Senior Backend Software Engineer | MEP

OpenKrill; United States; Remote; USD 63,000 - 102,000; Full time

Benefits offered by this job

Hybrid/Remote options

Home office reimbursement

Paid time off

Parental leave

Career growth

Job summary

Wellhub is hiring a Senior Backend Software Engineer for the Marketing Engineering & Platform team, remotely in Brazil. You will own SMB acquisition services, build scalable Kotlin/Go backends, and work with Kafka, AWS, and contemporary integrations like Salesforce and Segment.

You’ll collaborate with Product, Marketing, and Sales to shape robust architectures, improve funnel conversion, and drive reliable, observable systems while maintaining a strong focus on wellbeing and team growth.

Qualifications

• Hands-on experience designing, building, and operating distributed systems in production.
• Production experience with Kotlin and Go, or strong Java background with Kotlin/Go focus.
• Event-driven systems and asynchronous processing; Kafka or equivalent.
• Cloud-oriented with containerized microservices on AWS and Kubernetes.
• Data modeling across relational and NoSQL stores (PostgreSQL, Redis, DynamoDB).
• Familiarity with AI-assisted development tools to improve workflows.
• Fluent Portuguese for daily squad interactions and English for cross-team work.

Responsibilities

• Own SMB acquisition funnel services end to end in Kotlin and Go.
• Drive event-driven architecture and asynchronous messaging with Kafka.
• Harden and scale integrations with Salesforce, HubSpot, Segment.
• Establish observability and reliability with Datadog and OpenTelemetry; define SLOs.
• Collaborate with Product, Marketing, and Sales to translate goals into architecture.
• Mentor peers and participate in code reviews across teams.
• Leverage AI-assisted tooling to accelerate delivery and testing.
• Support wellbeing and a healthy work-life balance within the team.

Skills

Kotlin

Go

Java

Kafka

AWS

Kubernetes

PostgreSQL

Redis

DynamoDB

GraphQL

Salesforce

HubSpot

Segment

Datadog

OpenTelemetry

AI-assisted development

Tools

Spring Boot

Kafka

AWS

Kubernetes

PostgreSQL

Job description

Your wellbeing, our mission. Join a company shaping a healthier world.

GET TO KNOW US

At Wellhub we're revolutionizing workplace wellness. Our platform connects employees worldwide to the best partners for fitness, mindfulness, therapy, nutrition, and sleep—all in one simple subscription. Headquartered in NYC with team members in Europe, North America and South America, we’re on a mission to make every company a wellness company.

We believe work should be fulfilling, inspiring, and balanced. Here, you’ll find a team that values wellbeing, collaboration, and different perspectives, where passion and creativity push boundaries to create real impact. Your contributions will help shape a healthier, more balanced world for you and millions of people globally.

Join us in redefining the future of wellbeing!

THE OPPORTUNITY

We are hiring a Senior Backend Software Engineer for our Marketing Engineering & Platform (MEP) team in Brazil - Remote! This is a Remote – Brazil position, meaning you can work from anywhere within the country. Please note that this role is only open to candidates in Brazil.

You will join the B2B Acquisition squad, part of the Marketing Engineering & Platform (MEP) Focus Area inside Wellhub's Product Development organization. We own the entire SMB customer acquisition journey: from the initial lead capture and self-service buy flows, through pricing and dynamic quotation rules, to the final onboarding handover into Wellhub for Companies. Our domain operates on a polyglot, event-driven backend—primarily built with Kotlin/Spring Boot and Go communicating via Kafka, complemented by a GraphQL BFF and direct integrations into enterprise platforms like Salesforce, HubSpot, and Segment. In this role, you will partner daily with Product, Marketing, and Sales to build scalable architecture, optimize conversion funnels, and solve core business challenges with high autonomy.

