Senior Software Engineer (Full Stack)

We are currently seeking a skilled Android Developer to join our team. In this role, you will be responsible for developing cutting-edge Android applications.
Responsibilities:
- Collaborate with a team of developers to design and develop Android applications
- Participate in all phases of the app development lifecycle, from planning to testing and deployment
- Implement best practices for mobile application development
- Troubleshoot and debug applications to ensure optimal performance
- Stay up-to-date with the latest technologies and trends in the Android development community
Requirements:
- Proven experience as an Android Developer, with a strong portfolio of mobile applications
- Solid knowledge of Java and Kotlin programming languages
- Experience working with Android SDK, API integrations, and third-party libraries
- Familiarity with agile development methodologies
- Excellent problem-solving skills and a keen eye for detail
- Strong communication and teamwork abilities
If you have a passion for mobile development and are excited about building innovative Android applications, we would love to hear from you. Apply now and join our dynamic team of developers!

Wallet on Telegram is your gateway to the world of digital currencies, specially tailored for individuals in emerging markets. We understand the complexities and intimidation often associated with existing crypto solutions, which is why we've designed the Wallet to be the ultimate user-friendly platform for managing finances. No need to open a traditional bank account or wrestle with convoluted crypto exchanges and wallets.
Leveraging the power of advanced blockchain technology, Wallet delivers a seamless onboarding experience into the crypto ecosystem. It enables users to effortlessly store, send, and receive digital currencies, all via the familiar interface of Telegram. Managing your finances becomes as simple as sending a message.
At Wallet, we're committed to using technology to disrupt traditional banking systems, providing our customers with more flexible and inclusive financial services. Whether you're a crypto novice or seeking to simplify your digital finance experience, Wallet is crafted with your needs in mind.
We are seeking a DevOps Engineer with at least 2 years of experience across different companies to join our dynamic team. The ideal candidate will be passionate about automating processes, setting up and tuning infrastructure services, and supporting development and QA teams. This role involves being on-call for production issues and requires strong troubleshooting and logical thinking skills.
Responsibilities:
Automate repetitive tasks to enhance efficiency.
Set up, configure, and optimize infrastructure services.
Assist developers and QA with requests related to services, environment variables, deployment pipelines, and dashboards.
Serve as a duty DevOps engineer, handling routine tasks and being on-call for production issues.
Resolve production and development issues, leveraging strong troubleshooting skills.
Adjust and rewrite Prometheus alert expressions to be non-flapping and algorithmic.
Requirements:
Understanding of networking fundamentals.
Proficiency in Linux OS, including system metrics and filesystems.
Experience with PostgreSQL.
Experience with load balancers (we use Nginx/Traefik, AWS ELB/NLB).
Familiarity with cloud services, preferably AWS.
Skilled in container orchestration using Docker and Kubernetes.
Experience with CI/CD processes, specifically with GitLab.
Knowledge of observability tools like Prometheus/VictoriaMetrics, Grafana, and ELK/EKF/OpenSearch.
Experience with Infrastructure as Code (IaC) using Ansible and Terraform.
Scripting abilities in Shell and Python.
English proficiency at an intermediate level (B1), capable of technical communication.
(Optional) Experience with Kafka, ClickHouse, RabbitMQ is a plus.
Why it is a fantastic opportunity:
Our business is growing at an exponential scale.
Work in a well-funded startup environment with unique growth opportunities and a chance to join a rapidly growing company with a unique product.
Be based remotely.
Participation in the performance review and bonus programme.
Compensation for medical expenses.
Provision of necessary equipment.
Annual vacation of 20 working days plus 10 paid days off.
14 days of paid sick leave to support your health and recovery when needed.
Access to internal English courses for continuous learning and improvement in language skills.
Wallet is an equal opportunity employer.

