Full Stack Engineer (Java)

SupportFinity™; Austin (TX); Hybrid; USD 130,000 - 170,000; Full time

Benefits offered by this job

401(k) match

Paid time off

Parking in Austin

Growth bonus

Hybrid work policy

Job summary

Sonar is seeking a full‑stack engineer to deliver end-to-end features across backend and frontend, leveraging AI tools to accelerate development while maintaining security and quality. You will work with product, design, and other engineers to shape scalable cloud-native systems that support millions of users.

You will own the lifecycle from design through deployment, with a strong emphasis on testing, observability, and smooth collaboration across squads.

Qualifications

• 5+ years building and operating production cloud web apps.
• Strong backend with Java, Go, or Python.
• Experience designing and consuming HTTP APIs.
• Strong frontend experience with React/JS/TS.
• Familiarity with databases, caching, messaging, REST/JSON, AuthN/Z.
• Experience architecting cloud-native apps.
• Hands-on with automated testing, CI/CD, observability.
• Experience integrating AI-assisted development tools.
• Experience with distributed systems serving millions of users.

Responsibilities

• Design and implement features across the stack: backend services and APIs, frontend components and flows, and the integration between them.
• Collaborate with Product Managers, UX designers, and other engineers to clarify problems, propose solutions, and break the work into incremental, shippable slices.
• Own the delivery lifecycle of your work: automated tests, CI pipelines, deployment, and follow-up on metrics and production behavior.
• Use AI assistants pragmatically to speed up low-level tasks (boilerplate, refactorings, test scaffolding) while keeping full responsibility for architecture and quality.
• Review code and participate in design discussions, providing clear and constructive feedback - including on AI-generated code.
• Improve the systems and pipelines that allow AI-generated code to be safely integrated into production.
• Identify and tackle pragmatic refactoring opportunities and technical debt to improve maintainability, performance, or developer experience.
• Mentor teammates in technical excellence and AI-native workflows.
• Share responsibility for service availability with your team, collaborate with customer facing teams to investigate issues, and participate in on-call rotations.

Skills

Cloud experience

Java

Go

Python

HTTP APIs

React

Databases

Cloud-native

CI/CD

AI tooling

Distributed systems

Tools

React

Java

Go

Python

CI/CD pipelines

Kubernetes

Job description

Who is Sonar?

Sonar helps prevent code quality and code security issues from reaching production, amplifies developers' productivity in concert with AI assistants, and improves the developer experience with streamlined workflows. Sonar analyzes all code, regardless of who writes it — your internal team, genAI, or third parties — resulting in more secure, reliable, and maintainable applications. Rooted in the open source community, Sonar’s solutions support over 30 programming languages, frameworks, and infrastructure technologies. Today, Sonar is used by +7M developers and 400K organizations worldwide, including the DoD, Microsoft, NASA, MasterCard, Siemens, and T‑Mobile.

We believe in developing great products that are supported by great internal teams and a strong culture. We are highly committed to and obsessed with the company, users, each other, and our open source community. We have high standards and hold each other accountable for acting with positivity, dedication, thoughtfulness, empathy, and passion daily.

We are deliberate with our decisions with high clarity of intention. At the same time, we feel extreme urgency and move forward quickly.

And lastly, we are highly effective and operationally efficient. We operate collectively as One Team to accomplish our goals.

At Sonar, CODE is more than just an acronym – it's a mindset that defines daily operations.

Why you should apply

At Sonar, we’re a group of brilliant, motivated, and driven professionals working hard to help supercharge developers to build better, faster. Sonar helps to continuously improve code quality and code security while reducing developer toil. This means that developers can focus on doing more of what they love and less of what they don’t. Our solutions don’t just solve symptoms of problems – we help fix issues at the source – for all code, whether it's developer-written, AI-generated, or from third parties.

