Senior Software Engineer - Appmericans team

Hi, we’re Back Market.

We’re here to help make tech reliable, affordable, and better than new. We're a global marketplace for refurbished devices, helping lower our collective environmental impact by providing trustworthy, affordable tech with 92% less carbon emissions than new.

Yep, you read that right. Turns out refurbished tech is way better for the planet than new. In fact, With every device purchased on Back Market, our positive impact on the planet grows. From our Customer Care representatives to our software engineer, every individual at Back Market cuts the planet — and consumers — a break. Our mission is simple: to do more with what we already have.

Are you ready to join us?

About the team

We are looking for a Senior Software Engineer to join our Appmericans squad 💚.

Back Market is building their first engineering team in NYC!

We are looking for passionate team members to join our office of 40+ people in Union Square, and a 250+ engineering team worldwide. This team's mission is to help us spread the word about refurbished tech to save the planet and your wallet at the same time.

We are looking for a Senior Software Engineer with deep backend expertise to play a key role in our strategic US market expansion.

Our goal is to enhance user engagement by accelerating the development of innovative features and optimizing the overall customer experience across web and app platforms.

As one of the engineers in our first US-based engineering team, you will work with Software Engineers, two iOS engineers and an iOS tech lead/manager, collaborating closely on full-stack solutions that power our US customer experience. While your primary focus will be backend services and architecture, you'll also contribute to web frontend development when needed to deliver complete, end-to-end features.

Your expertise in scalable, performant backend platforms built with Go and Python, combined with your ability to contribute to modern web frontends, will be key to the team's success. You will work closely with a product manager and UX designer to ensure the right features are designed and delivered with quality and velocity. You will participate in the Back Market backend community, partnering with others to continuously improve our practices.

We’re looking for versatile engineers who show strong ownership and are motivated to take on new challenges across the technical stack while helping us move our technology forward.

You will be working in an agile "build it and run it" environment where engineering teams build, launch, monitor and support the product that they own.

Driven by the desire to craft outstanding products, you understand how to deliver seamless user experiences at scale.

We are looking for passion in creating systems by producing clean, consistent and well-organised code.

As well as a good team player supporting colleagues and creating a learning and sharing environment!


What will be your next missions?

• Build efficient micro services that power both web and mobile experiences, mastering the squad's technical stack and delivering features autonomously with comprehensive testing methodologies.

• Design and implement robust backend services using Go as the primary language, with Python where appropriate, ensuring scalability, performance, and reliability for high-quality user experiences.

• Contribute to web frontend development using modern frameworks (Vue.js/TypeScript), bridging backend and frontend by designing clear API contracts and delivering complete, end-to-end features.

• Collaborate with a cross-functional team of peers from various disciplines (iOS, Backend, Frontend, SRE, CyberSec, Data, etc.), to foster a culture of technical excellence and shared knowledge.

• Take ownership of squad-level technical projects, managing dependencies and delivering solutions that realize engineering and product visions while balancing scope with delivery timelines.

• Build and maintain observability ecosystems using tools like Datadog to track performance, errors, and core functionality, Big Query to gain data insights, and implement strategies to prevent regressions.

• Drive quality improvements by mastering the complete SDLC, delivering high-quality, non-disruptive releases to production, and taking ownership of Quality of Service enhancements.

• Participate in on-call rotation, leading incident response and chaos mitigation for squad-owned services, including hotfix processes and root cause analysis.

• Write clean, maintainable code with insightful code reviews, challenging technical approaches pragmatically and advocating for simpler solutions backed by data.

• Share knowledge through documentation and team discussions, beginning to provide valuable input on topics outside your immediate area, and supporting team members through technical guidance.
  
  Our technical environment
  

  Backend stack: Python - FastAPI , SQLAlchemy, Celery, Golang, Django (being phased out)

  Frontend stack: VueJS, Typescript, Nuxt, Revolve ( our design system)

  Data: PostgreSQL, Redis, Kafka, RabbitMQ, BigQuery

  Infrastructure: GCP, Kubernetes, Docker, Datadog, ArgoCD, CircleCI, Github

Main technical challenges

Traditionally based on a monolith, Back Market's technical stack has been undergoing a radical transformation in recent years into a distributed and service-oriented architecture. This transition provides an opportunity to modernize the platform, raising engineering standards.
Building a set of efficient and loosely coupled services is one of the main challenges to face for the years to come. But teams are excited to independently control their release schedules, manage their data, SLAs, tools, and – ultimately – be responsible for their own service-offering. Meanwhile, Platform teams are working to provide a scalable, consistent and secure platform, one that makes engineering teams more productive.

As a Senior Engineer: Produce, Innovate & Share

• Facilitates meaningful discussions around complex issues.

• Suggests or makes improvements for existing designs and architecture for quarter-bounded projects or mission-critical areas in their squad.

• Explores technologies with sizable potential impact for the team.

• Is able to contribute actively to high impact chaos mitigation.

• Identifies and advocate for prioritization of tasks that can optimize delivery
  
  Required Skills and Experience

• 5+ years of backend engineering experience with strong proficiency in Go (primary requirement) and proven experience with Python

• Solid understanding of microservices architecture, with experience building and maintaining high-traffic backend services and regular feature delivery

• Working knowledge of modern web frontend technologies (Vue.js, React, or similar) with comfort in JavaScript/TypeScript for full-stack contribution

• Demonstrated ability to deliver high-quality, non-disruptive production releases with strong SDLC knowledge and comprehensive testing experience

• Experience building observability systems (monitoring, alerting, tracing) and using data to drive improvements, with incident management and on-call experience

• Strong knowledge of databases (PostgreSQL, Redis) and message queues (Kafka, RabbitMQ), with expertise in API design (REST, GraphQL)

• Demonstrated pragmatism in technical decision-making, able to challenge approaches diplomatically and question task legitimacy when appropriate

• Excellent written and verbal communication skills with ability to explain technical concepts clearly to diverse audiences in cross-functional teams

• Proven ability to work autonomously within squad scope, managing deliverables while contributing to team knowledge through documentation and code reviews

Recruitment process

• HR screening - (45 min)

• Coding & Testing module - Backend (60 min)

• System design feature (60 min)

• Data module (45 min)

• Tech leadership + Meet your manager ( 75 min)

• BM Values (45 min)

Hybrid policy - NY office

3 days / week at the office - Monday is mandatory

WHY SHOULD YOU JOIN US ? ✌🏼

At Back Market, we’re committed to hiring and supporting diverse teams of people from all backgrounds, experiences, and perspectives — it’s one of the reasons we’re such a high-scoring certified B Corp company (93.2).

No matter your role and seniority level, you’ll enjoy impact-driven work with hands-on career development in an innovative, driven, and fast-paced environment — with benefits to match, like:

- A mission driven work environment where your day to day makes an impact on the planet. Seriously.

- Hybrid work environment, with 2 remote days a week and 1 remote work week per quarter, plus 3 flex days.

- Employee Resource Groups, including mentorship programs, comprehensive accessibility policies, and cultural competency training.

At Back Market, we strive to create a workplace that embodies the world we’re trying to change. We’ve embedded our diversity, equity, and inclusion principles into our DNA — from dedicated staff to employee resource groups to our company values.

We know that the perfect background for a role doesn’t mean the perfect fit — we encourage you to apply for a role even if you think you may not have all the qualifications.

If reasonable accommodations are needed for the interview process, please do not hesitate to discuss this with the Talent Acquisition Team.