Wallet in Telegram is your gateway to the world of digital currencies, specially tailored for individuals in emerging markets. We understand the complexities and intimidation often associated with existing crypto solutions, which is why we've designed the Wallet to be the ultimate user-friendly platform for managing finances. No need to open a traditional bank account or wrestle with convoluted crypto exchanges and wallets.
Leveraging the power of advanced blockchain technology, Wallet delivers a seamless onboarding experience into the crypto ecosystem. It enables users to effortlessly store, send, and receive digital currencies, all via the familiar interface of Telegram. Managing your finances becomes as simple as sending a message.
At Wallet, we're committed to using technology to disrupt traditional banking systems, providing our customers with more flexible and inclusive financial services. Whether you're a crypto novice or seeking to simplify your digital finance experience, Wallet is crafted with your needs in mind.
We are seeking a Site Reliability Engineer with a foundational experience of at least 2 years and exposure to different company cultures. The role is perfect for someone passionate about building reliable, scalable systems and eager to automate operational processes. You'll collaborate with our development and QA teams to design resilient service architectures and tackle challenges related to system reliability and efficiency. This position requires a proactive approach to system monitoring, a knack for automation, and readiness to handle occasional on-call duties to swiftly address production issues.
Responsibilities:
Develop and maintain infrastructure solutions that meet our current and future needs.
Simplify our operations by automating common, repetitive tasks.
Support development and QA teams by setting up environments, services, and deployment workflows.
Participate in incident management, including on-call rotations, to quickly resolve production issues.
Use troubleshooting skills to solve complex problems, with a focus on minimizing system downtime.
Improve monitoring and alerting systems to catch issues early and reduce unnecessary alerts.
Requirements:
Basic understanding of networking concepts and their application in a dynamic environment.
Good knowledge of Linux OS, focusing on system metrics and basic performance tuning.
Practical experience with PostgreSQL, including basic configuration and maintenance tasks.
Familiarity with load balancers like Nginx/Traefik and AWS ELB/NLB to ensure service availability.
Experience with AWS cloud services and understanding their role in building scalable applications.
Experience with Docker and Kubernetes, focusing on container management and deployment.
Understanding of CI/CD principles and experience with tools like GitLab to facilitate code integration and deployment.
Knowledge of monitoring tools (e.g., Prometheus, Grafana) to keep tabs on system health and performance.
Experience with IaC tools like Ansible and Terraform for managing infrastructure as code.
Comfortable with scripting in Shell and Python to automate tasks and improve workflows.
English proficiency at an intermediate level (B1), comfortable with technical discussions.
(Optional) Exposure to messaging systems like Kafka and RabbitMQ is a plus.
Why it is a fantastic opportunity:
Our business is growing at an exponential scale.
Work in a well-funded startup environment with unique growth opportunities and a chance to join a rapidly growing company with a unique product.
Be based remotely.
Participation in the performance review and bonus programme.
Compensation for medical expenses.
Provision of necessary equipment.
Annual vacation of 20 working days plus 10 paid days off.
14 days of paid sick leave to support your health and recovery when needed.
Access to internal English courses for continuous learning and improvement in language skills.
Wallet is an equal opportunity employer.

