Source Job

Brazil

  • Senior backend engineering role in a fast-paced digital banking environment, focusing on Kotlin and Spring.
  • Own backend services end-to-end, from feature conception to production support, ensuring reliability and performance at scale.
  • Collaborate within agile, multidisciplinary teams to solve complex technical challenges and improve development practices.

Kotlin Spring Framework TDD AWS Event-driven Architecture

20 jobs similar to Senior Backend Kotlin Developer

Jobs ranked by similarity.

Global

  • Build and scale the backend systems behind salary advance, FGTS, and consignado lending — with a clear eye on reliability and correctness
  • Develop and refine the APIs that power an instant in-app experience, with the precision those transactions demand
  • Collaborate directly with product, credit, compliance, and analytics — your technical perspective shapes the work

Tilt is a financial technology company that uses mobile-first products and machine learning to provide credit based on real-time financial signals, looking beyond traditional credit scores. With millions of customers worldwide, Tilt fosters a culture of ownership, collaboration, and impact, where good ideas travel fast and growth follows contribution.

Brazil

  • Act as the technical leadership pillar, mentoring developers and ensuring technical excellence throughout the product lifecycle.
  • Lead solution design and architecture using microservices, DDD, hexagonal architecture, and clean code, while writing high-quality Kotlin and Java code.
  • Drive a quality culture with TDD, code reviews, and performance optimization, handling critical incident resolution.

CI&T helps large companies transform AI potential into real business impact through AI deployment, AI-native execution, and tech-integrated business solutions. With 30 years of experience and 8,000 employees across 25 countries, they foster a collaborative culture focused on innovation and continuous learning.

Brazil

  • Act as a protagonist of digital transformation in the largest bank in Brazil, focusing on technical excellence.
  • Collaborate with multidisciplinary teams to design, develop, and implement efficient solutions.
  • Maintain and continuously improve existing systems, integrating with AWS cloud services.

CI&T helps large companies transform AI potential into real business impact with AI Deployment, AI-native execution and tech-integrated business solutions. With 30 years of experience and 8,000 employees across over 25 countries, we collaborate to build solutions with real impact.

Brazil

  • Design, build, and maintain robust, secure backend services addressing customer needs.
  • Partner with Product Managers during problem discovery and technical decision-making.
  • Contribute to system architecture and proactively reduce technical debt.

They build the technology infrastructure behind the next generation of private markets. The team consists of 130+ professionals across 40+ countries and fosters a collaborative, product-focused culture.

LATAM

  • Design and implement backend microservices following clean architecture.
  • Build and maintain REST/GraphQL APIs and event-driven integrations.
  • Write automated tests and maintain CI/CD pipelines for cloud deployment.

Software Mind is a team of engineers that ramps up top-notch companies' projects. It is a multicultural, growing company certified as a Great Place To Work.

  • Build and maintain reliable, scalable backend services using Kotlin or Java and modern web frameworks.
  • Take ownership of features from user problem discovery through development, rollout, and evaluation of impact.
  • Work closely with product managers, designers, and engineers to translate ideas into high-quality shipped experiences.

The company builds reliable, scalable SaaS products that improve the way frontline employees work. It is a young technology organization with a collaborative, remote-first culture and highly motivated colleagues.

US

  • Design, develop, and launch backend systems at scale using Python or Kotlin.
  • Collaborate with team and stakeholders to balance speed and quality while protecting system reliability.
  • Contribute to community through growth and development activities and navigate large codebases.

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without hidden fees. They are a remote-first company that values transparency and employee well-being, offering competitive benefits and a collaborative culture.

Spain

  • Take end-to-end ownership of backend features from refining requirements to delivering robust production-ready solutions.
  • Evolve the system core, APIs, and data layer to optimize performance, scalability, and reliability under demanding workloads.
  • Balance fast product increments with sustainable technical architecture.

Genestack is tackling the underlying computational and scientific challenges of bioinformatics to provide researchers with software tools that streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Their platform is deployed at leading pharmaceutical, agricultural, and consumer goods companies, as well as leading academic institutions, and they are continuing to grow.

Global Unlimited PTO

  • Design and develop scalable, high-performance backend services using Java and AWS technologies.
  • Collaborate with cross-functional teams to define technical requirements and ensure smooth integration across the platform.
  • Optimize existing services for performance, reliability, and maintainability while mentoring junior team members.

Oscilar builds the most advanced AI Risk Decisioning Platform for banks, fintechs, and digital native organizations to manage fraud, credit, and compliance risk. The team includes industry veterans from Meta, Uber, Citi, and Confluent, with over 50% of the company in Engineering and Product, fostering a mission-driven culture.

Spain

  • Design, develop, and launch scalable backend systems to support Affirm's international expansion.
  • Collaborate with product, design, and analytics to define technical plans and deliver high-quality features.
  • Foster a culture of quality through code reviews, mentoring, and proactive problem-solving.

