods</p><p></p><p></p><p>Familiarity with <strong>Generative AI</strong> technologies and <strong>Large Language Models</strong></p><p></p><p></p><p>Experience with <strong>CUDA</strong>, <strong>C++</strong>, or <strong>Rust</strong></p><p></p><p></p><p>Hands-on experience deploying and managing <strong>cloud-native</strong> and <strong>self-hosted</strong> services</p><p></p><ul> </ul><p dir="ltr"><br/></p><h2 dir="ltr"><strong>Our ways of working</strong></h2><p dir="ltr">Each team has clear responsibilities and goals and the freedom to collaborate on the optimal design for the products and solutions we build. We want to hear your opinion!</p><p dir="ltr">We have an agile approach to processes and teamwork and we constantly evaluate and adapt. Our Product and UX teams are closely integrated with development. We use modern frameworks and the best tools available.</p><p dir="ltr">We work flexibly and have fun at work. Delivering customer value is as important as the wellbeing of our friends and colleagues. We value personal growth and encourage learning, and embrace every opportunity to share knowledge in the team.<br/><br/></p> <p dir="ltr"><strong>Where you will be and how you will work </strong></p><p dir="ltr">We have three offices: London, Uppsala and Paris. This role is based in the<strong> Uppsala </strong>office.</p> <p dir="ltr">We work business hours, but we understand that life sometimes gets in the way.</p> <p dir="ltr"><strong><strong><br/></strong>Kaisa</strong> <strong>Culture</strong></p> <p dir="ltr"><strong></strong><br/>What makes Kaisa stand out? Our values, guiding us every