Source Job

Brazil

  • Contribute to cutting-edge greenfield projects in advertising technology using Ruby/Rails, JavaScript, and Java.
  • Develop scalable back-end and front-end code, experiment with emerging AI technologies, and maintain exceptional code quality.
  • Utilize agile methodologies for multiple weekly releases and participate in enhancing DevOps processes for revenue-critical applications.

Ruby JavaScript Java React Docker

20 jobs similar to Senior Software Engineer (contract)

Jobs ranked by similarity.

Europe

  • Build and own scalable SaaS applications end-to-end — frontend, backend, and data layers.
  • Write production-grade code that is reliable, readable, efficient, and testable.
  • Drive system availability and performance — investigate, analyze, and resolve reliability issues across the stack.

Firstup's mission is to improve the employee experience. They serve 40 of the Fortune 100 companies, reaching and connecting more than 17 million employees daily, with employees who are experts in the employee experience, workforce communications and technology.

Canada

  • Design, improve, and debug complex, scalable distributed systems
  • Find solutions to optimize bottle-necks and general system wide performance
  • Write extensible scalable and test-driven code, and take responsibility and ownership of projects from start to finish

StackAdapt empowers marketers to reach, engage, and convert audiences with precision. They are a leading technology company with an AI-powered platform that connects brand and performance marketing. StackAdapt has a diverse and flexible culture with dedicated career paths.

  • Design and develop scalable, maintainable web applications using .NET and Angular, ensuring modern and reusable front-end and back-end solutions.
  • Build and enhance backend services and integrations leveraging Java (preferred), Node.js, or Python to support enterprise-grade applications.
  • Participate in technical design and architecture discussions, contributing to decisions that shape long-term system scalability and performance.

NBCUniversal is one of the world's leading media and entertainment companies that creates world-class content, which we distribute across our portfolio of film, television, and streaming. We own and operate leading entertainment and news brands including NBC, NBC News, Telemundo and Peacock.

Brazil

  • Assure the quality of the product, promoting the evolution of the team.
  • Acquire and share good practices and technical knowledge.
  • Conduct code investigations, explorations, or experimentations to unlock team's technical obstacles.

CESAR is an innovation and education center that has been training people and driving organizations for 30 years, enhancing their digital strategies. They solve complex and challenging problems in a relaxed, decentralized work environment with benefits for their employees, who act as protagonists.

US North America 4w PTO 16w maternity 4w paternity

  • You will design, build, and iterate on AI-powered product experiences across Fleetio’s Rails and React application.
  • You will partner closely with Product, Design, Data, Customer Success, and other engineers to identify customer problems where AI can meaningfully improve the workflow.
  • You will create high-quality front-end experiences using Fleetio’s current React, TypeScript, Vite, Storybook, Tailwind, and component patterns.

Fleetio is a modern software platform that helps thousands of organizations worldwide manage their fleet operations. They are on an exciting trajectory as a company after raising $450M in their Series D funding round in March of 2025 and are a proud founding member of the Rails Foundation!

Europe

  • Build features, fix bugs, and gradually take on more ownership as you learn the product.
  • You'll work alongside senior engineers who'll help you grow, but we won't spoon-feed you either.
  • You'll use AI tools heavily in our workflow - you'll be expected to leverage them to move fast and learn faster.

Cello provides the Revenue Growth Infrastructure for modern digital businesses. They help teams acquire, retain, and monetize customers at scale by turning word-of-mouth into a systematic, measurable growth channel built for the AI era. They are a small team backed by $10.3M in funding from top-tier investors.

$124,200–$198,700/yr
US

  • Design, build, test, deploy, and maintain scalable, reliable platform services and shared libraries.
  • Contribute to platform and system architecture decisions with a focus on reliability, scalability, and developer experience.
  • Write high-quality, maintainable code and set a strong example of engineering best practices.

Oportun is a mission-driven financial services company that aims to help its members reach their financial goals. They have provided more than $21.3 billion in responsible and affordable credit and saved its members more than $2.5 billion in interest and fees.

US

  • Operate daily with Claude Code using structured, repeatable workflows: plan, decompose, implement, test, ship
  • Serve as a technical resource for AI-augmented workflows across the engineering team, sharing playbooks, patterns, and tooling that help other developers level up
  • Continuously research and evaluate new AI tools, models, and techniques with a framework for deciding what to adopt

Mango Languages is an industry leader in providing engaging language-learning experiences to millions of users around the globe. Their software uses real-world conversations and cultural insights to share world languages with public library patrons, students, corporate employees, government officials, and learners of all ages.

$113,500–$171,000/yr
US

  • Design, develop, test, and deploy high-quality software applications.
  • Implement automated testing to ensure software quality, debug and resolve software issues.
  • Work closely with product managers and other engineers to deliver innovative solutions.

Qualified Digital (QD) is a full-service digital agency focused on imagining, building, measuring, and improving digital experiences across marketing ecosystems. QD is a team of experts who value building connections and aim to advance the healthiest and most connected brands.

