hirly

AppsFlyer

Senior Backend Engineer

Warsaw

See how you match this job — and similar ones. Free.

Upload your resume and hirly scores it against this role at AppsFlyer first, then against similar open jobs, and shows where you fit and why.

PDF or DOCX, up to 12MB. No sign-up to see your matches.

Get past the screening software and onto a recruiter's desk

hirly rewrites your resume for this job — matching the keywords and skills in the posting, moving your most relevant experience to the top, and writing a cover letter to fit. About 30 seconds.

  • Keywords matched to this posting
  • Fit score before you apply
  • Cover letter included
Tailor my resume for this job →

Apply from your AI assistant

Connect hirly to Claude and ask it to apply to this job. hirly tailors your resume, fills the employer’s form and asks before sending. ChatGPT: manual setup today.

Some employer sites stop an application at a CAPTCHA or sign-in and hand it back with a link. Applying needs a paid plan. Works with any assistant that supports MCP.

hirly's read of this role

Role family
Engineering
Seniority
Senior
Country
PL
Work mode
Remote-friendly
First seen by hirly
11 Oct 2026

Derived automatically from the posting. Upload your resume above to see how the role scores against it.

the posting

AppsFlyer is the market leader in the mobile attribution business. We provide analytical tools to help thousands of app developers and agencies reach decisions about where, when, and how to market their apps.

We do this by consuming enormous amounts of data and presenting it in useful (and cool!) ways that are actionable and provide real and immediate value to our customers.

We are looking for an experienced full-stack developer to join our Management team. The Management team manages a variety of services and tools, external and internal. Our missions include diverse business cases, a wide range of APIs, implementation of third-party services, and collaboration with multiple other teams in the company.

Our team uses technologies and frameworks such as (buzzword alert): Node.js, React, Go, AWS, GCP, Kafka, Neo4j, GraphQL, Protobuf, Redis, PostgreSQL, among others.

The Management team is part of the SaasLab group which owns the SaaS platform and control plane of AppsFlyer - the foundational layer that manages users, accounts, billing, API gateway, authentication, permissions, and business integrations. SaasLab’s systems serve as the backbone for every product and feature at AppsFlyer, handling millions of API calls daily and supporting thousands of enterprise customers worldwid

What You'll Do

End-to-end development of AppsFlyer products and features, from front-end to back-end

Collaborate with Product Designers, Product Managers and Software Engineers to deliver amazing products

Build & ship features at high pace in a fast-moving AI development environment

Design, develop, and maintain scalable backend and frontend systems.

Develop complex applications using modern Full Stack technologies.

Work with microservices, event-driven architectures, and distributed systems.

Continuously learn and evaluate new technologies in the everlasting effort to perfect our products

Contribute to a strong engineering culture of ownership, collaboration, quality, and continuous improvement

What You Have

5+ years of software development experience, with strong backend engineering skills

Proven track record owning end-to-end solutions with minimal supervision, from ambiguous problem to production

Strong frontend and backend engineering skills, with deep expertise in React, TypeScript, and modern web development practices

Solid system design and architecture skills, able to reason about trade-offs across a system's moving parts, not just the code you touch

Comfortable with ambiguity and lower-clarity problems, able to balance moving fast with doing it right

Deep experience with modern development practices (unit and integration testing, CI/CD pipelines, code quality, observability)

Highly product-oriented, you think beyond "just code" and understand how customers actually use what you build

Experience mentoring other engineers and setting a technical bar through code review and example

Experience using AI tools within the software development lifecycle, including the ability to review, validate, and improve AI-generated code

Proficiency in written and verbal English

B.Sc. in Computer Science or equivalent practical experience

Bonus Points

Experience with SaaS platform systems — identity, access management, billing, multi-tenancy, API gateways, or similar control-plane domains

Experience working on core entity systems, identity/account management, or SaaS onboarding flows

Experience with Node.js, GraphQL, or graph databases (Neo4j)

Experience with platform/infrastructure teams that serve internal engineering customers

Experience in the ad-tech ecosystem, preferably with hyper-scale systems

Recommended by an AppsFlyer employee

As a global company operating from 25 offices across 19 countries, we reflect the human mosaic of the diverse and multicultural world in which we live. We ensure equal opportunities for all of our employees and promote the recruitment of diverse talents to our global teams without consideration of race, gender, culture, or sexual orientation. We value and encourage curiosity, diversity, and innovation from all our employees, customers, and partners.

“As a Customer Obsessed company, we must first be Employee Obsessed. We need to make sure that we provide the team with the tools and resources they need to go All-In.” Oren Kaniel, CEO

Original posting on AppsFlyer's site ↗

Listed on hirly, a job board. hirly is not the employer: AppsFlyer is hiring for this role.

Browse similar roles

Want this one?

Upload your resume and hirly rewrites it for this job and writes the cover letter — in about thirty seconds, before you sign up.

Tailor my resume for this job