Affirm is reinventing credit to make it more honest and friendly, offering buy now pay later without hidden fees. The company is a global leader in fintch, fostering a culture of innovation, collaboration, and people-first values.

Brazil

  • Design and implement large-scale distributed systems for a high-traffic pet products marketplace.
  • Build scalable, fault-tolerant backend services using Java, Spring Boot, and event-driven architecture.
  • Collaborate with cross-functional teams to ensure system reliability and optimize performance.

Sigma Software creates innovative software solutions for global businesses. They support engineers in solving complex technical challenges within collaborative international teams, fostering professional growth.

$3,585–$3,585/mo
Europe LATAM

  • Develop clean, maintainable, and testable backend services using Java and Spring Boot.
  • Design and maintain PostgreSQL schemas, APIs, and microservices in a distributed environment.
  • Collaborate with cross-functional teams, write automated tests, and own features from implementation to release.

Jobgether is an AI-powered job matching platform that connects candidates with hiring companies. The company fosters a collaborative, remote-first culture focused on clarity, growth, and open communication.

Poland

  • Own and deliver quarterly goals for your team, guiding engineers through ambiguity to solve open-ended problems.
  • Collaborate with product management, design, and analytics to articulate technical constraints and make risk-aware decisions.
  • Foster a culture of quality and ownership by setting code review and design standards, and developing talent through feedback and guidance.

Affirm is a financial technology company that provides buy now, pay later solutions, aiming to make credit more honest and friendly. It is a publicly traded company with a remote-first culture and a global team, emphasizing employee well-being and growth.

US

  • Own and deliver quarterly goals for your team, leading engineers through ambiguity to solve open-ended problems.
  • Support peers and stakeholders in the product development lifecycle by collaborating with product management, design, and analytics.
  • Foster a culture of quality and ownership by setting code review and design standards, and developing talent on your team.

Affirm is a financial services company that provides buy now, pay later financing without hidden fees or compounding interest. They have millions of customers and thousands of merchant partners, and foster a culture of honesty, trust, and innovation.

LatAm

  • Write production-quality backend code in Kotlin or Python for the Affirm Card product.
  • Design systems and contribute to implementation, building APIs and data models for service-oriented architectures.
  • Collaborate cross-functionally with Product, Analytics, and engineering teams to execute strategy, and participate in on-call processes.

BlueCloud is a Snowflake Elite Partner helping enterprises move to unified, AI-ready data platforms. With 450+ consultants and 200+ transformations, they deliver data solutions 40-50% faster, serving clients across finance, healthcare, and more.

Portugal

  • Developing high quality, testable software with unit and integration testing.
  • Writing end-to-end solutions for web-based applications and robust production applications.
  • Releasing software with DevOps culture using CI/CD and collaborating in an Agile environment.

Ryanair Labs is the technology brand of Ryanair, creating Europe's Leading Travel Experience. It is a digital and IT innovation hub with a collaborative, fast-paced culture, part of Europe's largest airline group planning to expand to 800 aircraft and 300 million guests.

India

  • Design, implement, test, and deliver backend features with minimal guidance using Ruby/Rails, Go, or other modern technologies.
  • Take ownership of features from requirement clarification to deployment and production follow-up.
  • Collaborate with product, frontend, infrastructure, and security teams to build secure, maintainable systems.

The company operates a large-scale technology platform used by millions of users. The team is remote and asynchronous, prioritizing collaboration and autonomy.

$96,000–$141,000/yr
Canada

  • Build and operate backend systems that support accurate customer outcomes after financial transactions.
  • Collaborate with cross-functional teams including product, design, analytics, and compliance.
  • Contribute to system reliability, monitoring, and on-call responsibilities.

The company builds high-scale backend systems for accurate financial transaction processing. They have a remote-first, collaborative engineering culture with a focus on reliability and operational excellence.

UK

  • Lead the design and development of shared backend services and platform capabilities, driving architectural decisions across multiple teams.
  • Build scalable, highly available cloud-native solutions using Java and AWS technologies, and mentor engineers to promote engineering excellence.
  • Collaborate with product, architecture, and engineering teams to solve complex technical challenges, championing best practices in quality, performance, and security.

Turnitin is a recognized innovator in the global education space, partnering with institutions to promote honesty and fairness in assessments for over 25 years. With a remote-first culture and team members in over 35 countries, we empower you to work with purpose and accountability in a diverse, collaborative community.

$79,781–$116,347/yr
Global Unlimited PTO

  • Design, develop, and maintain scalable, high-performance, low-latency backend services using Java and AWS in a distributed environment.
  • Collaborate with product, frontend, and QA teams while optimizing services for performance, reliability, and scalability.
  • Drive engineering best practices, CI/CD, observability, and technical mentorship across the team.

A global AI-powered SaaS platform improving the safety of online transactions through distributed systems and real-time data. Remote-first, engineering-led, and AI-first culture with emphasis on learning and collaboration.