YOUR IMPACT

• Own critical SMB acquisition funnel services end to end, designing, deploying, and maintaining high-throughput backend applications in Kotlin and Go.
• Drive event-driven architecture and asynchronous messaging patterns using Kafka, ensuring data consistency, idempotency, and resilience across multiple services.
• Harden and scale direct integrations with business-critical platforms, collaborating closely with marketing and sales systems such as Salesforce, HubSpot, and Segment.
• Establish robust observability and reliability practices across all owned services, defining meaningful SLOs and alerts with Datadog and OpenTelemetry to catch issues proactively.
• Partner closely with Product, Marketing, and Sales stakeholders to translate business goals into well-architected technical solutions with transparent trade-offs.
• Collaborate actively across engineering teams to continuously evolve architecture, conduct thorough code reviews, and mentor peers through shared technical ownership.
• Leverage AI-assisted development workflows and engineering productivity tools to accelerate feature delivery, test coverage, and documentation.
• Live the mission: inspire and empower others by genuinely caring for your own wellbeing and your colleagues. Bring wellbeing to the forefront of work, and create a supportive environment where everyone feels comfortable taking care of themselves, taking time off, and finding work-life wellness.

WHO YOU ARE

• A skilled backend engineer with hands-on experience designing, building, and operating distributed systems in production environments.
• A versatile developer with solid production experience in Kotlin and Go, or extensive background in modern Java with strong enthusiasm to work primarily with Kotlin and Go.
• An experienced practitioner in event-driven systems and asynchronous processing, with practical knowledge of Kafka (or equivalent message brokers) and resilient API design.
• A cloud-oriented software engineer with practical experience managing containerized microservices deployed on AWS and Kubernetes.
• A pragmatic developer with solid experience in data modeling and database management across relational (PostgreSQL) and NoSQL (Redis, DynamoDB) datastores.
• An inquisitive technologist who actively leverages AI coding assistants and modern development tools to optimize daily workflows and engineering efficiency.
• An effective team communicator with fluency in Portuguese for daily squad interactions, and comfortable working proficiency in English for cross-team documentation and occasional stakeholder alignment.

We recognize that individuals approach job applications differently. We strongly encourage all aspiring applicants to go for it, even if they don't match the job description 100%. We welcome your application and will be delighted to explore if you could be a great fit for our team. For this specific role, please note that prior experience in backend software engineering with Kotlin, Go, or Java, experience with event-driven architectures (Kafka), and professional working proficiency in English are mandatory requirements

WHAT WE OFFER YOU

With thoughtful benefits, emotional wellbeing resources, and a culture that empowers you to take ownership of your role and your wellbeing, we create an environment where you can thrive in all dimensions of your life.

Our flexible benefits program allows you to customize some of the benefits, according to your needs!

Our benefits include:

WELLHUB: Free Gold+ membership with access to onsite gyms and studios, digital fitness programs, and online wellness resources for meditation, nutrition, mental wellbeing support, and more! Add up to three family members to your plan, ensuring access to wellness for those who matter most to you.

WELLZ: A complete emotional wellbeing program with a unique approach. It offers personalized journeys that combine individual therapy sessions (52 per year) and on-demand content.

HEALTHCARE: Health, dental, and life insurance.

FLEXIBLE WORK: As a Flexible First company, we offer hybrid and remote options to give you the freedom to work in a way that suits you. The model for this specific role can be discussed with your recruiter and hiring manager. When you join, use our home office reimbursement to set up your home office.

FLEXIBLE SCHEDULE: Flexibility for us isn’t just about where we work—it also means being able to shape how and when we get things done. Together with their leaders, employees define schedules that align with their time zones, team needs, and personal routines.

PAID TIME OFF: It’s important to take time away from work to recharge.Employees receive vacations after 6 months and additional 3 days off per year + 1 day off for each year of tenure (up to 5 additional days) + an extra holiday for your birthday!

PAID PARENTAL LEAVE: Welcoming a new child is one of the most special moments in your life. Take the time to be present and enjoy your growing family. We offer 100% paid parental leave to all new parents. Parents giving birth are eligible for an extended leave and a ramp-back period to return part-time while they get settled.

CAREER GROWTH: Access world-class platforms, participate in interactive sessions, build your personalized development roadmap, and explore internal opportunities. We focus on continuous learning and feedback to support your journey toward personal and professional success.

CULTURE: You’ll join a team of passionate people who come together to break boundaries, support each other, and create a meaningful impact in workplace wellness. We win together, building trust through open communication and a culture where every perspective matters. Learn more about our shared culture and values here.

Want to see what it’s really like to work here? Follow us on Instagram @lifeatwellhub and watch our team video on YouTube!

Diversity, Equity, and Belonging at Wellhub

We aim to create a collaborative, supportive, and inclusive space where everyone knows they belong.

Wellhub is committed to cr