South America

  • Design, develop, unit test, and integrate fullstack application components.
  • Build scalable web apps using React on the frontend and Java 21 / Spring Boot on the backend.
  • Implement RESTful APIs, microservices, and integrations with enterprise systems.

CI&T specializes in tech transformation, blending human expertise with AI to create scalable tech solutions. They have over 8,000 employees worldwide and have partnered with more than 1,000 clients over 30 years.

Mexico

  • Drive the design and implementation of new features, break down complex problems into their bare essentials, translate this complexity into elegant design, and create high-quality, maintainable code.
  • Make a meaningful impact on the lives of our community members, create and maintain test automation to enable continuous integration and development velocity.
  • Design and deliver robust microservices integrations via REST/gRPC APIs and via messaging patterns (events/queues), collaborate and mentor other engineers while providing guidance using code, design, and architecture reviews.

EarnIn is a company building products that deliver real-time financial flexibility for those with the unique needs of living paycheck to paycheck. They're growing fast and are excited to continue bringing world-class talent onboard to help shape the next chapter of our growth journey.

$100,000–$140,000/yr

  • Design, develop, and maintain full stack features using Java on the backend and React on the frontend

Oddball strives to bring change and improve daily lives by delivering quality software to the federal space. The team consists of experienced engineering, product, and user experience professionals who enjoy creating scalable solutions and collaborating with clients to solve problems.

Brazil

  • Collaborate with cross-functional teams to develop and maintain web applications using Angular.
  • Engage in AI-DLC methodologies to deliver quality code and meet milestones.
  • Communicate technical ideas effectively with clients and internal teams.

CI&T is a tech transformation specialist, uniting human expertise with AI to create scalable tech solutions. With over 8,000 employees around the world, they have built partnerships with more than 1,000 clients during their 30 years of history. They embrace artificial intelligence.

$140,000–$190,000/yr
Global Unlimited PTO

  • Help take our MCP server from early-stage to production-grade.
  • Contribute to our public APIs with clarity and consistency.
  • Build backends for agentic apps and define new patterns.

Recast is a marketing mix modeling platform. We are a fully remote team with members in 6+ countries, committed to building a diverse team.

LATAM

  • Design and scale backend services using Java and Spring Boot.
  • Develop and maintain multiple distinct frontends (Lobby, IRL, Jobseeker) using React.
  • Triage and troubleshoot production issues dynamically, using data.

Inallmedia.com is a global technology and design firm focused on building impactful digital solutions through remote, distributed teams across LATAM. They partner with international clients across industries, providing long-term technical expertise, product innovation, and team augmentation.

LATAM

  • You'll collaborate with a team of engineers and managers to create applications used by our hotel customers around the world
  • Write clean, self-documenting code that follows best practices and design patterns using agentic development flows
  • Provide creative ideas to improve our product and technology

Canary Technologies is changing the game for hotels with modern software powered by Canary's hospitality-specific AI platform. They are utilized by 20,000+ hoteliers in 100+ countries and is backed by top Silicon Valley investors like Y Combinator, F-Prime, Brighton Park Capital and Insight Partners.

Europe

  • Play a key role in a team focused on building high-value features for a new Affiliate Marketing platform.
  • Support colleagues, influence best practices, and contribute to establishing the team's culture.
  • Write elegant code with a solid undertanding of SOLID principles, constantly refactoring to improve.

Awin is a global affiliate marketing network that connects advertisers with publishers and other partners to drive sales and revenue growth. Established in 2000, Awin boasts a dynamic, social, and inclusive culture, fostering a diverse and transparent network of affiliate partnerships.

US Unlimited PTO

  • Design, code, test, and debug new software applications and enhance existing systems.
  • Collaborate with product managers, designers, and other engineers to define and ship new features.
  • Troubleshoot and resolve software defects and production issues, ensuring high-quality solutions.

Teal Health is dedicated to providing women with the tools, access, and resources needed for informed health decisions, beginning with cervical cancer screenings. The company has created the first FDA-authorized at-home cervical cancer screening, offering a comfortable and convenient alternative to in-office pap smears via its patented Teal Wand collection device and telehealth platform.

South America

  • Maintain and operate Bill Pay backend services to ensure high availability and performance.
  • Diagnose and resolve production incidents autonomously and under pressure.
  • Design and implement automations (scripts, templates, workflows) to eliminate repetitive operational tasks.

Resilient Co connects top tech talent in Latin America with companies in North America. They offer engineering roles in Argentina, Brazil, Colombia, Peru, and Bolivia.

LATAM

  • Analyze, triage, and resolve production issues related to active hiring events.
  • Debug issues across backend, frontend, data, and system integration points.
  • Ensure timely resolution of issues to meet established SLAs.

The job posting mentions Google Chrome, indicating the job is likely at Google. I don't have enough information to provide details about their size, employee count, or culture.