Source Job

• Participate in the development and maintenance of high-performance backend services and applications using Golang.
• Architect, implement, and optimize microservices-based applications, ensuring scalability, reliability, and maintainability.
• Collaborate with the DevOps team to deploy and manage Golang applications in Kubernetes clusters using Helm.

Ruby Labs creates and operates innovative consumer products across health, education, and entertainment. They foster innovation and look for passionate individuals to join their fast-growing teams.

• Design, build and ship well-tested features across our platform.
• Collaborate closely with Product and Design to understand problems and requirements.
• Incorporate AI tools and workflows into your day-to-day development practice.

Thirdfort is on a mission to protect society from fraud and money laundering, having already protected over 3 million people. They are FCA regulated and have raised over $33m in capital from leading Fintech investors.

• Build scalable backend services and APIs that power our digital merchandising platform.
• Work with other senior engineers to contribute to high level decisions about the architecture and design.
• Work with Product Managers to make Jane’s advertising product offerings sound, robust and easy to use.

Jane Technologies is an MIT-founded eCommerce company in the cannabis industry experiencing rapid growth. Their mission is to bring confidence to the online cannabis shopping experience by connecting consumers with local dispensaries and brands. They are a small close-knit team of highly technical engineers with diverse backgrounds and a strong engineering culture.

• Design, build, and maintain scalable backend services and APIs that power Chattermill’s core analytics platform.
• Architect reliable, maintainable distributed systems and contribute to the evolution of backend service design and infrastructure.
• Own end-to-end delivery of backend engineering workstreams, from technical scoping and architecture through to implementation, testing, observability, and production support.

Chattermill helps large successful brands like Uber, Amazon, and Wise put their customers at the centre of everything they do. Using best-in-class tech in a fast-evolving AI space, their Customer Experience Intelligence platform continuously analyses feedback to help clients identify what to do next.

• Design and build backend systems, APIs, infrastructure, and platform capabilities that improve developer workflows across Reddit.
• Build scalable and reliable systems across both AI-powered developer workflows and the core non-AI systems engineers rely on every day.
• Lead high-impact projects across Reddit’s developer tooling ecosystem by writing and reviewing code and design docs, aligning stakeholders, and making pragmatic technical tradeoffs.

Reddit is a community-based platform built on shared interests, passion, and trust, facilitating open and authentic conversations. With over 100,000 active communities and approximately 126 million daily active unique visitors, it serves as one of the internet’s largest sources of information.

• Design, develop, deploy and maintain new and existing applications.
• Co-own our services architecture, resilience, scalability and robustness.
• Grow on technical leadership & mentorship of other engineers.

Qonto provides a finance workspace with banking at its core, augmented by financial tools, creating freedom for SMEs to succeed. Founded in 2017, Qonto has over 1,600 employees and serves over 600,000 customers across 8 European countries with a customer satisfaction-focused culture.

• Design, code, test, and debug scalable software applications and APIs following best practices.
• Collaborate with cross-functional teams to translate business requirements into technical solutions.
• Participate in code reviews, guide AI tooling practices, and maintain technical documentation.

EasyPost provides a developer-friendly REST API for shipping, making shipping simple for businesses from startups to Fortune 500. Founded in 2012 as a YC unicorn, EasyPost is a hyper-growth company with a scrappy, fast-moving culture where builders and problem-solvers thrive.

• Design and maintain high-performance backend services in Golang on GCP and AWS for fraud detection and compliance products.
• Build APIs for banking/payment systems and collaborate with cross-functional teams on product development.
• Own the full product lifecycle including testing with Cypress, Junit, or Mockito and maintain user-facing documentation.

Sardine provides fraud prevention and AML compliance solutions using device intelligence, behavior biometrics, machine learning, and AI. The company has raised $145M from top investors and serves over 300 banks, retailers, and fintechs globally, maintaining a remote-first culture with hubs in North America and Brazil.

• Design, develop, and scale backend services using TypeScript and Node.js within a microservices architecture.

Jobgether is an AI-powered matching platform that helps job seekers connect with companies. They ensure applications are reviewed quickly, objectively, and fairly against the role's core requirements.

