Hand-curated positions in niche programming languages
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Chennai, India
Mainframe Developer developing and enhancing payment and cash management systems with COBOL, JCL, and DB2, focusing on design and development, technical analysis, and testing and bug fixing for online and batch applications.
Daytona Beach, FL, USA
Mission Systems Software Developer designing avionics and flight simulation solutions for defense aircraft platforms. Ada, C, C++, C#, Java, and Python with Agile, focusing on embedded real-time software and Operational Flight Program development.
New York, NY, USA | Seattle, WA, USA | San Francisco, CA, USA
Formal methods engineer role building automated verification tools for smart contracts. Requires experience with model checking, SAT/SMT solving, and programming language theory.
Philadelphia, PA, USA
Frontend Engineer building user-centric eCommerce experiences with Elixir and Phoenix, working across HTML, CSS, and JavaScript to deliver seamless interfaces for motorcycle and powersports brands, and focusing on quality, testing, and continuous delivery in a collaborative team environment.
Remote, Europe
Senior Software Engineer building cloud-native observability systems with Rust and Angular, processing terabytes of data daily on AWS with Kubernetes, and focusing on distributed systems, in-stream analytics, and full-stack product development for a modern monitoring platform.
Courbevoie, France
Senior Developer building debt collection and dispute management applications for factoring operations. Requires experience with IBM Z/OS, COBOL, and DB2.
Strasbourg, France
Full-cycle analysis and development role for the "Cardlink" Monetics Sector supporting foreign banks. Requires a Bac+4/5 degree and proficiency in both COBOL and C#.
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.
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.
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.
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.
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 Solution Architect designing data management and value creation solutions with Kafka, Spark, and Scala, focusing on data governance, architecture, urbanisation of the IS, and co-constructing specifications with data engineers.