Source Job

Global

  • Design and optimize scalable APIs and distributed services for mission-critical fraud detection technology.
  • Investigate complex technical issues through root cause analysis and performance testing.
  • Collaborate cross-functionally to deliver robust, production-ready solutions while mentoring junior engineers.

Go Node.js SQL DynamoDB Redis

20 jobs similar to Senior Backend Engineer, Core APIs

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Turkey

  • Build, scale, and maintain backend services that power core analytics systems processing hundreds of thousands of events per second.
  • Work on high-throughput, low-latency systems and contribute to event ingestion pipelines, API development, and data enrichment.
  • Write clean, modular, and testable code using Go and Node.js, focusing on building systems that scale.

Insider One is the #1 platform for marketing and customer engagement teams, integrating data, personalization, and journey orchestration across multiple channels. It is a woman-founded, women-led B2B SaaS unicorn with 1,500+ team members across 30 offices, backed by top investors and trusted by Fortune 500 companies.

APAC

  • Build and maintain high-performance APIs and microservices in Go for payment processing, fraud detection, and authentication.
  • Take end-to-end ownership of features and integrations from design to production rollout and monitoring.
  • Work cross-functionally with Product, Compliance, and Business teams to deliver elegant technical solutions.

Yuno is a payment orchestrator that connects businesses to 300+ payment methods worldwide through a single integration. Founded by the team behind Rappi, Yuno is growing fast as a remote-first company with a culture of ownership and collaboration.

US Unlimited PTO

  • Architect and implement scalable, performant, and secure software solutions for backend distributed platforms.
  • Provide technical leadership, write clean code, and conduct code reviews to ensure best practices.
  • Collaborate cross-functionally with product managers, designers, and engineers to translate business requirements into technical specifications.

Dave is a financial app that builds products to level the financial playing field for Americans who are financially vulnerable or living paycheck to paycheck. As a public fintech company, it offers a digital financial platform with products like ExtraCash and is focused on creating accessible credit options.

Global

  • Design and build highly scalable systems supporting millions of transactions across multiple countries and regulatory environments.
  • Develop cross-border transaction infrastructure, tax compliance, and international post-purchase experiences.
  • Partner with internal logistics, payments, and platform teams to build durable long-term infrastructure.

Whatnot is the largest livestream shopping platform in North America and Europe, enabling sellers to build real businesses across hundreds of categories. We're a remote co-located team of over 1,000 employees, one of the fastest growing marketplaces, and recently named #1 Best Startup Employer in America by Forbes.

US Unlimited PTO

  • Craft streamlined user flows and build robust APIs for bank administrators and customers.
  • Write clean, thoroughly documented, and well-tested code with emphasis on error handling and edge cases.
  • Provide technical guidance and code reviews, raising the bar for teammates.

Alkami provides a digital sales and service platform for U.S. banks and credit unions. Founded in 2009, it is a fast-growing SaaS company with a culture recognized as Best Place to Work in Fintech and Best Company Culture.

US Unlimited PTO

  • Architect, build, and evolve backend APIs and services supporting millions of users and sports organizations.
  • Lead ambiguous technical initiatives from discovery to production, improving reliability and scalability.
  • Partner with cross-functional teams and mentor engineers to deliver durable backend systems.

TeamSnap is a sports communication platform that simplifies administration for youth sports. They are a remote-first company since 2009, recognized as a Best Place to Work, with a culture of trust, inclusivity, and growth.

Global

  • Design and develop backend microservices for telecom platform modules including Identity, RBAC, and billing pipelines.
  • Integrate with external carrier APIs, event-driven systems like Kafka, and workflow orchestration tools such as Temporal.io.
  • Collaborate with Frontend Engineers and Business Analysts to define API contracts and participate in CI/CD and code reviews.

Miratech is a global IT services and consulting company that helps visionaries change the world by supporting digital transformation for large enterprises. The company retains nearly 1000 full-time professionals, achieves over 99% project success rate, and has more than 30% year-over-year revenue growth.

Mexico

  • Design and build the control plane for provisioning, scaling, and maintaining Postgres clusters.
  • Develop high availability, disaster recovery, and data protection mechanisms for production systems.
  • Build automation for database operations and contribute to distributed, fault-tolerant systems.

PlanetScale builds a next-generation managed database platform powering mission-critical applications at global scale. They are a remote-first engineering team with a collaborative culture focused on technical excellence and knowledge sharing.

US Unlimited PTO

  • 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.

India

  • Collaborate with global teams and client stakeholders to design scalable solutions aligned with business objectives.
  • Build and deliver high-quality backend services using agile practices like TDD and CI/CD.
  • Take ownership of infrastructure automation, deployment pipelines, and production support for mission-critical systems.

