Full-Time
Senior Backend Engineer
Updated on 9/4/2026
A11
Hands-on operations for scaling tech startups
No salary listed
Berlin, Germany
In Person
 Software Engineering (1) |
|---|
Get referred to A11
See people who can refer or advise you
- Seven or more years of backend engineering experience, with a track record of owning critical systems in production.
- Deep expertise in Java with Spring Boot and strong familiarity with Python in a polyglot codebase.
- Proven experience designing distributed systems, including event-driven architecture, microservices, and data pipelines.
- Strong command of PostgreSQL and experience working with cloud-native infrastructure on Amazon Web Services.
- Experience with hypergrowth or scale challenges.
- Ability to improve the effectiveness of other engineers through feedback and technical clarity.
- Ability to operate in ambiguity and shape requirements rather than only execute them.
- Take ownership of complex backend systems from design through production, including architecture, implementation, and long-term maintenance.
- Lead technical discussions, drive engineering decisions, and document trade-offs clearly for the team.
- Mentor junior and mid-level engineers through code reviews, pairing sessions, and structured feedback.
- Identify systemic weaknesses in the infrastructure, propose improvements, and execute them with minimal direction.
- Collaborate across engineering, product, and data to align technical direction with business goals.
- Drive improvements to observability, reliability, and performance across the backend stack.
- Participate in technical interviews and help define the engineering bar.
A11 embeds its team of experienced operators into fast-growing tech companies to act as an external operations team that drives internal growth. By working alongside founders and business leaders, A11 helps scale various functions from within the client organization, using hands-on, in-house leadership to accelerate expansion. The product works by integrating its operators into the client’s teams, taking on operational roles and driving change across functions such as growth, product, and operations, effectively serving as interim management and growth consulting. What sets A11 apart from competitors is its bench of operators who have already scaled companies to billion-dollar valuations and its ability to embed deeply into a company’s day-to-day operations, rather than offering purely advisory services. Its goal is to help founders navigate rapid growth, optimize scaling processes, and build the operational capabilities needed to achieve large-scale success.
Company Size
N/A
Company Stage
N/A
Total Funding
N/A
Headquarters
N/A
Founded
2025
Get referred to A11
See people who can refer or advise you
Simplify's Take
What believers are saying
- A11’s Berlin recruiting stayed hot, with 45-plus live roles in September 2026.
- ARX Robotics raised a €42 million Series A after A11 built its team.
- Trade Republic launched new trading technology in July 2026, sustaining A11 relevance.
What critics are saying
- Clients internalize A11’s playbook, shrinking recurring demand by 2027.
- A11 still depends on founder-led relationships, especially Jan Miczaika and Moritz Claussen.
- Losing Trade Republic or Sennder would break the reference flywheel and threaten viability.
What makes A11 unique
- Jan Miczaika and Moritz Claussen bring Wooga and cargo.one scaling credibility.
- A11 embeds operators directly inside clients, not an external slide-deck consultancy.
- Public proof points include Trade Republic, Sennder, and ARX Robotics team builds.
Help us improve and share your feedback! Did you find this helpful?
Benefits
Flexible Work Hours
Paid Vacation
Holiday Breaks?
Remote Work Options
Wellness Program