Hand-curated positions in niche programming languages
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Strasbourg, France
Analyst Developer building merchant declaration applications for card payment acquiring systems. COBOL and C# with requirements analysis, specifications, and full lifecycle development.
Strasbourg, France
Systems Analyst & Developer for Credit Card Management Applications using COBOL, DB2, VSAM, and C# to enhance and maintain payment systems.
Nantes, France
Mainframe Analyst Developer joining a team enhancing time and activity management solutions (leaves, telework, on-call). Responsibilities include analysis, development (COBOL, DB2, IMS), testing, documentation, and user support. Collaborates with experts on high-impact projects.
Nantes, France
Develop and maintain mainframe applications covering the Basel regulatory functional scope for Credit Risk. Requires a Bac+4/5 degree and proficiency in COBOL/DB2.
Courbevoie, France
COBOL Analyst Developer leading application maintenance and development for factoring and invoice management systems. COBOL and DB2 on IBM z/OS, with C# as a plus, focusing on incident resolution, specifications, and project delivery.
New York, NY, USA
Senior Software Engineer building streaming platform client libraries and infrastructure. Rust with Java, Go, and Python bindings, focusing on high-throughput streaming, performance optimization, and distributed systems.
Düsseldorf, Germany
Apprenticeship focused on developing securities processing systems. Training starts with COBOL and DB2 on mainframe, later transitioning to Java, Spring Boot, Angular, and Kafka. No experience required. German required; English preferred. Starts August 2026
Frankfurt am Main, Germany | Düsseldorf, Germany
COBOL Developer maintaining and modernizing securities processing platform applications. Requires strong COBOL and DB2 experience with mainframe application development. German (C1) and English (B2) required.
Frankfurt am Main, Germany | Düsseldorf, Germany
COBOL Developer building settlement and depot transfer systems, migrating mainframe applications to microservices architecture. Requires strong COBOL and DB2 experience with mainframe development. German (C1) and English (B2) required.
Utrecht, Netherlands
Scala Developer building event-driven backend platforms for consumer parcel tracking and delivery services. Scala with Kafka, ZIO, and cloud-native on Azure with Kubernetes and Docker, focusing on high-volume event-driven architecture and production ownership.
Utrecht, Netherlands
Backend Developer architecting the Unified Consumer Profile, sustaining Kafka-to-BigQuery pipelines and Spanner persistence layers to hydrate real-time product experiences, focusing on Scala and Rust for core services while leveraging Python for orchestration.
London, England, UK
Elixir product engineer role building healthcare tools with Phoenix and LiveView. Full-stack development, SQL optimization, CI/CD, and infrastructure in a small, agile team. Focus on UK primary care systems with hybrid flexibility.
Remote
Freelance Blockchain Engineer building core infrastructure for decentralized web projects. Rust, Go, TypeScript, Solidity, Move, Cairo with zero-knowledge proofs and protocols including Polkadot, Ethereum, Cosmos, and Solana, focusing on security, privacy, and scaling.
Redlands, CA, USA
Senior Software Engineer developing geospatial workflow and productivity tools. Scala, Java, and REST APIs on AWS, with experience in C#, JavaScript, TypeScript, and Python, focusing on scalable web services and agile development.
Warsaw, Poland
Scala engineer building high-performance game server components using functional programming (Cats, Cats Effect, Tagless Final). Implement domain logic, testing and 24/7 Kubernetes operations, collaborating with cross-functional teams to deliver robust, scalable systems.
Remote, Spain
Senior Scala developer building distributed integration platforms using Play, Akka, Slick, sbt and PostgreSQL. Apply FP, XP practices, CI/CD and Docker/Kubernetes to design microservices, solve complex architectural problems and mentor teammates across challenging integration workloads.
São Carlos, Brazil
Mid Software Engineer building large-scale Graph products and data processing systems. Scala, Java, Python with distributed systems, ETL pipelines, and cloud platforms (GCP or AWS), focusing on scalable data solutions.
Boston, MA, USA
Senior Software Developer building high-performance back-end components for financial compliance systems. Java and Scala with Spring Boot, Maven, SQL/PL/SQL, and Kafka, focusing on RESTful APIs, event-driven workflows, and Agile delivery.
Boston, MA, USA | Jersey City, NJ, USA
Principal Quant Developer building high-quality, scalable systems for systematic investment strategies. Using Python, R, SQL, and quantitative techniques for alpha research, portfolio construction, and risk management in a fast-paced environment.
Remote, Philippines
Software engineer building and supporting a Clojure-based platform with React, Postgres, Elasticsearch and Azure. Implement features, fix bugs, handle advanced troubleshooting, contribute to CI/CD, testing and DevOps while growing into full codebase ownership.
Los Angeles, CA, USA
Software Engineer building autonomous metal 3D printing factory systems. C/C++ and Rust with high-performance systems, hardware control, and real-time data acquisition, focusing on control integration and geometry processing.
London, England, UK
Functional Programmer building a globally distributed quantitative trading platform. F#, C#, Python with Kubernetes and PostgreSQL, focusing on scheduling systems, real-time UI, and tooling for quantitative research.
Arlington, VA | Dayton, OH, USA | Minneapolis, MN, USA | Portland, OR, USA | Boston, MA, USA
Research Engineer advancing programming language theory and formal verification. Applying model checking, theorem proving, and Haskell to build high-assurance critical systems.
Remote, Latin America
Clojure role building a distributed expert system for mortgage automation using Clara Rules, AWS, and Svelte. Functional programming focus with microservices, Step Functions, and Terraform. Fintech or AI experience a plus.
Remote, USA
Scala Backend Developer building scalable server-side applications for CMS. Scala and Java with RESTful APIs, functional programming, and distributed systems, focusing on backend services and data processing.
Annapolis Junction, MD, USA
Software Engineer sustaining GHOSTGEM's mission-critical software suite, applying Rust and Python with MongoDB and RabbitMQ, while focusing on COTS/GOTS/FOSS integration, container orchestration via Kubernetes, and CI/CD automation through GitLab CI.
Grand Rapids, MI, USA
Advanced Lead Engineer developing embedded real-time software for avionics and defense systems. C, C++, Ada, Python, and RTOS (VxWorks, Integrity, Linux), focusing on software architecture, requirements, integration, and certification.
Grand Rapids, MI, USA
Senior Embedded Software Engineer developing high-assurance systems for defense avionics. Ada, C, C++ with RTOS (Linux, FreeRTOS, VxWorks), focusing on real-time embedded software, device drivers, and system integration.
San Francisco, CA, USA
Senior Software Engineer building an intelligent operating system for government tax workflows. Elixir with Phoenix LiveView, LLMs, RAG, and vector databases, focusing on automating complex processes, product UX, and cloud infrastructure on GCP with Terraform.
Nanterre, France
Data Engineer developing high-volume data processing on Hadoop and Spark platforms. Scala, Python, Spark, Kafka, and Linux/Unix, focusing on migration to cloud and industrial-quality data solutions.