Our partner builds complex, large-scale systems for enterprise and public sector clients. They emphasize agile practices, continuous delivery, and a collaborative engineering culture.

Latin America

  • Lead the design and development of new features and critical improvements for our products and services, ensuring security, performance, and test coverage.
  • Make architectural decisions and propose system-level technical improvements, including implementing high-performance components in Rust.
  • Mentor junior and mid-level engineers, conduct rigorous code reviews, and participate in technical planning and roadmap definition.

Skydropx is innovating logistics by leveraging AI and human collaboration to build scalable software products. The company offers a dynamic, ambitious, and multicultural environment for career growth.

UK

  • Design, build, and scale backend services powering a large-scale observability platform, including telemetry ingestion, storage systems, query engines, and alerting pipelines.
  • Develop and optimize distributed systems that process logs, metrics, and traces at high volume with a strong focus on reliability and performance.
  • Collaborate with cross-functional engineering teams to improve system architecture, scalability, and developer experience.

Global

  • Lead design and delivery of regional system capabilities across BJAK’s platform.
  • Translate multi-country business, operational and regulatory requirements into scalable system architecture.
  • Build platform capabilities that allow insurance workflows to adapt across different markets.

BJAK uses AI, automation and backend systems to power end-to-end insurance operations. We are a growing, fully remote team focused on scalable platform delivery.

Unlimited PTO

  • Design, develop and maintain services written in Go and Python powering ExtraHop's products.
  • Lead and participate actively in agile development processes, code reviews, and technical strategy discussions.
  • Provide technical leadership to junior team members and foster a culture of excellence and collaborative problem solving.

ExtraHop is a cybersecurity company that provides Network Detection and Response (NDR) solutions to protect enterprises from cyber threats. With a culture rooted in values like leading with purpose and acting with integrity, the company has been empowering connected enterprises since 2007.

UK

  • Design, develop, and optimize scalable shared backend services using Java and serverless technologies (AWS Lambda).
  • Design and implement RESTful APIs and event-driven systems, contributing to frontend components as needed.
  • Collaborate with cross-functional teams, mentor junior developers, and maintain CI/CD pipelines for high-quality software delivery.

Turnitin is a recognized innovator in global education, partnering with educators and institutions for over 25 years to develop learning integrity solutions. With over 16,000 academic institutions and team members in 35+ countries, the company fosters a remote-first culture focused on purpose, accountability, and well-being.

United States

  • Design, develop, and maintain backend services using TypeScript and NestJS.
  • Architect and implement scalable APIs, integrations, and event-driven systems.
  • Build and optimize high-throughput workflows that process large volumes of transactions and data.

Pragmatike is recruiting on behalf of a fast-growing technology company building critical infrastructure that powers high-volume, real-time business operations across multiple systems and platforms. They seek a Backend Software Engineer to join a high-ownership engineering culture where developers are encouraged to move quickly and solve meaningful technical challenges.

UK Germany Spain Ireland Sweden 6w PTO

  • Work with your team to deliver new functionality, then use results to iterate and improve.
  • Take an active role in influencing our roadmap and your career objectives.
  • Mentor and support other team members, participate in design discussions, and collaborate with the team.

Grafana Labs is the company behind the open observability cloud, Grafana Cloud, built on open-source principles. With over 1,600 team members across 40+ countries, we foster a global collaborative culture backed by leading investors.

India

  • Design and build privacy-focused systems that protect users from tracking, data misuse, and emerging online threats.
  • Enhance backend services and privacy infrastructure using Go, Node.js, Python, or Perl.
  • Lead complex technical projects from ideation through implementation, ensuring scalability and reliability.

Our partner is a privacy-first engineering organization focused on building and maintaining systems that protect users from tracking, profiling, and emerging online threats. They operate in a fully remote, globally distributed environment with a values-driven culture centered on trust, privacy, and transparency.

Poland Europe

  • Write readable, scalable, and easy-to-maintain JS/TS code with OOP flavor.
  • Design and modify DB structures, assess long-term impact, and propose alternatives.
  • Maintain continuous client contact, foster relationships, and lead backend best practices.

We are a tech company building cutting-edge solutions with React, Node.js and TypeScript. We work with well-established companies and startups, providing a diverse and challenging environment with a close-knit team of experts.

Global 16w maternity 16w paternity

  • Complex and meaningful challenges enabling people and businesses to operate globally with ease.
  • Significant impact on business growth with freedom to organize work and life around your needs.
  • Competitive salary, stock options, flexible paid time off, and a supportive, kind work environment.

Remote is a global employment platform that helps businesses hire, pay, and manage international teams compliantly. With a fully remote workforce across 6 continents and a culture focused on innovation and automation, the company supports asynchronous work and provides a supportive environment.