Design, Build & Maintain Integrated Internal Applications

Own the end-to-end lifecycle of internal software applications and integrations: architecture, coding, testing, deployment, and maintenance.

Translate business requirements into robust, scalable technical designs, including data models, APIs, system architecture, and UI flows where relevant.

Implement full-stack features: write clean, efficient, and maintainable code for both back-end and front-end components; design and manage persistence layers; integrate with third‑party APIs (e.g., Salesforce, Stripe) and internal services.

Build security & compliance into the design, incorporating data protection and regulatory requirements (e.g., GDPR) from the start, and collaborating with IST, ITOps, and Legal to ensure adherence to standards.

Act as a Technical Partner to Business Stakeholders

Collaborate with business stakeholders (e.g., Finance, Sales, HR, Business Technology colleagues) to clarify requirements, challenge assumptions, and co‑design pragmatic, value‑driven solutions.

Support and guide User Acceptance Testing (UAT): provide technical support during UAT, address defects quickly, and ensure the delivered solution truly solves the underlying business problem.

Communicate clearly on feasibility, trade‑offs, and timelines, serving as the technical point of contact and managing scope to protect solution integrity and production stability.

Own the Full Development & Operational Lifecycle

Implement and operate CI/CD pipelines to achieve reliable, frequent releases with a low change‑failure rate.

Write and maintain unit, integration, and end‑to‑end tests to ensure high software quality and reduce regressions.

Provide ongoing production support for the applications you own, including bug fixes, performance tuning, refactoring to address technical debt, and planned feature evolution based on user feedback and strategy.

Document architecture and decisions clearly (e.g., in Confluence/Xtranet and Atlas), so the broader team can understand, operate, and extend your work.

Ensure System Health, Monitoring & Incident Response

Implement comprehensive monitoring and alerting for all owned applications, with meaningful KPIs and dashboards that surface issues before they become incidents.

Serve as the primary on‑call engineer (as part of a rotation) for your applications, leading incident investigation and coordinating with other teams when issues occur.

Run blameless post‑mortems after critical incidents, identify root causes, and define action items that meaningfully reduce recurrence.

5+ years (tbc) as a Full-Stack Engineer building business‑critical applications and integrations.

Strong proficiency in at least one modern back‑end language (e.g. TypeScript, Java), in AWS environments.

Proven experience designing and implementing integrations between SaaS systems (e.g., CRM, billing, payments, licensing, ERP) with robust error handling and observability.

Solid understanding of software architecture and design principles, including how to design for scalability, maintainability, and operational robustness over time.

Demonstrated ability to build secure and compliant solutions, with an understanding of data protection concepts (e.g., GDPR) and secure coding practices.

Hands‑on experience with CI/CD, automated testing, and modern SDLC practices (e.g., Git-based workflows, code reviews, trunk‑based or similar).

Familiarity with monitoring, logging, and incident management for production services.

Our culture and mission set us apart. We have a dynamic work culture that values respect and kindness and embraces the right to fail (and get right back up again!).

Great people make a great company. We value people skills as much as technical skills and strive to keep things friendly while still being passionate leaders in our domains.

We have a flexible work policy that includes 3 days in-office and 2 days work-from-home each week for those located near our office locations; some locations such as Dubai, India, Japan and Australia operate fully remotely.

We have a growth mindset. We love learning and believe continuous education is critical to our success. In an ever-changing industry, new skills are necessary, and we're happy to help our team acquire them.

As the leader in our field, our products and services are as strong as our internal team members.

We embrace transparency with regular meetings, cascading messages and updates on the growth and success of our organization.

Pension Scheme: 1st Pillar (Unterstützungskasse): Automatic, financed by Sonar, 3% of gross salary, an additional benefit in addition to your salary.

Pension Scheme:2nd Pillar (bAV): Voluntary, 15% contribution by Sonar from social security savings.

We encourage usage of our robust time-off allocations with 28 PTO days for our employees based out of the Geneva region, plus additional days based on seniority and circumstances.

Sonar recognizes holidays on working calendar days. If the holiday date occurs on a Saturday, we will recognize the day on the preceding Friday. If the holiday date occurs on a Sunday, we will recognize the day on the following Monday.

Public transport reimbursement of 60% for annual subscription.

Global workforce with employees in 20+ countries representing 35+ unique nationalities.

We have an annual kick-off somewhere in the world where we meet to build relationships and goals for the company.