Software Engineer - Front

sunday; Atlanta (GA); Hybrid; USD 120,000 - 190,000; Full time

Benefits offered by this job

Stock options

Unlimited PTO

Significant ownership opportunities

Employer-paid health insurance for you

Employer-paid health insurance for you

50% transportation reimbursements

Paris office in Sentier district

Hybrid work model

Remote-work stipend of 50

Job summary

sunday is seeking a Senior Software Engineer to design and deliver high-impact full-stack features, from Kotlin backend services to React frontend experiences, while accelerating development with AI agents. You will own complex tech challenges, balancing speed, simplicity, and robustness, and contribute to scalable services.

Report to Nicolas and join the Tech team in a hybrid role. You will influence architecture, reliability, and trade-offs, with a strong business sense and fluency in French

Qualifications

• Several years of full-stack experience with Kotlin backend and React frontend.
• Experience deploying high-load services in production.
• Hands-on experience with AI-assisted development tools.
• Ability to reason about architecture, reliability, and trade-offs.
• Strong business acumen and prioritization of impactful work.
• Fluency in both French and English (spoken and written).

Responsibilities

• Design and deliver high-quality full-stack features, from Kotlin backend services to React.js frontend applications.
• Write code using AI agents and help build a true agentic software factory.
• Take ownership of complex topics related to software design, architecture, and service reliability.
• Design solutions capable of running in production at scale.
• Continuously improve development practices and team efficiency through agentic AI.
• Make pragmatic technical decisions considering business impact, simplicity, and speed.
• Share standards, learnings and convictions to help the team grow.

Skills

Kotlin backend

React frontend

AI agents development

High-load services

System architecture

Business acumen

French & English

Job description

About Us

sunday is building the fastest, simplest way to pay in restaurants. With a quick scan of a QR code, diners can pay, tip, and leave in about 10 seconds. We believe great products should feel obvious, not complicated, and we focus relentlessly on keeping things simple while earning trust from restaurants and guests at every interaction. Today, sunday powers payments in thousands of restaurants across the US, UK, and France, helping operators turn tables faster, increase tips, and unlock valuable insights. We push ourselves to go beyond what’s expected, building with ownership, moving fast, and scaling with ambition as we tackle our biggest growth opportunity in the US.

About the Role

As a Senior Software Engineer, your goal will be to design and deliver high-impact full-stack features, from Kotlin backend development to React frontend experiences, while accelerating the way we build software through AI agents.

You will report to Nicolas and join the Tech team. You will take ownership of complex technical challenges, make the right trade-offs between speed, simplicity, and robustness, and directly contribute to building services capable of handling high loads.

Key Responsibilities

• Design and deliver high-quality full-stack features, from Kotlin backend services to React.js frontend applications.

• Write code using AI agents and help build a true agentic software factory.

• Take ownership of complex topics related to software design, architecture, and service reliability.

• Design solutions capable of running in production at scale.

• Continuously improve development practices and Engineering team efficiency through agentic AI.

• Make pragmatic technical decisions, taking business impact, simplicity, and execution speed into account.

• Share your standards, learnings, and technical convictions to help the team grow.

About You

What we’re looking for:

• Several years of full-stack development experience, with strong hands‑on expertise in Kotlin on the backend and React.js on the frontend.

• Proven experience deploying and operating high-load services in production.

• Hands‑on experience writing code with AI agents or AI‑assisted development tools.

• The ability to reason about architecture, reliability, and technical trade‑offs.

• Strong business acumen: you understand the impact of your decisions and know how to prioritize what truly matters.

• Fluency in both French and English, spoken and written.

What will set you apart:

• Strong ownership: you tackle problems head‑on rather than waiting for permission.

• An entrepreneurial mindset, strong adaptability, and a willingness to thrive in ambiguous environments.

• Independent thinking: you know how to reframe problems and find simple, original, evidence‑based solutions.

• A strong focus on impact, with the ability to make clear trade‑offs and apply the 80/20 principle.

• Positive energy, a collaborative mindset, and a desire to help the entire team succeed beyond your own scope.

• Intellectual curiosity, the ability to learn quickly, and a genuine desire to keep improving.

Compensation, Perks & Benefits

• A competitive package, depending on experience, plus stock options.

• Unlimited paid time off.

• Significant ownership and numerous opportunities for career growth.

• 100% employer‑paid health insurance coverage for you and your children.

• 50% reimbursement of your public transportation pass.

• Beautiful offices in the heart of Paris, in the Sentier district.

• A hybrid working model combining office presence and remote work.

• €50 per month towards remote‑working expenses.

• A 39-hour working week under an executive employee status (statut cadre).

Interview Process

• Step 1 - HR Screen (30 mn)

• Step 2 - Hiring manager interview (30 mn)

• Step 3 - Technical interview

• Step 4 - Culture fit interview: (30mn)

• Step 5 — Reference checks

Thank you for taking the time to apply, and looking forward to getting to know you!

sunday is an equal opportunity employer and does not discriminate and all qualified applicants will receive consideration for employment without regard to race, creed, color, sex, affectional or sexual orientation, gender identity or expression, gender, ethnicity, religion, national origin, ancestry, nationality, age, disability, marital status, veteran status, genetic information, or on any other basis prohibited by law (except where an attribute is a bona fide occupational qualification).