Top Software Engineer Jobs in Berlin

The Software Engineer will design, develop, and maintain APIs, optimize backend services, and collaborate with cross-functional teams at Speechify.

Build and maintain Ergodic AI’s AI platform across back-end and front-end systems. The role involves developing with Python web frameworks and JavaScript/TypeScript, integrating with client technology stacks and workflows, applying AI, ML, and LLM concepts, and contributing to DevOps, cloud deployment, testing, and infrastructure practices. As an early-stage hire, the engineer will help shape the product and solve complex data and AI challenges.

Develop and maintain marketplace features using JavaScript, React, and Meteor while helping transition to a TypeScript-based architecture. Responsibilities include code reviews, refactoring, automated unit and integration testing, architecture and process improvements, and collaboration with team members.

Develop and integrate reinforcement learning agents into autonomous aerial systems, ensuring reliability and performance. Collaborate with teams and enhance the software stack while mentoring peers.

As a Software Engineer at Helsing, you will develop Ground to Air HMI software, overcoming complex engineering challenges, reviewing code, and mentoring others while collaborating closely with a team focused on ethical AI applications in defense.

The Software Engineer will develop AI-based capabilities, maintain software stacks, mentor others, and tackle engineering challenges across various technical fields.

Develop software for an autonomous aerial platform, focusing on mission control systems, real-time sensor processing, and system integration while ensuring reliability and performance standards.

The Software Engineer will build simulation and validation environments for autonomous air systems, focusing on frontend solutions and UI development for complex data visualization, human-autonomy integration, and real-time interfaces, while ensuring reliable code and performance.

Develop reusable automated testing frameworks, tooling, and quality gates for data pipelines and products. Integrate quality checks into CI/CD workflows, improve pipeline observability, coach delivery teams, and help engineers maintain effective automated tests. Investigate system risks, validate product areas, review check effectiveness, and establish engineering standards across the Quality Engineering function.

Design, build, and maintain Joybuy backend systems focusing on performance, availability, concurrency, security, and scalability. Mitigate technical risks, implement monitoring and rollback strategies, research and adopt new technologies, and identify integrations to improve architecture and team technical growth.

The Software Engineer will support data collection for AI model training by enhancing the ingestion pipeline, collaborating with scientists, and managing cloud infrastructure.

Build and architect high-performance advisory brokerage services for block trading, portfolio management, and IRA products. Develop frontend and backend systems, databases, and distributed architectures with strong concurrency, scalability, availability, and low-latency performance. Design order management and financial transaction systems while contributing across the technology stack in an early-stage environment.

Build and ship full-stack features for a data intelligence SaaS platform, spanning backend services and frontend interfaces. Use AI coding assistants to accelerate development while applying sound engineering judgment. Participate in architecture discussions, code reviews, testing, incident response, troubleshooting, documentation, and knowledge sharing. Partner with product managers to translate requirements into technical solutions. The role emphasizes SaaS architecture, AWS cloud fundamentals, Docker, Kubernetes, CI/CD, agile delivery, autonomy, and production ownership.

Build and maintain a production-grade iOS application using Swift and SwiftUI, integrating AI features through backend APIs. Design reliable AI interaction patterns, optimize performance, memory, and battery usage, capture user feedback for AI evaluation, and collaborate with backend and ML engineers. Maintain App Store quality, monitor production issues, and deliver responsive, stable experiences despite latency, partial failures, and non-deterministic AI behavior.

Designs and maintains globally distributed authentication and storage microservices using OCaml and Rust. Responsibilities include architecture design, API support, regression and performance testing, test coverage improvements, code reviews, and secure systems development. The role requires Linux programming and debugging, HTTP-based protocols, asynchronous and multithreaded networking, Kubernetes networking and deployment knowledge, and strong technical communication. Experience with distributed systems, Cassandra, OAuth/OIDC, LDAP, and Linux profiling tools is advantageous.

Design, build, and optimize backend services for data gathering, processing, and delivery. Define and maintain service contracts, ensure high test coverage, observability, and documentation. Make architectural decisions for distributed systems, collaborate with product teams, and maintain/ improve an existing Kotlin/Java codebase.

Lead backend development of Diabolocom's Voice Squad, building and optimizing core telephony services (call routing, media handling). Design and implement distributed systems, refactor for scalability and faster delivery, work across Java/Kotlin/Go, Spring Boot, PostgreSQL, RabbitMQ, Redis, Docker. Mentor teammates, own architectural decisions, improve existing codebase, and drive high-performance, reliable voice platform.

Design and operate customer-facing networking APIs, Python orchestration control planes, and automation that configures routers across global points of presence. Build resource allocation, job queues, retries, rollback, reconciliation, BGP, WireGuard, GRE, NAT, firewall, DNS, cloud interconnect, and Envoy xDS integrations. Own production monitoring, incident response, billing synchronization, API compatibility, and network configuration drift detection across application and infrastructure layers.

Develop and maintain Joybuy backend services for European retail markets, emphasizing high performance, availability, concurrency, security, scalability, and global integration. Mitigate technical risks, implement monitoring and rollback strategies, research and adopt new technologies, and collaborate with product teams across marketing, fulfillment, and supply chain.

Lead architecture and backend development for international core systems, ensuring high availability, concurrency, security, and scalability. Design Java/Spring Boot services, optimize performance, integrate MySQL/Redis/Kafka, manage technical risk, drive productization, mentor engineers, and coordinate with suppliers and product teams. Onsite role in London supporting European operations.

Develop and harden ThinkRail by building VS Code and IntelliJ plugins, implementing the language server (analysis, completion, diagnostics, verification), improving the spec-to-code evaluator, and integrating with AI agent frameworks and protocols.

Design, implement, maintain and test backend payment services within the Avaloq Banking Suite. Own payment modules end-to-end, run process analysis, translate requirements into designs and user stories, integrate third-party systems, improve reliability/observability, participate in code reviews, and support incident response and lifecycle management.

Build and maintain Camunda 8 backend data-layer services across relational databases and Elasticsearch/OpenSearch. Design scalable storage, query, retention, streaming, and secondary-storage solutions; investigate production data issues; improve performance and operability; and deliver engineering initiatives collaboratively with Product, QA, Support, and SRE. Participate in L3 support and on-call rotations.

Senior IC responsible for designing and implementing core banking systems that integrate digital assets, stablecoins and blockchain. Own end-to-end projects, make system-level design decisions, collaborate with product and clients, ship reliable, low-latency backend services, and mentor junior engineers.

Build and own end-to-end customer-facing features and APIs, maintain web app security and performance, and develop scalable multi-modal ingestion pipelines. Model the construction ontology and project graph, implement entity resolution, integrate with customer systems, and contribute to workflow/platform abstractions, evaluation tooling, and human review surfaces to support auditable, evidence-linked AI outputs.