CrawlJobs Logo

Backend Software Engineer

dualentry.com Logo

DualEntry

Location Icon

Location:
Poland , Warsaw

Category Icon

Job Type Icon

Contract Type:
B2B

Salary Icon

Salary:

100000.00 - 175000.00 USD / Year

Job Description:

Why This Role Matters Now: Since launching 18 months ago, we’ve raised $100M with backing from Lightspeed, Khosla, and Google Ventures. We got there by moving incredibly fast and hiring the best and brightest talent. To accelerate that momentum, we’re growing our team. Come and join us at one of NYC’s fastest-growing startups and have an impact on our product from day one. As our Senior/Staff Backend Engineer, you’ll design and build core systems end-to-end, architect real-time business-critical workflows, and ship production-ready features daily. This is an intense, hands-on role with full ownership. You’ll be joining at an early and defining moment. Your work will directly shape our product, customers, and trajectory. About DualEntry: Founded in 2024, DualEntry is one of NYC’s fastest-growing AI startups. DualEntry is changing the future of finance. Our AI-native ERP lets teams achieve more in less time. $5M-ARR businesses and NYSE-listed companies trust DualEntry to automate away busywork and fuel their growth with powerful reporting and insights. We’re making the one-person finance team a reality and putting the pain of legacy ERPs from the 1990s in the past. We operate with urgency and ownership. We move fast. Why you’ll thrive here: You’re joining early and will grow with DualEntry; Your feedback shapes the product directly; High-speed culture; High-trust environment with high expectations; Ambitious mission

Job Responsibility:

  • You’ll own end-to-end execution for backend systems and infrastructure
  • You’ll build APIs, services, and real-time systems handling complex accounting logic
  • You’ll collaborate with founders, product, and frontend engineering to turn complex workflows into secure, performant systems
  • You’ll design, implement, and ship production-ready features at high speed
  • You’ll manage data migrations, scaling challenges, external integrations, and end-to-end reliability
  • You’ll drive measurable outcomes that accelerate DualEntry’s product velocity and stability

Requirements:

  • 8+ years of experience in backend engineering
  • Proven track record in high-growth, high-ownership environments
  • Deep expertise in Python and modern frameworks (FastAPI, Flask, or Django)
  • Strong skills in PostgreSQL, SQL, ORMs, migrations, and schema design
  • Experience with AWS or comparable cloud infrastructure
  • Strong API design and testing experience
  • Understanding of CI/CD, deployment, and production readiness
  • Ability to manage complex systems with evolving requirements
  • Fluent English (C1+) with clear communication
What we offer:
  • Significant equity ownership in one of the top AI companies in the world
  • Equity: ~$50K USD
  • Remote-first team - the fastest team you will have ever worked with
  • Time Off: 15 PTO days + 12 public holidays
  • Visa sponsorship option for relocation to NYC within 2+ years
  • Early-stage role with high autonomy and real long-term upside

Additional Information:

Job Posted:
December 08, 2025

Employment Type:
Fulltime
Work Type:
Remote work
Job Link Share:

Looking for more opportunities? Search for other job offers that match your skills and interests.

Briefcase Icon

Similar Jobs for Backend Software Engineer

Backend Software Engineer

We're looking for a Back End Software Engineer to join our team, focused on deli...
Location
Location
United States , Austin
Salary
Salary:
122400.00 - 196600.00 USD / Year
https://www.atlassian.com Logo
Atlassian
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 1-3+ years experience with one or more prominent languages such as Java, Python, Kotlin, Go, or Scala
  • Bachelor's or Master's degree (preferably a Computer Science degree or equivalent experience)
  • Experience performing platform integrations using REST
  • A background in working with GIT in a collaborative team setting
  • Familiarity with server technologies (NPM, Docker, NGINX, Express/Node)
  • A love for working collaboratively on a team with varied strengths
Job Responsibility
Job Responsibility
  • Build REST APIs that power core customer experiences
  • Configure monitoring for backend services
  • Build CICD pipelines
  • Develop integrations with our content management system
  • Build features and services with reliability in mind
What we offer
What we offer
  • health coverage
  • paid volunteer days
  • wellness resources
  • Fulltime
Read More
Arrow Right