• Own moderately complex backend features and services in Go on GCP end-to-end from design through production.
• Write clean, tested, production-ready code and improve it continuously.
• Contribute to infrastructure, observability tooling, and on-call preparation.

Chainguard is the trusted source for open source software, delivering hardened and secure builds to eliminate risk. The company is venture-backed by leading investors and serves Fortune 500 enterprises.

• Build and maintain backend services and full-stack features
• Develop scalable APIs and systems handling high-volume traffic
• Improve system performance, reliability, and security

Lavendo partners with startups and high‑growth companies to help them hire top‑tier sales, go‑to-market, and technical talent. At Lavendo, they partner with clients who care about building high‑performing, inclusive teams, and they hold themselves to the same standard.

• Responsible for developing, designing, and maintaining high-quality programs to meet the company's business needs.
• Responsible for solving complex technical problems, including challenges in system performance, security, and scalability.
• Actively participate in project planning, design, and development, ensuring projects are delivered on time and meet quality standards.

Gate is a leading cryptocurrency exchange that was established in 2013. With over ten million registered users, it is considered one of the safest and most reliable cryptocurrency platforms worldwide and consistently ranks among the top ten global cryptocurrency exchanges.

• 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.

• Take part in all development aspects from design through production of a dynamic hybrid/cloud native product.
• Write high quality, testable and efficient code in Go and Typescript.
• Initiate and promote new ideas for continuous improvement of the product functionality.

Torq is a cybersecurity company with an AI SOC platform that grabs attention. Backed by Series D funding, they have experienced 200% employee growth and 300% revenue growth, making them one of Forbes' Best Startup Employers in America and a Business Insider 'startup to bet your career on'.

• Build and maintain core components of the clearing house in Go on GCP, including customer onboarding flows and data ingestion pipelines.
• Take ownership of ambiguous problems and drive features from design through production with appropriate testing and observability.
• Participate in on-call rotation, contribute to incident response, and become a go-to engineer for core subsystems.

Chainguard is the trusted source for secure open source software, delivering hardened builds for enterprise customers. The company is venture-backed by leading investors and serves Fortune 500 enterprises.

• Design, build, and maintain scalable backend services and APIs for AI-powered products.
• Collaborate with cross-functional teams including ML engineers and product managers to deliver end-to-end solutions.
• Ensure reliability, performance, and scalability of production systems through proactive monitoring and optimization.

Cresta is an AI platform that transforms customer experience through conversational AI agents and real-time augmentation. The company has raised over $270 million from leading investors and is backed by a team of AI experts from Stanford and Google.

• Develop backend services and APIs using C# .NET/.NET Core with scalable, maintainable, and well-tested code.
• Integrate with third-party APIs such as payment gateways and work in cross-functional scrum teams.
• Advocate for engineering best practices and contribute to technical choices for web and mobile applications.

CreateFuture is an AI-native consulting partner that builds digital products and services for clients like PayPal, adidas, and NatWest. The company has grown to over 600 employees and is a Great Place to Work-Certified™ firm with multiple Best Workplaces UK awards.

• Build features for the 1Password Integrations Marketplace, contributing to web frontend and backend services.
• Help design and implement public-facing APIs using modern standards like REST and gRPC.
• Write clean, well-tested code across a TypeScript/React frontend and Go backend.

1Password builds the foundation for a safe, productive digital future, focusing on identity and access management. With over $400M in ARR and a spot on the Forbes Cloud 100, the company employs a remote-first, collaborative culture that values curiosity and innovation.

• 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.

• Build features, fix bugs, and gradually take on more ownership as you learn the product.
• Work with React, Typescript, NestJS, Python, and AWS.
• Leverage AI tools to move fast and learn faster alongside senior engineers.

Cello is the Revenue Growth Infrastructure for modern digital businesses, turning word-of-mouth into a systematic, measurable growth channel. They are a small, remote-first team of serial founders and operators from companies like Twilio, Wise, and Skype, with $10.3M raised and 30+ new customers every month.