Tech Lead Python

Join the Money Platform, International team to design and build payment infrastructure across countries and currencies, including multi-currency accounting and reconciliation, integrations with international banking rails (SEPA, BACS, SWIFT), and both greenfield (0→1) and scaling (1→N) work. Role requires 5+ years of backend or platform engineering experience, strong systems design, distributed systems and reliability expertise, and cross-functional collaboration.

Join Fastly’s Compute Platform team to design and implement hosting infrastructure for a serverless edge platform. Responsibilities include writing platform-level Rust code (handling back pressure, resource limits, inter-service interactions), coordinating across teams, driving projects as a technical lead, addressing performance and stability at scale, and participating in on-call rotation. The role requires at least 7 years of software development experience (with at least 3 in high-reliability systems programming) and familiarity with asynchronous and concurrent code; experience with multiprocess scheduling, memory management, systems optimization, multi-tenant security, and open-source contribution is desirable.

Lead and develop an 8-person engineering team responsible for roadmap and execution of anomaly and signal detection systems that combine distributed systems and ML/LLM. Work closely with product and applied scientists to build and evaluate production ML/LLM systems at scale; the role is based in New York with a hybrid workplace. Reasonably estimated salary range for this role is $192,000–$240,000 USD per year.

Join MetaMask's Predict team to design and implement front-end components (React/React Native) and backend services/APIs for prediction markets integrated into the wallet. Responsibilities include on-chain protocol integration, real-time market data handling, transaction signing, performance and security optimization. Remote role with explicit coverage for United States and Canada and regional coverage for LATAM and EMEA; applications from candidates based in France, Italy, or Germany are not being considered.

Close seeks a Senior Product Security Engineer to lead application/product security across a Python/TypeScript stack deployed on AWS (Kubernetes, Docker). Responsibilities include threat modeling, finding and reproducing vulnerabilities, owning vulnerability intake (HackerOne, scanners, pen tests), tuning and automating SAST/DAST and other tooling, improving dependency and secrets management, supporting SOC 2 and audits, and participating in incident response.

Role involves finishing or verifying diagnoses of long-tail WebCompat site-breakage bugs, writing WebCompat interventions and simple (often AI-assisted) fixes, and reproducing/triaging incoming reports. Requires solid web development skills (HTML, CSS, JavaScript), strong browser DevTools and cross-browser diagnosis experience; Gecko and WebCompat/web-standards experience are preferred.

Senior engineer role focused on designing, implementing and operating back-end systems and cloud data pipelines for email security. Responsibilities include technical leadership and mentoring, enforcing data quality (validation, anomaly detection, SLA alerting), troubleshooting production incidents, and defining engineering best practices (code reviews, CI/CD, DataOps). Requires 8+ years professional software or data engineering experience (with >=4 years on cloud data platforms), strong Python skills, and experience with cloud, containers, observability and secured APIs.

Staff Data Engineer for the Enterprise Data Warehouse focused on designing and operating enterprise-scale data platforms, semantic layers, and downstream analytics. Requires strong SQL and Python skills, experience with cloud data warehouses (BigQuery preferred), CI/CD and orchestration tools (Jenkins, Airflow), data modeling, performance tuning, and mentoring other engineers. Remote role; must be legally permitted to work in the United States. Salary range (for listed US locales) $120,000–$190,000/year.

Work on the Elasticsearch Inference API and plugin: design protocols, implement streaming (SSE) and async execution, handle schema negotiation, rate limiting, chunking and billing integration. Collaborate with the wider inference and Kibana teams, participate in on-call rotation, review OSS contributions, and write unit and integration tests. Requires 5+ years production Java experience.

Work on the Elasticsearch Inference API and plugin framework to integrate internal and external inference providers (including Elastic Inference Service and third parties). Responsibilities include protocol design, streaming (SSE), async execution, billing integration, rate limiting, reviewing contributions, participating in on-call rotation, and writing unit and integration tests. Requires 5+ years of production Java experience. Typical salary range: €55,800–€88,300 EUR/year.