Principal Backend Software Engineer

As an Engineer well into your career, we know you're an expert at what you do an...
Location
Location
India , Bengaluru
Salary
Salary:
Not provided
https://www.atlassian.com Logo
Atlassian
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelors, Masters, or PhD in Computer science in a related technical field or similar experience
  • 10+ years of experience in software development and architecture
  • Expert-level experience with one or more prominent languages such as Java, C# or C/C++ is crucial
  • An expert in at least one technical topic/domain
  • Passion for collaborating with and mentoring junior members of the team
  • A real appetite for helping others learn and grow
  • Considers the customer impact when making technical decisions
Job Responsibility
Job Responsibility
  • Regularly tackle the largest and most complex problems on the team, from technical design to launch
  • Deliver solutions that are used by other teams and products
  • Determine plans-of-attack on large projects
  • Routinely tackle complex architecture challenges and apply architectural standards and start using them on new projects
  • Lead code reviews & documentation as well as take on complex bug fixes, especially on high-risk problems
  • Set the standard for thorough, meaningful code reviews
  • Partner across engineering teams to take on company-wide initiatives spanning multiple projects
  • Transfer your depth of knowledge from your current language to excel as a Software Engineer
  • Mentor more junior members
What we offer
What we offer
  • health coverage
  • paid volunteer days
  • wellness resources
Read More
Arrow Right

Senior Backend Software Engineer

Location
Location
India , Bengaluru
Salary
Salary:
Not provided
https://www.atlassian.com Logo
Atlassian
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 6+ years of experience building and developing backend applications
  • Bachelor's or Master's degree with a preference for Computer Science degree
  • Experience crafting and implementing highly scalable and performant RESTful micro-services
  • Proficiency in any modern object-oriented programming language (e.g., Java, Kotlin, Go, Scala, Python, etc.)
  • Fluency in any one database technology (e.g., RDBMS like Oracle or Postgres and/or NoSQL like DynamoDB or Cassandra)
  • Demonstrated ability to design and operate systems that deliver high availability and unwavering reliability for our customers
  • Real passion for collaboration and strong interpersonal and communication skills
  • Broad knowledge and understanding of SaaS, PaaS, IaaS industry with hands-on experience of public cloud offerings (AWS, GCP, Azure)
  • Familiarity with cloud architecture patterns and an engineering discipline to produce software with quality
Job Responsibility
Job Responsibility
  • Design, develop, and maintain robust backend systems and components focused on proactive and reactive incident management and post-incident management
  • Be part of an amazing open and collaborative work environment with other experienced engineers, process engineers, architects, and TPMs
  • Review code with best practices of readability, testing patterns, documentation, reliability, security, and performance considerations in mind
  • Leverage data to generate actionable insights that drive continuous improvements in backend performance and incident management processes
  • Mentor and level up the skills of your teammates by sharing your expertise in formal and informal knowledge sharing sessions
  • Ensure full visibility, error reporting, and monitoring of high performing backend services
  • Participate in Agile software development including daily stand-ups, sprint planning, team retrospectives, show and tell demo sessions
  • Fulltime
Read More
Arrow Right

Junior Backend Software Engineer

We're looking for a Backend Software Engineer to join our team who is passionate...
Location
Location
Poland , Gdańsk
Salary
Salary:
Not provided
https://www.atlassian.com Logo
Atlassian
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 1+ years of experience in building and developing backend applications
  • Experience in crafting and implementing highly scalable and performant RESTful microservices
  • Proficiency in any modern object-oriented programming language (Java, Kotlin, Go, Scala, or Python)
  • Fluency in any database technology (for example, RDBMS like Oracle or Postgres or NoSQL like DynamoDB or Cassandra)
  • Passion for collaboration
  • Broad knowledge and understanding of the SaaS, PaaS, and IaaS industry with hands-on experience with public cloud offerings (AWS, GAE, Azure)
  • Familiarity with cloud architecture patterns and an engineering discipline to produce software with quality.
Job Responsibility
Job Responsibility
  • Build and ship features and capabilities daily in a highly scalable, cross-geo distributed environment
  • Be part of an amazingly open and collaborative work environment with other experienced engineers, architects, product managers, and designers
  • Review code with best practices of readability, testing patterns, documentation, reliability, security, and performance considerations in mind
  • Ensure complete visibility, error reporting, and monitoring of backend services
  • Participate in Agile software development, including daily stand-ups, sprint planning, team retrospectives, and show-and-tell demo sessions.
What we offer
What we offer
  • Health coverage
  • Paid volunteer days
  • Wellness resources
  • Fulltime
Read More
Arrow Right

Principal Backend Software Engineer

Apply for the Principal Backend Software Engineer role at Atlassian and give you...
Location
Location
Poland , Gdańsk
Salary
Salary:
324900.00 - 433200.00 PLN / Year
https://www.atlassian.com Logo
Atlassian
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 10+ years of experience in software development
  • Familiarity with .NET/C# is preferred
  • Deep architectural understanding of web application
  • Experience with data structures, in particular, how they are implemented and how to apply them
  • Passion for collaborating, solving hard problems, and asking questions
  • Drive for growth, both as a developer and teammate
Job Responsibility
Job Responsibility
  • Guide projects independently, from technical design to launch
  • Apply architectural standards and start using them on new projects
  • Contribute to code reviews and documentation and take on complex bug fixes
  • Begin writing useful technical documentation
  • Mentor more junior members
  • Report directly to the Engineering Manager
What we offer
What we offer
  • health coverage
  • paid volunteer days
  • wellness resources
  • Fulltime
Read More
Arrow Right