We believe Ethereum has the potential to solve some of humanity’s most crucial coordination issues. Since our initial inception as a research group, we have sought to scale both its technology and values.
At present, the most pressing bottleneck to the growth of Ethereum is its performance and scalability. We are building the most elegant solution to this problem. We do this in the open (under an MIT open source license) because we believe in open source innovation and its ability to accelerate growth.
OP Labs is building Optimism mainnet, and by extension, the infrastructure that powers all OP-Stack chains. We are improving Ethereum’s performance by orders of magnitude and donating the profits from doing so to funding Ethereum public goods. By operating as a Public Benefit Corporation, OP Labs can align its incentives with the public good and take positive-sum steps toward a sustainable future for the internet.
We’re looking for a practical and deep-thinking Product Strategist to help craft our “emerging technology” product strategy. Today, the Superchain is the leading L2 ecosystem w/ over 10M MAUs. This role will ensure the Superchain stays at the forefront of innovation, consumer UX, and security by defining, and executing, its path to adopt new and emerging technologies.
The Superchain is rapidly evolving: blobs, permissionless fault proofs, and (coming soon!) native interoperability. Many new and exciting technologies hold promise to further differentiate the Superchain and expand the design space of what’s possible with L2s. This role will enumerate, prioritize, evaluate, and, eventually, help integrate these technologies into the Superchain.
What are the role responsibilities?
Define the vision, strategy, and product roadmap to grow the Superchain by incorporating emerging technologies such as ZKPs, shared sequencing, AI, and more
Have the technical chops to run and benchmark emerging technologies
Dig-in to Githubs, Discords, and community channels to separate signal from noise
Build lasting relationships with “frontier tech” teams to stay up-to-date on their latest developments and bring them into the Superchain
Educate the Collective on the the current state of relevant technologies and their long-term value to the Superchain
What skills do you bring?
5+ years writing production code in crypto with an emphasis on smart contracts and infra
ELI5 emerging technologies and their long-term value to our existing products
Experience identifying and interacting with the best teams in crypto
Deep strategic thinking coupled with clear, pithy writing
What will you like about us?
We take care of our employees. Competitive compensation, fully paid medical, dental, and vision, and a 4% 401K match—learn more about our benefits, culture, and all recruiting FAQ here: https://oplabs.notion.site/OP-Labs-Hiring-FAQ-79f82dd0763e4344b99e9ce3ea1728da.
We take pride in the accomplishments of our teammates and support each other in doing the best work of our careers.
Our team is a diverse group of people from varied backgrounds. We cherish our eclecticism and consider it a great strength.
We’re fully remote, deeply engaged, highly skilled, and like to have fun.
We think long-term. Our founders have been scaling Ethereum since 2015.
We strongly encourage candidates of all different backgrounds to apply. We believe that our work is stronger with a variety of perspectives, and we’re eager to further diversify our company. If you have a background that you feel would make an impact at Optimism, please consider applying. We’re committed to building an inclusive, supportive place for you to do the best work of your career.

About the Role:We are seeking a talented and motivated Blockchain & Full Stack Developer to join our growing team. As a key member, you will be responsible for building and maintaining our innovative NFT marketplace platform. This role requires strong expertise in the MERN stack, Web3.js, Metamask integration, and NFT market development. Responsibilities:* Develop and maintain the front-end (React.js) and back-end (Node.js, Express.js, MongoDB) of the NFT marketplace platform.* Implement Web3.js functionalities for seamless integration with the blockchain, including:* Smart contract interaction.* Secure token management and transactions.* Metamask wallet integration for user authentication and transactions.* Design and develop robust APIs for interacting with blockchain networks and external services.* Build secure and scalable solutions for managing NFTs, including minting, listing, bidding, and purchasing.* Develop and implement innovative features to enhance the user experience and functionality of the platform.* Collaborate with designers and other developers to ensure a seamless and visually appealing platform.* Stay up-to-date with the latest advancements in blockchain technology, Web3.js, and NFT development. Qualifications:* Strong proficiency in the MERN stack (MongoDB, Express.js, React.js, Node.js).* Extensive experience with Web3.js and its applications in blockchain development.* In-depth understanding of smart contracts, token standards (ERC-20, ERC-721), and blockchain fundamentals.* Experience with Metamask wallet integration and other popular crypto wallets.* Proven track record of building and deploying successful NFT marketplace platforms or related applications.* Excellent communication, problem-solving, and analytical skills.* Ability to work independently and as part of a team. Bonus Points:* Familiarity with other blockchain platforms (Ethereum, Solana, Polygon).* Experience with front-end frameworks like Next.js or Gatsby.* Knowledge of cloud platforms like AWS or Google Cloud.* Passion for the NFT and blockchain space. We offer:* Competitive salary and benefits package.* Opportunity to work on cutting-edge blockchain projects.* Collaborative and supportive work environment.* Opportunities for professional development and growth. Apply:Please submit your resume and cover letter to salceanu@techtrovedev.com.