the core library/language constructs.
• Knowledge of processor, memory, network and storage internals. Familiarity with I/O optimized
algorithms.
• Deep understanding of distributed systems including fault modeling, concurrency, isolation,
consensus etc.
• Internals of a RDBMS like MySQL
• Conversant with the internals of systems like Kafka, Cassandra/Scylla, Redis, RocksDB etc
• Working knowledge of hosting and network infrastructure (K8s, Envoy, etc)
• Familiarity with binary serialization protocols like thrift/protobuf/flatbuffers etc
• Familiar with gRPC, HTTP/2, QUIC, etc.
• Troubleshooting memory issues, GC tuning, resource leaks etc.
• Strong problem-solving skills, algorithmic skills and data structures.
• Productionizing machine learning pipelines using Spark/Flink/TensorFlow etc
• Familiarity with big data concepts - HDFS, hive, presto, spark, oozie, ambari, airflow, atlas,
ranger, etc. Familiarity with formats like avro, parquet, orc, arrow etc
• Good understanding of branching, build, deployment, continuous integration methodologies
• Experience in leading a team and mentoring engineers
• Attitude to get Stuff Done!
• Ability to make decisions independently.
Desired Background:
• Bachelor’s or Master’s degree in Engineering from premier institutes preferred
• 8+ years of experience in software design, development & architecture
About Olacabs.com
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Context for the Candidates:
Blockchain engineers are tasked with building secure, scalable, and high-performance decentralized applications. This discussion focuses on how to utilize key technologies—Node.js, Rust, Go, TypeScript, Ethers.js, viem, and Hardhat—in smart contract and blockchain system development, while addressing the practical challenges that arise in such projects.
Key Discussion Points:
• How do you integrate Node.js, Rust, Go, and TypeScript in blockchain-backed applications?
• Discuss the trade-offs between using Rust or Go for performance-critical blockchain services.
• What are the key challenges in ensuring the security and scalability of smart contracts using tools like Ethers.js, viem, and Hardhat?
• How do you approach testing, debugging, and deploying smart contracts in a decentralized environment?
• Share best practices for gas optimization, contract upgradability, and backend scalability.
Evaluation Criteria:
1. Technical Knowledge:
• Strong knowledge of Node.js, Rust, Go, and TypeScript with practical experience in blockchain development.
• Proficiency in Ethers.js, viem, Hardhat, and smart contract lifecycle (development, testing, deployment).
• Understanding of security best practices, performance optimizations, and scalability in decentralized systems.
2. Problem-Solving and Integration Skills:
• How candidates approach integrating smart contract solutions with backend services using Node.js, Rust, Go, and TypeScript.
• Solutions proposed for common challenges in blockchain projects such as gas fees, security vulnerabilities, and system bottlenecks.
3. Experience and Expertise:
• Minimum of 2 years of IT experience, including hands-on development with the specified technologies.
• Practical knowledge of blockchain architecture, consensus mechanisms, and decentralized application deployment.
4. Innovation and Critical Thinking:
• Candidates’ ability to think creatively about system architecture, proposing scalable and secure solutions for blockchain-based applications.
• Discussion on the future potential of blockchain technology and how the tech stack can evolve.
5. Communication and Team Collaboration:
• Clear articulation of technical challenges and how to address them in a team setting.
• Ability to lead or contribute to discussions in a way that encourages collaboration and team-driven problem-solving.
Backend - Software Development Engineer III
Experience - 7+ yrs
About Wekan Enterprise Solutions
Wekan Enterprise Solutions is a leading Technology Consulting company and a strategic investment partner of MongoDB. We help companies drive innovation in the cloud by adopting modern technology solutions that help them achieve their performance and availability requirements. With strong capabilities around Mobile, IOT and Cloud environments, we have an extensive track record helping Fortune 500 companies modernize their most critical legacy and on-premise applications, migrating them to the cloud and leveraging the most cutting-edge technologies.
Job Description
We are looking for passionate software engineers eager to be a part of our growth journey. The right candidate needs to be interested in working in high-paced and challenging environments leading technical teams, designing system architecture and reviewing peer code. Interested in constantly upskilling, learning new technologies and expanding their domain knowledge to new industries. This candidate needs to be a team player and should be looking to help build a culture of excellence. Do you have what it takes?
You will be working on complex data migrations, modernizing legacy applications and building new applications on the cloud for large enterprise and/or growth stage startups. You will have the opportunity to contribute directly into mission critical projects directly interacting with business stakeholders, customer’s technical teams and MongoDB solutions Architects.
Location - Chennai or Bangalore
- Relevant experience of 7+ years building high-performance back-end applications with at least 3 or more projects delivered using the required technologies
- Good problem solving skills
- Strong mentoring capabilities
- Good understanding of software development life cycle
- Strong experience in system design and architecture
- Strong focus on quality of work delivered
- Excellent verbal and written communication skills
Required Technical Skills
- Extensive hands-on experience building high-performance web back-ends using Node.Js and Javascript/Typescript
- Strong experience with Express.Js framework
- Working experience with Python web app development or python scripting
- Implementation experience in monolithic and microservices architecture
- Hands-on experience with data modeling on MongoDB and any other Relational or NoSQL databases
- Experience integrating with any 3rd party services such as cloud SDKs (AWS, Azure) authentication, etc.
- Hands-on experience with Kafka, RabbitMQ or any similar technologies.
- Exposure into unit testing with frameworks such as Mocha, Chai, Jest or others
- Strong experience writing and maintaining clear documentation
Good to have skills:
- Experience working with common services in any of the major cloud providers - AWS or GCP or Azure
Technical certifications in AWS / Azure / GCP / MongoDB or other relevant technologies
Responsibilities:
- Supporting system design, development, and maintenance
- Taking responsibility for personal technical quality standards within the team
- Assisting in defining structured practices, especially in source code management, building, and deployment
- Optimizing applications for maximum speed and scalability
- Taking initiatives to build better and faster solutions to the problems of scale
Requirements:
- Experience with NodeJS for at least 3-5 years
- Experience with technologies such as Docker, Kubernetes, and AWS
- Experience with other programming languages such as Go, Python, and Java
- Experience being in a leadership/ mentorship position for 2-3 years
- Should have built systems that have scaled to at least ten thousand users
- Should have an open mind to learn and experiment with new technologies as our needs change
Experince is 2 to 5 yrs and 5 + yrs (In-depth knowledge and hands on experience on Spring Boot & Java is mandatory
EXPERIENCE: 7 to 9 years in Java 2 Enterprise server side development. Must have applied knowledge of design patterns needed for building REST APIs and services for performance and scale.
SKILLS:
- Problem Solving and application of Object Oriented principles to development
- REST API development using Java, JAX-RPC,
- Server side development using Java, Spring Boot, Node.js
- Concurrent programming with Java
- Database programming in SQL with Oracle, MySQL or other RDBMs.
- Deployment to AWS and Kubernetes and building with Maven
- Affinity towards server side development
- Ability to understand existing code and re-engineer/re-factor/redesign.
- Written and spoken English communication and articulation.
NICE TO HAVE:
- Working knowledge of GO Lang and Python scripting
- AWS Certifications
- Working knowledge of Elastic Search based persistence and search
- Secure coding practices
EDUCATION: Bachelor or Master's degree in Computer Science, Software Engineering or Information Technology or related disciplines.
Exposure to Angular would be an added advantage
Should be willing to work in challenging environment for a start up company