Backend Software Engineer

We're looking for a Backend Software Engineer to join our team who is passionate...
Location
Location
Poland
Salary
Salary:
184500.00 - 246000.00 PLN / Year
https://www.atlassian.com Logo
Atlassian
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 4+ years of experience in building and developing backend applications
  • experience in crafting and implementing highly scalable and performant RESTful microservices
  • proficiency in any modern object-oriented programming language (Java, Kotlin, Go, Scala, or Python)
  • fluency in any database technology (for example, RDBMS like Oracle or Postgres or NoSQL like DynamoDB or Cassandra)
  • passion for collaboration
  • broad knowledge and understanding of the SaaS, PaaS, and IaaS industry with hands-on experience with public cloud offerings (AWS, GAE, Azure)
  • familiarity with cloud architecture patterns and an engineering discipline to produce software with quality
Job Responsibility
Job Responsibility
  • build and ship features and capabilities daily in a highly scalable, cross-geo distributed environment
  • be part of an amazingly open and collaborative work environment with other experienced engineers, architects, product managers, and designers
  • review code with best practices of readability, testing patterns, documentation, reliability, security, and performance considerations in mind
  • mentor and level up the skills of your teammates by sharing your expertise in knowledge-sharing sessions
  • ensure complete visibility, error reporting, and monitoring of high-performing backend services
  • participate in Agile software development, including daily stand-ups, sprint planning, team retrospectives, and show-and-tell demo sessions
What we offer
What we offer
  • health and wellbeing resources
  • paid volunteer days
  • Fulltime
Read More
Arrow Right

Senior Software Engineer - Backend Cloud Software Developer

Senior backend cloud software developer role working on industry's leading AI/ML...
Location
Location
India , Bangalore
Salary
Salary:
Not provided
https://www.hpe.com/ Logo
Hewlett Packard Enterprise
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Strong background in developing production software in a cloud environment
  • Development of multitenant cloud SaaS solution
  • 12+ years overall experience with 4-5 years hands-on experience in above areas
  • B.Tech/B.E in computer science or related discipline
  • Golang programming language (must)
  • Python programming language
  • RESTful API design and development
  • Data structures and algorithms
  • Cloud software technologies (SaaS)
Job Responsibility
Job Responsibility
  • Working with various providers of data sources sending telemetry to Mist's Marvis AIOps solution
  • Developing customer facing APIs used by HPE-Juniper's application developers and customers
What we offer
What we offer
  • Health & Wellbeing benefits
  • Personal & Professional Development programs
  • Unconditional Inclusion environment
  • Fulltime
Read More
Arrow Right

Software Engineer / Senior Software Engineer

ARiA is looking for highly motivated self-starters and low-ego team players to j...
Location
Location
United States , Madison; Alexandria; Seattle
Salary
Salary:
Not provided
ariacoustics.com Logo
Applied Research in Acoustics
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Applicants selected for employment will be subject to a government security investigation and must meet eligibility requirements, including U.S. citizenship, for access to sensitive information
  • Bachelor’s degree or greater in a relevant technical field (Computer Science, Engineering, or equivalent)
  • Expertise designing and developing code using modern programming/scripting languages such as C, C++, Golang, JavaScript (and variants), and Python
  • Expertise developing and deploying software in an agile, continuous-integration (CI) framework across a variety of hardware platforms (desktop, server, cloud) using modern tools including containerization (e.g., Docker, Kubernetes)
  • Exceptional ability and desire to acquire new knowledge and skills to solve challenges
  • Ability to work independently but collaboratively
  • Ability to manage multiple projects in a fast-paced professional office environment
  • Ability to communicate technical solutions to colleagues and customers
  • Superior oral and written communications skills
Job Responsibility
Job Responsibility
  • Algorithm and software design, development, research, and testing to support prototypes and products
  • Supporting the transition of research algorithms to fielded systems
  • Preparing documentation to summarize design and status of prototypes and products
  • Assisting with in-field integration, testing, and support, with some local travel required
  • Developing an interface between a C++ underwater-acoustics physics engine and a video game for education and training
  • Developing a JavaScript backend for a scenario-design and management tool for players and integration of that system with a learning-management system (LMS)
  • Developing algorithms and software for a cloud-deployed cognitive tool that allows natural-language query of legal documents to answer user questions about government regulations and supporting the DevOps process for deployment of the prototype
  • Fulltime
Read More
Arrow Right