We have a dynamic culture with employees worldwide and hub offices in the USA, Switzerland, the UK, Singapore, and Germany. Team members should be able to come to work every day, work on a product they are proud of, love what they do, and feel energized by their peers. With our roots deep in the open source community, we’re all about the mission: supercharge developers to build better, faster.

The impact you will have

As a full stack engineer at Sonar, you will deliver end‑to‑end product features across backend services and web frontends that directly improve key user and business outcomes. You will help evolve your squad’s architecture to ensure it remains reliable, performant, and secure as we scale. You will raise the engineering bar through high standards for code quality, automated testing, and delivery practices. You will operate as an AI‑native engineer who uses AI tools programmatically - accelerating routine tasks while maintaining full ownership of design, correctness, and security.

What you will do daily

• Design and implement features across the stack: backend services and APIs, frontend components and flows, and the integration between them.
• Collaborate with Product Managers, UX designers, and other engineers to clarify problems, propose solutions, and break the work into incremental, shippable slices. As the work is done, you will also help raise awareness of problems across the team.
• Own the delivery lifecycle of your work: automated tests, CI pipelines, deployment, and follow‑up on metrics and production behavior.
• Use AI assistants pragmatically to speed up low‑level tasks (boilerplate, refactorings, test scaffolding) while keeping full responsibility for architecture and quality.
• Review code and participate in design discussions, providing clear and constructive feedback - including on AI‑generated code.
• Improve the systems and pipelines that allow AI-generated code to be safely integrated into production.
• Identify and tackle pragmatic refactoring opportunities and technical debt to improve maintainability, performance, or developer experience.
• Mentor teammates in both technical excellence and effective AI-native workflows.
• Share responsibility for service availability with your team, collaborate with customer facing teams to investigate issues, and participate in on call rotations.

The experience you will need

• 5+ years of experience building and operating web‑based products in production cloud environments.
• Strong backend skills in Java (our core backend language) or an alternative backend focused language, such as Go or Python.
• Experience designing, implementing and consuming HTTP APIs.
• Solid frontend experience with a modern JS/TS stack (e.g., React or similar), including component design, state management, and testing.
• Familiarity with databases and web infrastructure (relational storage, caching, messaging queues, REST/JSON, AuthN/Z).
• Experience architecting cloud-native applications.
• Hands‑on experience with automated testing, CI/CD and observability practices.
• Experience evaluating and integrating AI‑assisted development tools into your workflow while maintaining high quality and security standards.
• Extensive hands‑on experience with experimentation, incorporating customer feedback into the development cycle.
• Practical experience with distributed systems that serve millions of users.

How you work

• Ownership and accountability: You feel responsible for the long‑term health and correctness of what you ship, whether written by you or generated with AI assistance.
• Collaborative by default: You communicate with clarity, seek alignment early, and view candid feedback as a tool for growth.
• AI‑native mindset: You treat AI tools as collaborators—not oracles—validating their output, understanding their limits, and using them to focus on higher‑value design and problem‑solving.
• Pragmatic and incremental: You balance architectural excellence with the need to deliver value quickly and iteratively.

Why you will love it here

• 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.

Benefits of working with Sonar

• Flexible comprehensive employee benefit package that is 90% paid by the company.
• We encourage usage of our robust time‑off allocations.
• We offer an exciting 401(k) plan that has a 4% match, fully vested on day one of participation.
• Generous discretionary Company Growth Bonus, paid annually.
• Fully paid parking in the heart of downtown Austin, Texas.
• 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.

We value diversity, equity, and inclusion

At Sonar, we believe that our diversity is our strength. We are a global company that values and respects different backgrounds, perspectives, and cultures.

We are committed to fostering a diverse and inclusive work environment where everyone feels valued and empowered to contribute their best. We are proud to be an equal opportunity employer and welcome all qualified applicants, regardless of race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.

All offers of employment at Sonar are contingent upon the precise results of a comprehensive background check and reference verification conducted before the start date.

We do not currently support visa candidates in the US.

Applications that are submitted through agencies or third party recruiters will not be considered.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

About the company

Sonar

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